CN221080617U - Optical fiber amplifying device and optical fiber oscillating device for optical fiber laser - Google Patents
Optical fiber amplifying device and optical fiber oscillating device for optical fiber laser Download PDFInfo
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- CN221080617U CN221080617U CN202322745018.1U CN202322745018U CN221080617U CN 221080617 U CN221080617 U CN 221080617U CN 202322745018 U CN202322745018 U CN 202322745018U CN 221080617 U CN221080617 U CN 221080617U
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Abstract
The application discloses an optical fiber amplifying device and an optical fiber oscillating device for an optical fiber laser, wherein the optical fiber amplifying device for the optical fiber laser comprises a pump generating part, a pump beam combining part, a gain optical fiber and a pump beam splitting part. The pump generator is used for providing pump light. The pump beam combining component is provided with at least one first pump input end, and the pump generating component is connected with the first pump input end. The pump beam splitting part is connected with one end part of the gain optical fiber far away from the pump beam combining part, and the pump beam splitting part is arranged to couple the pump light which is not absorbed by the gain optical fiber into the gain optical fiber again. In order to overcome the nonlinear effect of the optical fiber amplifying device for the optical fiber laser, the length of the gain optical fiber is shortened, the absorption amount of the pump light by the gain optical fiber is reduced for a single time, and the pump light which is not absorbed is returned to the optical path through the pump beam splitter and is absorbed by the gain optical fiber.
Description
Technical Field
The present utility model relates to the technical field of optical elements, and in particular, to an optical fiber amplifying device and an optical fiber oscillating device for an optical fiber laser.
Background
The fiber laser refers to a laser using rare earth element doped glass fiber as a gain medium. The optical fiber amplifying device and the optical fiber oscillating device are two common structures in the optical fiber laser, and have similar structures although different in functions, and both the optical fiber amplifying device and the optical fiber oscillating device need a pumping source and a gain optical fiber, so that the problems of pumping light absorption efficiency and nonlinear effects exist. Taking an optical fiber amplifying device as an example, in order to ensure that the optical fiber amplifying device effectively absorbs pump light and improve the electro-optical efficiency of the whole machine, a longer gain optical fiber needs to be arranged, and the nonlinear effect is enhanced due to the longer gain optical fiber. Otherwise, if the gain fiber is shortened to reduce the nonlinear effect, the absorption amount of pump light is reduced, and the electro-optical efficiency of the whole machine is further affected.
Disclosure of utility model
An advantage of the present utility model is to provide a fiber oscillating device for a fiber amplifying device of a fiber laser capable of improving the absorption amount of pump light while reducing nonlinear effects.
To achieve at least one of the above advantages, the present utility model provides a fiber amplifying device for a fiber laser, the fiber amplifying device for a fiber laser including:
The pump generating piece is used for providing pump light;
the pump beam combining piece is provided with at least one first pump input end, and the pump generating piece is connected with the first pump input end;
The output end of the pump beam combining piece is connected with one end part of the gain optical fiber;
The pump beam splitting piece is connected with one end portion, far away from the pump beam combining piece, of the gain optical fiber, and the pump beam splitting piece is capable of connecting the pump light which is not absorbed by the gain optical fiber into the gain optical fiber again.
According to an embodiment of the utility model, the gain fiber is implemented as a rare earth doped fiber.
According to an embodiment of the utility model, the tail fibers of the pump beam splitting component are connected in pairs.
According to an embodiment of the present utility model, the pump beam combining element further forms at least one second pump input end, and the tail fibers of the pump beam splitting element are respectively connected with the second pump input ends of the pump beam combining element.
According to an embodiment of the present utility model, the optical fiber amplifying device for an optical fiber laser further includes a signal source and at least one filtering element, wherein a signal output end of the signal source is connected to the pump beam splitting element, the signal source is configured to output signal light to the gain optical fiber, and the filtering element is disposed at a rear section of the optical fiber amplifying device for an optical fiber laser, and the filtering element is configured to strip cladding light in an optical path.
