CN111999805A - High-power polarization-maintaining beam combiner and manufacturing method thereof - Google Patents
High-power polarization-maintaining beam combiner and manufacturing method thereof Download PDFInfo
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- CN111999805A CN111999805A CN202010733241.2A CN202010733241A CN111999805A CN 111999805 A CN111999805 A CN 111999805A CN 202010733241 A CN202010733241 A CN 202010733241A CN 111999805 A CN111999805 A CN 111999805A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 140
- 239000013307 optical fiber Substances 0.000 claims abstract description 130
- 241000282326 Felis catus Species 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 238000005253 cladding Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 230000010287 polarization Effects 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000007526 fusion splicing Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 12
- 208000025174 PANDAS Diseases 0.000 claims description 7
- 208000021155 Paediatric autoimmune neuropsychiatric disorders associated with streptococcal infection Diseases 0.000 claims description 7
- 235000016496 Panda oleosa Nutrition 0.000 claims description 7
- 238000012163 sequencing technique Methods 0.000 claims description 7
- 240000000220 Panda oleosa Species 0.000 claims 1
- 238000005530 etching Methods 0.000 claims 1
- 230000008033 biological extinction Effects 0.000 abstract description 4
- 230000004927 fusion Effects 0.000 description 7
- 240000004718 Panda Species 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2856—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers formed or shaped by thermal heating means, e.g. splitting, branching and/or combining elements
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
The invention discloses a high-power polarization-maintaining beam combiner and a manufacturing method thereof, wherein the high-power polarization-maintaining beam combiner comprises the following steps: the high-power polarization-maintaining beam combiner comprises a plurality of input optical fibers, a pump and an output optical fiber; the manufacturing method comprises the steps of stripping a 60mm coating of each of an input double-clad signal fiber and a multimode pump fiber to expose the partial cladding; then cutting the bare input polarization-maintaining double-clad signal fiber through the optical fiber to leave a section of optical fiber with the length of 5mm, and welding the optical fiber with the non-polarization-maintaining double-clad signal fiber; corroding the input polarization-maintaining double-clad signal optical fiber with non-polarization maintaining function after welding; rotating the multimode pump fiber and the corroded input fiber counterclockwise by 720 degrees by hand; fixing the rotated optical fiber, and melting to form an optical fiber bundle; and (4) cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber, and then carrying out fusion splicing to complete the manufacture. The invention ensures the stability and the loss of the device well under the condition of not damaging the extinction ratio by rotating and excessively rotating the non-polarization-maintaining optical fiber.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of fiber laser, in particular to a high-power polarization-maintaining beam combiner and a manufacturing method thereof.
[ background of the invention ]
The optical fiber combiner can be divided into two major categories, power combiner and pump combiner, according to the classification of use functions. The power combiner combines multiple single-mode lasers into one optical fiber for output, and is used for improving the output power of the lasers (also called single-mode-multimode fiber combiner). The pump combiner mainly combines multiple pump beams into one optical fiber for output, and is mainly used for improving the pump power (also called multimode-multimode optical fiber combiner). The optical fiber combiner can be divided into two types according to the configuration, namely an N1 optical fiber combiner not including the signal optical fiber and an (N +1) optical fiber combiner including the signal optical fiber.
At present, the manufacturing process of the optical fiber combiner is mainly divided into a rotary tapering method and a sleeving method. The rotary tapering method is to wind a plurality of optical fibers and heat the tapered fibers to fuse the optical fibers together to form an optical fiber bundle. The fiber bundle is cut at the thinnest place and fusion spliced with the output fiber. The ferrule method is to thread a plurality of optical fibers into a quartz ferrule and fuse the ferrule and the optical fibers together by heating and tapering. And then cut at the narrowest part of the optical fiber bundle and welded with the output optical fiber.
However, both methods inevitably require tapered fibers, and the diameter of the fiber is reduced and the divergence angle is increased, which deteriorates the beam quality of the manufactured optical fiber combiner. Meanwhile, the optical fiber winding and the sleeve tapering both need fine manual operation, and have extremely high requirements on operation methods.
