TWI637604B - Optical fiber laser transmission system with laser light splitting device - Google Patents

Abstract

The invention relates to a fiber laser transmission system with a laser light splitting device, which mainly receives a light emitted by a laser device by a laser light splitting device and projects the light through an objective lens onto a target; the mine The light-emitting splitting device includes a first beam splitting group, a group of emitters, a group of receivers, and a second beam splitting group. When the first beam splitting group reflects the received light to the group of emitters, the group of emitters transmits The fiber optic cable transmits a set of reflected light to the set of receivers, the set of receivers receive the received reflected light through the second beam splitting group as an output light, and the output light is projected through the objective lens The object; therefore, the present invention can achieve the purpose of increasing the laser transmission distance by the light transmission path provided in the above-described laser light branching device.

Description

Optical fiber laser transmission system with laser light splitting device

The present invention relates to a fiber laser transmission system, and more particularly to a fiber laser transmission system having a laser beam splitting device.

Technology is changing with each passing day. It is quite common to use optical fiber to transmit information in the digital age. Optical fiber communication mainly inputs information to be transmitted to the transmitter at the transmitting end, superimposes or modulates the information onto the carrier as the information signal carrier, and then The modulated carrier is transmitted to the remote receiving end through the transmission medium, so it has many advantages such as large transmission capacity and good confidentiality, so that optical fiber communication has become the most important wired communication method today.

In the prior art, there is an optical transceiver that simultaneously emits light and receives light, and different light is transmitted through different optical fibers. Another example is the "light transceiver device" (previous case) of the invention patent No. I511477, which includes a light source module, a lens module, an optical splitter and a photoelectric conversion module, the lens module including a housing The accommodating portion has three lenses and the optical splitter. When the light source module emits a light beam and passes through one of the lenses into the accommodating portion, the optical splitter guides the light beam into an optical fiber and transmits the light beam to the optical fiber. The photoelectric conversion module.

It can be known from the prior art that different light rays must be transmitted through different optical fibers and use a considerable number of optical splitters, and the structure is complicated, and the volume is increased and the manufacturing cost is also increased. In order to save space, the optical components to be used in the previous case, Most of the lenses are integrated in a small volume, but in order to save space, the complicated structure still loses the design flexibility of the light transmission path, and the transmission distance of the light is limited. Therefore, the prior art still needs to further propose the improvement scheme.

In view of the above-mentioned deficiencies of the prior art, the main object of the present invention is to provide a fiber laser transmission system having a laser light splitting device, which provides a streamlined and flexible design of a light transmission path through a laser light splitting device. Increase the transmission distance of laser light.

In order to achieve the above object, the main technical means adopted by the present invention is that the optical fiber laser transmission system having the laser light splitting device includes: an objective lens; a laser device for emitting a light; and a laser light splitting device. The method includes a first beam splitting group, a group of transmitters, a group of receivers, and a second beam splitting group. The first beam splitting group is connected to the group of transmitters, and the group of transmitters is connected to the group through a fiber optic cable. The set of receivers is coupled to the second beam splitting group, the first beam splitting group is configured to receive light emitted by the laser device; wherein, when the first beam splitting group reflects the received light to the set of emitters The set of transmitters transmits a set of reflected light to the set of receivers, the set of receivers converge the set of reflected light through the second beam splitting group into an output light, and the output light is projected through the objective lens to the On the target.

According to the above configuration, the laser light splitting device receives the light emitted by the laser device, and the light is transmitted through the objective lens to the target object, and in particular, the laser light splitting device transmits the first light splitting device. The group reflects the received light to the set of transmitters, the set of transmitters transmits the set of reflected light to the set of receivers, and then the set of receivers transmits the reflected light of the set through the second beam splitting group to the output The light is transmitted to the target through the objective lens, and the light transmission path provided in the laser light splitting device can achieve the purpose of increasing the laser transmission distance.

10‧‧‧ Laser device

21‧‧‧First Beaming Group

211‧‧‧ first housing

22‧‧‧transmitter

23‧‧‧ Receiver

24‧‧‧Second Beaming Group

241‧‧‧ second housing

25‧‧‧Fiber Cable Set

26‧‧‧First phase adjuster

27‧‧‧Second phase adjuster

30‧‧‧ Objective lens

40‧‧‧ Targets

1 is a system architecture diagram of a preferred embodiment of the present invention.

2 is a system architecture diagram of still another preferred embodiment of the present invention.

3 is a block diagram of a laser light splitting device in accordance with another preferred embodiment of the present invention.

A preferred embodiment of the fiber laser transmission system of the present invention, as shown in FIG. 1, includes a laser device 10, a laser beam splitting device, an objective lens 30, and a target 40, wherein the laser The device 10 is configured to emit a light, and the light emitted by the laser device 10 is received by the laser light splitting device, and then the light is reflected and shunted to be concentrated into an output light, and is projected through the objective lens 30 to the target. On object 40.

The laser beam splitting device comprises a first beam splitting group 21, a group of emitters 22, a group of receivers 23 and a second beam splitting group 24, the first beam splitting group 21 being connected to the group of emitters 22, the group of emitting beams The device 22 is connected to the set of receivers 23 through a fiber optic cable set 25, the set of receivers 23 is connected to the second beam splitter group 24, and the first beam splitter group 21 is configured to receive the light emitted by the laser device 10, when The first beam splitting group 21 reflects the received light to the set of emitters 22, and the set of emitters 22 transmits a set of reflected light through the fiber optic cable set 25 to the set of receivers 23, the set of receivers 23 The set of reflected light is concentrated into an output light through the second beam splitting group 24, and the output light is emitted from the second beam splitting group 24 to the objective lens, and then projected onto the target object 40 through the objective lens 30, by The light transmission path provided by the laser light splitting device increases the laser transmission distance.

In the preferred embodiment, the first beam splitting group 21 includes a first housing 211, a first main reflecting unit M0, and a first reflecting unit M1. The first housing 211 has a light input end. a first light receiving end, and a first receiving space is formed in the first housing 211, the first receiving space is in communication with the light input end and the light output ends; the set of emitters 22 and the set of receivers The number of 23 is two.

The first main reflection unit M0 and the first reflection unit M1 are disposed in parallel in the first accommodating space of the first housing 211, and the first main reflection unit M0, the first reflection The unit M1 is respectively inclined by a first angle so that the first main reflection unit M0 corresponds to the light input end of the first housing 211, and the light emitted by the laser device 10 is received by the first main reflection unit M0.

When the first main reflection unit M0 reflects the received light to one of the light output ends and the first reflection unit M1, the first reflection unit M1 reflects the received light to another light. The output end, thereby causing the first beam splitting group 21 to provide the set of reflected light to the set of emitters 22 through the light output ends, and transmitting the set of reflected light to the set of receivers 23 through the fiber optic cable set 25 And then sent to the second beam splitting group 24 by the set of receivers 23.

In the preferred embodiment, the second beam splitting unit 24 includes a second housing 241, a second main reflecting unit N0, and a second reflecting unit N1. The second housing 241 has two light input ends. A second output space is formed in the second housing 241, and the second receiving space is in communication with the optical input end and the light output end.

The second main reflection unit N0 and the second reflection unit N1 are disposed in parallel in the second accommodating space of the second housing 241, and the second main reflection unit N0 and the second reflection unit N1 is inclined to a second angle, respectively, so that the second main reflection unit N0 and the second reflection unit N1 respectively correspond to the optical input ends of the second housing 241, and the second main reflection unit N0 is The light output end of the second housing 241 should be used.

When the set of receivers 23 sends the received reflected light to the optical input ends of the second housing 241, the second primary reflecting unit N0 and the second secondary reflecting unit N1 concentrate the reflected light of the group For this output light, the output light is emitted from the light output end of the second casing 241 to the objective lens, and then projected onto the target 40 through the objective lens 30.

In the preferred embodiment, the first main reflection unit M0 and the second main reflection unit N0 are respectively configured by a Half Reflector Mirror, which has a function of penetrating half light, reflecting, etc.; The secondary reflection unit M1 and the second reflection unit N1 are respectively configured by a mirror (Reflector Mirror); the set of transmitters 22, the set of receivers 23 can each be composed of a light collimator (Fiber Collimator).

