CN113991402A - An ultra-high bandwidth quasi-all-fiber amplifier - Google Patents
An ultra-high bandwidth quasi-all-fiber amplifier Download PDFInfo
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- 239000000835 fiber Substances 0.000 title claims abstract description 69
- 230000008878 coupling Effects 0.000 claims abstract description 84
- 238000010168 coupling process Methods 0.000 claims abstract description 84
- 238000005859 coupling reaction Methods 0.000 claims abstract description 84
- 239000013307 optical fiber Substances 0.000 claims abstract description 74
- 238000001914 filtration Methods 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
- H01S3/094015—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre with pump light recycling, i.e. with reinjection of the unused pump light back into the fiber, e.g. by reflectors or circulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094049—Guiding of the pump light
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Abstract
本发明属于光纤放大器技术领域，涉及一种超高带宽的准全光纤放大器，包括若干级耦合单元以及若干级耦合滤波单元，若干级耦合单元依次通过增益光纤进行连接，若干级耦合滤波单元依次通过增益光纤进行连接，最后一级耦合单元通过增益光纤与第一级耦合滤波单元连接。本发明能够利用现有技术和产品条件，克服高带宽、超高带宽光纤放大器面临的元件带宽限制问题，并仍然保持全光纤放大器无需光电转换、易于与光纤系统连接、便于安装携带等优点。
The invention belongs to the technical field of optical fiber amplifiers, and relates to a quasi-all-fiber amplifier with ultra-high bandwidth, comprising several stages of coupling units and several stages of coupling filter units, the several stages of coupling units are connected through gain fibers in sequence, and the several stages of coupling filter units are sequentially connected through The gain fiber is connected, and the last-stage coupling unit is connected with the first-stage coupling filter unit through the gain fiber. The invention can utilize the existing technology and product conditions to overcome the component bandwidth limitation problem faced by the high-bandwidth and ultra-high-bandwidth optical fiber amplifiers, and still maintain the advantages of the all-fiber amplifier without photoelectric conversion, being easy to connect with the optical fiber system, and being easy to install and carry.
Description
Technical Field
The invention belongs to the technical field of optical fiber amplifiers, and relates to an ultrahigh-bandwidth quasi-all optical fiber amplifier.
Background
Amplifiers are an indispensable key component in current optical fiber communication systems. The optical fiber amplifier is a focus of research and application because of its advantages of no need of photoelectric conversion, easy connection with an optical fiber system, and convenient installation and carrying. Among them, the erbium-doped fiber amplifier has excellent performance in the C band, and has been widely used in the present wavelength division multiplexing system.
Bandwidth expansion is a solution to the problem of tight communication capacity in optical fiber communication. Under the condition that a transmission optical fiber line does not need to be laid again, the method can improve the use bandwidth of an optical fiber communication system from less than 30nm to more than 400nm through device upgrading, accordingly, the effective utilization of the whole low-loss wave band is realized, the transmission capacity can be improved by 10 times, and a larger utilization space is provided for further addition space division multiplexing in the future. High bandwidth and ultra-high bandwidth fiber amplifiers are key devices to achieve this idea.
The basic structure of the optical fiber amplifier includes a pump source, a Wavelength Division Multiplexer (WDM) for combining the pump and signal into the next-stage optical fiber, a gain fiber (e.g., erbium-doped fiber, thulium-doped fiber, bismuth-doped fiber, etc.) for providing the gain required for amplification, and an isolator, a filter, etc. used in cooperation.
The high-bandwidth and ultra-high-bandwidth optical fiber amplifier cannot be directly obtained by the translation of the conventional optical fiber amplifier technology at present, and one of the important problems faced by the high-bandwidth and ultra-high-bandwidth optical fiber amplifier is that the key components of the conventional optical fiber amplifier have relatively obvious bandwidth limitation and cannot meet the requirements of the high-bandwidth and ultra-high-bandwidth optical fiber amplifier.
