CN214044325U - High-power optical fiber laser - Google Patents
High-power optical fiber laser Download PDFInfo
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- CN214044325U CN214044325U CN202023159875.6U CN202023159875U CN214044325U CN 214044325 U CN214044325 U CN 214044325U CN 202023159875 U CN202023159875 U CN 202023159875U CN 214044325 U CN214044325 U CN 214044325U
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Abstract
The utility model discloses a high power fiber laser, include: a first integrated fiber optic device module; the laser beam output end of the indicating light laser module is correspondingly connected with the laser beam input end of the first integrated optical fiber device module; each laser beam output end of the first semiconductor laser module is respectively and correspondingly connected with the laser beam input end of the first integrated optical fiber device module; the input end of the gain optical fiber is connected with the laser beam output end of the first integrated optical fiber device module; one laser beam input end of the second integrated optical fiber device module is connected with the output end of the gain optical fiber; and the input end of the output optical cable is connected with the laser beam output end of the second integrated optical fiber device module. The utility model discloses promote power, simplify technology, improve the reliability.
Description
Technical Field
The utility model relates to a fiber laser technical field especially relates to a high power fiber laser.
Background
The high-power optical fiber laser has the advantages of good beam quality, high output power, good stability, compact structure, convenient thermal management and the like, and is widely applied to the fields of industrial processing, military and national defense, scientific research and the like.
At present, the main factor limiting the further increase of the output power of the single-cavity single-mode fiber laser is the nonlinear effect, wherein the Stimulated Raman Scattering (SRS) effect is the most dominant nonlinear effect in the high-power fiber laser. The waveguide structure of the optical fiber enables laser energy to be constrained in a micron-sized optical fiber core, extremely high power is formed in the optical fiber core along with continuous improvement of optical fiber laser power, when the power exceeds a threshold value, photons interact with a medium to cause a nonlinear effect, part of laser is converted into stokes light with long wavelength, the power and the conversion efficiency of signal laser are reduced, moreover, backward transmitted stokes light can damage optical devices in a system, and the stability and the reliability of a high-power optical fiber laser are seriously influenced.
The SRS threshold of the fiber laser is in direct proportion to the mode field area and in inverse proportion to the effective length of the optical fiber, and can be realized by increasing the mode field area and shortening the effective length of the optical fiber. For single mode fiber lasers, increasing the mode field area converts the output lasing mode from single mode to multiple mode, so shortening the effective length of the fiber is a consideration. The utility model discloses an use integrated fiber device, can shorten optical fiber length, reduce the quantity of optical fiber splice point in the resonant cavity simultaneously to play the effect that restraines SRS, promote single mode fiber laser's power.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high power fiber laser to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a high power fiber laser comprising:
a first integrated fiber optic device module having a plurality of laser beam input ends and a laser beam output end;
the laser beam output end of the indicating light laser module is correspondingly connected with the laser beam input end of the first integrated optical fiber device module;
each laser beam output end of the first semiconductor laser module is respectively and correspondingly connected with the laser beam input end of the first integrated optical fiber device module;
the input end of the gain optical fiber is connected with the laser beam output end of the first integrated optical fiber device module;
a second integrated fiber optic device module having at least one laser beam input end and one laser beam output end, one of the laser beam input ends of the second integrated fiber optic device module being connected to the output end of the gain fiber; and
and the input end of the output optical cable is connected with the laser beam output end of the second integrated optical fiber device module.
The utility model discloses a preferred embodiment, first integrated fiber device module includes forward beam combiner, first cladding light stripper and first fiber grating, first cladding light stripper is located on one of them signal input fibre of forward beam combiner, its input conduct the laser beam input of first integrated fiber device module and with the laser beam output of instruction light laser instrument module is connected, the other signal input fibre of forward beam combiner do not regard as the laser beam input of first integrated fiber device module and respectively correspondingly with the laser beam output of first semiconductor laser instrument module is connected, first fiber grating is located on the signal output fibre of forward beam combiner, its output is as the laser beam output of first integrated fiber device module.
In a preferred embodiment of the present invention, the forward combiner is (N +1) × 1, and N is a positive integer greater than or equal to 2.
In a preferred embodiment of the present invention, the first fiber grating is a high-reflectivity fiber grating.
In a preferred embodiment of the present invention, the first semiconductor laser module is composed of a plurality of semiconductor lasers.