To achieve at least one of the above advantages, the present utility model provides a fiber oscillating device for a fiber laser, the fiber oscillating device for a fiber laser comprising:
The pump generating piece is used for providing pump light;
the pump beam combining piece is provided with at least one first pump input end, and the pump generating piece is connected with the first pump input end;
The output end of the pump beam combining piece is connected with the first grating;
the first grating is connected with one end part of the gain optical fiber at the position away from the pump beam combining piece;
The gain optical fiber is connected with the second grating at one end part far away from the first grating;
and one end part of the second grating, which is far away from the gain fiber, is connected with one end part of the pumping beam splitting piece, and the pumping beam splitting piece is arranged to be capable of connecting the pump light which is not absorbed by the gain fiber into the gain fiber again.
According to an embodiment of the utility model, the tail fibers of the pump beam splitting component are connected in pairs.
According to an embodiment of the present utility model, the pump beam combining element forms at least one second pump input end, and the tail fibers of the pump beam splitting element are respectively connected with the second pump input ends of the pump beam combining element.
According to an embodiment of the utility model, the pump generator may be implemented as a single pump source or as multiple pump sources.
According to an embodiment of the utility model, the pump combiner is implemented as an inverse combiner and the pump splitter is implemented as a pump splitter.
Drawings
Fig. 1 shows a schematic structure of an embodiment of a fiber amplifying device for a fiber laser according to the present utility model.
Fig. 2 shows a schematic structural diagram of another embodiment of a fiber amplifying device for a fiber laser according to the present utility model.
Fig. 3 is a schematic structural view showing an embodiment of a fiber oscillation device for a fiber laser according to the present utility model.
Fig. 4 is a schematic structural view showing another embodiment of the fiber oscillation device for a fiber laser according to the present utility model.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Referring to fig. 1 and 2, a fiber amplifying device for a fiber laser according to a preferred embodiment of the present utility model, which includes a pump generator 10, a pump combiner 20, a gain fiber 30, and a pump splitter 40, will be described in detail below.
Specifically, the pump combiner 20 has at least a first pump input 21. The pump generator 10 is connected to the first pump input 21, and the output of the pump combiner 20 is connected to one end of the gain fiber 30. In this way, the pump light provided by the pump generator 10 can be coupled into the gain fiber 30 via the pump combiner 20.
The pump beam splitter 40 is connected to an end of the gain fiber 30 remote from the pump beam combiner 20, and the pump beam splitter 40 is configured to re-couple pump light not absorbed by the gain fiber 30 into the gain fiber 30 for re-absorption by the gain fiber 30.
It will be appreciated by those skilled in the art that in order to overcome the nonlinear effects of the fiber amplifying device for the fiber laser, the length of the gain fiber 30 may be shortened, the amount of absorption of pump light by the shortened gain fiber 30 is reduced once, and the pump light that is not absorbed may be returned to the optical path through the pump beam splitter 40 to be re-absorbed by the gain fiber 30. Thereby improving the utilization ratio of the pump light.
It is worth mentioning that the pump generator 10 may be implemented as a single pump source or as multiple pump sources.
In one example, the pump generator 10 is any one of a semiconductor laser, a solid state laser, and the like.
Preferably, the pump combiner 20 is implemented as an inverse combiner.
In a preferred embodiment, the gain fiber 30 is implemented as a rare earth doped fiber, such as an ytterbium doped fiber.
Referring to fig. 1, in an embodiment, the pigtails of the pump splitting assembly 40 are connected in pairs.
Specifically, the pump light output by the pump generating element 10 is connected to the gain optical fiber 30 through the pump beam combining element 20, part of the pump light is absorbed by the gain optical fiber 30, and the pump light which is not absorbed continues to be output to the pump beam splitting element 40, and then is input to the gain optical fiber 30 by the pump beam splitting element 40, so as to be absorbed by the gain optical fiber 30, thereby improving the utilization rate of the pump light.
Referring to fig. 2, as a modification of the above embodiment, the pump combiner 20 further forms at least one second pump input 22. The pigtails of the pump splitting element 40 are connected to the second pump input 22 of the pump combining element 20.
In this way, the pump light output by the pump generating element 10 is coupled to the gain optical fiber 30 through the pump beam combining element 20, part of the pump light is absorbed by the gain optical fiber 30, the unabsorbed pump light continues to be output to the pump beam splitting element 40, and the pump light output to the pump beam splitting element 40 can enter the pump beam combining element 20 again and be led to the gain optical fiber 30, so as to be re-absorbed by the gain optical fiber 30, thereby improving the utilization rate of the pump light.