Conventional fiber amplifiers generally employ WDM to combine signals with the pump required for amplification into a gain fiber, and there are two common configurations of WDM devices currently used in fiber amplifiers: the common tapering method WDM is low in price, and the signal bandwidth is only 30-50 nm generally; the filter sheet type WDM is relatively expensive, the signal bandwidth can be increased to 70-100 nm, but the distance from the WDM to the whole band is still large.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides an ultra-high bandwidth quasi-all-fiber amplifier, which still maintains the advantages that the all-fiber amplifier does not need photoelectric conversion, is easy to connect with an optical fiber system and is convenient to install and carry, overcomes the bandwidth limitation of the existing optical fiber device, and can provide a new solution for the research and application of high-bandwidth and ultra-high bandwidth optical fiber amplifiers.
The technical scheme for solving the problems is as follows: an ultra-high bandwidth quasi-all fiber amplifier, characterized in that:
comprises a plurality of stages of coupling units and a plurality of stages of coupling filtering units, wherein the plurality of stages of coupling units are connected through gain fibers in sequence, the plurality of stages of coupling filtering units are connected through the gain fibers in sequence,
the last stage of coupling unit is connected with the first stage of coupling filtering unit through a gain optical fiber.
Further, each stage of coupling unit comprises a coupling assembly, wherein the coupling assembly comprises a transmission end connector support plate, a first concentrator device support and a plurality of first expandable structures;
the first expandable structure comprises a first expandable mirror bracket, a first side connector support plate, a second optical fiber jumper and a first dichroic mirror; a first dichroic mirror is supported and fixed in the first expandable mirror bracket; the first side connector support plate is fixed on the side of the first expandable mirror bracket and used for adjusting and fixing a second optical fiber jumper wire with a movable connector to form an optical fiber access port of the pump;
the plurality of first expandable structures are connected in sequence;
the transmission end connector supporting plate is fixed at the transmission end of the first expandable mirror bracket and used for adjusting and fixing a first optical fiber jumper wire with a movable connector to form an optical fiber access port of a signal;
the first light gathering device bracket is fixed at the output end of the last first expandable mirror bracket and used for supporting and fixing the first light gathering device with the movable connector, gathering the combined light and injecting the gathered light into the connected gain optical fiber through the optical fiber movable connector.
Furthermore, each stage of coupling filtering unit comprises a coupling filtering assembly, and the coupling filtering assembly comprises a second light condensing device bracket, a third light condensing device bracket and a plurality of second expandable structures;
the second extensible structure comprises a second extensible mirror frame, a second dichroic mirror, a second side connector support plate and a third optical fiber jumper, the second extensible mirror frame is used for supporting and fixing the second dichroic mirror, and the second dichroic mirror is connected in a beam splitter mode, which is opposite to the first dichroic mirror in the coupling assembly; the second side connector supporting plate is fixed on the side surface of the mirror bracket and used for adjusting and fixing a third optical fiber jumper wire with a movable connector to form an optical fiber access port of the reverse pump;
the plurality of second expandable structures are connected in sequence;
the second light focusing device bracket is fixed at the input end of the first second expandable mirror bracket and is used for supporting and fixing a second light focusing device with a movable connector; the third light condensing device support is fixed at the output end of the last second expandable mirror bracket and used for supporting and fixing a third light condensing device with a movable connector, the second light condensing device is used for converging reverse pumping passing through the second dichroic mirror and injecting gain optical fibers connected with the second dichroic mirror through the movable connector, meanwhile, signals output by the gain optical fibers are emitted into the second dichroic mirror, and the third light condensing device converges amplified signal light passing through the second dichroic mirror and outputs the converged amplified signal light through the optical fiber movable connector.
Further, the structure of each stage of coupling assembly is identical, partially identical or completely different.
Further, the structure of each stage of coupled filtering component is completely the same, partially the same or completely different.
Further, the first light condensing device, the second light condensing device and the third light condensing device adopt an objective lens with a movable connector.
Further, the first light condensing device, the second light condensing device and the third light condensing device adopt collimating lenses with movable connectors.
