Laser system and fiber laser

Abstract

The utility model provides a laser system and a fiber laser, comprising a seed source and one or more cascaded power amplification structures, the seed source comprises a first pumping source module, and the power amplification structure comprises a second pumping source module; the first pumping source module and the second pumping source module are connected in series to form a pumping source structure; the laser further comprises a power module, the output end of the power module is connected with the input end of the pumping source structure, and the input end of the power module is connected with the output end of the pumping source structure. That is to say, the laser system can ensure that the laser can work stably.

Description

Technical Field

[0001] The present application belongs to the field of laser technology, and more specifically, relates to a laser system and a fiber laser. Background Art

[0002] Lasers all include a seed source and one or more cascaded power amplification structures for amplifying the signal output by the seed source. Among them, the seed source includes a first pump source and a first resonant cavity, and the power amplification structure includes a second pump source and a second resonant cavity. When amplifying the laser power through the power amplification structure, the timing control of the seed source and the power amplification structure is very important. When emitting light, the light emitting time of the power amplification structure needs to be no earlier than the light emitting time of the seed source; when turning off the light, the light turning off time of the power amplification structure should not be later than the light turning off time of the seed source. During operation, if the control signal processing circuit of the seed source in the main control system fails, or the control timing is abnormal due to the asynchronous power supply voltage during power failure, or the control timing may be abnormal in the case of strong interference, the occurrence of the above situations will cause the failure of the entire optical path, and even cause the pump source to short-circuit and burn. Utility Model Content

[0003] The present application provides a laser system, and the control system has high stability.

[0004] The technical solution adopted in the present application is a laser system, comprising a seed source and one or more cascaded power amplification structures, wherein the seed source comprises a first pump source module, and the power amplification structure comprises a second pump source module;

[0005] The first pump source module and the second pump source module are connected in series to form a pump source structure; and

[0006] The laser further comprises a power supply module, the output end of the power supply module is connected to the input end of the pump source structure, and the input end of the power supply module is connected to the output end of the pump source structure.

[0007] That is to say, in the present application, the first pump source module of the seed source and the second pump source module of the power amplification structure are connected in series to form a pump source structure, and then connected to the pump source structure through the power module. In this way, when the power module generates a driving power supply, the first pump source module and the second pump source module can be turned on synchronously, which ensures that the seed source and the power amplification structure can emit light synchronously. This method avoids the disorder of the light emission sequence of the seed source and the power amplification structure to ensure that the laser can work stably.

[0008] Optionally, the first pump source module includes a plurality of first pump sources, and the plurality of first pump sources are connected in series in sequence.

[0009] Optionally, the second pump source module includes a plurality of second pump sources, and the plurality of second pump sources are connected in series in sequence.

[0010] Optionally, the power supply module includes a constant voltage source module and a constant current source module, the output end of the constant voltage source module is connected to the input end of the constant current source module, the output end of the constant current source module is connected to the input end of the pump source structure, and the input end of the constant current source module is connected to the output end of the pump source structure.

[0011] A laser system comprises a seed source and one or more cascaded power amplification structures, wherein the seed source comprises a plurality of first pump sources, and each of the power amplification structures comprises a plurality of second pump sources;

[0012] The plurality of first pump sources are divided into a plurality of groups of first pump source modules, each group of the first pump source modules respectively includes a preset number of first pump sources, and the first pump sources in each group of the first pump source modules are sequentially connected in series;

[0013] The plurality of second pump sources are divided into a plurality of second pump source modules, each of which comprises a preset number of second pump sources, and the second pump sources in each of which are connected in series in sequence;

[0014] Each group of the first pump source modules is connected in series with one or more groups of the second pump source modules to form a pump source structure, while ensuring that each group of the second pump source modules is connected in series with the first pump source module; and

[0015] The laser also includes a power supply module, the output end of the power supply module is respectively connected to the input end of each of the pump source structures, and the input end of the power supply module is respectively connected to the output end of each of the pump source structures.

[0016] Optionally, in each of the pump source structures, a ratio of the number of the first pump sources to the number of the second pump sources is within a preset ratio range.

