CN216413498U - Laser device - Google Patents
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- CN216413498U CN216413498U CN202220040595.3U CN202220040595U CN216413498U CN 216413498 U CN216413498 U CN 216413498U CN 202220040595 U CN202220040595 U CN 202220040595U CN 216413498 U CN216413498 U CN 216413498U
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Abstract
The application discloses a laser, which comprises a seed light source, an optical fiber amplification module and a stimulated Raman suppressor, wherein the seed light source is used for outputting seed light; the input end of the optical fiber amplification module is connected with the seed light source, and the optical fiber amplification module is used for amplifying the seed light output by the seed light source; the stimulated Raman suppressor is connected with the output end of the optical fiber amplification module. The embodiment of the application is connected with the output end of the optical fiber amplification module through the input end of the stimulated Raman suppressor, the stimulated Raman scattering in the positive and negative directions in the light path of the laser can be filtered to the cladding from the fiber core of the laser, the problem of the laser output spectrum Raman is further inhibited, the light beam quality and the output stability of the laser are improved, and the application effect of the optical fiber laser is further improved.
Description
Technical Field
The application relates to the technical field of laser, in particular to a laser.
Background
At present, a Master Oscillator Power-Amplifier (MOPA) fiber laser of a Master Oscillator can amplify a seed light source from 10mW to 300W, has the advantages of high conversion efficiency, low laser threshold, simple structure, convenience in use, small volume, light weight, good heat dissipation effect, long service life and the like, and is applied to many fields.
However, too high peak power of the MOPA fiber laser can cause serious output spectrum raman, which further affects the beam quality of the laser, and finally causes poor application effect of the MOPA fiber laser.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a laser, and aims to solve the problem that the output spectrum Raman is serious due to overhigh peak power of the conventional MOPA fiber laser.
The embodiment of the present application provides a laser, the laser includes:
a seed light source for outputting seed light;
the input end of the optical fiber amplification module is connected with the seed light source, and the optical fiber amplification module is used for amplifying the seed light output by the seed light source;
and the stimulated Raman suppressor is connected with the output end of the optical fiber amplification module.
In some embodiments, the fiber amplification module includes a first amplifier, the first amplifier includes a beam combiner and a plurality of first pump sources, an input end of the beam combiner is connected to the seed light source, the plurality of first pump sources are connected to an input end of the beam combiner, and an output end of the beam combiner is connected to an input end of the stimulated raman suppressor through a first optical fiber.
In some embodiments, the core diameter of the first optical fiber is greater than or equal to 100 μm; the core diameter of the first optical fiber is not more than 400 μm.
In some embodiments, the optical fiber amplification module further includes a second amplifier and a third amplifier, the second amplifier includes a first wavelength division multiplexer and a second pump source, the third amplifier includes a second wavelength division multiplexer and a third pump source, an output end of the second pump source is connected with an input end of the first wavelength division multiplexer, an output end of the third pump source is connected with an input end of the second wavelength division multiplexer, an input end of the first wavelength division multiplexer is connected with the seed light source, an output end of the first wavelength division multiplexer is connected with an input end of the second wavelength division multiplexer through a second optical fiber, and an output end of the second wavelength division multiplexer is connected with an input end of the combiner through a third optical fiber.
In some embodiments, the power of the third pump source is greater than the power of the second pump source.
In some embodiments, the power of the first pump source is greater than the power of the third pump source.
In some embodiments, the core diameter of the first optical fiber is larger than the core diameter of the third optical fiber; the third optical fiber has a core diameter larger than a core diameter of the second optical fiber.
In some embodiments, the laser further comprises an inline isolator, an input of the inline isolator being connected to an output of the second wavelength division multiplexer, an output of the inline isolator being connected to an input of the beam combiner.
In some embodiments, the laser further comprises a mode stripper, an input end of the mode stripper is connected with an output end of the fiber amplification module, and an output end of the mode stripper is connected with an input end of the stimulated raman suppressor.
In some embodiments, the laser further comprises an output isolator, an input of the output isolator being connected to an output of the stimulated raman suppressor.
