CN209056761U - A kind of laser exporting multiwavelength laser - Google Patents
A kind of laser exporting multiwavelength laser Download PDFInfo
- Publication number
- CN209056761U CN209056761U CN201822108414.2U CN201822108414U CN209056761U CN 209056761 U CN209056761 U CN 209056761U CN 201822108414 U CN201822108414 U CN 201822108414U CN 209056761 U CN209056761 U CN 209056761U
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- fiber
- laser
- fiber coupler
- fibre
- coupler
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Abstract
The utility model discloses a kind of lasers for exporting multiwavelength laser, it include: fiber reflector, right ring, Er-doped fiber, pump light source and wavelength division multiplexer, the fiber reflector and right ring constitute the resonator mirror of laser, the Er-doped fiber is located in the resonator mirror, the pump light source is connect by wavelength division multiplexer with Er-doped fiber, the fiber reflector is connected by one end of optical fiber and Er-doped fiber, the right ring is nested type Sagnac ring structure, the right ring includes: the first fiber coupler, second fiber coupler, polarization maintaining optical fibre and multimode fibre.The resonator mirror that laser is constituted using the right ring and fiber reflector of nested type Sagnac ring structure, using Er-doped fiber as the operation material of laser.It can realize that multiwavelength laser exports at normal temperature.It can be used for field of lasers.
Description
Technical field
The utility model relates to field of laser device technology, in particular to a kind of laser for exporting multiwavelength laser.
Background technique
Multiwavelength Erbium-doped Fiber Laser is in dense wave division multipurpose optical communication system, optical fiber sensing system, spectroscopy, optics
The fields such as instrument test have important application, because there is homogeneously broadening effect at normal temperature in the erbium ion in Er-doped fiber,
So there is intensely mode competition in laser, causing the multiwavelength laser for realizing 1.5 micron wavebands to export, there is larger
Difficulty, realize multiwavelength laser output at normal temperature at present, the technical solution taken has: laser usually uses complicated ring
Shape cavity configuration perhaps complicated Mach-Ze Deer interferometer form or uses liquid nitrogen cooling method etc..
The shortcomings that prior art is that multi-wavelength optical fiber laser often uses annular chamber form, leads to that structure is complicated, loss
Larger, output power is low, and optical s/n ratio is low, and power equalization is poor, is difficult to realize output etc. under room temperature using liquid nitrogen cooling and lacks
It falls into.
Utility model content
The purpose of this utility model is to provide a kind of laser for exporting multiwavelength laser.
The solution that the utility model solves its technical problem is: a kind of laser exporting multiwavelength laser, comprising:
Fiber reflector, right ring, Er-doped fiber, pump light source and wavelength division multiplexer, the fiber reflector and right ring constitute laser
Resonator mirror, the Er-doped fiber is located in the resonator mirror, and the pump light source passes through wavelength division multiplexer and er-doped light
Fibre connection, the fiber reflector are connected by one end of optical fiber and Er-doped fiber, and the right ring is nested type Sagnac-ring
Structure, the right ring include: the first fiber coupler, the second fiber coupler, polarization maintaining optical fibre and multimode fibre, first light
Fine coupler, polarization maintaining optical fibre and the second fiber coupler are sequentially connected in series by single mode optical fiber surrounds ring-type, the first optical fiber coupling
Clutch and the second fiber coupler are the fiber coupler of 1 × 2 type, and the third end of first fiber coupler passes through single mode
The connection of one end of optical fiber and polarization maintaining optical fibre, the other end of the polarization maintaining optical fibre pass through single mode optical fiber and the second fiber coupler the
The first end of the connection of two ends, second fiber coupler is connect by single mode optical fiber with the first end of the first fiber coupler,
The second end of first fiber coupler is connected by one end of single mode optical fiber and multimode fibre, the multimode fibre it is another
End is connect by single mode optical fiber with the third end of the second fiber coupler, the first end and the second light of first fiber coupler
Single mode optical fiber between the first end of fine coupler is connected by the other end of third fiber coupler and Er-doped fiber, and described the
Three fiber couplers are equipped with output port, and the laser that optical fiber laser generates can be exported from the output port.
Further, the third fiber coupler is 2 × 2 type fiber couplers, the power of the third fiber coupler
Splitting ratio is 50:50, and the third end of the third fiber coupler, the 4th light pass through single mode optical fiber and the first fiber coupling respectively
The first end of device, the second fiber coupler, the first end of the third fiber coupler and the other end of Er-doped fiber connect, institute
State the laser that the second end output optical fibre laser of third fiber coupler generates.
Further, the capable of emitting pump light of the pump light source, the Er-doped fiber is to the central wavelength of the pump light
Absorption coefficient >=27dB/m.
Further, first is serially connected between the third end of first fiber coupler and one end of the polarization maintaining optical fibre to squeeze
Pressure type Polarization Controller.
Further, second is serially connected between the second end of first fiber coupler and one end of the multimode fibre to squeeze
Pressure type Polarization Controller.
Further, the pump light source is semiconductor laser.
The beneficial effects of the utility model are: the right ring and fiber reflector using nested type Sagnac ring structure are constituted
The resonator mirror of laser, using Er-doped fiber as the operation material of laser.It can realize that at normal temperature multiwavelength laser is defeated
Out.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His design scheme and attached drawing.
Fig. 1 is the structural schematic diagram of optical fiber laser.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation
It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field
Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection
It encloses.In addition, all connection/connection relationships being previously mentioned in text, not singly refer to that component directly connects, and referring to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, Lai Zucheng more preferably coupling structure.Each technology in the invention is special
Sign, can be with combination of interactions under the premise of not conflicting conflict.
Embodiment 1, with reference to Fig. 1, a kind of laser exporting multiwavelength laser, comprising: fiber reflector 100, right ring
200, Er-doped fiber 300, pump light source 400 and wavelength division multiplexer 500, the fiber reflector 100 constitute laser with right ring 200
The resonator mirror of device, the Er-doped fiber 300 are located in the resonator mirror, and the pump light source 400 passes through wavelength division multiplexer
500 connect with Er-doped fiber 300, and the fiber reflector 100 is connect by optical fiber with one end of Er-doped fiber 300, the right side
Ring 200 is nested type Sagnac ring structure, and the right ring 200 includes: the first fiber coupler 210, the second fiber coupler
220, polarization maintaining optical fibre 230 and multimode fibre 240, first fiber coupler 210, polarization maintaining optical fibre 230 and the second fiber coupling
Device 220 is sequentially connected in series by single mode optical fiber surrounds ring-type, and first fiber coupler 210 and the second fiber coupler 220 are
Third end for the fiber coupler of 1 × 2 type, first fiber coupler 210 passes through single mode optical fiber and polarization maintaining optical fibre 230
The other end of one end connection, the polarization maintaining optical fibre 230 is connect by single mode optical fiber with the second end of the second fiber coupler 220,
The first end of second fiber coupler 220 is connect by single mode optical fiber with the first end of the first fiber coupler 210, described
The second end of first fiber coupler 210 is connect by single mode optical fiber with one end of multimode fibre 240, the multimode fibre 240
The other end connect with the third end of the second fiber coupler 220 by single mode optical fiber, the of first fiber coupler 210
Single mode optical fiber between one end and the first end of the second fiber coupler 220 passes through third fiber coupler 600 and Er-doped fiber
300 other end connection, the third fiber coupler 600 are equipped with output port, and the laser that optical fiber laser generates can be from institute
State output port output.
The third fiber coupler 600 is 2 × 2 type fiber couplers, the power point of the third fiber coupler 600
Light ratio is 50:50, and the third end of the third fiber coupler 600, the 4th light pass through single mode optical fiber and the first optical fiber coupling respectively
The first end of clutch 210, the second fiber coupler 220, the first end and Er-doped fiber 300 of the third fiber coupler 600
Other end connection, the second end of the third fiber coupler 600 is used as output port, with the generation of output optical fibre laser
Laser.
When the work of this optical fiber laser, it is the semiconductor laser of 980nm as light that the present embodiment, which uses central wavelength,
The pump light source 400 of fibre laser, central wavelength are that the pump light of 980nm is coupled into Er-doped fiber from wavelength division multiplexer 500
In 300, wherein the length for the Er-doped fiber 300 that the present embodiment uses is 4 meters, arrives 970nm with 0.25 numerical aperture, 870
Cutoff wavelength.Pump light makes erbium ion that radiation transistion occur, and carries out spontaneous radiation, generates the spontaneous amplification of light, part light
Into right ring 200, right ring 200 is the Sagnac-ring of a nested type, after the feedback of right ring 200, optical transport to left end
Fiber reflector 100 on, left and right ends are respectively formed the resonator mirror of laser, carry out continuous light amplification to light.Specifically
Ground, in right ring 200, this branch of polarization maintaining optical fibre 230 constitutes a comb filter, this branch shape of multimode fibre 240
At another comb filter, the two carries out frequency-selecting to light jointly, and fiber reflector 100 is similar to a total reflective mirror, right
The light of all wavelengths is fed back and generates multiwavelength laser.The multiwavelength laser of generation is finally from third fiber coupler 600
Output port output.By test, it is 4 waves respectively that this optical fiber laser, which can produce metastable 4 kinds of wavelength output,
Length, 3 wavelength, 2 wavelength and 1 wavelength, share 10 kinds of different excitation output modes, under room temperature, the power and wave of multiwavelength laser
Length realizes preferable stabilization.