In an example, the pump beam splitter 40 is implemented as a pump beam splitter.
Further, the fiber amplifying device for a fiber laser further includes a signal source 50. The signal source 50 is disposed in the optical path so as to output signal light to the gain fiber 30.
In one embodiment, the signal output of the signal source 50 is connected to the pump beam splitter 40.
In one example, the signal source 50 may be implemented as, but is not limited to, a semiconductor laser.
Further, the fiber amplifying device for a fiber laser further includes at least one filtering member 60. The filtering piece 60 is disposed at the rear section of the optical fiber amplifying device for the optical fiber laser, and is used for stripping the cladding light in the optical path.
In one example, the filter 60 is implemented as a cladding light filter.
Referring to fig. 3 to 4, the present utility model also proposes a fiber oscillating device for a fiber laser. The fiber oscillation device for a fiber laser includes a pump generating element 10A, a pump beam combining element 20A, a first grating 30A, a gain fiber 40A, a second grating 50A, and a pump beam splitting element 60A.
Specifically, the pump combiner 20A has at least a first pump input 21A. The pump generator 10A is connected to the first pump input 21A, and the output of the pump combiner 20A is connected to the first grating 30A. An end of the first grating 30A remote from the pump combiner 20A is connected to an end of the gain fiber 40A. In this way, the pump light provided by the pump generator 10A can be coupled into the gain fiber 40A through the pump combiner 20A and the first grating 30A.
An end of the gain fiber 40A remote from the first grating 30A is connected to the second grating 50A. An end of the second grating 50A remote from the gain fiber 40A is connected to an end of the pump beam splitter 60A, and the pump beam splitter 60A is configured to couple the pump light unabsorbed by the gain fiber 40A into the gain fiber 40A again to be re-absorbed by the gain fiber 40A, thereby improving the utilization of the pump light.
It is worth mentioning that the pump generator 10A may be implemented as a single pump source or as multiple pump sources.
In one example, the pump generator 10A is any one of a semiconductor laser, a solid state laser, and the like.
Preferably, the pump combiner 20A is implemented as an inverse combiner.
In a preferred embodiment, the gain fiber 40A is implemented as a rare earth doped fiber, such as an ytterbium doped fiber.
Referring to fig. 3, in an embodiment, the pigtails of the pump splitting assembly 60A are connected in pairs.
Specifically, the pump light output by the pump generating element 10A is connected to the gain optical fiber 40A through the pump beam combining element 20A, part of the pump light is absorbed by the gain optical fiber 40A, and the pump light which is not absorbed continues to be output to the pump beam splitting element 60A, and then is input to the gain optical fiber 40A by the pump beam splitting element 60A, so as to be absorbed by the gain optical fiber 40A, thereby improving the utilization rate of the pump light.
Referring to fig. 4, as a modification of the above embodiment, the pump combiner 20A forms at least one second pump input 22A. The pigtails of the pump splitting element 60A are respectively connected to the second pump input end 22A of the pump combining element 20A.
That is, the pump light outputted from the pump generating element 10A is coupled to the gain fiber 40A through the pump beam combining element 20A, part of the pump light is absorbed by the gain fiber 40A, and the unabsorbed pump light is outputted to the pump beam splitting element 60A through the second grating 50A, so that the pump light outputted to the pump beam splitting element 60A can enter the pump beam combining element 20A again and be led to the gain fiber 40A, so as to be re-absorbed by the gain fiber 40A, thereby improving the utilization rate of the pump light.
In one example, the pump beam splitter 60A is implemented as a pump beam splitter.
The present embodiment also provides a method for improving absorption efficiency of an optical fiber amplifying device for an optical fiber laser, which specifically includes the following steps:
pump light is coupled into the gain fiber 30 through the pump combiner 20 to be absorbed by the gain fiber 30;
Pump light not absorbed by the gain fiber 30 is re-transmitted into the gain fiber 30 via the pump beam splitter 40 to be re-absorbed by the gain fiber 30.
In one embodiment, unabsorbed pump light is re-entered into the gain fiber 30 from the pump beam splitter 40.