The laser that this application embodiment provided is connected through the input with stimulated raman inhibitor and the output of optic fibre amplification module, can follow the fiber core filtering of laser to the cladding with the stimulated raman scattering of positive and negative direction in the light path of laser, and then restrain laser output spectrum raman problem, promote the light beam quality and the output stability of laser, and then improve the application effect of fiber laser.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an embodiment of a laser provided in an embodiment of the present application.
A laser 100; a seed light source 110; a fiber amplification module 120; a first amplifier 121; a beam combiner 1211; a first pump source 1212; a first optical fiber 1213; a second amplifier 122; a first wavelength division multiplexer 1221; a second pump source 1222; a second optical fiber 1223; a third amplifier 123; a second wavelength division multiplexer 1231; a third pump source 1232; a third optical fiber 1233; an in-line isolator 130; a stripper 140; a stimulated raman suppressor 150; an output isolator 160.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The embodiment of the application provides a laser. The following are detailed below.
Fig. 1 is a schematic structural diagram of an embodiment of a laser provided in an embodiment of the present application. As shown in fig. 1, the laser 100 includes a Seed light source 110(Seed) and a fiber amplification module 120, the Seed light source 110 being configured to output Seed light. The input end of the optical fiber amplification module 120 is connected to the seed light source 110, and the optical fiber amplification module 120 is configured to amplify the seed light output by the seed light source 110. The seed light source 110 is controlled by the circuit, so that the seed light source 110 can output 1064nm pulse light with specific frequency and pulse width.
It should be noted that the input end of the optical fiber amplification module 120 may be directly connected to the seed light source 110, or may be indirectly connected to the seed light source 110 through other optical elements, and only the optical fiber amplification module 120 needs to amplify the seed light output by the seed light source 110, which is not limited herein.
The laser 100 further includes a stimulated Raman Suppressor 150 (RSS), and the stimulated Raman Suppressor 150 is connected to the output end of the fiber amplification module 120. The Stimulated Raman suppressor 150 has a bidirectional filtering function, and by connecting the input end of the Stimulated Raman suppressor 150 with the output end of the optical fiber amplification module 120, Stimulated Raman Scattering (SRS) in the positive and negative directions in the optical path of the laser 100 can be filtered from the fiber core of the laser 100 into the cladding, so as to suppress the output spectrum Raman problem of the laser 100, improve the beam quality and the output stability of the laser 100, and further improve the application effect of the optical fiber laser 100.
It should be noted that the input end of the stimulated raman suppressor 150 may be directly connected to the output end of the optical fiber amplification module 120, or may be indirectly connected to the output end of the optical fiber amplification module 120 through other optical elements, and it is only necessary that the stimulated raman suppressor 150 be capable of filtering the stimulated raman scattering in the forward and reverse directions in the optical path of the laser 100 from the fiber core of the laser 100 to the cladding, which is not limited herein.
As shown in fig. 1, the fiber amplification module 120 includes a first amplifier 121, and an input end of the first amplifier 121 is connected to the seed light source 110 for amplifying the seed light output by the seed light source 110. The first amplifier 121 includes a Combiner 1211(Combiner) and a plurality of first pump sources 1212(LD5-LD8), an input end of the Combiner 1211 is connected to the seed light source 110, the plurality of first pump sources 1212 are connected to an input end of the Combiner 1211, and an output end of the Combiner 1211 is connected to an input end of the stimulated raman suppressor 150 through a first optical fiber. The seed light can be amplified into laser light of higher power by the first amplifier 121.
Optionally, the core diameter of the first optical fiber 1213 is greater than or equal to 100 μm to enable the first optical fiber 1213 to withstand the high peak power of the laser 100. In addition, the core diameter of the first fiber 1213 is 400 μm or less to avoid unnecessary waste due to an excessively large core diameter of the first fiber 1213. The core diameter of the first optical fiber 1213 may be, but not limited to, 120 μm, 150 μm, 180 μm, or the like. Specifically, the first optical fiber 1213 has a core diameter of 100 μm and a cladding diameter of 400 μm.
