CN210577003U - High-power nanosecond pulse fiber laser - Google Patents
High-power nanosecond pulse fiber laser Download PDFInfo
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- CN210577003U CN210577003U CN201921952087.7U CN201921952087U CN210577003U CN 210577003 U CN210577003 U CN 210577003U CN 201921952087 U CN201921952087 U CN 201921952087U CN 210577003 U CN210577003 U CN 210577003U
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Abstract
The utility model discloses a high power nanosecond pulse fiber laser, including nanosecond pulse seed light source, first beam combiner and output end cap, nanosecond pulse seed light source's output links to each other with a plurality of amplification system, and each amplification system's output links to each other with first isolator respectively, and the output of each first isolator all links to each other with first beam combiner, first beam combiner links to each other with the output end cap. In order to ensure that nanosecond pulse laser output pulses have no time delay, each amplification system is respectively connected with a nanosecond pulse seed light source (seed source), a high-power isolator is arranged on an amplification light path of each branch, and is respectively isolated and then combined by using an optical fiber beam combiner to output, so that the light path is protected from interference of feedback light, and the maximum output average power can reach 5700W.
Description
Technical Field
The utility model relates to a high power nanosecond pulse fiber laser.
Background
Nanosecond pulse fiber lasers have been widely used in the fields of laser processing, laser range finders, secondary harmonic generation, military scientific research and the like. In the working process of the high-power nanosecond pulse fiber laser, a large amount of feedback light can cause unrecoverable damage to a light path when returning to the light path, and due to the limitation of the research and development of the current high-power isolator, the nanosecond pulse fiber laser with the average power exceeding 500W cannot isolate the return light by using the online isolator, so that a laser system is unstable.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a high power nanosecond pulse fiber laser ware protects the light path and does not receive the interference of feedback light, and output average power can reach 5700W at most.
For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:
high power nanosecond pulse fiber laser, including nanosecond pulse seed light source, first beam combiner and output end cap, nanosecond pulse seed light source's output links to each other with a plurality of amplification system, and each amplification system's output links to each other with first isolator respectively, and each first isolator's output all links to each other with first beam combiner, first beam combiner links to each other with the output end cap.
Preferably, the nanosecond pulse seed light source comprises a first pump LD, the first pump LD is connected with a second beam combiner through an optical fiber, the second beam combiner is connected with a first grating, and the first grating is connected with a second grating through a first ytterbium-doped optical fiber.
Preferably, the amplifying system comprises a second isolator, an output end of the second isolator and an output end of the second pump LD are both connected with a third combiner, and the third combiner is connected with the mode stripper through a second ytterbium-doped fiber.
Preferably, the output end cap is internally provided with a collimator, a galvanometer and a field lens.
Preferably, the nanosecond pulsed seed light source is connected with 2-19 amplification systems.
Preferably, the first grating and the second grating are fiber gratings with an operating wavelength of 1064 nm.
The utility model has the advantages that:
in order to ensure that nanosecond pulse laser output pulses have no time delay, each amplification system is respectively connected with a nanosecond pulse seed light source (seed source), a high-power isolator is arranged on an amplification light path of each branch, and is respectively isolated and then combined by using an optical fiber beam combiner to output, so that the light path is protected from interference of feedback light, and the maximum output average power can reach 5700W.
Drawings
FIG. 1 is a schematic structural diagram of a high power nanosecond pulse fiber laser according to the present invention;
FIG. 2 is a schematic diagram of the nanosecond pulsed seed light source of the present invention;
fig. 3 is a schematic structural diagram of the amplifying system of the present invention;
the reference numerals of the drawings have the following meanings:
1: nanosecond pulsed seed light source; 2: an amplification system; 3: a first isolator; 4: a first combiner; 5: an output end cap; 6: a first pump LD; 7: a second combiner; 8: a first grating; 9: a first ytterbium-doped fiber; 10: a second grating; 11: a second isolator; 12: a second pump LD; 13: a third combiner; 14: a second ytterbium-doped fiber; 15: and (4) stripping the mold.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not limited to the present invention.
As shown in fig. 1, the high-power nanosecond pulse fiber laser includes a nanosecond pulse seed light source 1, a first beam combiner 4 and an output end cap 5, where the nanosecond pulse seed light source 1 is used as a seed source and is a light source of a laser generating device for generating high-energy pulse laser. As shown in fig. 2, preferably, the nanosecond pulsed seed light source 1 includes a first pump LD6, the pump LD is an oscillating pump energy supply, the first pump LD6 is connected to a second beam combiner 7 through an optical fiber, the second beam combiner 7 is connected to a first grating 8 through an optical fiber, and the first grating 8 is connected to a second grating 10 through a first ytterbium-doped optical fiber 9.
