High-stability polarization spectrum frequency stabilizing device

Abstract

The invention relates to the technical field of laser frequency stabilization, in particular to a high-stability polarization spectrum frequency stabilization device suitable for polarization spectrumfrequency stabilization. According to the invention, the problem that the line type of a frequency discrimination curve (or a polarization spectrum) in the existing polarization spectrum frequency stabilization technology is easily influenced by output laser power fluctuation, optical element vibration and laser polarization change is solved; the intensity of two weak light beams needing to be detected in the polarization spectrum is stabilized through the feedback circuit, so that the frequency discrimination curve lines are the same during each time of frequency stabilization, and the absolute precision of frequency locking of the polarization spectrum is improved. The high-stability polarization spectrum frequency stabilizing device comprises a semiconductor laser, a shaping prism, a half-wave plate, a polarization splitting prism (polarization splitting prism), a convex lens, an acoustic optical modulator, a radio frequency signal generator, a power amplifier, a quarter-wave plate, a reflector, a single-channel photoelectric detector, an atomic vapor bubble, a light blocking block, a balance photoelectric detector and a feedback circuit.

Description

technical field [0001] The invention relates to the technical field of laser frequency stabilization, in particular to a highly stable polarization spectrum frequency stabilization device suitable for polarization spectrum frequency stabilization. Background technique [0002] With the rapid development of laser technology, lasers have been widely used in many fields of precision measurement, laser communication, lidar and cold atomic clocks. The stability of laser output laser frequency is an extremely important indicator. Laser frequency stabilization has become an important research content of laser technology and plays a vital role in scientific research and application fields. Generally, when the laser is affected by the surrounding environment, such as ambient temperature and mechanical vibration, the resonant cavity and working current of the laser will change, resulting in instability of the output laser frequency of the laser. Currently, the main methods used to st...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of the linear change of the frequency discrimination curve caused by the unstable laser light intensity used for polarization spectrum frequency stabilization, the present invention provides a device for generating stable polarization spectrum suitable for polarization spectrum frequency stabilization

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