Referring to FIG. 2, the main technical content of the preferred embodiment is substantially the same as that of the previous preferred embodiment, but in the preferred embodiment, The first housing 211 can further have a plurality of light output ends, the second housing 241 can further have a plurality of light input ends, and the number of the set of transmitters 22 and the set of receivers 23 can be respectively a plurality; A plurality of first-time reflection units M1, Mm, and Mn may be further added to the first accommodating space of the first casing 211, and a plurality of the second 241 may be further added to the second accommodating space. Secondary reflection unit N1, Nm, Nn.

In the preferred embodiment, the fiber optic cable set 25 includes a plurality of fiber optic cables. As shown in FIG. 2, when n+1 fiber optic cables (n is a positive integer) are used, the first main reflection unit M0. The second main reflection unit N0 can be a mirror of n/(n+1) reflectivity, that is, when the three optical fiber cables are used, the first main reflection unit M0 is 2/3 of the reflection. The mirror, 2/3 mirror represents 2/3 reflection and 1/3 penetration. Where n is the number of first reflection units, is the number of optical fiber cables connected to the first reflection unit, and is also the number of second reflection units, and the number of first reflection units corresponds to the second reflection unit The number also corresponds to the number of fiber optic cables connected.

2 and 3, the first reflection units M1, Mm, Mn and the second reflection units N1, Nm, Nn, wherein m is between M0~Mn or N0~Nn Set the array number of the mirror, and m is a positive integer of 0 < m ≦ n, the reflectivity of each Mm, Nm is calculated by 1 / (n - m + 1) calculation formula, Mn, Nn is when When n=m, it is a totally reflective mirror.

Referring to FIG. 3, the main technical content of the preferred embodiment is substantially the same as the above preferred embodiments, but in the preferred embodiment, the preferred embodiment of the optical fiber laser transmission system of the present invention is shown in FIG. The first beam splitter 21 further includes a first phase adjuster 26 and a second phase adjuster 27, and the first phase adjuster 26 is disposed on the first reflection unit M1 and one of the light output ends. The second phase adjuster 27 is disposed between the first main reflection unit M0 and the other light output end. The first beam splitter 21 passes through the first phase adjuster 26 and the second phase adjuster. The device 27 can adjust the phase difference of the light waves of different light rays so that the energy does not decay.

In the preferred embodiment, the first phase adjuster 26 and the second phase adjuster 27 are respectively configured by an optical path difference fine tuning module (Optical Path Difference Fine Tuning Module).

Claims (2)