The invention has the advantages that:
the structure of the invention can realize the forward pumping, the backward pumping and the bidirectional pumping of the amplifier. The invention can utilize the prior art and product conditions, overcome the problem of element bandwidth limitation of high-bandwidth and ultra-high-bandwidth optical fiber amplifiers, and still keep the advantages that the all-optical fiber amplifier does not need photoelectric conversion, is easy to be connected with an optical fiber system, is convenient to be installed and carried, and the like.
Drawings
Fig. 1 is a schematic structural diagram of an ultra-high bandwidth quasi-all fiber amplifier according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an ultra-high bandwidth quasi-all fiber amplifier according to a second embodiment of the present invention.
Wherein: 1. the optical fiber coupling device comprises a coupling component, 21, a first pumping source, 22, a second pumping source, 3, a first gain optical fiber, 4, a coupling filter component, 5, a first-stage coupling unit, 61, a pumping source group, 72, a second gain optical fiber, 8, a second-stage coupling unit, 11, a first expandable mirror bracket, 12, a transmission end connector support plate, 13, a first side connector support plate, 14, a first condenser bracket, 15, a first dichroic mirror, 16, a first optical fiber jumper, 17, a second optical fiber jumper, 18, a first condenser, 41, a second expandable mirror bracket, 42, a second side connector support plate, 43, a second condenser bracket, 44, a third condenser bracket, 45, a second dichroic mirror, 46, a second condenser, 47, a third condenser, 48 and a third optical fiber jumper.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
The invention provides a quasi-all-fiber amplifier with ultrahigh bandwidth, which still keeps the advantages that the all-fiber amplifier does not need photoelectric conversion, is easy to be connected with an optical fiber system and is convenient to install and carry, overcomes the bandwidth limitation of the existing optical fiber device, and can provide a new solution for the research and application of the optical fiber amplifier with high bandwidth and ultrahigh bandwidth.
The ultrahigh-bandwidth quasi-all-fiber amplifier comprises a plurality of stages of coupling units and a plurality of stages of coupling filtering units, wherein the plurality of stages of coupling units are connected sequentially through gain fibers, the plurality of stages of coupling filtering units are connected sequentially through the gain fibers, and the last stage of coupling unit is connected with the first stage of coupling filtering unit through the gain fibers.
Preferably, said coupling units of each stage comprise a coupling assembly 1, the coupling assembly 1 comprising a transmissive end connector support plate 12, a first concentrator device support 14 and a number of first expandable structures.
Specifically, the first expandable structure includes a first expandable frame 11, a first side connector support plate 13, a second optical fiber jumper 17, and a first dichroic mirror 15; the first dichroic mirror 15 is supported and fixed in the first expandable frame 11; the first side connector support plate 13 is fixed to the side of the first expandable frame 11, and is used for adjusting and fixing the second optical fiber jumper 17 with a movable connector to form an optical fiber access port of the pump. The plurality of first expandable structures are connected in sequence; the transmission end connector support plate 12 is fixed at the transmission end of the first expandable mirror bracket 11 and is used for adjusting and fixing a first optical fiber jumper 16 with a movable connector to form an optical fiber access port of a signal; the first condenser bracket 14 is fixed to the output end of the last first expandable frame 11, and is used to support and fix the first condenser 18 with a movable connector, and the combined light is converged and injected to the connected gain fiber through the fiber movable connector.
Preferably, each stage of coupling filter unit comprises a coupling filter assembly, and the coupling filter assembly comprises a second light focusing device bracket 43, a third light focusing device bracket 44 and a plurality of second expandable structures.
Specifically, the second expandable unit includes a second expandable frame 41, a second dichroic mirror 45, a second side connector support plate 42, and a third optical fiber jumper 48, where the second expandable frame 41 is used to support and fix the second dichroic mirror 45, where the second dichroic mirror 45 is accessed by using a splitter, which is opposite to the first dichroic mirror 15 in the coupling component 1; the second side connector support plate 42 is fixed to the side of the frame 41 and is used to adjust and fix the third optical fiber jumper 48 with a movable connector to form an optical fiber access port of the reverse pump. The plurality of second expandable structures are connected in sequence; a second focusing device holder 43 fixed to the input end of the first second expandable frame 41 for supporting and holding a second focusing device 46 with a movable connector; the third light focusing device support 44 is fixed at the output end of the last second expandable mirror bracket 41 and is used for supporting and fixing a third light focusing device 47 with a movable connector, the second light focusing device 46 is used for converging reverse pumping passing through the second dichroic mirror 45 and injecting the converged reverse pumping into a gain optical fiber connected with the second dichroic mirror through the movable connector, meanwhile, a signal output by the gain optical fiber is emitted into the second dichroic mirror 45, and the third light focusing device 47 converges amplified signal light passing through the second dichroic mirror 45 and outputs the converged amplified signal light through the optical fiber movable connector.