In order to solve the problems in the prior art, the invention ensures the stability and the loss of the device well under the condition of not damaging the extinction ratio by rotating and excessively rotating the non-polarization-maintaining optical fiber.
[ summary of the invention ]
In order to solve the above problems, the present invention provides a high power polarization maintaining beam combiner and a manufacturing method thereof.
The technical scheme of the invention is as follows:
1. a high-power polarization-maintaining beam combiner comprises a plurality of input optical fibers, a pump and output optical fibers, wherein the input optical fibers comprise polarization-maintaining double-clad signal optical fibers and multimode pump optical fibers, and the output optical fibers comprise polarization-maintaining double-clad signal optical fibers.
2. The manufacturing method of the high-power polarization-maintaining beam combiner comprises the following steps:
step one, stripping a 60mm coating of an input double-clad signal fiber to expose the cladding of the output fiber, and stripping a 60mm coating of a multimode pump fiber to expose the cladding of the multimode pump fiber;
cutting the bare input polarization-maintaining double-clad signal fiber by a fiber cutter to leave a section of fiber with the length of 5mm, and then welding the fiber with the non-polarization-maintaining double-clad signal fiber to prevent the input polarization-maintaining double-clad signal fiber from being fused to damage panda eyes in the polarization-maintaining fiber;
step three, corroding the input polarization-maintaining double-clad signal fiber which is welded with the non-polarization-maintaining double-clad signal fiber to ensure that the diameter of the output polarization-maintaining double-clad signal fiber is consistent with that of the multimode pump fiber;
fourthly, sequencing the multimode pump optical fiber and the corroded input optical fiber through a clamp on a tapering machine, and rotating the optical fiber counterclockwise by 720 degrees by hand to form a quincunx current situation;
fifthly, fixing the rotated optical fiber, and tapering the optical fiber into an optical fiber bundle through melting equipment;
and sixthly, cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber to enable the cat eye to reach more than 18DB, then carrying out fusion splicing, and finally finishing the manufacture of the high-power polarization-maintaining beam combiner.
Preferably, in the second step, a section of non-polarization-maintaining fiber with a length of 55mm is fused in the middle of the input polarization-maintaining double-clad signal fiber, and the non-polarization-maintaining fiber is the same as the polarization-maintaining double-clad signal fiber.
Preferably, in the third step, the non-polarization-maintaining double-clad signal fiber is corroded by a corrosion clamp; the input polarization-maintaining double-clad signal fiber is corroded to be 150-170 mu m in diameter.
Preferably, in the fifth step, the rotated optical fiber is fixed and tapered into an optical fiber bundle by a fusion tapering machine.
Preferably, in the sixth step, cat's eye centering is performed by the LDS welding equipment so that the index is 18DB or more.
The invention ensures the stability and the loss of the device well under the condition of not damaging the extinction ratio by rotating and excessively rotating the non-polarization-maintaining optical fiber. The advantages are as follows:
1. non-polarization maintaining fiber: on the cat eye which does not damage the polarization maintaining optical fiber, a section of non-polarization maintaining optical fiber is added, and the extinction ratio is completely ensured.
2. And (3) corrosion: because the diameters of the output optical fibers are different, the physical characteristics of the signal optical fiber and the pumping optical fiber are different, and the optical fiber characteristics are well protected.
3. Rotating: many optic fibre avoids having the gap in the middle of the optic fibre, has the light leak temperature height after avoiding the high power, and the loss appears when the butt fusion is big.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A high-power polarization-maintaining beam combiner comprises a plurality of input optical fibers, a pump and output optical fibers, wherein the input optical fibers comprise polarization-maintaining double-clad signal optical fibers and multimode pump optical fibers, and the output optical fibers comprise polarization-maintaining double-clad signal optical fibers.
