Compact solid-state laser for laser ranging in space high-orbit environment

Abstract

The invention relates to a compact solid-state laser for laser ranging in a space high-orbit environment, which belongs to the technical field of solid-state lasers. Double-layer metal seal is designed to carry out vacuum degassing on components and raw materials in all aspects of installation and adjustment and isolate optical components and electronic components in the laser. The chance of pollution damage, which is caused by high vacuum and weightlessness, of the laser is reduced. Anti-irradiation strengthening is carried out on the laser casing, and electrostatic sensitive devices are effectively isolated. The probability that the laser casing and sensitive devices are damaged due to irradiation charging of plasma and high-energy electrons is reduced. Anti-irradiation laser crystals are used with a structural reinforcement technology to reduce the chance of laser component failure caused by total dose irradiation of high-energy particles. A virtual confocal unstable cavity and a multi-component integrated design technology are used to make the size of the laser highly compact.

Description

technical field [0001] The invention relates to a compact solid-state laser used in space high-orbit environment laser ranging, and belongs to the technical field of solid-state lasers. Background technique [0002] Laser ranging is a technology that enables high-precision distance detection. The detection principle of the laser range finder is to use the laser light source to emit the detection laser to the target, and the photoelectric element receives the laser beam emitted by the target, and the timer measures the time from the emission to the reception of the laser beam, and calculates the distance from the observer to the target. The distance detection accuracy can reach more than 0.1m. [0003] As the laser source of the laser rangefinder, there are semiconductor lasers, fiber lasers, solid-state lasers, etc. For inter-satellite distance detection of 100km, solid-state lasers that can emit high peak power lasers are usually used. A solid-state laser is a laser that ...

AI Technical Summary

Problems solved by technology

Vacuum may cause vacuum discharge to damage components, and may also cause non-metallic components to volatilize condensable volatiles, which condense on the film of optical components and cause damage to laser components; weightlessness will cause dust particles inside the optical cavity to be suspended in the optical path, This makes the laser more prone to damage; plasma and high-energy electron irradiation will charge the outer surface of the laser, and then discharge with the electrode of the internal static-sensitive core component Laser Diode Array (LDA), thereby causing breakdown damage; The irradiation of high-energy particles from the sun may modify the laser crystal and Q-switched crystal, thereby reducing the output energy. Especially in the high-orbit environment, the total radiation dose is relatively large, and the above phenomenon is more likely to occur

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