The second beam combiner 7 couples and inputs the laser generated by the pump LD to the gain fiber (i.e., the ytterbium-doped fiber), the ytterbium-doped fiber absorbs the laser of the pump LD, the ytterbium ion absorption energy of the fiber core generates energy level transition, and the wavelength is selected by the grating in the spontaneous radiation process. Preferably, the first grating 8 and the second grating 10 are fiber gratings with an operating wavelength of 1064nm, so as to realize a function of selecting a wavelength band.
The output end of the nanosecond pulse seed light source 1 is connected with the plurality of amplification systems 2, preferably, the nanosecond pulse seed light source 1 is connected with 2-19 amplification systems 2, in fig. 1, the nanosecond pulse seed light source 1 is connected with 4 amplification systems 2, and the amplification systems 2 amplify signal light, preferably, as shown in fig. 3, the amplification systems 2 include a second isolator 11, the output end of the second isolator 11 and the output end of the second pump LD12 are both connected with a third combiner 13, and the third combiner 13 is connected with a mode stripper 15 through a second ytterbium-doped optical fiber 14. The third beam combiner 13 couples the signal light and the laser light generated by the pump LD into the gain fiber.
The output end of each amplification system 2 is connected with a first isolator 3, the output end of each first isolator 3 is connected with a first beam combiner 4, and the first beam combiner 4 is connected with an output end cap 5. The first isolator 3 blocks the backward light return generated by the nonlinear effect in the amplification process of the laser, and the influence caused by the nonlinear effect is avoided.
Preferably, a collimator, a galvanometer and a field lens are arranged in the output end cap 5, and the laser cleans the cleaning material through the output end cap 5.
In order to ensure that nanosecond pulse laser outputs pulses without time delay, each amplification system is respectively connected with a nanosecond pulse seed light source (namely a seed source), a high-power online isolator (bearing the laser power of 300W) is arranged on the amplification light path of each branch, and an optical fiber beam combiner is used for combining and outputting after being respectively isolated, so that the light path is protected from interference of feedback light, and the output average power can reach 5700W at most.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings are utilized, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (6)
1. High power nanosecond pulse fiber laser, including nanosecond pulse seed light source (1), first beam combiner (4) and output end cap (5), its characterized in that, the output of nanosecond pulse seed light source (1) links to each other with a plurality of amplification system (2), and the output of each amplification system (2) links to each other with first isolator (3) respectively, and the output of each first isolator (3) all links to each other with first beam combiner (4), first beam combiner (4) link to each other with output end cap (5).
2. The high-power nanosecond pulsed fiber laser according to claim 1, wherein the nanosecond pulsed seed light source (1) comprises a first pump LD (6), the first pump LD (6) is connected to a second beam combiner (7) through an optical fiber, the second beam combiner (7) is connected to a first grating (8), and the first grating (8) is connected to a second grating (10) through a first ytterbium-doped fiber (9).
3. The high power nanosecond pulsed fiber laser according to claim 2, wherein the amplification system (2) comprises a second isolator (11), wherein the output of the second isolator (11) and the output of the second pump LD (12) are both connected to a third combiner (13), and wherein the third combiner (13) is connected to the mode stripper (15) through a second ytterbium-doped fiber (14).
4. The high power nanosecond pulse fiber laser according to claim 1, characterized in that the output end cap (5) has a collimator, a galvanometer and a field lens built in.
5. The high power nanosecond pulsed fiber laser according to claim 3, characterized in that the nanosecond pulsed seed light source (1) is connected to 2-19 amplification systems (2).
6. The high-power nanosecond pulse fiber laser according to claim 2, wherein the first and second gratings (8, 10) are fiber gratings with an operating wavelength of 1064 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921952087.7U CN210577003U (en) | 2019-11-13 | 2019-11-13 | High-power nanosecond pulse fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921952087.7U CN210577003U (en) | 2019-11-13 | 2019-11-13 | High-power nanosecond pulse fiber laser |
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| CN210577003U true CN210577003U (en) | 2020-05-19 |
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| CN201921952087.7U Active CN210577003U (en) | 2019-11-13 | 2019-11-13 | High-power nanosecond pulse fiber laser |
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