Optical-pumping intermediate infrared gas laser device

Abstract

The invention belongs to the technical field of laser devices, and discloses an optical-pumping intermediate infrared gas laser device. The laser device comprises a pumping source, gain media and a resonant cavity, wherein the pumping source comprises an optical seed source, a frequency stabilization device and optical cascade amplifiers; the gain media are HBr or mixed gas formed by other gas such as DF, HF, CO and CO2 and inert gas; the resonant cavity consists of a pumping input mirror and a laser output mirror; seed light can be split by the pumping source, and passes through the optical cascade amplifiers respectively, so that the pumping power is improved; 2-micrometer laser generated by the seed source can be aligned to absorption lines of the gain media, so that overtone pumping is achieved; an HBr gas molecule in an excited state generates fundamental frequency transition; and 4-micrometer intermediate infrared laser is outputted. The laser device is compact in structure, high in expansibility and easy in heat dissipation, and can achieve a high power output of the intermediate infrared laser.

Description

technical field [0001] The invention belongs to the technical field of lasers, and relates to a novel high-energy fiber-pumped mid-infrared gas laser using a fiber laser as a pumping source and gas as a gain medium. Background technique [0002] For a long time, the attenuation of laser absorption and scattering by the atmosphere is the key factor restricting the long-distance transmission of high-energy laser. The mid-infrared laser light source of 2-5 μm has attracted the attention of high-energy laser research institutions at home and abroad because its laser wavelength falls in the atmospheric window and can achieve long-distance transmission in the atmosphere. Pollution detection and other technical fields. At present, the laser light sources that can achieve mid-infrared laser output mainly include HF / DF chemical lasers, solid-state lasers, optical parametric oscillation lasers, and photonic crystal fiber lasers. Although chemical lasers can achieve high-power mid-in...

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Problems solved by technology

Although chemical lasers can achieve high-power mid-infrared laser output, their bulky practical applications are greatly limited; due to the inability to overcome the problem of beam quality deterioration caused by the thermal effect of solid gain media at high power, solid-state lasers are currently not An effective way to realize high-energy laser; although the optical parametric oscillator laser is a better way to realize the mid-infrared output, but because the optical parametric oscillator laser needs to realize the mid-infrared laser output thr

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