In the ultra-high bandwidth quasi-all-fiber amplifier, the structures of the coupling components of each stage can be completely the same, partially the same or completely different, and the structures of the coupling filtering components of each stage can also be completely the same, partially the same or completely different.
The number of stages of the coupling units and the coupling filtering units can be increased according to actual requirements, the first extensible structures in the coupling units of each stage can be extended according to requirements, and the second extensible structures in the coupling filtering units of each stage can be extended according to requirements.
Preferably, the first, second and third light- gathering devices 18, 46 and 47 adopt objective lenses with movable connectors.
Preferably, the first light-gathering device 18, the second light-gathering device 46 and the third light-gathering device 47 adopt collimating mirrors with movable connectors.
Example one
The ultra-high bandwidth quasi-all-fiber amplifier structure provided by the embodiment of the invention is shown in fig. 1 and comprises a primary coupling unit and a primary coupling filtering unit, wherein the primary coupling unit and the primary coupling filtering unit are respectively provided with only one first expandable structure and one second expandable structure.
Specifically, the amplifier comprises a coupling component 1, a first pump source 21, a second pump source 22, a first gain fiber 3, and a coupling filter component 4
The coupling component 1 is used for combining the signal and the pump and injecting the combined signal and pump into the gain fiber, and provides a fiber interface connected with the signal, the pump and the gain fiber. The coupling component 1 comprises the following parts and functions: the first expandable mirror bracket 11 is used for supporting and fixing the first dichroic mirror 15; the transmission end connector support plate 12 is fixed at the transmission end of the mirror bracket 11 and is used for adjusting and fixing a first optical fiber jumper 16 with a movable connector to form an optical fiber access port of a signal; the first side connector support plate 13 is fixed on the side of the mirror bracket 11 and used for adjusting and fixing a second optical fiber jumper 17 with a movable connector to form an optical fiber access port of a pump; the first light gathering device bracket 14 is fixed at the output end of the lens bracket 11, and is used for supporting and fixing a first light gathering device 18 with a movable connector, gathering the gathered light and injecting the gathered light into the first gain fiber 3 through the movable fiber connector.
The coupling filter assembly 4 is used for separating the amplified signal from the residual pump and providing a backward pump and a fiber interface for signal output, and comprises the following parts and functions: the second expandable frame 41 is used for supporting and fixing the second dichroic mirror 45, where the second dichroic mirror 45 is accessed by a beam splitter, which is opposite to the access of the first dichroic mirror 15 in the coupling assembly; the second side connector support plate 42 is fixed on the side of the mirror bracket 41 and used for adjusting and fixing a third optical fiber jumper 48 with a movable connector to form an optical fiber access port of the reverse pump; the second light focusing device support 43 and the third light focusing device support 44 are respectively fixed at the input end and the output end of the lens bracket 11 and are used for supporting and fixing a second light focusing device 46 and a third light focusing device 47 with movable connectors, the second light focusing device 46 is used for converging reverse pumping passing through the second dichroic mirror 45 and injecting the converged reverse pumping into the first gain optical fiber 3 through the movable connectors, meanwhile, a signal output by the first gain optical fiber 3 is emitted into the second dichroic mirror 45, and the third light focusing device 47 converges amplified signal light passing through the second dichroic mirror 45 and outputs the converged amplified signal light through the optical fiber movable connectors.
Example two
The ultra-high bandwidth quasi-all-fiber amplifier provided by the embodiment of the invention has a structure as shown in fig. 2, and comprises two stages of coupling units and one stage of coupling filtering components.