As a matter of deformability, the unabsorbed pump light re-enters the pump combiner 20 via the pump splitter 40 and is further transmitted into the gain fiber 30.
The utility model also provides a method for improving the absorption efficiency of the optical fiber oscillation device for the optical fiber laser, which specifically comprises the following steps:
pump light is coupled into the gain fiber 40A through the pump combiner 20A to be absorbed by the gain fiber 40A;
Pump light not absorbed by the gain fiber 40A is re-transmitted into the gain fiber 40A via the pump beam splitter 60A to be re-absorbed by the gain fiber 40A.
In one embodiment, unabsorbed pump light is re-entered into the gain fiber 40A from the pump beam splitter 60A.
As a matter of deformability, the unabsorbed pump light re-enters the pump combiner 20A via the pump splitter 60A and is re-transmitted into the gain fiber 40A.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present utility model have been fully and effectively realized. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.
Claims (10)
1. A fiber amplifying device for a fiber laser, the fiber amplifying device for a fiber laser comprising:
The pump generating piece is used for providing pump light;
the pump beam combining piece is provided with at least one first pump input end, and the pump generating piece is connected with the first pump input end;
The output end of the pump beam combining piece is connected with one end part of the gain optical fiber;
The pump beam splitting piece is connected with one end portion, far away from the pump beam combining piece, of the gain optical fiber, and the pump beam splitting piece is capable of coupling the pump light which is not absorbed by the gain optical fiber into the gain optical fiber again.
2. The fiber amplifying device for a fiber laser according to claim 1, wherein the gain fiber is implemented as a rare earth doped fiber.
3. The fiber amplifying device according to claim 2, wherein the pigtails of the pump beam splitters are connected in pairs.
4. The fiber amplifying device according to claim 2, wherein the pump combiner further comprises at least one second pump input, and the pigtails of the pump combiner are respectively connected to the second pump input of the pump combiner.
5. The fiber amplifying device according to claim 3 or 4, further comprising a signal source and at least one filtering member, wherein a signal output end of the signal source is connected to the pump beam splitting member, the signal source is configured to output signal light to the gain fiber, and the filtering member is disposed at a rear section of the fiber amplifying device for the fiber laser, and is configured to strip cladding light in an optical path.
6. A fiber oscillation device for a fiber laser, characterized in that the fiber oscillation device for a fiber laser comprises:
The pump generating piece is used for providing pump light;
the pump beam combining piece is provided with at least one first pump input end, and the pump generating piece is connected with the first pump input end;
The output end of the pump beam combining piece is connected with the first grating;
the first grating is connected with one end part of the gain optical fiber at the position away from the pump beam combining piece;
The gain optical fiber is connected with the second grating at one end part far away from the first grating;
And one end part of the second grating, which is far away from the gain fiber, is connected with one end part of the pumping beam splitting piece, and the pumping beam splitting piece is arranged to couple the pump light which is not absorbed by the gain fiber into the gain fiber again.
7. The fiber oscillator device for fiber laser according to claim 6, wherein the pigtails of the pump beam splitters are connected in pairs.
8. The fiber oscillator device of claim 6, wherein the pump combiner forms at least a second pump input, and wherein the pigtails of the pump combiner are respectively connected to the second pump input of the pump combiner.
9. A fibre oscillator device for a fibre laser as claimed in claim 7 or 8, wherein the pump generator is implemented as a single pump source or as a plurality of pump sources.
10. The fiber oscillator device for a fiber laser according to claim 9, wherein the pump combiner is implemented as a backward combiner and the pump splitter is implemented as a pump splitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322745018.1U CN221080617U (en) | 2023-10-12 | 2023-10-12 | Optical fiber amplifying device and optical fiber oscillating device for optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322745018.1U CN221080617U (en) | 2023-10-12 | 2023-10-12 | Optical fiber amplifying device and optical fiber oscillating device for optical fiber laser |
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| Publication Number | Publication Date |
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| CN221080617U true CN221080617U (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322745018.1U Active CN221080617U (en) | 2023-10-12 | 2023-10-12 | Optical fiber amplifying device and optical fiber oscillating device for optical fiber laser |
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| CN (1) | CN221080617U (en) |
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- 2023-10-12 CN CN202322745018.1U patent/CN221080617U/en active Active
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