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

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 ...

AI Technical Summary

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.

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