In a preferred embodiment of the present invention, the second integrated optical fiber device module includes a second fiber grating and a second cladding light stripper, the input end of the second fiber grating is used as the laser beam input end of the second integrated optical fiber device module and is connected to the output end of the gain fiber, the output end of the second fiber grating is connected to the input end of the second cladding light stripper, and the output end of the second cladding light stripper is used as the laser beam output end of the second integrated optical fiber device module.
In a preferred embodiment of the present invention, the second fiber grating is a low-reflectivity fiber grating.
In a preferred embodiment of the present invention, the semiconductor laser further comprises a second semiconductor laser module, the second integrated fiber device module comprises a reverse beam combiner, a third fiber grating and a third cladding light stripper, the third fiber grating is positioned on one signal input fiber of the reverse beam combiner, the input end of the first integrated optical fiber device module is used as the input end of the laser beam of the second integrated optical fiber device module and is connected with the output end of the gain optical fiber, the other signal input fibers of the reverse beam combiner are respectively used as the laser beam input ends of the second integrated optical fiber device module and are respectively and correspondingly connected with the laser beam output end of the second semiconductor laser module, and the third cladding light stripper is positioned on the signal output fiber of the reverse beam combiner, and the output end of the third cladding light stripper is used as the laser beam output end of the second integrated optical fiber device module.
In a preferred embodiment of the present invention, the reverse beam combiner is (N +1) × 1, and N is a positive integer greater than or equal to 2.
In a preferred embodiment of the present invention, the third fiber grating is a low-reflectivity fiber grating.
In a preferred embodiment of the present invention, the second semiconductor laser module is composed of a plurality of semiconductor lasers.
In a preferred embodiment of the present invention, the optical fiber cable further comprises a cooling system, wherein the cooling system is used for cooling the first integrated optical fiber device module, the indicating light laser module, the first semiconductor laser module, the gain optical fiber, the second integrated optical fiber device module and the output optical cable.
Due to the adoption of the technical scheme, the beneficial effects of the utility model reside in that:
1. because the utility model adopts the first and the second integrated optical fiber device modules, the passive optical fiber length is effectively shortened, the nonlinear effect in the high-power single-mode fiber laser is effectively inhibited, and the power of the single-mode fiber laser is improved;
2. because the utility model adopts the first and the second integrated optical fiber device modules, the number of optical fiber fusion points in the resonant cavity is effectively reduced, and the production process of the optical fiber laser is simplified;
3. because the utility model discloses an integrated fiber device module of first, second has reduced the interference of artificial factor in the fiber laser production process effectively, improves the reliability of fiber laser.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, a high power fiber laser is shown, which employs a bidirectional pumping method and includes an integrated fiber device module 100, an indicating light laser module 200, a semiconductor laser module 300, a gain fiber 400, an integrated fiber device module 500, a semiconductor laser module 600, and an output cable 700.
The integrated fiber optic device module 100 has a plurality of laser beam input ends and a laser beam output end. The laser beam output end of the indicating light laser module 200 is correspondingly connected with the laser beam input end of the integrated fiber device module 100. Each laser beam output end of the semiconductor laser module 300 is correspondingly connected with the laser beam input end of the integrated fiber device module 100. The semiconductor laser module 300 is composed of a plurality of semiconductor lasers 310. The input end of the gain fiber 400 is connected with the laser beam output end of the integrated fiber device module 100. The integrated fiber device module 500 has a plurality of laser beam input ends and a laser beam output end, and one of the laser beam input ends of the integrated fiber device module 500 is connected with the output end of the gain fiber 400. Each laser beam output end of the semiconductor laser module 600 is correspondingly connected with the laser beam input end of the integrated optical fiber device module 500. The semiconductor laser module 600 is composed of a plurality of semiconductor lasers 610. The input end of the output optical cable 600 is connected with the laser beam output end of the integrated fiber optic device module 500.
The integrated fiber optic device module 100 includes a forward combiner 110, a cladding light stripper 120, and a fiber grating 130. The cladding light stripper 120 is located on one of the signal input fibers of the forward beam combiner 110 and may be located in the package structure of the forward beam combiner 110, and its input end serves as the laser beam input end of the integrated fiber optic device module 100 and is connected to the laser beam output end of the indicating light laser module 200. The other signal input fibers of the forward beam combiner 110 are respectively used as the laser beam input ends of the integrated fiber device module 100 and are respectively and correspondingly connected with the laser beam output ends of the semiconductor laser modules 300. The fiber grating 130 is located on the signal output fiber of the forward beam combiner 110, and the output end thereof serves as the laser beam output end of the integrated fiber device module 100.
