CN102324971B - A kind of optical module and light path detection method - Google Patents
A kind of optical module and light path detection method Download PDFInfo
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- CN102324971B CN102324971B CN201110258817.5A CN201110258817A CN102324971B CN 102324971 B CN102324971 B CN 102324971B CN 201110258817 A CN201110258817 A CN 201110258817A CN 102324971 B CN102324971 B CN 102324971B
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Abstract
The invention discloses a kind of optical module and light path detection method, it is achieved simple, low cost.Described method includes: the downlink optical signal that the first descending optical transmitting set is launched enters optical fiber interface through wavelength-division multiplex filter plate and beam splitter；Uplink optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, wavelength-division multiplex filter plate；Second descending optical transmitting set control command based on control unit launches detection optical signal, detection optical signal is different from up-downgoing wavelength of optical signal, detection optical signal enters optical fiber interface through beam splitter, the reflection light of detection optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, wavelength-division multiplex filter plate；The reflection light of described detection optical signal is converted to the signal of telecommunication and exports to control unit by optical receiver；The control unit signal of telecommunication to transmitting from described optical receiver carries out data process, through light path detection interface data after optical line terminal transmission processes.
Description
Technical field
The present invention relates to fiber optic communication field, be specifically related to a kind of optical module and light path detection method.
Background technology
Along with the fast development of Fibre Optical Communication Technology and cost degradation and the requirement of environmental protection so that communication network, from core net, Metropolitan Area Network (MAN) to access network and fiber to the home and light entering and copper back, all uses optical fiber network consistings to have become as basic Consensus.
No matter GPON (the Gigabit-CapablePON in EPON, gigabit passive optical network) or EPON (EthernetPassiveOpticalNetwork, Ethernet passive optical network), its descending light is 1490nm (nanometer), and up light is 1310nm, its corresponding optical module is single fiber bi-directional, the optical module of typical optical line terminal is as it is shown in figure 1, it is made up of an optical transmitting set (Tx) and an optical receiver (Rx) and wavelength-division multiplex filter plate (WDM).Annexation between them, as shown in Figure 1, descending light is sent by Tx and enters trunk optical fiber through WDM guiding fiber interface, up light is entered by optical fiber interface and guides optical receiver Rx through WDM, its wavelength-division multiplex filter plate WDM is by the film filtering slice (TFF at edge, ThinFilmFilter) composition, i.e. the wavelength of 1310nm is reflection, and the wavelength of 1490nm is transmission.
The laying of substantial amounts of optical-fiber network and after disposing, the operation of network and maintenance have become as detection and the fault location of one of problem that operator pays close attention to most, particularly fibre circuit.
Existing major way is off-line, outside equipment, i.e. dispose an optical time domain detector (OTDR, OpticalTimeDomainReflector) by wave multiplexer OTDR detect photosynthetic enter trunk optical fiber detect, due to OTDR equipment costly, operate the most convenient, patching every time and also have a certain impact business, therefore O&M cost is higher.
Summary of the invention
The technical problem to be solved is to provide a kind of optical module and light path detection method, it is achieved simple, low cost.
For solving above-mentioned technical problem, the invention provides a kind of optical module, including: the first descending optical transmitting set, wavelength-division multiplex filter plate (WDM), optical receiver, the second descending optical transmitting set, beam splitter, control unit and light path detection interface, described first descending optical transmitting set is connected with wavelength-division multiplex filter plate, wherein:
Described wavelength-division multiplex filter plate, is connected with beam splitter and optical receiver respectively, guides beam splitter for the downlink optical signal launched by the first descending optical transmitting set, by the uplink optical signal imported from beam splitter or the guides reflected light optical receiver of detection optical signal；
Described beam splitter, is connected with the second descending optical transmitting set and optical fiber interface respectively, is used for downlink optical signal guiding fiber interface, and by the uplink optical signal entered from optical fiber interface or the guides reflected light wavelength-division multiplex filter plate of detection optical signal；
Described second descending optical transmitting set, launches detection optical signal for control command based on described control unit, and the wavelength of described detection optical signal is different from up-downgoing wavelength of optical signal；
Described optical receiver, for receiving the uplink optical signal imported from wavelength-division multiplex filter plate or the reflection light of detection optical signal, is converted to signal of telecommunication output to described control unit by the reflection light of described detection optical signal；
Described control unit, it is electrically connected with described light path detection interface, the second descending optical transmitting set and optical receiver respectively, for according to from described light path detection interface to control command to this second descending optical transmitting set transmitting control commands, and for the signal of telecommunication transmitted from described optical receiver is carried out data process, through described light path detection interface data after optical line terminal transmission processes；
Described light path detection interface, for being connected with optical line terminal.