Specifically, the beam combiner 1211 of the first amplifier 121 is a (6+1) × 1 beam combiner 1211, and an input end of the (6+1) × 1 beam combiner 1211 is connected to the 6 first pump sources 1212(LD5-LD 8). The first pump source 1212 is 140W pump. The first pump source 1212 had a center wavelength of 915 nm. The first fiber 1213 is a double-clad ytterbium-doped fiber that can withstand higher peak powers.
As shown in fig. 1, the fiber amplification module 120 further includes a second amplifier 122 and a third amplifier 123, an input terminal of the second amplifier 122 is connected to the seed light source 110, an output terminal of the second amplifier 122 is connected to an input terminal of the third amplifier 123, and an output terminal of the third amplifier 123 is connected to an input terminal of the first amplifier 121. Therefore, the optical fiber amplification module 120 sequentially passes through the second amplifier 122, the third amplifier 123 and the first amplifier 121 to amplify the seed light output by the seed light source 110, and has a better amplification effect on the light output by the seed light source 110.
Optionally, the second amplifier 122 includes a first Wavelength Division multiplexer 1221(Wavelength Division Multiplexing, WDM-1) and a second pump source 1222(LD1), an output of the second pump source 1222 of the second amplifier 122 is connected to an input of the first Wavelength Division multiplexer 1221, and an input of the first Wavelength Division multiplexer 1221 is connected to the seed light source 110. The first wavelength division multiplexer 1221 may couple the light output by the second pump source 1222 and the seed light into one optical fiber for output.
The third amplifier 123 includes a second wavelength division multiplexer 1231(WDM-2) and a third pump source 1232(LD2), an output of the third pump source 1232 is connected to an input of the second wavelength division multiplexer 1231, an output of the first wavelength division multiplexer 1221 is connected to an input of the second wavelength division multiplexer 1231 through a second optical fiber 1223, and an output of the second wavelength division multiplexer 1231 is connected to an input of the beam combiner 1211 through a third optical fiber 1233. The second wavelength division multiplexer 1231 may couple the light output by the first wavelength division multiplexer 1221 and the light output by the third pump source 1232 into one optical fiber for output.
Optionally, the power of the third pump source 1232 is greater than the power of the second pump source 1222, so that the second amplifier 122 and the third amplifier 123 of the laser 100 amplify the seed light of the seed light source 110 step by step. Specifically, the third pump source 123240W pumps, having a center wavelength of 915 nm. A second pump source 122210W pumps, having a center wavelength of 915 nm.
Optionally, the power of the first pump source 1212 is greater than the power of the third pump source 1232, so that the second amplifier 122, the third amplifier 123 and the first amplifier of the laser 100 amplify the seed light of the seed light source 110 step by step.
Optionally, the core diameter of the first optical fiber 1213 is larger than the core diameter of the third optical fiber 1233 to reduce the cost of the third optical fiber 1233 while allowing the third optical fiber 1233 to meet the performance requirements of the laser 100. Specifically, the third optical fiber 1233 has a core diameter of 30 μm and a cladding diameter of 250 μm.
In addition, the core diameter of the third optical fiber 1233 is larger than the core diameter of the second optical fiber 1223, so that the second optical fiber 1223 meets the performance requirements of the laser 100, and at the same time, the cost of the second optical fiber 1223 is reduced. Specifically, the second optical fiber 1223 has a core diameter of 10 μm and a cladding diameter of 130 μm.
As shown in fig. 1, the laser 100 further includes a mode stripper 140(CMS), an input of the mode stripper 140 is connected to an output of the fiber amplification module 120, and an output of the mode stripper 140 is connected to an input of the stimulated raman suppressor 150. The fiber stripper 140 is used to strip the cladding light of the core and eliminate the residual pump light in the optical path of the laser 100, thereby improving the performance of the laser 100.
As shown in fig. 1, the laser 100 further includes a pre-line isolation 130(ISO-1), an input end of the pre-line isolation 130 is connected to an output end of the third amplifier 123, and an output end of the pre-line isolation 130 is connected to an input end of the first amplifier 121, so as to ensure unidirectional transmission of the optical path of the laser 100, and to protect the pre-optical path of the laser 100 to a certain extent. Specifically, the input end of the pre-line isolation 130 is connected to the output end of the second wavelength division multiplexer 1231, and the output end of the pre-line isolation 130 is connected to the input end of the beam combiner 1211, so that the optical path between the second wavelength division multiplexer 1231 and the beam combiner 1211 is transmitted in a single direction, and a certain protection effect is exerted on the seed source, the second amplifier 122, and the third amplifier 123.