The forward beam combiner 110 uses 7 beam combining input ends, which are not limited to the number in this embodiment, and they should be set according to actual requirements, and may be set as (N +1) × 1, where N is a positive integer greater than or equal to 2. The fiber grating 130 is preferably a high reflectivity fiber grating.
The integrated fiber optic device module 500 includes a reverse combiner 510, a fiber grating 520, and a cladding light stripper 530. The fiber grating 520 is located on one of the signal input fibers of the backward beam combiner 510 and may be located in the package structure of the backward beam combiner 510, an input end of the fiber grating serves as a laser beam input end of the integrated fiber device module 500 and is connected to an output end of the gain fiber 400, and an output end of the fiber grating is connected to a beam combining input end of the backward beam combiner 510. The other signal input fibers of the inverse beam combiner 510 are respectively used as the laser beam input ends of the integrated fiber device module 500 and are respectively and correspondingly connected with the laser beam output ends of the semiconductor laser modules 600. The cladding light stripper 530 is located on the signal output fiber of the backward combiner 510, and its output end is used as the laser beam output end of the integrated fiber device module 500.
The reverse beam combiner 510 uses 7 beam combining input ends, which are not limited to the number in this embodiment, and the number is set according to actual requirements, and may be set to (N +1) × 1, where N is a positive integer greater than or equal to 2. The fiber grating 520 is preferably a low reflectivity fiber grating.
The utility model discloses still include cooling system (not shown in the figure), cooling system is used for refrigerating parts/devices such as integrated fiber device module 100, instruction light laser instrument module 200, semiconductor laser instrument module 300, gain optic fibre 400, integrated fiber device module 500, semiconductor laser instrument module 600 and output optical cable 700.
Example 2
Referring to fig. 2, a high power fiber laser is shown, which uses a unidirectional pumping method and includes an integrated fiber device module 100a, an indicator light laser module 200a, a semiconductor laser module 300a, a gain fiber 400a, an integrated fiber device module 500a, and an output cable 600 a.
The integrated fiber optic device module 100a has a plurality of laser beam input ends and a laser beam output end. The laser beam output end of the indicating light laser module 200a is correspondingly connected with the laser beam input end of the integrated fiber device module 100 a. Each laser beam output end of the semiconductor laser module 300a is correspondingly connected with the laser beam input end of the integrated optical fiber device module 100 a. The semiconductor laser module 300a is composed of a plurality of semiconductor lasers 310 a. The input end of the gain fiber 400a is connected to the laser beam output end of the integrated fiber device module 100 a. The integrated optical fiber device module 500a has a laser beam input end and a laser beam output end, and the laser beam input end of the integrated optical fiber device module 500a is connected with the output end of the gain optical fiber 400 a. The input end of the output optical cable 600a is connected with the laser beam output end of the integrated fiber optic device module 500 a.
The integrated fiber optic device module 100a includes a forward combiner 110a, a cladding light stripper 120a, and a fiber grating 130 a. The cladding light stripper 120a is located on one of the signal input fibers of the forward beam combiner 110a and may be located in the package structure of the forward beam combiner 110a, and an input end thereof is used as a laser beam input end of the integrated fiber device module 100a and is connected to a laser beam output end of the indicating light laser module 200 a. The other signal input fibers of the forward beam combiner 110a are respectively used as the laser beam input ends of the integrated optical fiber device modules 100a and respectively and correspondingly connected with the laser beam output ends of the semiconductor laser modules 300 a. The fiber grating 130a is located on the signal output fiber of the forward beam combiner 110a, and the output end thereof serves as the laser beam output end of the integrated fiber device module 100 a.
The forward beam combiner 110a uses 7 beam combining input ends, which are not limited to the number in this embodiment, and they should be set according to actual requirements, and may be set as (N +1) × 1, where N is a positive integer greater than or equal to 2. The fiber grating 130a is preferably a high reflectivity fiber grating. The cladding light stripper 120a is located on the signal input fiber of the forward beam combiner 110a and within the package structure of the forward beam combiner 110a, and the fiber grating 130a is located on the signal output fiber of the forward beam combiner 110a and within the package structure of the forward beam combiner 110 a.
The integrated fiber device module 500a includes a fiber grating 510a and a cladding light stripper 520a, wherein an input end of the fiber grating 510a is used as a laser beam input end of the integrated fiber device module 500a and is connected with an output end of the gain fiber 400a, an output end thereof is connected with an input end of the cladding light stripper 520a, and an output end of the cladding light stripper 520a is used as a laser beam output end of the integrated fiber device module 500 a. In this embodiment, the fiber grating 510a is preferably a low reflectivity fiber grating.
