671 nm laser light system used for cold atom experiments

Abstract

The invention discloses a 671 nm laser light system used for cold atom experiments. The laser light system comprises a seed laser, a pumping source, an optical resonant cavity, a laser crystal, a frequency doubling crystal and a frequency locking module; the laser crystal and the frequency doubling crystal are located in the optical resonant cavity; the pumping source is used for outputting pumping light; the seed laser is used for outputting seed light; fundamental frequency laser light having the same wave length as the seed light is generated inside the laser crystal after the pumping light enters the optical resonant cavity; the seed light and the fundamental frequency laser light are oscillated in the optical resonant cavity, and are subjected to the frequency doubling processing of the frequency doubling crystal and the frequency locking processing of the frequency locking module to form target single frequency laser light with a predetermined wave length. The technical solution of the invention adopts an injection locking intracavity frequency doubling technique, to realize an output of high-power single frequency 671 nm laser light with an adjustable frequency and a simple-structured cavity, which is easy to realize and can be directly used for cold atom physical experiments.

Description

Technical field [0001] The present invention relates to the field of laser technology, and more specifically, to a 671nm laser system for cold atom experiments. Background technique [0002] In recent years, cold atom physics experiments have increasingly become one of the hot research fields in physics. Lithium (Li) atoms are one of the best choices for cold atom experiments to study quantum gases. The study requires the use of a 671nm laser that resonates with the D line of Li atoms to cool the atoms. In order to achieve as many quantum degenerate gases as possible, experiments generally require high-power single-frequency lasers of the order of watts and above. At the same time, the frequency of the laser needs to be tunable, capable of saturation absorption and frequency stabilization. At present, the commercial single-frequency tunable 671nm laser used in the experiment generally has a low output power, which cannot meet the increasing demands of the experiment. [0003] Rec...

AI Technical Summary

Problems solved by technology

A known injection-locked intracavity frequency-doubling laser is disclosed in the existing patent literature disclosed in Chinese patent CN105449511A. The annular cavity of the injection-locked intracavity frequency-doubling laser is composed of six cavity mirrors, and the number of cavity mirrors is large. Causes increased loss and increases cost and instability

[0005] From the above description, it can be known that no 671nm laser based on injection-locked intracavity frequency doubling technology has been reported

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