Dual-cavity dual-frequency solid-state laser pound-drever-hall frequency stabilization system

Abstract

A Pound-Drever-Hall frequency stabilizing system of a dual-cavity dual-frequency solid laser device comprises the dual-cavity dual-frequency solid laser device, two independent heterodyne interferometer systems, two frequency regulators and an F-P (Fabry-Perot) optical resonant cavity. The optical resonant cavity is used as frequency stabilizing reference, the two independent heterodyne interferometer systems are used for detection to obtain two channels of error signals, the two frequency regulators are driven, and two working frequencies of the dual-cavity dual-frequency solid laser device are simultaneously locked at two resonance frequencies of the F-P optical resonant cavity. The F-P optical resonant cavity is used as the frequency stabilizing reference, the two working frequencies of the dual-cavity dual-frequency solid laser device are stabilized simultaneously, the laser frequency stability is higher than 10<-10>, and the Pound-Drever-Hall frequency stabilizing system can be widely applied to fields of interferometry for absolute distances of synthesis waves, generation of THz waves and the like.

Description

technical field [0001] The invention relates to a Pound-Drever-Hall frequency stabilization system for a double-cavity double-frequency solid-state laser. Background technique [0002] Laser active frequency stabilization technology is mainly divided into two types: one is based on the center frequency of the transition line of atoms or molecules as a reference standard, commonly used methods include Lamb sag frequency stabilization, atomic spectrum Zeeman effect frequency stabilization, atomic or molecular saturation absorption Frequency stabilization; the second is to use the resonant frequency of the resonant cavity as a reference standard. Commonly used methods include phase offset frequency locking technology, derivative spectrum frequency stabilization technology and edge frequency locking frequency stabilization technology. [0003] The frequency stabilization device of the Lamb sag frequency stabilization method is relatively simple, but the center frequency of the g...

AI Technical Summary

Problems solved by technology

In addition, the existing Pound-Drever-Hall frequency stabilization system is implemented by analog electronic devices, and analog mixers, filters and amplifiers are required in the process of error signal demodulation and frequency discrimination curve generation etc., will introduce electronic noise and flicker effect noise

When the error signal is demodulated into a DC signal, these noises will affect it and finally affect the laser output frequency stability through the feedback system

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