An optical fiber laser transmission system comprising: an objective lens; a laser device for emitting a light; and a laser light splitting device for receiving light emitted by the laser device, and concentrating the light into a light after being reflected and shunted Outputting light and projecting onto the target through the objective lens; wherein the laser light splitting device comprises: a first beam splitting group, receiving light emitted by the laser device, and reflecting the received light into a group a set of emitters coupled to the first beam splitting group and transmitting the set of reflected light; a set of receivers connected to the set of transmitters through a fiber optic cable set, the set of receivers passing through the fiber optic cable The line group receives the set of reflected light; a second beam splitting group is coupled to the set of receivers and receives the set of reflected light, and the second beam splitting group concentrates the set of reflected light into the output light and transmits to the objective lens; A light splitting group includes a first housing, a first main reflecting unit and one or more first reflecting units, the first housing has a light input end, two or more light output ends, and the first shell Forming a body The first accommodating unit is connected to the light input end and the light output end, and the first primary reflecting unit and the first reflecting unit are disposed in the first accommodating space of the first housing. The first main reflection unit corresponds to the light input end of the first housing, and the first main reflection unit receives the light emitted by the laser device; the first main reflection unit reflects the received light to the respective In one of the light output ends, the first reflecting unit, the first reflecting unit reflects the received light to the other light output end; the second beam splitting group includes a second casing and a second a main reflection unit and one or more second reflection units, the second housing has two or more light input ends, a light output end, and the second housing Forming a second accommodating space, the second accommodating space is connected to the light input end and the light output end, and the second main reflecting unit and the second reflecting unit are disposed on the second housing In the second accommodating space, the second main reflection unit and the second reflection unit respectively correspond to the light input ends of the second housing, and the second main reflection unit corresponds to the light of the second housing The set of receivers sends the received reflected light to the optical input ends of the second housing, and the second primary reflecting unit and the second reflecting unit concentrate the reflected light of the group Outputting light; the fiber optic cable set includes a plurality of fiber optic cables. When n+1 fiber optic cables are used (n is a positive integer), the first main reflection unit and the second main reflection unit may be respectively n/ a reflector of (n+1) reflectivity; wherein n is the number of first-time reflection units corresponding to the number of second-time reflection units, and the number of optical fiber cables; the first housing further has a plurality of light outputs The second housing may further have a plurality of optical input terminals, the set of transmitters, and the There are a plurality of receivers respectively; a plurality of first reflection units are further added to the first housing space of the first housing, and a second of the second housing space is further added for the second time. a reflection unit; the first reflection unit and the second reflection units are respectively arranged mirrors, and m is a positive integer of 0<m≦n, where m is each of the first reflection units or The arrangement number of each of the second reflection units is calculated by a calculation formula of 1/(n-m+1) of the reflectance of each sub-reflection unit, and the total reflection unit is totally reflective when n=m. The first beam splitter further includes a plurality of first phase adjusters and a second phase adjuster, wherein the first phase adjusters and the second phase adjusters are respectively disposed in the first beam splitting group and the group Between the transmitters. A laser light splitting device comprising: a first beam splitting group; a set of emitters connected to the first beam splitting group; and a set of receivers connected to the emitter through a fiber optic cable set; a second beam splitting group is connected to the set of receivers; wherein, the first beam splitting group receives a light beam, and reflects the received light into a group of reflected light, and then transmits the second beam splitting group to The output light is emitted by the second beam splitting group to an objective lens; the first beam splitting group includes a first housing, a first main reflecting unit and one or more first reflecting units, the first light reflecting unit A housing has a light input end and two or more light output ends, and a first accommodating space is formed in the first housing, and the first accommodating space is connected to the light input end and the light output ends. The first main reflection unit and the first reflection unit are disposed in the first accommodating space of the first housing, and the first main reflection unit corresponds to the light input end of the first housing, and the first main reflection unit a main reflection unit receives the light emitted by the laser device; the first main reflection unit respectively reflects the received light to one of the light output ends, and the first reflection unit, and the first reflection unit receives The reflected light is reflected back to the other light output; the first The beam splitting group includes a second housing, a second main reflecting unit and one or more second reflecting units, the second housing has two or more light input ends, a light output end, and the second housing Forming a second accommodating space, the second accommodating space is in communication with the optical input end and the light output end, and the second main reflecting unit and the second reflecting unit are disposed in the second housing In the two accommodating spaces, the second main reflection unit and the second reflection unit respectively correspond to the optical input ends of the second housing, and the second main reflection unit corresponds to the light output of the second housing Receiving the received reflected light of the group to the optical input ends of the second casing, the second primary reflecting unit and the second reflecting unit concentrating the reflected light of the group into the output The fiber optic cable set includes a plurality of fiber optic cables. When n+1 fiber optic cables are used (n is a positive integer), the first main reflection unit and the second main reflection unit may be n/( a reflection mirror of n+1); wherein n is the number of first reflection units corresponding to the second The number of secondary reflection units, as well as the number of fiber optic cables; The first housing further has a plurality of light output ends, the second housing further has a plurality of light input ends, and the plurality of sets of the transmitters and the set of receivers are respectively; the first housing a plurality of first reflection units are further added to the accommodating space, and a plurality of second reflection units are further added to the second accommodating space of the second housing; the first reflection units and the second time The reflecting units are respectively arranged mirrors, and m is a positive integer of 0<m≦n, where m is an array number of each of the first reflecting units or each of the second reflecting units, and each secondary reflecting unit The reflectance is calculated by a calculation formula of 1/(n-m+1). When n=m, the secondary reflection unit is a total reflection mirror; the first beam splitter further includes a plurality of first phase adjusters. a second phase adjuster, the first phase adjuster and the second phase adjuster are respectively disposed between the first beam splitting group and the set of emitters.