Further, the wavelength of described detection optical signal is more than 1600nm.
Further, the described control unit signal of telecommunication to transmitting from described optical receiver carries out data process, including: the described control unit signal of telecommunication to transmitting from described optical receiver carries out calculation system；Or, the described control unit signal of telecommunication to transmitting from described optical receiver carries out calculation system and Mathematical treatment.
Further, described control unit is electrically connected with described light path detection interface, the second descending optical transmitting set and optical receiver in the following ways: optical receiver is connected trans-impedance amplifier, and a road of this trans-impedance amplifier is connected to described control unit；Second descending optical transmitting set and a laser driver are connected, and this laser driver is connected with described control unit；This control unit is connected with described light path detection interface.
For solving above-mentioned technical problem, present invention also offers a kind of light path detection method, it is adaptable to above-mentioned optical module, including:
The downlink optical signal that first descending optical transmitting set is launched enters optical fiber interface through wavelength-division multiplex filter plate and beam splitter；
Uplink optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, wavelength-division multiplex filter plate；
Second descending optical transmitting set control command based on control unit launches detection optical signal, described detection optical signal is different from up-downgoing wavelength of optical signal, described detection optical signal enters optical fiber interface through beam splitter, the reflection light of described detection optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, wavelength-division multiplex filter plate；
The reflection light of described detection optical signal is converted to signal of telecommunication output to described control unit by described optical receiver；
The described control unit signal of telecommunication to transmitting from described optical receiver carries out data process, through light path detection interface data after optical line terminal transmission processes.
Another technical problem to be solved by this invention is to provide a kind of optical module and light path detection method, it is achieved light path detection is noiseless to business.
For solving above-mentioned technical problem, the invention provides a kind of optical module, including: the first descending optical transmitting set of being sequentially connected, the first wavelength-division multiplex filter plate, the first optical receiver, second descending optical transmitting set, the second optical receiver, the second wavelength-division multiplex filter plate, beam splitter, control unit and light path detection interface, wherein:
Described first wavelength-division multiplex filter plate, it is connected with the second wavelength-division multiplex filter plate, for the downlink optical signal that the first descending optical transmitting set is launched is guided the second wavelength-division multiplex filter plate, the uplink optical signal imported from the second wavelength-division multiplex filter plate is guided the first optical receiver；
Described second wavelength-division multiplex filter plate, it is connected with beam splitter and the second optical receiver respectively, downlink optical signal for importing from the first wavelength-division multiplex filter plate guides beam splitter, and the uplink optical signal imported from beam splitter is guided the first wavelength-division multiplex filter plate, guides reflected light the second optical receiver detecting optical signal that will import from beam splitter；
Described second optical receiver, for receiving the reflection light of the detection optical signal imported from the second wavelength-division multiplex filter plate, and is converted to signal of telecommunication output to described control unit by the reflection light of described detection optical signal；
Described second descending optical transmitting set, is connected with beam splitter, launches detection optical signal for control command based on described control unit, and the wavelength of described detection optical signal is different from up-downgoing wavelength of optical signal；
Described beam splitter, is connected with optical fiber interface, for by downlink optical signal guiding fiber interface, will detect optical signal guiding fiber interface, uplink optical signal guides the second wavelength-division multiplex filter plate, will detect guides reflected light the second wavelength-division multiplex filter plate of optical signal；
Described control unit, it is electrically connected with described light path detection interface, the second descending optical transmitting set and the second optical receiver respectively, for according to from described light path detection interface to control command to this second descending optical transmitting set transmitting control commands, and for the signal of telecommunication transmitted from described second optical receiver is carried out data process, through described light path detection interface data after optical line terminal transmission processes；
Described light path detection interface, for being connected with optical line terminal.
Further, the wavelength of described detection optical signal is more than 1600nm.
Further, described control unit carries out data process to the signal of telecommunication transmitted from described second optical receiver, including: described control unit carries out calculation system to the signal of telecommunication transmitted from described second optical receiver；Or, described control unit carries out calculation system and Mathematical treatment to the signal of telecommunication transmitted from described second optical receiver.
For solving above-mentioned technical problem, present invention also offers a kind of light path detection method, it is adaptable to above-mentioned optical module, including:
The downlink optical signal that first descending optical transmitting set is launched enters optical fiber interface through the first wavelength-division multiplex filter plate, the second wavelength-division multiplex filter plate and beam splitter；
Uplink optical signal is entered by optical fiber interface, enters the first optical receiver through beam splitter, the second wavelength-division multiplex filter plate, the first wavelength-division multiplex filter plate；
Described second descending optical transmitting set control command based on control unit launches detection optical signal, and described detection optical signal is different from up-downgoing wavelength of optical signal, and described detection optical signal enters optical fiber interface through beam splitter；
The reflection light of described detection optical signal is entered by optical fiber interface, enters the second optical receiver through beam splitter, the second wavelength-division multiplex filter plate；
The reflection light of described detection optical signal is converted to signal of telecommunication output to described control unit by described second optical receiver；
Described control unit carries out data process to the signal of telecommunication transmitted from described second optical receiver, through light path detection interface data after optical line terminal transmission processes.
