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Single frequency laser with wavelength band of 1.6[mu]m, high beam quality and high power

A single-frequency laser, high-power technology, applied in the coupling of optical waveguides, the structure/shape of the active medium, etc., can solve the problems of lasers that do not have single-frequency, high beam quality and other output characteristics, poor beam quality, and restricted lasers. , to achieve the effect of not easy fluorescence quenching effect, large size and good beam quality

Inactive Publication Date: 2019-06-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2018, Huaiqin Lin et al. from the University of Southampton in the UK achieved a wavelength of 1610nm, a power of 656W, M 2 ≈10.5 continuous fiber laser output (Opt.Lett., 2018, 43: 3080), but its poor beam quality restricts the application of laser
Although the laser in the above patent has high power and operating wavelength of 1.6 μm, its laser does not have output characteristics such as single frequency and high beam quality.

Method used

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  • Single frequency laser with wavelength band of 1.6[mu]m, high beam quality and high power
  • Single frequency laser with wavelength band of 1.6[mu]m, high beam quality and high power
  • Single frequency laser with wavelength band of 1.6[mu]m, high beam quality and high power

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Embodiment

[0021] figure 1 It is a schematic diagram of the structure of a 1.6μm high-beam quality high-power single-frequency laser based on an all-glass phosphate fiber. Such as figure 1 As shown, the 1.6 μm single-frequency laser seed source 1 and the pump source 2 are respectively connected to the signal input port and the pump port of the fiber combiner 3, and the highly doped all-glass double-clad phosphate fiber 4 is used as the laser gain medium. One end of it is softened and thinned into a tapered shape at high temperature, and then fused and coupled with the output port of the fiber combiner 3, while the other end of the highly doped all-glass double-clad phosphate fiber 4 is also tapered at high temperature, and then connected to the optical fiber The input terminal of the isolator 5 is connected. The output end of the optical isolator 5 is used as a laser output port.

[0022] The end face structure of the highly doped all-glass double-clad phosphate optical fiber 4 used i...

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Abstract

The present invention discloses a single frequency laser with a wavelength band of 1.6[mu]m, high beam quality and high power. The laser system comprises 1.6[mu]m single frequency laser seed source, apumping source, an optical fiber beam combiner, a highly doped all-glass double-clad phosphate optical fiber and an optoisolator. The seed source and the pumping source are connected with the signalinput end of the optical fiber beam combiner and a pumping port, the highly doped all-glass double-clad phosphate optical fiber is taken as a laser gain medium, one end of the highly doped all-glass double-clad phosphate optical fiber is connected with a signal output port of the optical fiber beam combiner, the other end of the highly doped all-glass double-clad phosphate optical fiber is connected with the input end of the optoisolator, and the output end of the optoisolator is taken as a laser output port. The single frequency laser with a wavelength band of 1.6[mu]m, high beam quality andhigh power is good in beam quality, large in output power and high in signal-noise ratio.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to an all-glass phosphate fiber laser with a working waveband of 1.6 μm, high beam quality, high power, and single-frequency output. Background technique [0002] Due to its unique properties, such as low transmission loss in silica fiber, safety to human eyes, and strong penetration to the atmosphere, 1.6 μm lasers have been used in molecular spectroscopy, nonlinear frequency conversion, and mid-infrared lasers. It has important applications in fields such as the same band pump source. At present, there are two main types of gain media for realizing 1.6 μm laser: crystal and optical fiber. Compared with solid-state lasers based on crystal materials, fiber lasers have the advantages of all-fiber, small size, compact structure, and good beam quality. In 2018, Huaiqin Lin et al. from the University of Southampton in the UK achieved a wavelength of 1610nm, a power of 656W, M 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067G02B6/255
Inventor 杨昌盛李景明徐善辉彭明营冯洲明杨中民
Owner SOUTH CHINA UNIV OF TECH
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