The utility model discloses still include cooling system (not shown in the figure), cooling system is used for refrigerating parts/devices such as integrated fiber device module 100a, instruction light laser instrument module 200a, semiconductor laser instrument module 300a, gain optic fibre 400a, integrated fiber device module 500a and output optical cable 600 a.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (12)
1. A high power fiber laser, comprising:
a first integrated fiber optic device module having a plurality of laser beam input ends and a laser beam output end;
the laser beam output end of the indicating light laser module is correspondingly connected with the laser beam input end of the first integrated optical fiber device module;
each laser beam output end of the first semiconductor laser module is respectively and correspondingly connected with the laser beam input end of the first integrated optical fiber device module;
the input end of the gain optical fiber is connected with the laser beam output end of the first integrated optical fiber device module;
a second integrated fiber optic device module having at least one laser beam input end and one laser beam output end, one of the laser beam input ends of the second integrated fiber optic device module being connected to the output end of the gain fiber; and
and the input end of the output optical cable is connected with the laser beam output end of the second integrated optical fiber device module.
2. The high power fiber laser of claim 1, wherein the first integrated fiber device module comprises a forward combiner, a first cladding optical stripper, and a first fiber grating, the first cladding optical stripper is positioned on one of the signal input fibers of the forward beam combiner, the input end of the first integrated optical fiber device module is used as the laser beam input end of the first integrated optical fiber device module and is connected with the laser beam output end of the indicating light laser module, the other signal input fibers of the forward beam combiner are respectively used as the laser beam input ends of the first integrated optical fiber device module and are respectively and correspondingly connected with the laser beam output end of the first semiconductor laser module, the first fiber bragg grating is positioned on a signal output fiber of the forward beam combiner, and the output end of the first fiber bragg grating is used as the laser beam output end of the first integrated fiber device module.
3. The high power fiber laser of claim 2, wherein the forward combiner is (N +1) × 1, N being a positive integer > 2.
4. The high power fiber laser of claim 2, wherein the first fiber grating is a high reflectivity fiber grating.
5. The high power fiber laser of claim 1, wherein the first semiconductor laser module is comprised of a plurality of semiconductor lasers.
6. The high power fiber laser of claim 1, wherein the second integrated fiber device module includes a second fiber grating and a second cladding optical stripper, wherein an input end of the second fiber grating serves as a laser beam input end of the second integrated fiber device module and is connected to an output end of the gain fiber, an output end of the second fiber grating is connected to an input end of the second cladding optical stripper, and an output end of the second cladding optical stripper serves as a laser beam output end of the second integrated fiber device module.
7. The high power fiber laser of claim 6, wherein the second fiber grating is a low reflectivity fiber grating.
8. The high power fiber laser of claim 1, further comprising a second semiconductor laser module, the second integrated fiber device module comprises a reverse beam combiner, a third fiber grating and a third cladding light stripper, the third fiber grating is positioned on one signal input fiber of the reverse beam combiner, the input end of the first integrated optical fiber device module is used as the input end of the laser beam of the second integrated optical fiber device module and is connected with the output end of the gain optical fiber, the other signal input fibers of the reverse beam combiner are respectively used as the laser beam input ends of the second integrated optical fiber device module and are respectively and correspondingly connected with the laser beam output end of the second semiconductor laser module, and the third cladding light stripper is positioned on the signal output fiber of the reverse beam combiner, and the output end of the third cladding light stripper is used as the laser beam output end of the second integrated optical fiber device module.
9. The high power fiber laser of claim 8, wherein the reverse combiner is (N +1) × 1, N being a positive integer > 2.
10. The high power fiber laser of claim 8, wherein the third fiber grating is a low reflectivity fiber grating.
11. The high power fiber laser of claim 8, wherein the second semiconductor laser module is comprised of a plurality of semiconductor lasers.
12. The high power fiber laser of any of claims 1-11, further comprising a cooling system for cooling the first integrated fiber device module, the indicator light laser module, the first semiconductor laser module, the gain fiber, the second integrated fiber device module, and the output cable.
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| CN202023159875.6U CN214044325U (en) | 2020-12-24 | 2020-12-24 | High-power optical fiber laser |
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| CN202023159875.6U CN214044325U (en) | 2020-12-24 | 2020-12-24 | High-power optical fiber laser |
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