Active illumination beacon system based on alkali metal vapor laser

Abstract

The invention belongs to the field of adaptive optics, and specifically relates to an active illumination beacon system which uses a high-power single-frequency alkali metal vapor laser as a laser source and amplifies weak beacon light in a phase preserving manner by using the nonlinear effect of alkali metal vapor. The active illumination beacon system comprises a high-power single-frequency alkali metal vapor laser, an illumination light emitting and beacon light receiving device, a beacon light amplifying device and an amplified beacon light receiving device. The wavelength of the illumination laser is just close to an 'atmospheric window' and a peak value of a response curve of a CCD image sensor, and the detection efficiency is improved by nearly 10 times compared with that of a traditional active illumination beacon system. Beacon light can be amplified by several times to hundreds of times by utilizing the nonlinear effect in alkali metal vapor. Meanwhile, the single-frequency optical power of the alkali metal vapor laser serving as a potential high-power laser scheme is expected to reach the order of kilowatts to ten thousands of watts. By applying the scheme, the problemsexisting in a traditional active illumination beacon system can be solved, and the tracking and transmission effects of a high-energy laser system are greatly improved.

Description

technical field [0001] The invention belongs to the field of adaptive optics, and in particular relates to an active lighting beacon system which uses a high-power single-frequency alkali metal vapor laser as a laser source and utilizes the nonlinear effect of the alkali metal vapor to perform phase-preserving amplification on weak beacon return light. Background technique [0002] With the rapid development of laser technology, due to the advantages of fast transmission speed, high precision, long range, and strong flexibility, high-energy laser systems have been paid more and more attention to the application of target interception and space junk cleaning. Typical features are long distance, small target, and self-illumination. The high-energy laser system is mainly composed of a high-energy laser, a precision aiming and tracking system, and a beam control and emission system. The high-energy laser is used to generate a high-energy laser beam; the precision aiming and tra...

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Problems solved by technology

[0006] In order to solve the problems of insufficient lighting brightness and low detection efficiency of the CCD image sensor in the traditional active lighting beacon system, the present invention proposes a high-power single-frequency alkali metal vapor laser as the laser source, and utilizes the nonlinear e

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