589 nm laser based on raman frequency conversion and laser sum frequency

Abstract

Provided is a 589 nm laser based on raman frequency conversion and laser sum frequency. The 589 nm laser based on the raman frequency conversion and the laser sum frequency is composed of a 1064 nm laser source, a faraday isolator, a half slide, a beam split element, a front cavity mirror of a first raman resonant cavity, a tungstic acid gadolinium potassium crystal, a rear cavity mirror of the first raman resonant cavity, a first filtering lens, a first reflecting mirror, a front cavity mirror of a second raman resonant cavity, a barium nitrate crystal, a rear cavity mirror of the second raman resonant cavity, a second filtering lens, a second reflecting mirror, a nonlinear crystal and a third filtering lens. According to the 589 nm laser based on the raman frequency conversion and the laser sum frequency, the structure is simple, synchronization is easy to realize, the obtained 589 nm can be used for generating sodium guide stars, and the 589 nm laser based on the raman frequency and the laser sum frequency has an important significance in fields of astronomy, national defense and the like.

Description

technical field [0001] The invention belongs to the technical field of solid lasers, in particular to a 589nm laser based on Raman frequency conversion and laser sum frequency. Background technique [0002] When large-scale telescopes observe celestial bodies, due to disturbances such as atmospheric turbulence, the resolution of imaging is greatly reduced. These influencing factors can be corrected through adaptive technology, thereby improving the resolution of imaging. When correcting with adaptive optics, a guide star, also known as a beacon, is required to generate a strong light source at a certain height from the ground, and use the light signal of the guide star as a wavefront standard to measure the phase distortion produced by the atmosphere Signal to obtain the error signal, so as to achieve adaptive correction. As an artificial beacon, the sodium beacon is produced by lasers used to excite sodium atoms in the atmospheric ionosphere at an altitude of 80-100 km, ca...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a 589nm laser based on Raman frequency conversion and laser sum frequency in order to solve the problems of complex structure and high cost in the prior art sodium yellow light output technology

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