[0017] Optionally, in each of the pump source structures, a ratio of the number of the first pump sources to the number of the second pump sources is in a range of 1:3 to 1:15.

[0018] Optionally, the ratio of the number of the first pump sources to the number of the second pump sources in each of the pump source structures is the same.

[0019] Optionally, the number of first pump sources in each of the pump source structures is the same, and the number of second pump sources in each of the pump source structures is the same.

[0020] Optionally, the number of groups of the first pump source modules is the same as the number of groups of the second pump source modules.

[0021] Optionally, the second pump source in each of the power amplification structures is divided into a plurality of second pump source modules, and the number of the second pump source modules is not less than the number of the first pump source module modules;

[0022] The number of the second pump source modules in each of the power amplification structures is the same;

[0023] Each group of the first pump source modules is connected in series with at least one group of the second pump source modules in each of the power amplification structures to form a pump source structure.

[0024] Optionally, the number of the second pump source modules in each of the power amplification structures is the same as the number of the first pump source modules.

[0025] Optionally, the number of first pump sources in each group of the first pump source modules is the same;

[0026] The number of the second pump sources in each group of the second pump source modules in each of the power amplification structures is the same.

[0027] Optionally, the power supply module includes a constant voltage source module and a constant current source module, and the number of the constant current source modules is the same as the number of the pump source structures;

[0028] The input end and the output end of each of the pump source structures are respectively connected to one of the constant current source modules;

[0029] The output end of the constant voltage source module is connected to the input end of each constant current source module respectively.

[0030] A fiber laser comprises a seed source and one or more cascaded power amplification structures;

[0031] The seed source comprises a first pump source module, a first beam combiner, a high-reflection grating, a first gain fiber and a low-reflection grating which are optically connected in sequence;

[0032] The power amplification structure includes a second gain fiber connected in an optical path, a second beam combiner, and a second pump source module connected to the second beam combiner, and the second gain fiber is connected to the low-reflection grating; wherein,

[0033] The first pump source module and the second pump source module are connected using the connection method in the laser system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 This is a topological diagram of the optical path of the fiber laser in the embodiment of the present application;

[0036] Figure 2 This is one of the circuit schematic diagrams of the laser system in the embodiment of the present application;

[0037] Figure 3 This is the second circuit schematic diagram of the laser system in the embodiment of the present application;

[0038] Figure 4 This is the third circuit schematic diagram of the laser system in the embodiment of the present application.

[0039] Reference numerals

[0040] 100, seed source; 110, first pump source module; 111, first pump source; 120, first beam combiner; 130, high-reflection grating; 140, first gain fiber; 150, low-reflection grating;

[0041] 200, power amplification structure; 210, second gain fiber; 220, second beam combiner; 230, second pump source module; 231, second pump source. Specific embodiments

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It should be noted that when a metastructure is referred to as being "fixed to" or "set on" another metastructure, it can be directly on the other metastructure or indirectly on the other metastructure. When a metastructure is referred to as being "connected to" another metastructure, it can be directly connected to the other metastructure or indirectly connected to the other metastructure.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of some applications, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] The laser generally includes a seed source and one or more cascaded power amplification structures for amplifying the signal output by the seed source. However, during operation, the control timing requirements for the seed source and the power amplification structure in the laser are very high.

[0047] For example, when the laser emits light, the light emission time of the power amplifier structure needs to be no earlier than the light emission of the seed source; when the light is turned off, the light-off time of the power amplifier structure should be no later than the light-off time of the seed source. If the control timing is disordered, the entire optical path will fail, and even cause the pump source to short-circuit or burn out.

[0048] To this end, the present application provides a laser system that can avoid disorder in the light emission sequence of a seed source and a power amplification structure to ensure that the laser can operate stably.

[0049] Combination Figure 1 and Figure 2 , a laser system includes a seed source 100, one or more cascaded power amplification structures 200 and a power supply module.

[0050] The seed source 100 includes a first pump source module 110, and the power amplifier structure 200 includes a second pump source module 230. The first pump source module 110 and the second pump source module 230 are connected in series to form a pump source structure.

[0051] The output end of the power module is connected to the input end of the pump source structure, and the input end of the power module is connected to the output end of the pump source structure.

