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Large energy long pulse fiber laser

A fiber laser, long-pulse technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of improving the quality of high-energy long-pulse laser beams, etc., to improve laser power stability and long service life. , the effect of improving accuracy

Pending Publication Date: 2018-09-25
长春德信光电技术有限公司
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a high-energy long-pulse fiber laser to solve the technical problem that the structure of the traditional long-pulse laser is simple and the improvement of the quality of the obtained high-energy long-pulse laser beam is limited

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Embodiment Construction

[0029] Such as figure 1 As shown, a high-energy long-pulse fiber laser includes a laser driver 1, a seed source 2, a laser amplifier 3, a cladding optical stripper 4, a photodetector III 5 and a laser output head 6,

[0030] The laser driver 1 includes a single-chip microcomputer 101, an RS232 interface 102, a semiconductor laser driver module 103 and a human-computer interaction module 104;

[0031] The seed source 2 includes a pumping source I201, a pumping optical coupler I202, a photodetector I203, a high reflection grating 204, a gain fiber I205, a low reflection grating 206 and an isolator 207; the pumping source I201, the pumping Optical coupler I202, high reflection grating 204, gain fiber I205, low reflection grating 206 and isolator 207 are sequentially connected through optical fibers; the optical detector I203 is connected to pump optical coupler I202 through optical fibers;

[0032] The laser amplifier 3 includes a pump source II 301, a pump optical coupler II 30...

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Abstract

A large energy long pulse fiber laser belongs to the technical field of fiber laser. The large energy long pulse fiber laser includes a laser driver, a seed source, a laser amplifier, a cladding optical stripper, an optical detector III, and a laser output head. A main oscillation power amplifying structure MOPA is adopted in the long pulse fiber laser, and a continuous or long pulse laser driveris used to drive a semiconductor laser as a pump source, long pulse fiber laser seed light with high beam quality is acquired, and then the seed light source is amplified through the laser amplifier,and a continuous or long pulse high energy long pulse laser with the desired parameters can be acquired. The laser amplifier also uses the long pulse laser driver to drive the semiconductor laser as apump source; and through the photoelectric detection and synchronous driving technology, the laser amplifier pump source pulse and the seed light pulse operate synchronously. In the above manner, a continuous or long pulse fiber laser with high beam quality can be obtained, and the large energy long pulse fiber laser is used for applications such as laser welding.

Description

technical field [0001] The invention belongs to the field of fiber laser technology, in particular to a high-energy long-pulse fiber laser. Background technique [0002] Laser processing has significant advantages such as high precision, small hot zone, and good processing quality. The traditional lamp-pumped solid-state laser has the advantages of high single pulse energy, low cost per unit, fixed hot zone of single pulse, etc., so it is widely used in the laser processing industry, but it also has high energy consumption, relatively poor beam quality, and poor focus The rear spot is relatively large and other shortcomings. Compared with traditional lasers, fiber lasers have better beam quality, are more suitable for high-precision processing, and have lower energy consumption. They are a new type of high-efficiency and energy-saving laser light source. [0003] The high-energy long-pulse fiber laser with a single pulse energy of tens of joules and a pulse width of millis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/131H01S3/094
CPCH01S3/094003H01S3/1312
Inventor 张巍张辰董洪斌白戎刘大巍孙婷婷
Owner 长春德信光电技术有限公司
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