Specifically, the amplifier comprises a primary coupling unit 5, a pump source group 61, a first gain fiber 3, a second gain fiber 72, a secondary coupling unit 8 and a coupling filter component 4.
The primary coupling unit 5 is used for merging the signal and the pump and injecting the merged signal and pump into the gain fiber, and provides a fiber interface connected with the signal, the pump and the gain fiber, and the fiber interface comprises the following parts and functions: the coupling component 1 of the primary coupling unit 5 has three first extension structures, the primary coupling unit 5 combines the pump light and the input signal input by the pump group 61 and injects the combined pump light and input signal into the first gain fiber 3, the pump group 61 includes three first pump sources 21, then enters the secondary coupling unit 8, combines the pump light input by the first pump source 21 connected with the secondary coupling unit and injects the combined pump light into the second gain fiber 72, wherein the secondary coupling unit 8 is used for combining the signal and the pump and injecting the combined pump light into the gain fiber to provide a fiber interface connected with the signal, the pump and the gain fiber, and the coupling component in the secondary coupling unit 8 has only one first extension structure. The coupling filter assembly 4 is used to separate the amplified signal from the residual pump and provide a backward pump and a fiber interface for signal output.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.
Claims (7)
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| CN202111270361.4A CN113991402B (en) | 2021-10-29 | 2021-10-29 | An ultra-high bandwidth quasi-all-fiber amplifier |
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| CN202111270361.4A CN113991402B (en) | 2021-10-29 | 2021-10-29 | An ultra-high bandwidth quasi-all-fiber amplifier |
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| US20020159138A1 (en) * | 2001-04-30 | 2002-10-31 | Meiyu Zou | Access device for pump source in cascade erbium-doped fiber amplification |
| US6985283B1 (en) * | 1998-06-16 | 2006-01-10 | Xtera Communications, Inc. | Fiber-optic compensation for dispersion, gain tilt, and band pump nonlinearity |
| US20160344153A1 (en) * | 2014-01-22 | 2016-11-24 | B.G. Negev Technologies And Applications Ltd., At Ben Gurion University | Multi-pump-pass fiber based lasers and amplifiers |
| US20170085052A1 (en) * | 2014-04-04 | 2017-03-23 | Advanced Optowave Corporation | Multipass fiber amplifiers |
| CN110112638A (en) * | 2019-03-04 | 2019-08-09 | 电子科技大学 | A high-gain low-noise erbium-doped fiber amplifier device |
| CN111029892A (en) * | 2019-12-29 | 2020-04-17 | 无锡市德科立光电子技术有限公司 | Pump light loop structure of optical fiber amplifier |
| US20210328400A1 (en) * | 2020-04-15 | 2021-10-21 | Cybel, LLC. | Broadband ho-doped optical fiber amplifier |
-
2021
- 2021-10-29 CN CN202111270361.4A patent/CN113991402B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6985283B1 (en) * | 1998-06-16 | 2006-01-10 | Xtera Communications, Inc. | Fiber-optic compensation for dispersion, gain tilt, and band pump nonlinearity |
| US20020159138A1 (en) * | 2001-04-30 | 2002-10-31 | Meiyu Zou | Access device for pump source in cascade erbium-doped fiber amplification |
| US20160344153A1 (en) * | 2014-01-22 | 2016-11-24 | B.G. Negev Technologies And Applications Ltd., At Ben Gurion University | Multi-pump-pass fiber based lasers and amplifiers |
| US20170085052A1 (en) * | 2014-04-04 | 2017-03-23 | Advanced Optowave Corporation | Multipass fiber amplifiers |
| CN110112638A (en) * | 2019-03-04 | 2019-08-09 | 电子科技大学 | A high-gain low-noise erbium-doped fiber amplifier device |
| CN111029892A (en) * | 2019-12-29 | 2020-04-17 | 无锡市德科立光电子技术有限公司 | Pump light loop structure of optical fiber amplifier |
| US20210328400A1 (en) * | 2020-04-15 | 2021-10-21 | Cybel, LLC. | Broadband ho-doped optical fiber amplifier |
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