Existing optical module is changed less by embodiment of the present invention optical module, adds the function of light path detection simultaneously, uses this optical module and method to carry out light path detection the least to existing traffic interference.
Accompanying drawing explanation
Fig. 1 is the structural representation of original simplex optical module；
Fig. 2 is the optical module structure schematic diagram of the embodiment of the present invention 1 the 3rd wavelength；
Fig. 3 be the embodiment of the present invention 1 the 3rd wavelength optical module detailed construction and with external interface schema；
Fig. 4 is the optical module structure schematic diagram of the embodiment of the present invention 2 the 3rd wavelength；
Fig. 5 is the optical module detailed construction of the embodiment of the present invention 2 the 3rd wavelength and external interface diagram.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiments of the invention are described in detail.It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can mutual combination in any.
In order to the optical module shown in Fig. 1 being increased the function of light path detection, need this optical module is increased some active and passive devices.
Embodiment 1
The present embodiment describes a kind of optical module comprising control unit, as shown in Figure 2, this optical module includes the first descending optical transmitting set (Tx0), wavelength-division multiplex filter plate (WDM), optical receiver (Rx), second descending optical transmitting set (Tx1), beam splitter, control unit and light path detection interface, wherein:
This first descending optical transmitting set, is connected with wavelength-division multiplex filter plate, is used for launching downlink optical signal；Specifically, downlink optical signal is launched in the order based on optical line terminal (OLT) of this first descending optical transmitting set；
This wavelength-division multiplex filter plate, is connected with beam splitter and optical receiver respectively, guides beam splitter for the downlink optical signal launched by the first descending optical transmitting set, by the uplink optical signal imported from beam splitter or the guides reflected light optical receiver of detection optical signal；
This beam splitter, is connected with the second descending optical transmitting set and optical fiber interface respectively, is used for downlink optical signal guiding fiber interface, and by the uplink optical signal entered from optical fiber interface or the guides reflected light wavelength-division multiplex filter plate of detection optical signal；
This second descending optical transmitting set, launches detection optical signal for control command based on described control unit, and the wavelength of this detection optical signal is different from up-downgoing wavelength of optical signal；
This optical receiver, for receiving the uplink optical signal imported from wavelength-division multiplex filter plate or the reflection light of detection optical signal, is converted to signal of telecommunication output to described control unit by the reflection light of described detection optical signal；
This control unit, it is electrically connected with described light path detection interface, the second descending optical transmitting set and optical receiver respectively, for according to from light path detection interface to order to this second descending optical transmitting set transmitting control commands, and for the signal of telecommunication transmitted from this optical receiver is carried out data process, the data after processing are sent to optical line terminal through described light path detection interface；
Described light path detection interface, for being connected with optical line terminal.
The above-mentioned up-downgoing wavelength of optical signal that is different from refers to be different from uplink optical signal wavelength, also different from downlink optical signal wavelength.
Second descending optical transmitting set and the first descending optical transmitting set realize timesharing transmission optical signal by receiving order.This order in the present embodiment is the order sent by external module (the MAC chip of such as OLT).
Preferably, this control unit the signal of telecommunication transmitted from optical receiver can be carried out following any one process:
The signal of telecommunication received is carried out calculation system, such as analog-to-digital conversion process；
The signal of telecommunication received is carried out calculation system and Mathematical treatment, such as, light is detected for pulse, Mathematical treatment can be that the data obtained after repeated detection are carried out statistical average calculating, for multi pulse detection light, Mathematical treatment the most also includes orthogonal sequence or gray code sequence algorithm process etc..
By this light path detection module, this control unit can realize reporting result.
Preferably, this wavelength-division multiplex filter plate (WDM) edge film filtering slice composition, the light that may be configured as below 1450nm in the present embodiment is reflected, and the equal transmission of the light of more than 1450nm.
Preferably, in the present embodiment, the splitting ratio of beam splitter is 10% and 90%, as shown in the figure.Other value can also be selected in other embodiments.
The light path detection interface that the uplink optical signal from the importing of wavelength-division multiplex filter plate that above-mentioned optical receiver receives can directly pass through to be connected with OLT module exports to OLT.