As shown in fig. 1, laser 100 further includes an output isolator 160(ISO-2), an input of which output isolator 160 is connected to an output of stimulated raman suppressor 150. By connecting the input end of the output isolator 160 with the output end of the stimulated raman suppressor 150, the laser of the laser 100 can be converted from transmission in the optical fiber into spatial light transmission, and meanwhile, the unidirectional transmission of the optical path of the laser 100 is ensured, and the protection effect on the front optical path is achieved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above detailed description is made on a laser provided in the embodiments of the present application, and specific examples are applied in the detailed description to explain the principles and embodiments of the present application, and the description of the above embodiments is only used to help understanding the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A laser, characterized in that the laser comprises:
a seed light source for outputting seed light;
the input end of the optical fiber amplification module is connected with the seed light source, and the optical fiber amplification module is used for amplifying the seed light output by the seed light source;
and the stimulated Raman suppressor is connected with the output end of the optical fiber amplification module.
2. The laser of claim 1, wherein the fiber amplification module comprises a first amplifier, the first amplifier comprises a beam combiner and a plurality of first pump sources, an input end of the beam combiner is connected with the seed light source, the plurality of first pump sources are connected with an input end of the beam combiner, and an output end of the beam combiner is connected with an input end of the stimulated raman suppressor through a first optical fiber.
3. The laser of claim 2, wherein the first optical fiber has a core diameter of 100 μ ι η or greater; the core diameter of the first optical fiber is not more than 400 μm.
4. The laser of claim 2, wherein the fiber amplification module further comprises a second amplifier and a third amplifier, the second amplifier comprises a first wavelength division multiplexer and a second pump source, the third amplifier comprises a second wavelength division multiplexer and a third pump source, an output of the second pump source is connected with an input of the first wavelength division multiplexer, an output of the third pump source is connected with an input of the second wavelength division multiplexer, an input of the first wavelength division multiplexer is connected with the seed light source, an output of the first wavelength division multiplexer is connected with an input of the second wavelength division multiplexer through a second optical fiber, and an output of the second wavelength division multiplexer is connected with an input of the combiner through a third optical fiber.
5. The laser of claim 4, wherein the power of the third pump source is greater than the power of the second pump source.
6. The laser of claim 4, wherein the power of the first pump source is greater than the power of the third pump source.
7. The laser of claim 4, wherein the first optical fiber has a core diameter that is larger than a core diameter of the third optical fiber; the third optical fiber has a core diameter larger than a core diameter of the second optical fiber.
8. The laser of claim 4, further comprising an inline isolator, an input of the inline isolator connected to an output of the second wavelength division multiplexer, an output of the inline isolator connected to an input of the beam combiner.
9. The laser of any one of claims 1 to 8, further comprising a mode stripper, an input of the mode stripper being connected to an output of the fiber amplification module, an output of the mode stripper being connected to an input of the stimulated Raman suppressor.
10. The laser of any one of claims 1 to 8, further comprising an output isolator having an input connected to an output of the stimulated Raman suppressor.
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| CN202220040595.3U CN216413498U (en) | 2022-01-07 | 2022-01-07 | Laser device |
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| CN202220040595.3U CN216413498U (en) | 2022-01-07 | 2022-01-07 | Laser device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115693372A (en) * | 2023-01-05 | 2023-02-03 | 济南邦德激光股份有限公司 | Fiber laser capable of suppressing Raman scattering and method |
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- 2022-01-07 CN CN202220040595.3U patent/CN216413498U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115693372A (en) * | 2023-01-05 | 2023-02-03 | 济南邦德激光股份有限公司 | Fiber laser capable of suppressing Raman scattering and method |
| CN115693372B (en) * | 2023-01-05 | 2023-09-22 | 济南邦德激光股份有限公司 | Fiber laser and method capable of inhibiting Raman scattering |
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