CN210326479U - High-power intermediate infrared quantum cascade laser based on all-fiber incoherent beam combination - Google Patents
High-power intermediate infrared quantum cascade laser based on all-fiber incoherent beam combination Download PDFInfo
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- CN210326479U CN210326479U CN201921321204.XU CN201921321204U CN210326479U CN 210326479 U CN210326479 U CN 210326479U CN 201921321204 U CN201921321204 U CN 201921321204U CN 210326479 U CN210326479 U CN 210326479U
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Abstract
A high-power intermediate infrared quantum cascade laser based on all-fiber incoherent beam combination. The device comprises an optical fiber coupling quantum cascade laser, an optical fiber beam combiner and a laser output head; wherein, the output optical fibers of the plurality of optical fiber coupling quantum cascade lasers are respectively connected with the plurality of input optical fibers of the optical fiber beam combiner; the output optical fiber of the optical fiber beam combiner is connected with the laser output head. The utility model provides a high output (for example hundred watt levels) can be realized on the one hand to the high power mid infrared band quantum cascade laser based on all-fiber incoherent closes restrainting, and the output that cascades the laser with current mid infrared band quantum improves a level, and laser output has realized optic fibre "flexibility" output on the other hand, and entire system possesses simple structure, advantages such as reliable and stable.
Description
Technical Field
The utility model belongs to the technical field of optic fibre and laser, concretely relates to infrared quantum cascade laser ware in high power based on all-fiber incoherent closes and restraints.
Background
The invention relates to a quantum cascade laser, which is the development with milestone significance in the field of semiconductor lasers and creates a new field of middle and far infrared semiconductor lasers. The semiconductor lasers with the working wavelength in the middle infrared band are very few, and the quantum cascade laser works in the middle infrared region (2.75-25 mu m) and has tunable wavelength. The quantum cascade laser is mainly used for gas detection, infrared countermeasure and terahertz communication at present, and particularly reaches the practical degree basically in a medium-wave infrared 3-5 mu m waveband, but is limited by the structure and material properties of a device, so that the output power of the quantum cascade laser is difficult to further improve. The laser beam combining technology is the most direct method for obtaining high power output, is developed in the field of near infrared semiconductor lasers relatively mature, and can already realize a flexible all-fiber structure. At present, various beam combining technologies (coherent beam combining, spectrum beam combining, waveguide beam combining, polarization beam combining and the like) applied to quantum cascade lasers all depend on various space devices, and the system structure is complex and has a great difference from practicality.
The chinese patent application with the application number of 201811482773.2 and the invention name of "a beam combining system based on a quantum cascade laser" discloses a beam combining scheme of a quantum cascade laser realized based on a polarization beam combining technology, but the present invention is limited to spatial beam combining and is limited in that the current packaging process of the quantum cascade laser cannot obtain high-power (for example, hundreds of watts) mid-infrared laser.
Disclosure of Invention
In order to solve the above problem, an object of the present invention is to provide a high power mid-infrared quantum cascade laser based on all-fiber incoherent beam combination.
In order to achieve the above object, the utility model provides a high power intermediate infrared quantum cascade laser based on all-fiber incoherent beam combination comprises an optical fiber coupling quantum cascade laser, an optical fiber beam combiner and a laser output head; wherein, the output optical fibers of the plurality of optical fiber coupling quantum cascade lasers are respectively connected with the plurality of input optical fibers of the optical fiber beam combiner; the output optical fiber of the optical fiber beam combiner is connected with the laser output head.
The optical fiber coupling quantum cascade laser is a single-tube core intermediate infrared quantum cascade laser, the output optical fiber is a fluoride optical fiber, a sulfide optical fiber or a telluride optical fiber, and the working wavelength is 3-5 mu m.
The optical fiber combiner is an Nx 1 optical fiber combiner, N is 3 Mx (M +1) +1, wherein M is 1,2,3
Where n is the number of input fibers, DinFor the core diameter, NA, of the input fibreinThe numerical aperture of the core of the input optical fiber, DoutCore diameter, NA, of the output fiberoutAll input fibers are fibers of the same specification for the core numerical aperture of the output fiber.
The output optical fiber of the optical fiber coupling quantum cascade laser and the input optical fiber of the laser beam combiner are optical fibers of the same type.
The laser output head is a medium infrared optical fiber end cap, the optical fiber is a fluoride optical fiber, a sulfide optical fiber or a telluride optical fiber, the output end face of the end cap has an inclined angle of more than 8 degrees, and the end face is plated with a high-transmittance film with a wave band of 3-5 mu m.
The utility model provides a high output (for example hundred watt levels) can be realized on the one hand to the high power mid infrared band quantum cascade laser based on all-fiber incoherent closes restrainting, and the output that cascades the laser with current mid infrared band quantum improves a level, and laser output has realized optic fibre "flexibility" output on the other hand, and entire system possesses simple structure, advantages such as reliable and stable.
Drawings
Fig. 1 is the utility model provides a high power mid-infrared band quantum cascade laser structure sketch map based on all-fiber incoherent is restrainted.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly below with reference to the 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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts are within the scope of the present invention.