Fig. 3 is the detailed construction of the optical module including control unit and is connected figure with external equipment, OLTMAC chip in figure is OLT (opticallineterminal, optical line terminal) medium education chip (MediumAccessControl, it is called for short MAC), LDD (LaserDiodeDriver) is laser driver, LIA is limiting amplifier, TIA is trans-impedance amplifier, OTDR processing unit is above-mentioned control unit, and OTDR line interface is above-mentioned light path detection interface.The work process describing the optical module comprising control unit with structure shown in Fig. 3 is as follows:
First the signal of telecommunication being sent startup fiber laser arrays preparation by the MAC chip of OLT by Txdata (data) line instructs, i.e. notify that the ONU of user side stops launching uplink service, LDD0 sends downlink optical signal according to this signal of telecommunication order-driven optical transmitting set Tx0, this downlink optical signal is the optical signal of 1490nm to GPON/EPON, and be the optical signal of 1577nm to XG-PON/10G-EPON, it is directed to optical fiber interface through WDM0 transmission mouth P to general mouth C and beam splitter and enters trunk optical fiber, the ONU of user side is arrived through ODN, and ONU stops launching up light according to instruction；nullWhether the MAC chip of OLT can perform order with perception ONU by the connecting line of its Rx simultaneously，Determine after having performed，MAC chip sends the instruction of startup light path detection and issues OTDR processing unit by the connecting line of its OTDR，This OTDR processing unit opens optical transmitting set Tx1 by TxDisable (invalid) line traffic control LDD1，Then optical transmitting set Tx1 is made to send the detection light of non-traffic wavelength (such as by TxData line traffic control LDD1，Pulsed light or continuous light)，Select this detection wavelength of optical signal more than 1600nm in the present embodiment，The optical signal such as selecting wavelength to be 1625nm or 1650nm，It is directed to optical fiber interface through beam splitter and enters trunk optical fiber and ODN network，And it reflects light accordingly and is entered through beam splitter and WDM general mouth C to reflex port R arrival optical receiver Rx by optical fiber interface，After optical receiver Rx converts optical signals to the signal of telecommunication，This signal of telecommunication shunts on OTDR processing unit after TIA，The signal of telecommunication that this OTDR processing unit record receives.The operation of this record needs the number of times repeated to be determined by certainty of measurement, general thousand of times the most up to ten thousand times.OTDR processing unit is according to these data of record, carry out statistical average finally draw the light path detection light intensity that i.e. receives of data along with fiber distance change (in other embodiments, this OTDR processing unit can not carry out record and statistical average processes, but after receiving the signal of telecommunication every time, by being sent on OLT through fiber laser arrays interface after digital-to-analogue calculation system, Mathematical treatment is carried out) by OLT or other computing units, this light path detection data are uploaded to the MAC chip of OLT by OTDR processing unit by OTDR line interface, this light path detection data are estimated by the EMS (Element management system) of OLT or more last layer, if it is considered to it is defective, OTDR processing unit will be continued through again test, i.e. repeat process above；If it is considered to qualified, then close test device by OTDR line notice OTDR processing unit, OTDR processing unit controls LDD2 by TxDisable and closes optical transmitting set Tx1, then informs that the MAC test of OLT is over by OTDR line.At this moment MAC notifies optical transmitting set Tx0 by TxData line, uplink service can be recovered, by optical signal, Tx0 notifies that the ONU of user side can recover to launch up light according to the regulation of corresponding DBA (Dynamic Bandwidth Allocation), ONU launches the signal of up smooth 1310nm the most successively, the optical fiber interface arriving optical module through ODN and trunk optical fiber enters on beam splitter and WDM general mouth C to reflex port R arrival optical receiver Rx, is then returned on the MAC of OLT through Rx line by amplifiers such as TIA and LIA.In the present embodiment, Tx0 and Tx1 realizes the timesharing descending light of transmission and test light by receiving order, and i.e. when test, the business of up light stops transmitting, so tests and business can not interfere with each other.
The present embodiment optical module adds an optical transmitting set, a beam splitter, a control unit and a light path detection interface, reuse original optical receiver Rx, in test process, optical receiver timesharing receives uplink optical signal or the reflection light of detection optical signal, and original optical module is done less change by this method.Meanwhile, by adding the OTDR processing unit with light path detection function in optical module, the cost of light path detection can be reduced, and use more flexible.Further, since used the detection light of more than 1600nm so that the little fiber failures such as fibre-optical bending also can be detected by optical module, improves accuracy of detection.
The method using the present embodiment optical module to carry out testing includes: the downlink optical signal that the first descending optical transmitting set is launched arrives optical fiber interface through WDM and beam splitter and enters optical fiber interface；Uplink optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, WDM；This second descending optical transmitting set control command based on control unit launches detection optical signal, described detection optical signal is different from up-downgoing wavelength of optical signal, described detection optical signal enters optical fiber interface through beam splitter, the reflection light of this detection optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, WDM；The reflection light of detection optical signal is converted to the signal of telecommunication and exports to control unit by optical receiver；The control unit signal of telecommunication to transmitting from optical receiver carries out data process, through light path detection interface data after optical line terminal transmission processes.The process of the signal of telecommunication is included by control unit: calculation system, or calculation system and Mathematical treatment.
Second descending optical transmitting set and the first descending optical transmitting set timesharing send optical signal, such as, after the first descending optical transmitting set stops launching according to the control command received, the second descending optical transmitting set starts the detection optical signal being different from up-downgoing wavelength of optical signal launched according to the control command received.
Embodiment 2
The present embodiment introduces a kind of optical module realizing on-line testing, as shown in Figure 4, including for the first descending optical transmitting set (Tx0), the first wavelength-division multiplex filter plate (WDM0), the first optical receiver (Rx0), and the second descending optical transmitting set (Tx1), the second optical receiver (Rx1), the second wavelength-division multiplex filter plate (WDM1), beam splitter, control unit and light path detection interface, wherein:
This first descending optical transmitting set, is connected with the first wavelength-division multiplex filter plate, is used for launching downlink optical signal；
This first wavelength-division multiplex filter plate, it is connected with the second wavelength-division multiplex filter plate and the first optical receiver respectively, for the downlink optical signal that the first descending optical transmitting set is launched is guided the second wavelength-division multiplex filter plate, the uplink optical signal imported from the second wavelength-division multiplex filter plate is guided the first optical receiver；
This first optical receiver, for receiving the uplink optical signal imported from the first wavelength-division multiplex filter plate, and is converted into the signal of telecommunication；
This second wavelength-division multiplex filter plate, it is connected with beam splitter and the second optical receiver respectively, downlink optical signal for importing from the first wavelength-division multiplex filter plate guides beam splitter, and the uplink optical signal imported from beam splitter is guided the first wavelength-division multiplex filter plate, guides reflected light the second optical receiver detecting optical signal that will import from beam splitter；
This second optical receiver, for receiving the reflection light of the detection optical signal imported from the second wavelength-division multiplex filter plate, and is converted to signal of telecommunication output to described control unit by the reflection light of this detection optical signal；
This second descending optical transmitting set, is connected with beam splitter, launches detection optical signal for control command based on described control unit, and the wavelength of described detection optical signal is different from up-downgoing wavelength of optical signal；
This beam splitter, is connected with optical fiber interface, for by downlink optical signal guiding fiber interface, will detect optical signal guiding fiber interface, uplink optical signal guides the second wavelength-division multiplex filter plate, will detect guides reflected light the second wavelength-division multiplex filter plate of optical signal；
Described control unit, it is electrically connected with described light path detection interface, the second descending optical transmitting set and the second optical receiver respectively, for according to from described light path detection interface to control command to this second descending optical transmitting set transmitting control commands, and for the signal of telecommunication transmitted from the second optical receiver is carried out data process, the data output after processing is sent to optical line terminal through light path detection interface；
Described light path detection interface, for being connected with optical line terminal,.
Above-mentioned first descending optical transmitting set and the first optical receiver can use the optical transmitting set in existing optical module and optical receiver to realize, this the first wavelength-division multiplex filter plate is with the wavelength-division multiplex filter plate difference in existing optical module, and it is for guiding the second wavelength-division multiplex filter plate by the downlink optical signal that the first descending optical transmitting set is launched.
Preferably, control unit the signal of telecommunication transmitted from the second optical receiver can be carried out following any one process:
This signal of telecommunication is carried out calculation system, such as analog-to-digital conversion process；
This signal of telecommunication is carried out calculation system and Mathematical treatment, such as: detecting light for pulse, Mathematical treatment can be that the detection data repeatedly accumulated are carried out statistical average calculating process, to multi pulse detection light, needs some algorithms, such as: orthogonal sequence algorithm etc..
Preferably, this first wavelength-division multiplex filter plate (WDM0) edge film filtering slice composition, the light being set to below 1450nm in the present embodiment is reflected, and the equal transmission of the light of more than 1450nm.Using this kind of method to set up, even if after optical module upgrades to the optical module of 10G, its WDM0 is the most reusable.Second wavelength-division multiplex filter plate (WDM1) is made up of edge film filtering slice, and section is set to the light of 1625nm and is reflected in the present embodiment, and other wavelength are transmitted.
Preferably, in the present embodiment, the splitting ratio of beam splitter is 10% and 90%, as shown in the figure.Other value can also be selected in other embodiments.
Fig. 5 is that the present embodiment includes the detailed construction of the optical module of control unit and is connected figure with external equipment, the MAC chip that OLTMAC chip is OLT in figure, LDD is laser driver, LIA is limiting amplifier, TIA is trans-impedance amplifier, OTDR processing unit is above-mentioned control unit, and OTDR line interface is above-mentioned light path detection interface.The work process describing the optical module comprising control unit with structure shown in Fig. 5 is as follows:
Normal up-downgoing business procedure: LDD0 drives optical transmitting set Tx0 to send downlink optical signal, this downlink optical signal is the optical signal of 1490nm to GPON/EPON, and be the optical signal of 1577nm to XG-PON/10G-EPON, it is directed to optical fiber interface through WDM0 transmission mouth P to general mouth C and WDM1 transmission mouth T to general mouth C and beam splitter and enters trunk optical fiber, arrive the ONU of user side through ODN；And up smooth 1310nm is entered through beam splitter and WDM1 general mouth C to transmission mouth P and WDM1 general mouth C to reflex port R arrival optical receiver Rx0 by optical fiber interface, then through TIA0 and LIA entrance OLT.
nullThe MAC chip of light path detection process: OLT sends the signal of telecommunication instruction starting light path detection and issues OTDR processing unit by light path detection interface，This OTDR processing unit opens optical transmitting set Tx1 by TxDisable (invalid) line traffic control LDD1，Then optical transmitting set Tx1 is made to send the detection light of non-traffic wavelength by TxData line traffic control LDD1，The light of optional more than 1600nm detects light as light path，It is typically chosen in the wave band [1625nm of ITU-TL.66 specification，1675nm]，The optical signal of such as 1625nm or 1650nm，It is directed to optical fiber interface through beam splitter and enters trunk optical fiber and ODN network，And it reflects light accordingly and is entered through beam splitter and WDM1 general mouth C to reflex port R arrival optical receiver Rx1 by optical fiber interface，After optical receiver Rx1 converts optical signals to the signal of telecommunication，This signal of telecommunication enters OTDR processing unit through TIA1.After the OTDR processing unit signal of telecommunication to receiving carries out modulus process, data after process are sent to OLT through light path detection interface, or store testing the signal of telecommunication obtained every time after calculation system, to be tested complete after, to all of test data statistics average after export to OLT through light path detection interface.Statistical computation process is carried out for example with DSP (DigitalSignalProcessing, Digital Signal Processing) chip.
Above-mentioned light path detection process is carried out with up-downgoing business procedure simultaneously, does not interfere with each other.Distinguishing up light and test light by the method for WDM1 wavelength-division, i.e. in test process, the business of up light can proceed, and is not necessary to interrupt, and so test and business can be normally carried out simultaneously, and all of business will be interference-free.
The present embodiment optical module adds an optical transmitting set and passive leaded light device, new optical receiver Rx1, control unit and light path detection interface, this ensure that and be not required to interrupting service during light path detects, test can be carried out with business simultaneously, and business is interference-free.Further, since this enforcement employs the detection light of 1625nm so that the little fiber failures such as fibre-optical bending also can be detected by it, improves accuracy of detection.
The method using above-mentioned optical module to carry out testing includes: the downlink optical signal that this first descending optical transmitting set is launched arrives optical fiber interface through the first wavelength-division multiplex filter plate, the second wavelength-division multiplex filter plate and beam splitter and enters optical fiber interface；Uplink optical signal is entered by optical fiber interface, enters the first optical receiver through beam splitter, the second wavelength-division multiplex filter plate, the first wavelength-division multiplex filter plate；This second descending optical transmitting set control command based on control unit launches detection optical signal, described detection optical signal is different from up-downgoing wavelength of optical signal, this detection optical signal enters optical fiber interface through beam splitter, the reflection light of this detection optical signal is entered by optical fiber interface, entering the second optical receiver through beam splitter, the second wavelength-division multiplex filter plate, the reflection light of detection optical signal is converted to the signal of telecommunication and exports to control unit by this second optical receiver；Control unit carries out data process to the signal of telecommunication transmitted from described second optical receiver, through light path detection interface data after optical line terminal transmission processes.
Concrete structure figure in above-described embodiment is merely illustrative, and those skilled in the art can use other to have the device of identical function on the premise of knowing each functions of modules and replace the optical device in said structure.
One of ordinary skill in the art will appreciate that all or part of step in said method can instruct related hardware by program and complete, described program can be stored in computer-readable recording medium, such as read only memory, disk or CD etc..Alternatively, all or part of step of above-described embodiment can also use one or more integrated circuit or optical device to realize.Correspondingly, each module/unit in above-described embodiment can realize to use the form of hardware, it would however also be possible to employ the form of software function module realizes.The present invention is not restricted to the combination of the hardware and software of any particular form.
Certainly; the present invention also can have other various embodiments; in the case of without departing substantially from present invention spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and deformation according to the present invention, but these change accordingly and deform the protection domain that all should belong to appended claims of the invention.
