A Seed Injection Amplified Ring Cavity Chemical Laser Device

Abstract

The invention relates to a chemical laser device for injecting seeds into an amplified ring cavity. The device is sequentially provided with a plane diffraction grating, a Brewster plate, a gain medium area, a Brewster plate, a plano-concave output mirror, and a plane along the laser output direction. Total reflection mirror, polarizer, 1 / 4 wave plate, plano-concave rear cavity mirror, active medium gain region, planar total reflection mirror, planar total reflection mirror, scraper mirror, plano-convex front cavity mirror. The laser device of the present invention uses the line-selected seed laser to be coupled and injected into the ring unstable cavity chemical laser amplifier through the diffraction grating, and utilizes the competition between the seed laser mode and the cavity mode of the unstable cavity amplifier to realize the impact of the seed laser on the ring unstable cavity amplifier It can realize the line selection output of high-power chemical laser. It has the characteristics of excellent beam quality, high energy, and can realize the line selection output of laser. It can be widely used in laser material processing, laser physics, laser countermeasures and other fields.

Description

technical field [0001] The invention belongs to the field of chemical laser devices, and in particular relates to a seed injection amplifying ring cavity chemical laser. Background technique [0002] Chemical lasers are by far the lasers with the highest output power and output energy among all lasers. Due to its advantages of high power, high efficiency, good amplification performance, and good atmospheric transmission window, it has very broad and important applications in the fields of laser physics, laser chemistry, material processing, and laser countermeasures. At present, many continuous wave chemical lasers such as HF / DF lasers, HBr lasers, etc. have multi-spectral output, but in actual work, the laser is often required to operate at certain wavelengths. In this case, the single-spectrum operation of the laser becomes very meaningful. [0003] The blazed grating can transfer and concentrate the light energy to the first-order spectrum with strong dispersion ability...

AI Technical Summary

Problems solved by technology

Metal substrates, especially water-cooled metal substrate blazed gratings, have high anti-damage properties and can be used in relatively high-power lasers. The power density will still cause irreparable damage to the blazed grating, so that the line selection output of the laser cannot be realized

The line-selection output of high-power lasers can be realized by using the method of seed injection amplification, but since there is no very effective optical isolation system in this wavelength range, the feedback light formed by the standing wave cavity amplifier usually used will still cause damage to the seed laser. damage

Moreover, the intensity noise of the standing wave cavity is large and the threshold is high, which is not conducive to the single-line single-mode operation of the laser.

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