The manufacturing method of the high-power polarization-maintaining beam combiner comprises the following steps:
step one, stripping a 60mm coating of an input double-clad signal fiber to expose the cladding of the output fiber, and stripping a 60mm coating of a multimode pump fiber to expose the cladding of the multimode pump fiber;
cutting the bare input polarization-maintaining double-clad signal fiber by a fiber cutter to leave a section of fiber with the length of 5mm, and then welding the fiber with the non-polarization-maintaining double-clad signal fiber to prevent the input polarization-maintaining double-clad signal fiber from being fused to damage panda eyes in the polarization-maintaining fiber;
step three, corroding the input polarization-maintaining double-clad signal fiber which is welded with the non-polarization-maintaining double-clad signal fiber to ensure that the diameter of the output polarization-maintaining double-clad signal fiber is consistent with that of the multimode pump fiber;
fourthly, sequencing the multimode pump optical fiber and the corroded input optical fiber through a clamp on a tapering machine, and rotating the optical fiber counterclockwise by 720 degrees by hand to form a plum blossom current situation;
fifthly, fixing the rotated optical fiber, and tapering the optical fiber into an optical fiber bundle through melting equipment;
and sixthly, cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber to enable the cat eye to reach more than 18DB, then carrying out fusion splicing, and finally finishing the manufacture of the high-power polarization-maintaining beam combiner.
Preferably, in the second step, a section of non-polarization-maintaining fiber with a length of 55mm is fused in the middle of the input polarization-maintaining double-clad signal fiber, and the non-polarization-maintaining fiber is the same as the polarization-maintaining double-clad signal fiber.
Preferably, in the third step, the non-polarization-maintaining double-clad signal fiber is corroded by a corrosion clamp; the input polarization-maintaining double-clad signal fiber is corroded to be 150-170 mu m in diameter.
Preferably, in the fifth step, the rotated optical fiber is fixed and tapered into an optical fiber bundle by a fusion tapering machine.
Preferably, in the sixth step, cat's eye centering is performed by the LDS welding equipment so that the index is 18DB or more.
Example 1:
the manufacturing method of the high-power polarization-maintaining beam combiner comprises the following steps:
step one, stripping a 60mm coating of an input double-clad signal fiber to expose the cladding of the output fiber, and stripping a 60mm coating of a multimode pump fiber to expose the cladding of the multimode pump fiber.
And step two, cutting the bare input polarization-maintaining double-clad signal fiber by a fiber cutter to leave a section of fiber with the length of 5mm, and then welding the fiber with the non-polarization-maintaining double-clad signal fiber to prevent the input polarization-maintaining double-clad signal fiber from melting and damaging panda eyes in the polarization-maintaining fiber.
And step three, corroding the input polarization-maintaining double-clad signal fiber which is welded with the non-polarization-maintaining double-clad signal fiber to enable the diameter of the output polarization-maintaining double-clad signal fiber to be consistent with that of the multimode pump fiber.
And fourthly, sequencing the multimode pump optical fiber and the corroded input optical fiber through a clamp on a tapering machine, and rotating the optical fiber counterclockwise by 720 degrees by hand to form the quincunx current situation.
And fifthly, fixing the rotated optical fiber, and tapering the optical fiber into an optical fiber bundle through melting equipment.
And sixthly, cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber to enable the cat eye to reach more than 18DB, then carrying out fusion splicing, and finally finishing the manufacture of the high-power polarization-maintaining beam combiner.
Example 2:
the manufacturing method of the high-power polarization-maintaining beam combiner comprises the following steps:
step one, stripping a 60mm coating of an input double-clad signal fiber to expose the cladding of the output fiber, and stripping a 60mm coating of a multimode pump fiber to expose the cladding of the multimode pump fiber.
Cutting off the bare input polarization-maintaining double-clad signal fiber by using a fiber cutter to leave a section of fiber with the length of 5mm, and welding a section of non-polarization-maintaining fiber with the length of 55mm in the middle of the input polarization-maintaining double-clad signal fiber, wherein the non-polarization-maintaining fiber is the same as the polarization-maintaining double-clad signal fiber; then the optical fiber is welded with a non-polarization-maintaining double-clad signal fiber, so that the input polarization-maintaining double-clad signal fiber is prevented from being fused to damage panda eyes in the polarization-maintaining fiber.
And step three, corroding the input polarization-maintaining double-clad signal fiber with the non-polarization-maintaining function through a corrosion clamp until the diameter of the input polarization-maintaining double-clad signal fiber is 150um, so that the diameter of the output polarization-maintaining double-clad signal fiber is consistent with that of the multimode pump fiber.
And fourthly, sequencing the multimode pump optical fiber and the corroded input optical fiber through a clamp on a tapering machine, and rotating the optical fiber counterclockwise by 720 degrees by hand to form the quincunx current situation.
And fifthly, fixing the rotated optical fiber, and tapering the optical fiber into an optical fiber bundle through a fusion tapering machine.
And sixthly, cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber through LDS welding equipment to enable the cat eye to reach more than 18DB, then carrying out welding, and finally finishing the manufacture of the high-power polarization-maintaining beam combiner.
Example 3:
the manufacturing method of the high-power polarization-maintaining beam combiner comprises the following steps:
step one, stripping a 60mm coating of an input double-clad signal fiber to expose the cladding of the output fiber, and stripping a 60mm coating of a multimode pump fiber to expose the cladding of the multimode pump fiber.
Cutting the bare input polarization-maintaining double-clad signal fiber by an optical fiber cutter to leave a section of optical fiber with the length of 5mm, and welding a section of non-polarization-maintaining optical fiber with the length of 55mm in the middle of the input polarization-maintaining double-clad signal fiber, wherein the non-polarization-maintaining optical fiber is the same as the polarization-maintaining double-clad signal fiber; then the optical fiber is welded with a non-polarization-maintaining double-clad signal fiber, so that the input polarization-maintaining double-clad signal fiber is prevented from being fused to damage panda eyes in the polarization-maintaining fiber.
And step three, corroding the input polarization-maintaining double-clad signal fiber with the non-polarization-maintaining function through a corrosion clamp until the diameter of the input polarization-maintaining double-clad signal fiber is 170um, so that the diameter of the output polarization-maintaining double-clad signal fiber is consistent with that of the multimode pump fiber.
And fourthly, sequencing the multimode pump optical fiber and the corroded input optical fiber through a clamp on a tapering machine, and rotating the optical fiber counterclockwise by 720 degrees by hand to form the quincunx current situation.
And fifthly, fixing the rotated optical fiber, and tapering the optical fiber into an optical fiber bundle through a fusion tapering machine.
And sixthly, cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber through LDS welding equipment to enable the cat eye to reach more than 18DB, then carrying out welding, and finally finishing the manufacture of the high-power polarization-maintaining beam combiner.
Example 4:
the manufacturing method of the high-power polarization-maintaining beam combiner comprises the following steps:
step one, stripping a 60mm coating of an input double-clad signal fiber to expose the cladding of the output fiber, and stripping a 60mm coating of a multimode pump fiber to expose the cladding of the multimode pump fiber.
Cutting the bare input polarization-maintaining double-clad signal fiber by an optical fiber cutter to leave a section of optical fiber with the length of 5mm, and welding a section of non-polarization-maintaining optical fiber with the length of 55mm in the middle of the input polarization-maintaining double-clad signal fiber, wherein the non-polarization-maintaining optical fiber is the same as the polarization-maintaining double-clad signal fiber; then the optical fiber is welded with a non-polarization-maintaining double-clad signal fiber, so that the input polarization-maintaining double-clad signal fiber is prevented from being fused to damage panda eyes in the polarization-maintaining fiber.
And step three, corroding the input polarization-maintaining double-clad signal fiber with the non-polarization-maintaining function through a corrosion clamp until the diameter of the input polarization-maintaining double-clad signal fiber is 160um, so that the diameter of the output polarization-maintaining double-clad signal fiber is consistent with that of the multimode pump fiber.
And fourthly, sequencing the multimode pump optical fiber and the corroded input optical fiber through a clamp on a tapering machine, and rotating the optical fiber counterclockwise by 720 degrees by hand to form the quincunx current situation.
And fifthly, fixing the rotated optical fiber, and tapering the optical fiber into an optical fiber bundle through a fusion tapering machine.