[0052] In the above method, the first pump source module 110 of the seed source 100 and the second pump source module 230 of the power amplifier structure 200 are connected in series to form a pump source structure, and then connected to the pump source structure through the power module. In this way, when the power module generates a driving power supply, the first pump source module 110 and the second pump source module 230 can be turned on synchronously, that is, it is ensured that the seed source 100 and the power amplifier structure 200 can emit light synchronously. This method avoids the disorder of the light emission sequence of the seed source 100 and the power amplifier structure 200 to ensure that the laser can work stably.

[0053] Specifically, in some embodiments, the output end of the power supply module can be connected to the input end of the first pump source module 110, the output end of the first pump source module 110 can be connected to the input end of the second pump source module 230, and the output end of the second pump source module 230 is connected to the input end of the power supply module.

[0054] In other embodiments, the output end of the power module can be connected to the input end of the second pump source module 230, the output end of the second pump source module 230 can be connected to the input end of the first pump source module 110, and the output end of the first pump source module 110 can be connected to the input end of the power module.

[0055] Combination Figure 1 and Figure 2 In some embodiments, the first pump source module 110 may include a plurality of first pump sources 111 , and the plurality of first pump sources 111 are sequentially connected in series.

[0056] It is understandable that when the first pump source module 110 includes a plurality of first pump sources 111 connected in series, one end of the plurality of first pump sources 111 connected in series may be connected to the power module, and the other end may be connected to the second pump source module 230 .

[0057] In some embodiments, the second pump source module 230 may include a plurality of second pump sources 231 , and the plurality of second pump sources 231 are sequentially connected in series.

[0058] It is understandable that when the second pump source module 230 includes multiple second pump sources 231 connected in series, one end of the multiple second pump sources 231 connected in series can be connected to the power module, and the other end can be connected to the first pump source module 110 .

[0059] When the first pump source module 110 includes a plurality of first pump sources 111 connected in series, and the second pump source module 230 includes a plurality of second pump sources 231 connected in series, one end of the plurality of first pump sources 111 connected in series can be connected to the power supply module, the other end of the plurality of first pump sources 111 connected in series can be connected to one end of the plurality of second pump sources 231 connected in series, and the other end of the plurality of second pump sources 231 connected in series can be connected to the power supply module.

[0060] In the above manner, when the power module generates driving power, each of the first pump source 111 and the second pump source 231 can be turned on synchronously, that is, it is ensured that each of the first pump source 111 and the second pump source 231 can emit light synchronously.

[0061] See also Figure 3 When there are multiple power amplification structures 200 (for example, two), there are correspondingly multiple groups of second pump source modules 230. At this time, in some embodiments, the first pump source module 110 and the multiple groups of second pump source modules 230 can be connected in series in sequence.

[0062] Alternatively, when a power amplification structure 200 includes a plurality of groups of second pump source modules 230 , in some embodiments, the first pump source module 110 and the plurality of groups of second pump source modules 230 may be sequentially connected in series.

[0063] See also Figure 2 The power supply module may also include a constant voltage source module and a constant current source module, the output end of the constant voltage source module is connected to the input end of the constant current source module, the output end of the constant current source module is connected to the input end of the pump source structure, and the input end of the constant current source module is connected to the output end of the pump source structure.

[0064] The constant voltage source module is used to convert alternating current into direct current, and the constant current source module is used to convert a voltage source into a controllable current source to drive the pump source structure to work.

[0065] Specifically, in some embodiments, the output end of the constant pressure source module can be connected to the input end of the first pump source module 110, the output end of the first pump source module 110 can be connected to the input end of the second pump source module 230, and the output end of the second pump source module 230 is connected to the input end of the constant pressure source module.

[0066] In other embodiments, the output end of the constant pressure source module can be connected to the input end of the second pump source module 230, the output end of the second pump source module 230 can be connected to the input end of the first pump source module 110, and the output end of the first pump source module 110 is connected to the input end of the constant pressure source module.

[0067] In addition, combined Figure 1 and Figure 4 The present application also provides a laser system, including a seed source 100, one or more cascaded power amplification structures 200 and a power supply module. The seed source 100 includes a plurality of first pump sources 111, and each power amplification structure 200 includes a plurality of second pump sources 231. It should be noted that when there are multiple power amplification structures 200, the number of second pump sources 231 of each power amplification structure 200 can be the same or different.