Claims (10)
1. an optical module, including: the first descending optical transmitting set, it is characterized in that, also include: wavelength-division multiplex filter plate WDM, optical receiver, the second descending optical transmitting set, beam splitter, control unit and light path detection interface, described first descending optical transmitting set is connected with wavelength-division multiplex filter plate, wherein:
Described wavelength-division multiplex filter plate, is connected with beam splitter and optical receiver respectively, guides beam splitter for the downlink optical signal launched by the first descending optical transmitting set, by the uplink optical signal imported from beam splitter or the guides reflected light optical receiver of detection optical signal；
Described beam splitter, is connected with the second descending optical transmitting set and optical fiber interface respectively, is used for downlink optical signal guiding fiber interface, and by the uplink optical signal entered from optical fiber interface or the guides reflected light wavelength-division multiplex filter plate of detection optical signal；
Described second descending optical transmitting set, launches detection optical signal for control command based on described control unit, and the wavelength of described detection optical signal is different from up-downgoing wavelength of optical signal；
Described optical receiver, for receiving the uplink optical signal imported from wavelength-division multiplex filter plate or the reflection light of detection optical signal, is converted to signal of telecommunication output to described control unit by the reflection light of described detection optical signal；
Described control unit, it is electrically connected with described light path detection interface, the second descending optical transmitting set and optical receiver respectively, for according to from described light path detection interface to control command to this second descending optical transmitting set transmitting control commands, and for the signal of telecommunication transmitted from described optical receiver is carried out data process, through described light path detection interface data after optical line terminal transmission processes；The downlink optical signal that first descending optical transmitting set is launched arrives optical fiber interface through WDM and beam splitter, uplink optical signal is entered by optical fiber interface, optical receiver is entered through beam splitter and WDM, detection optical signal enters optical fiber interface through beam splitter, the reflection light of detection optical signal is entered by optical fiber interface, enters optical receiver through beam splitter and WDM；
Described light path detection interface, for being connected with optical line terminal.
2. optical module as claimed in claim 1, it is characterised in that:
The wavelength of described detection optical signal is more than 1600nm.
3. optical module as claimed in claim 1 or 2, it is characterised in that:
The described control unit signal of telecommunication to transmitting from described optical receiver carries out data process, including:
The described control unit signal of telecommunication to transmitting from described optical receiver carries out calculation system；Or
The described control unit signal of telecommunication to transmitting from described optical receiver carries out calculation system and Mathematical treatment.
4. optical module as claimed in claim 3, it is characterised in that:
Described control unit is electrically connected with described light path detection interface, the second descending optical transmitting set and optical receiver in the following ways:
Optical receiver connects trans-impedance amplifier, and a road of this trans-impedance amplifier is connected to described control unit；
Second descending optical transmitting set and a laser driver are connected, and this laser driver is connected with described control unit；
This control unit is connected with described light path detection interface.
5. the light path detection method using optical module as claimed in claim 1, it is adaptable to optical module as claimed in claim 1, including:
The downlink optical signal that first descending optical transmitting set is launched enters optical fiber interface through wavelength-division multiplex filter plate and beam splitter；
Uplink optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, wavelength-division multiplex filter plate；
Second descending optical transmitting set control command based on control unit launches detection optical signal, described detection optical signal is different from up-downgoing wavelength of optical signal, described detection optical signal enters optical fiber interface through beam splitter, the reflection light of described detection optical signal is entered by optical fiber interface, enters optical receiver through beam splitter, wavelength-division multiplex filter plate；
The reflection light of described detection optical signal is converted to signal of telecommunication output to described control unit by described optical receiver；
The described control unit signal of telecommunication to transmitting from described optical receiver carries out data process, through light path detection interface data after optical line terminal transmission processes.
6. method as claimed in claim 5, it is characterised in that:
The wavelength of described detection optical signal is more than 1600nm.