The application constitutes the humorous of laser using the right ring 200 and fiber reflector 100 of nested type Sagnac ring structure
Vibration hysteroscope, using Er-doped fiber 300 as the operation material of laser.It can realize that multiwavelength laser exports at normal temperature.
As optimization, the capable of emitting pump light of the pump light source 400, the Er-doped fiber 300 is in the pump light
Long absorption coefficient >=the 27dB/m of cardiac wave.Be conducive to shorten the resonant cavity of laser using the Er-doped fiber 300 of high absorption coefficient
The chamber degree of mirror improves pumping efficiency, generates higher power output.
As optimization, concatenated between the third end of first fiber coupler 210 and one end of the polarization maintaining optical fibre 230
There are the first squash type Polarization Controller 231, the second end of first fiber coupler 210 and the one of the multimode fibre 240
The second squash type Polarization Controller 232 is serially connected between end.It is adjusted in resonator mirror using squash type Polarization Controller and transmits light
Polarization state, facilitate change different wavelengths of light gain and loss.
The better embodiment of the utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Type or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (6)
1. a kind of laser for exporting multiwavelength laser characterized by comprising fiber reflector, right ring, Er-doped fiber, pump
Pu light source and wavelength division multiplexer, the fiber reflector and right ring constitute the resonator mirror of laser, and the Er-doped fiber is located at
In the resonator mirror, the pump light source is connect by wavelength division multiplexer with Er-doped fiber, and the fiber reflector passes through light
Fibre is connect with one end of Er-doped fiber, and the right ring is nested type Sagnac ring structure, and the right ring includes: the first optical fiber coupling
Clutch, the second fiber coupler, polarization maintaining optical fibre and multimode fibre, first fiber coupler, polarization maintaining optical fibre and the second optical fiber
Coupler is sequentially connected in series by single mode optical fiber surrounds ring-type, and first fiber coupler and the second fiber coupler are 1 × 2
The third end of the fiber coupler of type, first fiber coupler is connected by one end of single mode optical fiber and polarization maintaining optical fibre, institute
The other end for stating polarization maintaining optical fibre is connect by single mode optical fiber with the second end of the second fiber coupler, second fiber coupler
First end connect with the first end of the first fiber coupler by single mode optical fiber, the second end of first fiber coupler is led to
The one end for crossing single mode optical fiber and multimode fibre connects, and the other end of the multimode fibre passes through single mode optical fiber and the second fiber coupling
The third end of device connects, the single-mode optics between the first end of first fiber coupler and the first end of the second fiber coupler
Fibre is connected by the other end of third fiber coupler and Er-doped fiber, and the third fiber coupler is equipped with output port, light
The laser that fibre laser generates can be exported from the output port.
2. a kind of laser for exporting multiwavelength laser according to claim 1, which is characterized in that the third optical fiber coupling
Clutch is 2 × 2 type fiber couplers, and the power splitting ratio of the third fiber coupler is 50:50, the third fiber coupling
The third end of device, the 4th light pass through the first end of single mode optical fiber and the first fiber coupler, the second fiber coupler respectively, described
The first end of third fiber coupler and the other end of Er-doped fiber connect, the second end output light of the third fiber coupler
The laser that fibre laser generates.
3. a kind of laser for exporting multiwavelength laser according to claim 2, which is characterized in that the pump light source can
Issue pump light, absorption coefficient >=27dB/m of the Er-doped fiber to the central wavelength of the pump light.
4. a kind of laser for exporting multiwavelength laser according to claim 3, which is characterized in that the first optical fiber coupling
The first squash type Polarization Controller is serially connected between the third end of clutch and one end of the polarization maintaining optical fibre.
5. a kind of laser for exporting multiwavelength laser according to claim 4, which is characterized in that the first optical fiber coupling
The second squash type Polarization Controller is serially connected between the second end of clutch and one end of the multimode fibre.
6. a kind of laser for exporting multiwavelength laser according to claim 1-5, which is characterized in that the pump
Pu light source is semiconductor laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822108414.2U CN209056761U (en) | 2018-12-13 | 2018-12-13 | A kind of laser exporting multiwavelength laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822108414.2U CN209056761U (en) | 2018-12-13 | 2018-12-13 | A kind of laser exporting multiwavelength laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209056761U true CN209056761U (en) | 2019-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822108414.2U Expired - Fee Related CN209056761U (en) | 2018-12-13 | 2018-12-13 | A kind of laser exporting multiwavelength laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209056761U (en) |
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2018
- 2018-12-13 CN CN201822108414.2U patent/CN209056761U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190702 Termination date: 20201213 |
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