[0068] Further, the plurality of first pump sources 111 are divided into a plurality of groups of first pump source modules 110, each group of first pump source modules 110 includes a preset number of first pump sources 111, and the first pump sources 111 in each group of first pump source modules 110 are sequentially connected in series. The number of the preset first pump sources 111 in each group of first pump membrane modules may be the same or different.

[0069] The plurality of second pump sources 231 are divided into a plurality of groups of second pump source modules 230, each group of second pump source modules 230 includes a preset number of second pump sources 231, and the second pump sources 231 in each group of second pump source modules 230 are sequentially connected in series. The number of preset second pump sources 231 in each group of second pump membrane modules may be the same or different. In addition, when there are a plurality of power amplification structures 200, the number of groups of second pump source modules 230 formed by each power amplification structure 200 may be the same or different.

[0070] Each group of first pump source modules 110 is connected in series with at least one group of second pump source modules 230 to form a pump source structure, and at the same time, it is ensured that each group of second pump source modules 230 is connected in series with the first pump source module 110. In other words, each group of first pump source modules 110 is respectively connected in series with one or more groups of second pump source modules 230, and the number of groups of second pump source modules 230 connected between each group of first pump source modules 110 can be the same or different, and at the same time, it is ensured that each group of second pump source modules 230 is connected in series with the first pump source module 110.

[0071] The output end of the power module is connected to the input end of each pump source structure respectively, and the input end of the power module is connected to the output end of each pump source structure respectively.

[0072] It can be seen that in the laser system, the plurality of first pump sources 111 in the seed source 100 are grouped into a plurality of first pump source modules 110, and the plurality of second pump sources 231 in the power amplifier structure 200 are grouped into a plurality of second pump source modules 230. Under the condition that each group of first pump source modules 110 is connected to the second pump source module 230 and each group of second pump source modules 230 is connected to the first pump source module 110, each group of first pump source modules 110 is connected in series to one or more groups of second pump source modules 230. Group 230 forms a pump source structure, and then in the case of multiple groups of first pump source modules 110, multiple pump source structures can be formed, and finally each pump source structure is connected in parallel with the power module, so that when the power module generates a driving power supply, the first pump source module 110 and the second pump source module 230 can be turned on synchronously, ensuring that the seed source 100 and the power amplification structure 200 can emit light synchronously, while avoiding the situation where too many first pump sources 111 and second pump sources 231 are connected in series, causing the power supply voltage of the power module to be too large.

[0073] It is understandable that the voltage that can be provided by the power module of the laser is generally limited, so the number of first pump sources 111 and the number of second pump sources 231 in a high-power laser are generally large. If all the first pump sources 111 and the second pump sources 231 are connected in series to form a pump source structure, the voltage required by the pump source structure will become very large, which is not conducive to the design of the entire control circuit of the laser. Therefore, in the above-mentioned embodiment, by forming multiple pump source structures, and connecting the multiple pump source structures to the power module in parallel, the voltage required to be provided by the power module can be reduced.

[0074] Furthermore, the total number of second pump source modules 230 respectively formed by one or more power amplification structures 200 is not less than the number of first pump source 111 membrane modules, so that each group of first pump source modules 110 can be connected in series with one or more groups of second pump source modules 230 to form a pump source structure.

[0075] Further, in some embodiments, in order to ensure optical stability in the laser system, in each pump source structure, the ratio of the number of first pump sources 111 to the number of second pump sources 231 is within a preset ratio range. In addition, it should be noted that between each pump source structure, the ratio of the number of first pump sources 111 to the number of second pump sources 231 can be the same or different, and it is only necessary to ensure that the ratio of the number of first pump sources 111 to the number of second pump sources 231 in each pump source structure is within a preset ratio range.

[0076] Optionally, in each pump source structure, the ratio of the number of first pump sources 111 to the number of second pump sources 231 may be 1:3 to 1:15.

[0077] For example, in the pump source structure, the ratio of the number of the first pump sources 111 to the number of the second pump sources 231 may be 1:3.