7. an optical module, including: the first descending optical transmitting set of being sequentially connected, the first wavelength-division multiplex filter plate, the first optical receiver, it is characterized in that, described optical module also includes: the second descending optical transmitting set, the second optical receiver, the second wavelength-division multiplex filter plate, beam splitter, control unit and light path detection interface, wherein:
Described first wavelength-division multiplex filter plate, it is connected with the second wavelength-division multiplex filter plate, for the downlink optical signal that the first descending optical transmitting set is launched is guided the second wavelength-division multiplex filter plate, the uplink optical signal imported from the second wavelength-division multiplex filter plate is guided the first optical receiver；
Described second wavelength-division multiplex filter plate, it is connected with beam splitter and the second optical receiver respectively, downlink optical signal for importing from the first wavelength-division multiplex filter plate guides beam splitter, and the uplink optical signal imported from beam splitter is guided the first wavelength-division multiplex filter plate, guides reflected light the second optical receiver detecting optical signal that will import from beam splitter；
Described second optical receiver, for receiving the reflection light of the detection optical signal imported from the second wavelength-division multiplex filter plate, and is converted to signal of telecommunication output to described control unit by the reflection light of described detection optical signal；
Described second descending optical transmitting set, is connected with beam splitter, launches detection optical signal for control command based on described control unit, and the wavelength of described detection optical signal is different from up-downgoing wavelength of optical signal；
Described beam splitter, is connected with optical fiber interface, for by downlink optical signal guiding fiber interface, will detect optical signal guiding fiber interface, uplink optical signal guides the second wavelength-division multiplex filter plate, will detect guides reflected light the second wavelength-division multiplex filter plate of optical signal；
Described control unit, it is electrically connected with described light path detection interface, the second descending optical transmitting set and the second optical receiver respectively, for according to from described light path detection interface to control command to this second descending optical transmitting set transmitting control commands, and for the signal of telecommunication transmitted from described second optical receiver is carried out data process, through described light path detection interface data after optical line terminal transmission processes；The downlink optical signal that first descending optical transmitting set is launched arrives optical fiber interface through the first wavelength-division multiplex filter plate, the second wavelength-division multiplex filter plate and beam splitter, uplink optical signal is entered by optical fiber interface, the first optical receiver is entered through beam splitter, the second wavelength-division multiplex filter plate and the first wavelength-division multiplex filter plate, detection optical signal enters optical fiber interface through beam splitter, the reflection light of detection optical signal is entered by optical fiber interface, enters the second optical receiver through beam splitter and the second wavelength-division multiplex filter plate；
Described light path detection interface, for being connected with optical line terminal.
8. optical module as claimed in claim 7, it is characterised in that:
The wavelength of described detection optical signal is more than 1600nm.
9. optical module as claimed in claim 7 or 8, it is characterised in that:
Described control unit carries out data process to the signal of telecommunication transmitted from described second optical receiver, including:
Described control unit carries out calculation system to the signal of telecommunication transmitted from described second optical receiver；Or
Described control unit carries out calculation system and Mathematical treatment to the signal of telecommunication transmitted from described second optical receiver.
10. the light path detection method using optical module as claimed in claim 7, it is adaptable to optical module as claimed in claim 7, including:
The downlink optical signal that first descending optical transmitting set is launched enters optical fiber interface through the first wavelength-division multiplex filter plate, the second wavelength-division multiplex filter plate and beam splitter；
Uplink optical signal is entered by optical fiber interface, enters the first optical receiver through beam splitter, the second wavelength-division multiplex filter plate, the first wavelength-division multiplex filter plate；
Described second descending optical transmitting set control command based on control unit launches detection optical signal, and described detection optical signal is different from up-downgoing wavelength of optical signal, and described detection optical signal enters optical fiber interface through beam splitter；
The reflection light of described detection optical signal is entered by optical fiber interface, enters the second optical receiver through beam splitter, the second wavelength-division multiplex filter plate；
The reflection light of described detection optical signal is converted to signal of telecommunication output to described control unit by described second optical receiver；
Described control unit carries out data process to the signal of telecommunication transmitted from described second optical receiver, through light path detection interface data after optical line terminal transmission processes.
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| WO2016090634A1 (en) * | 2014-12-12 | 2016-06-16 | 华为技术有限公司 | Passive optical network device |
| CN112311450A (en) * | 2019-07-31 | 2021-02-02 | 宇捷光子科技(南京)有限公司 | Different-wavelength single-fiber bidirectional optical module capable of integrating OTDR function and detection method thereof |
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| CN201414130Y (en) * | 2009-05-27 | 2010-02-24 | 华为技术有限公司 | Photoelectric integral component and passive optical network element |
| CN102122989A (en) * | 2010-01-08 | 2011-07-13 | 华为技术有限公司 | Line monitoring method, device and system |
| CN102170309A (en) * | 2011-03-24 | 2011-08-31 | 索尔思光电（成都）有限公司 | Optical line terminal (OLT) optical module integrating optical time domain reflectometer (OTDR) monitoring function |
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| CN201414130Y (en) * | 2009-05-27 | 2010-02-24 | 华为技术有限公司 | Photoelectric integral component and passive optical network element |
| CN102122989A (en) * | 2010-01-08 | 2011-07-13 | 华为技术有限公司 | Line monitoring method, device and system |
| CN102170309A (en) * | 2011-03-24 | 2011-08-31 | 索尔思光电（成都）有限公司 | Optical line terminal (OLT) optical module integrating optical time domain reflectometer (OTDR) monitoring function |
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