Large-power pulse air-flow chemical laser apparatus

Abstract

The invention discloses a large-power pulse air-flow chemical laser apparatus. The apparatus is successively provided with a flat concave reflector, an electro-optical adjusting Q crystal, a polarizer, a flat concave output coupling mirror, a planar holophote, a telescope system, an optical isolation system, a flat concave back-cavity mirror, an activation medium gain region, a scraper mirror and a flat convex front-cavity mirror along the advancing direction of output laser. According to the utility model, the laser gain medium in the same gain region is utilized, and through electro-optical adjusting Q pulse laser amplification, large-power pulse oxygen-iodine chemical pulse output can be obtained. Besides, the large-power pulse air-flow chemical laser apparatus has the advantages of compact structure, high energy, high repetition frequency, narrow pulse width, high efficiency, good light beam quality and the like, thereby being widely applied to such fields as laser material processing, underwater operation, mining industry exploitation and the like.

Description

technical field [0001] The invention belongs to the field of chemical laser devices, in particular to an electro-optic Q-switched laser unsteady cavity amplified pulse gas flow chemical laser. Background technique [0002] Pneumatic chemical lasers have the advantages of high power, high efficiency, low-loss optical fiber transmission, and better atmospheric transmission window, and are widely used in industrial, medical, scientific research and other fields. Current high-power oxygen-iodine lasers usually operate in continuous wave, which causes plasma and nonlinear effects to be formed on the surface of the material when the laser interacts with the material, which affects the penetration depth and speed of the laser. If the laser can operate at high repetition rate and high peak power with low average power loss, it can produce new effects such as reducing the thickness of the plasma screen generated when the laser interacts with the material, weakening thermal radiation ...

AI Technical Summary

Problems solved by technology

In photo-induced and electrically induced pulsed chemical lasers, it is difficult to obtain high-energy, high-repetition-frequency pulsed laser output by using these two methods because it is difficult to achieve high repetition rate, large-volume uniform glow discharge and light irradiation.

The output of pulsed laser can be realized by modulating the resonant cavity loss. In high-power chemical lasers, due to their large aperture and high power density in the cavity, only mechanical modulation can be used, but the modulation depth of this method is Very low, and will greatly reduce the average power of the output laser

Another method is to modulate the gain of the active medium, for example, using an external strong magnetic field to modulate the gain of the active medium, but the device to realize this modulation is very large, and each work can only obtain a repetition frequency of the order of Hz hundreds of laser pulses

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