[0078] In the pump source structure, the ratio of the number of the first pump sources 111 to the number of the second pump sources 231 may be 1:7.

[0079] In the pump source structure, the ratio of the number of the first pump sources 111 to the number of the second pump sources 231 may be 1:10.

[0080] In the pump source structure, the ratio of the number of the first pump sources 111 to the number of the second pump sources 231 may be 1:15.

[0081] Preferably, in some embodiments, the number of first pump sources 111 in each pump source structure is in the same ratio as the number of second pump sources 231. This approach can better ensure the optical stability of the laser and facilitate the power module to drive multiple pump source structures.

[0082] Furthermore, in order to further improve optical stability, the number of first pump sources 111 in each pump source structure is the same.

[0083] In order to further improve optical stability, the number of second pump sources 231 in each pump source structure is the same.

[0084] At the same time, when the number of first pump sources 111 in each pump source structure is the same, and the number of second pump sources 231 in each pump source structure is the same, the voltage required by each pump source structure is the same, which is conducive to the power supply module driving multiple pump source structures at the same time.

[0085] Specifically, the number of groups of the first pump source modules 110 is the same as the number of groups of the second pump source modules 230. It should be noted that, in some embodiments, the number of groups of the first pump source modules 110 may be the same as the number of groups of the second pump source modules 230 in each power amplification structure 200. In other embodiments, the number of groups of the first pump source modules 110 may be the same as the total number of groups of the second pump source modules 230 respectively formed in one or more power amplification structures 200. This method facilitates the determination of the number of groups of the first pump source modules 110 and the second pump source modules 230 in each pump source structure, is beneficial to the design of the laser system, and is convenient for the power supply module to be connected to multiple pump source structures.

[0086] Further, the second pump source 231 in each power amplification structure 200 is divided into a plurality of second pump source modules 230, and the number of the second pump source modules 230 is not less than the number of the first pump source 111 membrane modules. The number of the second pump source modules 230 in each power amplification structure 200 is the same. Each group of first pump source modules 110 is connected in series with at least one group of second pump source modules 230 in each power amplification structure 200 to form a pump source structure. The above method is conducive to ensuring the optical stability of the laser, and is also conducive to the design of the laser system, and is convenient for connecting the power module with multiple pump source structures.

[0087] Preferably, the number of the second pump source modules 230 in each power amplification structure 200 is the same as the number of the first pump source modules 110. In this way, one first pump source module 110 is connected in series with one second pump source module 230, which facilitates the setting of the laser system and helps to improve the optical stability of the laser.

[0088] Furthermore, the number of first pump sources 111 in each group of first pump source modules 110 is the same. The number of second pump sources 231 in each group of second pump source modules 230 in each power amplifier structure 200 is the same. This method is conducive to making the number of first pump sources 111 between each pump source structure the same, and making the number of second pump sources 231 between each pump source structure the same, so that the voltage required by each pump source structure can be the same, which is conducive to the power supply module driving multiple pump source structures at the same time.

[0089] The power supply module includes a constant voltage source module and a constant current source module, wherein the number of the constant current source modules is the same as the number of the pump source structures.

[0090] The input end and the output end of each pump source structure are respectively connected to a constant current source module. The output end of the constant voltage source module is respectively connected to the input end of each constant current source module.

[0091] See also Figure 1 The present application also provides a fiber laser, including a seed source 100 and one or more cascaded power amplification structures 200.

[0092] The seed source 100 includes a first pump source module 110 , a first beam combiner 120 , a high-reflection grating 130 , a first gain fiber 140 and a low-reflection grating 150 , which are optically connected in sequence.

[0093] The power amplification structure 200 includes a second gain fiber 210 , a second beam combiner 220 , and a second pump source module 230 connected to the second beam combiner 220 .

[0094] The first pump source module 110 and the second pump source module 230 are connected using the connection method in the laser system of the embodiment of the present application.

[0095] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of some applications should be included in the protection scope of some applications.