As shown in fig. 1, the high power intermediate infrared band quantum cascade laser based on all-fiber incoherent beam combination provided by the present invention includes a fiber coupled quantum cascade laser 10, a fiber beam combiner 11 and a laser output head 12; wherein, the output optical fibers 10a of the multiple optical fiber coupling quantum cascade lasers 10 are respectively connected with the multiple input optical fibers 11a of the optical fiber beam combiner 11; the output optical fiber 11b of the optical fiber combiner 11 is connected with the laser output head 12.
The optical fiber coupling quantum cascade laser 10 is a single-tube core intermediate infrared quantum cascade laser, the output optical fiber 10a is a fluoride optical fiber, a sulfide optical fiber or a telluride optical fiber, the diameter of a fiber core is 100 mu m, the diameter of a cladding is 170 mu m, the diameter of a coating layer is 330 mu m, the numerical aperture of the fiber core is 0.27, the working wavelength is 3-5 mu m, and the output power is more than 15W.
The optical fiber combiner 11 is an N × 1 optical fiber combiner, where N is 3 mx (M +1) +1, where M is 1,2,3., and the utility model discloses an optical fiber combiner 11 is a 7 × 1 optical fiber combiner; the input optical fiber 11a and the output optical fiber 11b of the optical fiber combiner 11 are both fluoride optical fibers, sulfide optical fibers or telluride optical fibers, the diameter of the fiber core of the input optical fiber 11a is 100 μm, the diameter of the cladding is 170 μm, the diameter of the coating layer is 330 μm, and the numerical aperture of the fiber core is 0.27; the core diameter of the output optical fiber 11b was 300 μm, the cladding diameter was 370 μm, the coating diameter was 550 μm, and the core numerical aperture was 0.354. By means of the all-fiber incoherent beam combination of the 7 15W fiber-coupled quantum cascade lasers 10, hundred-watt-level power output can be obtained. Output optical fiber 11b and input lightThe fiber 11a satisfies
Where n is the number of input fibers 11a, DinIs the core diameter, NA, of the input optical fiber 11ainThe numerical aperture of the core of the input optical fiber, DoutCore diameter, NA, of the output optical fiber 11boutAll input fibers 11a are of the same specification for the core numerical aperture of the output fiber 11 b.
The utility model discloses mainly utilize Nx 1 optic fibre to close the beam ware and restraint the mid-infrared laser of a plurality of optical fiber coupling quantum cascade laser output to an output optical fiber in, realized that mid-infrared laser's full fiber power closes and restraints, improve a magnitude of power with the output of current mid-infrared band quantum cascade laser.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can make various changes or modifications, and these changes or modifications should be covered by the protection scope of the present invention.
Claims (5)
1. A high-power intermediate infrared quantum cascade laser based on all-fiber incoherent beam combination is characterized in that: the high-power intermediate infrared quantum cascade laser comprises an optical fiber coupling quantum cascade laser (10), an optical fiber beam combiner (11) and a laser output head (12); wherein the output optical fibers (10a) of the plurality of optical fiber coupling quantum cascade lasers (10) are respectively connected with a plurality of input optical fibers (11a) of the optical fiber combiner (11); the output optical fiber (11b) of the optical fiber combiner (11) is connected with the laser output head (12).
2. The high power mid-infrared quantum cascade laser of claim 1, wherein: the optical fiber coupling quantum cascade laser (10) is a single-core intermediate infrared quantum cascade laser, the output optical fiber (10a) is a fluoride optical fiber, a sulfide optical fiber or a telluride optical fiber, and the working wavelength is 3-5 mu m.
3. The high power mid-infrared quantum cascade laser of claim 1, wherein: the optical fiber combiner (11) is an Nx 1 optical fiber combiner, N is 3 Mx (M +1) +1, wherein M is 1,2,3, the input optical fiber (11a) and the output optical fiber (11b) of the optical fiber combiner (11) are fluoride optical fibers, sulfide optical fibers or telluride optical fibers, and the output optical fiber (11b) and the input optical fiber (11a) meet the requirement
Where n is the number of input fibers (11a), DinIs the core diameter, NA, of the input optical fiber (11a)inThe numerical aperture of the core of the input optical fiber, DoutIs the core diameter, NA, of the output optical fiber (11b)outAll input fibers (11a) are fibers of the same specification for the core numerical aperture of the output fiber (11 b).
4. The high power mid-infrared quantum cascade laser of claim 1, wherein: the output optical fiber (10a) of the optical fiber coupling quantum cascade laser (10) and the input optical fiber (11a) of the laser beam combiner (11) are optical fibers of the same type.
5. The high power mid-infrared quantum cascade laser of claim 1, wherein: the laser output head (12) is a medium-infrared optical fiber end cap, the optical fiber is a fluoride optical fiber, a sulfide optical fiber or a telluride optical fiber, the output end face of the end cap has an inclined angle of more than 8 degrees, and the end face is plated with a high-transmittance film with a wave band of 3-5 mu m.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110416876A (en) * | 2019-08-15 | 2019-11-05 | 山东海富光子科技股份有限公司 | Based on INFRARED QUANTUM CASCADE LASERS in the incoherent high power for closing beam of all -fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110416876A (en) * | 2019-08-15 | 2019-11-05 | 山东海富光子科技股份有限公司 | Based on INFRARED QUANTUM CASCADE LASERS in the incoherent high power for closing beam of all -fiber |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: High power mid infrared quantum cascade laser based on all fiber incoherent combining Effective date of registration: 20210517 Granted publication date: 20200414 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: HFB Photonics Co.,Ltd. Registration number: Y2021980003674 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |