CN113783091B - Optical fiber isolator - Google Patents
Optical fiber isolator Download PDFInfo
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- CN113783091B CN113783091B CN202111061971.3A CN202111061971A CN113783091B CN 113783091 B CN113783091 B CN 113783091B CN 202111061971 A CN202111061971 A CN 202111061971A CN 113783091 B CN113783091 B CN 113783091B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
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Abstract
The invention relates to an optical fiber isolator, which comprises an amplifying module, a pump coupling module and an isolating module; the amplifying module comprises a gain optical fiber and a first collimator; the pump coupling module comprises a first passive optical fiber and a second collimator; the isolation module comprises a first polarization splitting prism, a Faraday rotator, a 1/2 glass slide, a second polarization splitting prism, a third collimator and a second passive optical fiber. The signal light is amplified by the gain fiber under pumping excitation, and the amplified light passes through the isolation module. The fiber isolator integrates the functions of pump reverse coupling, amplification and isolation, and the structure of the fiber isolator reduces the use of passive fibers of the fiber combiner, reduces the fusion points, has small loss and improves the integration level and the stability of the system; meanwhile, the length of the pulse laser transmission optical fiber is reduced, the nonlinear effect is reduced, and the laser amplification characteristic and the amplification structure of the pulse optical fiber are optimized.
Description
Technical Field
The invention belongs to the field of laser devices, and particularly relates to an optical fiber isolator.
Background
In an optical fiber laser oscillation or amplification system, in order to avoid the damage of a device at a front stage or the formation of self-oscillation caused by the reflection of amplified energy, an optical fiber isolator is generally adopted for optical isolation protection, so that the reflection of the energy at a rear stage to the front stage is avoided.
Referring to fig. 1, in the current fiber laser and amplification system, a fiber combiner (cladding pumping) or a wavelength division multiplexer (core pumping) is generally used to amplify the pump light into a gain fiber, and then the gain fiber is isolated and protected by a fiber isolator. However, whether the beam combiner or the wavelength division multiplexer is used as a passive optical coupling device, various losses (such as numerical aperture deformation, end face mismatch, fusion point loss, bending loss, process defects and the like) are inevitably introduced in the manufacturing and using processes, so that the loss of optical power input from each arm is caused, the loss in an optical path is further caused, the system is complex, the integration level is low, and meanwhile, the loss of the system is increased due to a plurality of melting points among optical fiber devices.
Patent application document with application number of CN201910098565.0 and patent name of bi-directional pumping double-cladding optical fiber laser amplifier with SBS inhibiting function discloses a bi-directional pumping double-cladding optical fiber laser amplifier with SBS inhibiting function, which is characterized by comprising: the laser device comprises a laser seed source, an amplifier unit, a first optical fiber combiner, a first double-cladding active optical fiber, a cladding light stripper, a second double-cladding active optical fiber, a second optical fiber combiner, an optical fiber end cap and a pumping source; the laser seed source emits signal light, and the seed light enters the fiber core of the first double-cladding active optical fiber through the amplifier unit and then enters the fiber core of the second double-cladding active optical fiber through the cladding light stripper; the pump light emitted by the pump source is respectively coupled into the cladding layers of the first active optical fiber and the second active optical fiber in a forward and reverse direction through the pump ends of the first optical fiber combiner and the second optical fiber combiner, so that bidirectional pumping is realized; the double-clad active optical fiber absorbs pump light to form particle number inversion and provide gain for signal light; the signal light is amplified, and the amplified signal light is output through the signal end of the second optical fiber combiner and the optical fiber end cap. The disadvantage is that the optical fiber devices in the optical path are more, the system structure is still complex, and both ends of the device are provided with longer tail fibers, so that the transmission distance of the pulse laser is longer, nonlinear effect is easy to cause, and pulse amplification is limited.
Therefore, there is a need for an optical fiber isolator to solve the problems of more optical fiber devices, more melting points, large loss, complex system structure and low integration level.
Disclosure of Invention
In view of the above, the present invention provides an optical fiber isolator, which integrates the functions of pump reverse coupling, amplification and isolation through an amplifying module, a pump coupling module and an isolating module, and reduces the use of an optical fiber combiner and a passive optical fiber compared with the prior art, thereby achieving the beneficial effects of reducing the fusion point, reducing the loss, improving the integration level and the stability of the system, and further solving the problems of more optical fiber devices, more melting points, large loss, complex system structure and low integration level in the prior art.
To achieve the above and other related objects, the present invention provides an optical fiber isolator, which includes an amplifying module, a pump coupling module, and an isolating module for pump coupling, pulse laser amplifying, and isolating protection; the amplifying module comprises a gain optical fiber and a first collimator, and the input end of the first collimator is connected with the gain optical fiber; the pump coupling module comprises a passive optical fiber and a second collimator, and the input end of the second collimator is connected with the passive optical fiber; the isolation module comprises a first polarization beam splitter prism, a Faraday rotator, a 1/2 glass slide, a second polarization beam splitter prism and a third collimator; the first polarization beam splitter prism and the second polarization beam splitter prism are respectively positioned at two ends of the Faraday rotator, and the 1/2 glass slide is positioned between the Faraday rotator and the second polarization beam splitter prism. The first polarization beam splitter prism, the Faraday rotator, the 1/2 glass slide, the second polarization beam splitter prism and the third collimator are sequentially arranged.
Further, the gain optical fiber is connected with the first collimator, and the signal light enters the isolation module through the first polarization splitting prism.
Further, the signal light space passing through the gain fiber directly enters the isolation module.
Further, the pump light passing through the second collimator is reflected after entering the second polarization splitting prism, and then sequentially passes through the 1/2 glass slide, the Faraday rotator and the first polarization splitting prism, and reversely couples to enter the gain fiber, so that the gain fiber is used in the middle of the fiber laser system, is suitable for a polarization-preserving fiber core pumping amplifying mode, and plays roles of coupling pumping, amplifying and isolating.
Further, the pump coupling module further comprises a bicolor lens, the bicolor lens is arranged between the amplifying module and the isolation module, and pump light sequentially passes through the second collimator, the bicolor lens and the first collimator and is reversely coupled into the gain fiber.
Further, the gain optical fiber is connected with the first collimator, and signal light enters the isolation module through the bicolor lens.
Further, the Faraday rotator rotates the polarization direction of reflected light by 45 ° with respect to the incident light.
Further, the 1/2 glass slide rotates the polarization direction of the light into the polarization direction that the second polarization splitting prism can pass through.
Further, the output of the optical fiber isolator is an optical fiber output, the output end of the third collimator is connected with a second passive optical fiber, and the signal light is amplified by the amplifying module under the pumping excitation of the pumping coupling module and is output through the second passive optical fiber connected with the third collimator.
Further, the output of the optical fiber isolator is space output, and the signal light is collimated and output by the third collimator.
Further, the space output is collimated beam expansion output, the output end of the third collimator is connected with an integrated beam expander, and the signal light is output through the beam expander connected with the third collimator, so that the collimated beam expansion output is realized.
Further, the integrated beam expander is disposed inside the integrated fiber isolator.
Furthermore, the gain fiber is a rare earth ion doped fiber, the concentration of rare earth elements doped in the fiber core is unevenly distributed, and the fiber core unevenly doped fiber amplifier can effectively improve the amplification efficiency, inhibit ASE, reduce noise and improve the signal to noise ratio from low to high.
Furthermore, the material for realizing polarization rotation inside the optical fiber isolator adopts TGG crystal.
As described above, the present invention provides an optical fiber isolator integrating the functions of coupling pumping, amplifying and isolating, which has the following beneficial effects:
1. the optical fiber combiner is not adopted, so that various losses introduced by the optical fiber combiner are reduced, the fusion point and the fusion point losses are reduced, the number of optical fiber devices in an optical path is reduced, and the production cost is reduced.
2. The invention integrates the functions of coupling, amplifying and isolating through the amplifying module, the pumping coupling module and the isolating module, has a simplified structure, improves the integration level and the stability of the system, and reduces the loss and the manufacturing cost.
3. The passive optical fiber between devices is reduced, welding through the passive optical fiber is avoided, welding points are reduced, loss is reduced, the length of the pulse laser transmission optical fiber is reduced, nonlinear effect is effectively reduced, and the laser amplification characteristic and the amplification structure of the pulse optical fiber are optimized.
4. The second collimator is connected to the second polarization beam splitter prism, so that the pump light passing through the second collimator is reflected after being incident on the second polarization beam splitter prism, and then sequentially passes through the 1/2 glass slide, the Faraday rotator and the first polarization beam splitter prism, and is reversely coupled into the beneficial optical fiber.
5. Through the bicolor lens of the pump coupling module, the pump light sequentially passes through the second collimator, the bicolor lens and the first collimator and is reversely coupled into the gain fiber.
Drawings
FIG. 1 is a schematic layout of a conventional device for laser pump isolation in the prior art;
FIG. 2 is a schematic diagram of an amplifying module, a pump coupling module and an isolation module according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of another configuration of an amplifying module, a pump coupling module, and an isolating module according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of an internal structure of an optical fiber output connected to a second polarization splitting prism at an output end of a second collimator in a third embodiment of the present invention;
FIG. 5 is a schematic diagram showing the internal structure of an optical fiber output with a second collimator output end connected to a bicolor lens according to a fourth embodiment of the present invention;
fig. 6 is a schematic diagram of the internal structure of the spatial output of the second collimator output end and the second polarization splitting prism in the fifth embodiment of the present invention;
FIG. 7 is a schematic diagram showing the internal structure of the space output of the second collimator output end connected to the bicolor lens in the sixth embodiment of the present invention;
Detailed Description
The following drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
Unless defined otherwise, all directions, such as up, down, left, right, interior, exterior, etc., referred to herein are based on the up, down, left, right, interior, exterior, etc., directions shown in fig. 1 of the present embodiment, and if the specific gesture changes, the directional indication changes accordingly. The terms "plurality," "a plurality," and the like, as used herein, mean two or more, and the terms "first," "second," "third," and the like, are not used to denote any order, quantity, or importance, but rather are used to distinguish one element from another. Furthermore, in various embodiments of the present disclosure, the same or similar reference numerals denote the same or similar components.
In the present invention, unless explicitly specified and limited otherwise, the terms "coupled," "affixed," and the like are to be construed broadly, and for example, "affixed" may be either a fixed connection, a removable connection, or an integral body, unless explicitly specified otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of the claimed invention.
The invention provides an optical fiber isolator which is used as one of pulse optical fiber amplifier integrated components and is applied to an optical fiber laser system and an amplifying system for effectively amplifying pulse laser.
Example 1
As shown in fig. 2, the optical fiber isolator in the present embodiment includes an amplifying module, a pump coupling module, and an isolating module; the amplifying module comprises a gain optical fiber and a collimator 1 which are connected in sequence; the pump coupling module comprises a passive optical fiber 1 and a second collimator which are connected in sequence; the isolation module comprises a first polarization beam splitter prism (PBS 1), a Faraday rotator (Core), a 1/2 glass slide, a second polarization beam splitter prism (PBS 2), a third collimator and a passive optical fiber 2 which are connected in sequence; the pump coupling module is arranged at the rear end of the isolation module and is suitable for a polarization maintaining fiber core pump amplifying mode, and plays roles in reverse coupling, amplifying and isolating of the pump.
Example two
As shown in fig. 3, unlike the embodiment, the pump coupling module in the optical fiber isolator of the present embodiment is disposed at the front end of the isolation module, and is suitable for core pumping and cladding pumping, and the pump light does not pass through the faraday rotator.
Example III
As shown in fig. 4, further, based on the first embodiment, the output mode of the optical fiber isolator in this embodiment is an optical fiber output, that is, an on-line optical fiber isolator, which is generally used in the middle of the optical fiber laser system, and plays roles of coupling pumping, amplifying and isolating; the structure comprises: gain fiber, collimator 1 (first collimator), PBS1 (first polarization splitting prism), core (faraday rotator), 1/2 glass slide, PBS2 (second polarization splitting prism), collimator 2 (second collimator); the gain optical fiber, the collimator 1, the PBS1, the Faraday rotator, the 1/2 glass slide, the PBS2, the collimator 3 and the passive optical fiber 2 are connected in sequence; the passive optical fiber 1 is directly connected with the input end of the collimator 2, the output end of the collimator 2 is connected to the PBS2, and the amplified signal light is collimated by the collimator 3 and then output through the passive optical fiber 2. The first polarization beam splitter prism and the second polarization beam splitter prism are respectively positioned at two ends of the Faraday rotator, and a 1/2 glass slide is positioned between the Faraday rotator and the second polarization beam splitter prism.
It should be noted that, the output end of the collimator 2 in this embodiment is connected to the PBS2, and is used in the middle of the fiber laser system, and is suitable for the polarization maintaining fiber core pumping amplification mode, and plays roles of coupling pumping, amplifying and isolating. The pump light is collimated by the passive optical fiber 1 and the collimator 2, reflected by the PBS2, and then enters the gain optical fiber through the 1/2 glass slide and the Faraday rotator. The signal light passes through the gain fiber and is amplified under pumping excitation. The PBS1 is mainly used for passing signal light and reflecting pump light. The PBS2 is mainly used for enabling signal light with polarization rotation after passing through the Faraday rotator and the 1/2 wave plate to pass through; the pump light is reflected after being collimated by the collimator 2 and incident on the PBS2, and is reversely coupled into the gain fiber through the 1/2 wave plate, the Faraday rotator and the PBS 1. The 1/2 glass slide rotates the polarization direction of the light into the polarization direction that the PBS2 can pass through; the faraday rotator rotates the polarization of the reflected light reflected by the PBS2 by 45 degrees with respect to the incident light.
The collimator makes the laser become collimated light; the passive optical fiber is used for welding other optical fiber devices; furthermore, the collimator is an optical device for converting divergent light into parallel light, belongs to an optical element for input and output of an optical fiber communication optical device, and has a very simple structure, namely, the divergent light emitted from an optical fiber is converted into parallel light (Gaussian beam) through a front similar convex lens, and the collimator functions to enable the coupling of the maximum efficiency of light into a required device, so that the collimator has an important parameter: the insertion loss can reach below 0.15dB in the prior process technology; PBS is an English abbreviation for polarization splitting prism.
By utilizing the technical scheme of the embodiment, when the optical fiber isolator in the embodiment works, signal light is input into an amplifying module and passes through a gain optical fiber, a collimator 1, a PBS1, a Faraday rotator, a 1/2 glass slide and a PBS2; the pump light is input into the pump coupling module, enters the collimator 2, the PBS2, the 1/2 glass slide, the Faraday rotator and the PBS1 through the passive optical fiber 1, and is reversely coupled into the gain optical fiber; the PBS1 reflects the pump light, the signal light passes through the PBS2 and the collimator 3, and the signal light is output by the passive optical fiber 2 of the optical fiber isolator.
The optical fiber isolator in the embodiment carries out coupling, amplifying and isolating treatment on the input signal light and the pump light, outputs the signal light and the pump light through the collimator 3 and the passive optical fiber 2, directly integrates the coupling, amplifying and isolating functions, reduces the use of a conventional wavelength division multiplexing or beam combiner, reduces the use quantity of optical fiber devices in the existing optical path, reduces the optical fiber fusion point, reduces the optical path loss, improves the integration level and the stability of the system, has a simple structure and effectively reduces the manufacturing cost.
Example IV
The third difference between this embodiment and the third embodiment is that, as shown in fig. 5, the pump coupling module in this embodiment further includes a bicolor lens, the bicolor lens is disposed between the amplifying module and the isolation module, and the pump light sequentially passes through the second collimator, the bicolor lens and the first collimator, and is reversely coupled into the gain fiber. The gain optical fiber is connected with the first collimator, and the signal light enters the isolation module through the bicolor lens. Further, a bicolor lens is arranged between the first collimator (collimator 1) and the first polarization splitting prism (PBS 1), and the bicolor lens is connected with the output end of the second collimator (collimator 2).
The bicolor lens is a lens with a reflection and projection function. Dual-color lens action: the pump light is reversely coupled into the collimator 1 of the signal light through the bicolor lens and then into the gain fiber. The pump light is input into the collimator 1 of the signal light through the bicolor lens after being collimated by the passive optical fiber 1 and the collimator 2, then enters the gain optical fiber, the input signal light is amplified under pumping excitation, and is output through the collimator 3 after being isolated and protected by the isolation module and the passive optical fiber 2 is collimated by the collimator 3.
Example five
The difference between the present embodiment and the third and fourth embodiments is that the signal output mode of the optical fiber isolator is different, as shown in fig. 6, and the signal output mode of the optical fiber isolator in the present embodiment is spatial output. Further, the spatial output is a collimated expanded beam output.
It should be noted that, referring to fig. 4 and fig. 6, the spatial output fiber isolator in this embodiment is mostly used in the end of a fiber laser system and an amplifying system, and performs the collimating and beam expanding output directly through the collimator 3 and the beam expander without setting the passive fiber 2, so as to perform the coupling pumping, amplifying and isolating functions. And meanwhile, the use of a conventional wavelength division multiplexing or beam combiner is reduced, the use number of optical fiber devices in the existing optical path is reduced, the optical fiber fusion point is reduced, the optical path loss is reduced, the system integration level and stability are improved, the structure is simple, and the manufacturing cost is effectively reduced.
Example six
The difference between this embodiment and the fifth embodiment is that, as shown in fig. 7, a bicolor lens is disposed between the first collimator (collimator 1) and the first polarization splitting prism (PBS 1) in this embodiment, and the bicolor lens is connected to the output end of the second collimator (collimator 2).
The pump light is reversely coupled into the collimator 1 of the signal light through the collimator 2 through the bicolor lens, and then into the gain fiber. The technical scheme of the embodiment is suitable for fiber core pumping and cladding pumping, and pump light does not pass through a Faraday rotator.
In summary, the optical fiber isolator provided by the invention enables input signal light to be effectively amplified through the optical fiber isolator, pump light to be coupled into the signal optical fiber through the optical fiber isolator, amplification is performed through the source-increasing optical fiber, the devices do not need to be welded through passive optical fibers, the coupling, amplifying and isolating functions are integrated through the optical fiber isolator amplifying module, the pump coupling module and the isolating module, the use of a conventional wavelength division multiplexing or beam combiner is reduced, the use of the pump isolator is reduced, the use quantity of optical fiber devices is reduced, the optical fiber fusion point is reduced, the optical path loss is reduced, the system integration level and stability are improved, the structure is simple, and the manufacturing cost is effectively reduced. Meanwhile, the length of the laser transmission optical fiber can be shortened, the nonlinear effect is effectively reduced, and the laser amplification characteristic and the amplification structure of the pulse optical fiber are optimized. Compared with the prior art, the passive optical fiber of the optical fiber combiner is reduced, so that the beneficial effects of reducing the fusion point, reducing the loss and improving the integration level and the stability of the system are achieved, and the problems of more optical fiber devices, more melting points, large loss, complex system structure and low integration level in the prior art are solved.
Therefore, the optical fiber isolator provided by the invention integrates the functions of the coupler, the active optical fiber and the isolator, namely, the functions of coupling pumping, laser amplification and laser isolation transmission are realized, so that the length of the laser transmission optical fiber is reduced, the number of used devices is reduced, the laser amplification characteristics and the amplification structure of the pulse optical fiber are optimized, the nonlinear effect is reduced, the system integration level and stability are increased, the cost is reduced, and the application and the integration level of the conventional optical fiber isolator are expanded.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The optical fiber isolator is characterized by comprising an amplifying module, a pump coupling module and an isolating module, wherein the amplifying module, the pump coupling module and the isolating module are used for amplifying pulse laser, coupling pump and isolating and protecting, the pump coupling module is arranged at the rear end of the isolating module, and the isolating module is used for isolating and protecting signal light and pump light;
the amplifying module comprises a gain optical fiber and a first collimator;
the pump coupling module comprises a passive optical fiber and a second collimator;
the isolation module comprises a first polarization beam splitter prism, a Faraday rotator, a 1/2 glass slide, a second polarization beam splitter prism and a third collimator; the first polarization beam splitter prism and the second polarization beam splitter prism are respectively positioned at two ends of the Faraday rotator, and the 1/2 glass slide is positioned between the Faraday rotator and the second polarization beam splitter prism;
the gain optical fiber is connected with the first collimator, and the output end of the first collimator is connected with the first polarization splitting prism and enters the isolation module; the passive optical fiber is directly connected with the input end of the second collimator, and the output end of the second collimator is connected with the second polarization splitting prism; the pump light collimated by the second collimator is incident to the second polarization splitting prism and then reflected into the isolation module, and sequentially passes through the second polarization splitting prism, the 1/2 glass slide, the Faraday rotator and the first polarization splitting prism, is reversely coupled into the gain optical fiber, and the amplified signal light is collimated by the third collimator through the isolation module and then output.
2. The fiber optic isolator of claim 1, wherein the signal light space passing through the gain fiber directly enters the isolation module.
3. The fiber isolator of claim 1, wherein the faraday rotator rotates the polarization of reflected light by 45 ° relative to the incident light.
4. The fiber optic isolator of claim 1, wherein the 1/2 glass slide rotates the polarization direction of light to a polarization direction that the second polarization splitting prism can pass.
5. A fibre optic isolator as claimed in any one of claims 1 to 4, wherein the output of the fibre optic isolator is a fibre optic output or a space output.
6. The fiber optic isolator of claim 5, wherein the spatial output is a collimated expanded beam output.
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| CN115513754A (en) * | 2022-09-22 | 2022-12-23 | 杭州奥创光子技术有限公司 | Isolator and laser |
| CN115664518A (en) * | 2022-12-28 | 2023-01-31 | 中国科学院长春光学精密机械与物理研究所 | One-way introduction equipment and one-way introduction system based on space laser transmission |
| CN116316002A (en) * | 2023-01-05 | 2023-06-23 | 上海飞博激光科技股份有限公司 | Pulse fiber laser device integration module, system and method thereof |
| CN118712859A (en) * | 2024-06-13 | 2024-09-27 | 上海飞博激光科技股份有限公司 | Pulse fiber amplifier device integration device, system and method |
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| CN1285663A (en) * | 2000-09-22 | 2001-02-28 | 中国科学院上海光学精密机械研究所 | Multi-beam wave-combining and wave-splitting device for cladding pumping optical fiber amplifier and laser |
| CN108039639A (en) * | 2017-12-05 | 2018-05-15 | 中国科学院西安光学精密机械研究所 | Multi-pass ultrashort pulse laser amplifier based on single crystal optical fiber polarization control |
| CN111562680A (en) * | 2020-06-10 | 2020-08-21 | 福建福晶科技股份有限公司 | Double-stage online optical isolator |
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