Claims

1. A laser system, characterized in that: A power amplifier structure comprising a seed source and one or more cascaded power amplifier structures, wherein the seed source comprises a first pump source module, and the power amplifier structure comprises a second pump source module; The first pump source module and the second pump source module are connected in series to form a pump source structure; as well as The laser also includes a power supply module, the output end of the power supply module is connected to the input end of the pump source structure, and the input end of the power supply module is connected to the output end of the pump source structure.

2. The laser system according to claim 1, characterized in that The first pump source module includes a plurality of first pump sources, and the plurality of first pump sources are sequentially connected in series.

3. The laser system according to claim 1, characterized in that The second pump source module includes a plurality of second pump sources, and the plurality of second pump sources are sequentially connected in series.

4. The laser system according to any one of claims 1 to 3, characterized in that: The power supply module includes a constant voltage source module and a constant current source module, the output end of the constant voltage source module is connected to the input end of the constant current source module, the output end of the constant current source module is connected to the input end of the pump source structure, and the input end of the constant current source module is connected to the output end of the pump source structure.

5. A laser system, characterized in that: A power amplifier structure comprising a seed source and one or more cascaded power amplifier structures, wherein the seed source comprises a plurality of first pump sources, and each of the power amplifier structures comprises a plurality of second pump sources; The plurality of first pump sources are divided into a plurality of groups of first pump source modules, each group of the first pump source modules respectively includes a preset number of first pump sources, and the first pump sources in each group of the first pump source modules are sequentially connected in series; The plurality of second pump sources are divided into a plurality of second pump source modules, each of which comprises a preset number of second pump sources, and the second pump sources in each of which are connected in series in sequence; Each group of the first pump source modules is connected in series with one or more groups of the second pump source modules to form a pump source structure, while ensuring that each group of the second pump source modules is connected in series with the first pump source module; as well as The laser also includes a power supply module, the output end of the power supply module is respectively connected to the input end of each of the pump source structures, and the input end of the power supply module is respectively connected to the output end of each of the pump source structures.

6. The laser system according to claim 5, characterized in that In each of the pump source structures, the ratio of the number of the first pump sources to the number of the second pump sources is within a preset ratio range.

7. The laser system of claim 6, wherein: In each of the pump source structures, the ratio of the number of the first pump sources to the number of the second pump sources is 1:3 to 1:

15.

8. The laser system of claim 7, wherein: The ratio of the number of the first pump sources to the number of the second pump sources in each of the pump source structures is the same.

9. The laser system of claim 8, wherein: The number of the first pump sources in each of the pump source structures is the same, and the number of the second pump sources in each of the pump source structures is the same.

10. The laser system according to any one of claims 5 to 9, characterized in that The number of the first pump source modules is the same as the number of the second pump source modules.

11. The laser system of claim 8, wherein: The second pump source in each of the power amplification structures is divided into a plurality of second pump source modules, and the number of the second pump source modules is not less than the number of the first pump source module modules; The number of the second pump source modules in each of the power amplification structures is the same; Each group of the first pump source modules is connected in series with at least one group of the second pump source modules in each of the power amplification structures to form a pump source structure.

12. The laser system of claim 11, wherein: The number of the second pump source modules in each of the power amplification structures is respectively the same as the number of the first pump source modules.

13. The laser system of claim 12, wherein: The number of first pump sources in each group of the first pump source modules is the same; The number of the second pump sources in each group of the second pump source modules in each of the power amplification structures is the same.

14. The laser system according to any one of claims 5 to 9, characterized in that The power supply module includes a constant voltage source module and a constant current source module, and the number of the constant current source modules is the same as the number of the pump source structures; The input end and the output end of each of the pump source structures are respectively connected to one of the constant current source modules; The output end of the constant voltage source module is connected to the input end of each constant current source module respectively.

15. A fiber laser, characterized in that: A power amplification structure including a seed source and one or more cascaded power amplification structures; The seed source comprises a first pump source module, a first beam combiner, a high-reflection grating, a first gain fiber and a low-reflection grating which are optically connected in sequence; The power amplification structure includes a second gain fiber connected in an optical path, a second beam combiner, and a second pump source module connected to the second beam combiner, and the second gain fiber is connected to the low-reflection grating; in, The first pump source module and the second pump source module are connected using the connection method in the laser system according to any one of claims 1 to 14.

Images