And sixthly, cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber through LDS welding equipment to enable the cat eye to reach more than 18DB, then carrying out welding, and finally finishing the manufacture of the high-power polarization-maintaining beam combiner.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A high-power polarization-maintaining beam combiner is characterized by comprising a plurality of input optical fibers, a pump and output optical fibers, wherein the input optical fibers comprise polarization-maintaining double-clad signal optical fibers and multimode pump optical fibers, and the output optical fibers comprise polarization-maintaining double-clad signal optical fibers.
2. A method for making a high power polarization maintaining beam combiner as recited in claim 1, comprising the steps of:
step one, stripping a 60mm coating of an input double-clad signal fiber to expose the cladding of the output fiber, and stripping a 60mm coating of a multimode pump fiber to expose the cladding of the multimode pump fiber;
cutting the bare input polarization-maintaining double-clad signal fiber by a fiber cutter to leave a section of fiber with the length of 5mm, and then welding the fiber with the non-polarization-maintaining double-clad signal fiber to prevent the input polarization-maintaining double-clad signal fiber from being fused to damage panda eyes in the polarization-maintaining fiber;
step three, corroding the input polarization-maintaining double-clad signal fiber which is welded with the non-polarization-maintaining double-clad signal fiber to ensure that the diameter of the output polarization-maintaining double-clad signal fiber is consistent with that of the multimode pump fiber;
fourthly, sequencing the multimode pump optical fiber and the corroded input optical fiber through a clamp on a tapering machine, and rotating the optical fiber counterclockwise by 720 degrees by hand to form a plum blossom current situation;
fifthly, fixing the rotated optical fiber, and tapering the optical fiber into an optical fiber bundle through melting equipment;
and sixthly, cutting the end face of the optical fiber bundle and carrying out cat eye axis alignment on the output polarization-maintaining double-clad signal optical fiber to enable the cat eye to reach more than 18DB, then carrying out fusion splicing, and finally finishing the manufacture of the high-power polarization-maintaining beam combiner.
3. The method according to claim 2, wherein in the second step, a non-polarization-maintaining fiber with a length of 55mm is fused to the middle of the input polarization-maintaining double-clad signal fiber, and the non-polarization-maintaining fiber is the same as the polarization-maintaining double-clad signal fiber.
4. The method for manufacturing a high power polarization maintaining combiner according to claim 2, wherein in the third step, the non-polarization maintaining double clad signal fiber is etched by an etching fixture.
5. The method as claimed in claim 2, wherein in the third step, the input polarization-maintaining double-clad signal fiber is etched to 150-170 μm in diameter.
6. The method as claimed in claim 2, wherein in the fifth step, the melting device is a tapering machine.
7. The method for manufacturing a high power polarization maintaining beam combiner according to claim 2, wherein in the sixth step, cat eye axis alignment is performed by LDS welding equipment, so that the index is more than 18 DB.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890311A (en) * | 2011-12-30 | 2013-01-23 | 清华大学 | Polarization maintaining fiber pumped coupler and manufacturing method thereof |
| CN103412369A (en) * | 2013-08-21 | 2013-11-27 | 西安中科汇纤光电科技有限公司 | Optical fiber beam combiner and preparation method thereof |
| CN203858386U (en) * | 2014-05-26 | 2014-10-01 | 山东海富光子科技股份有限公司 | (N+1)*1 optical fiber end surface pumping combiner based on optical fiber corrosion |
| CN110441856A (en) * | 2019-09-06 | 2019-11-12 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of polarization maintaining optical fibre pump combiner and its producing device and method |
-
2020
- 2020-07-27 CN CN202010733241.2A patent/CN111999805A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890311A (en) * | 2011-12-30 | 2013-01-23 | 清华大学 | Polarization maintaining fiber pumped coupler and manufacturing method thereof |
| CN103412369A (en) * | 2013-08-21 | 2013-11-27 | 西安中科汇纤光电科技有限公司 | Optical fiber beam combiner and preparation method thereof |
| CN203858386U (en) * | 2014-05-26 | 2014-10-01 | 山东海富光子科技股份有限公司 | (N+1)*1 optical fiber end surface pumping combiner based on optical fiber corrosion |
| CN110441856A (en) * | 2019-09-06 | 2019-11-12 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of polarization maintaining optical fibre pump combiner and its producing device and method |
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