Atomic Doppler broadened peak laser frequency-locking device and frequency-locked laser including it

Abstract

The invention provides an atomic Doppler broadening peak laser frequency locking device and a frequency locking laser comprising the same. The atomic Doppler broadening peak laser frequency locking device comprises: a beam splitting device used for splitting a laser emitted by a tunable laser to a first laser; an atomic gas chamber located on the optical path of the first laser; a photodetector used for converting the first laser transmitted from the atomic gas chamber to electric signals; a phase-locked amplifier used for receiving the electric signals output by the photodetector and outputting error signals; and a negative feedback controller used for locking the frequency of the laser emitted by the tunable laser according to the error signals output by the phase-locked amplifier. The frequency locking device has the advantages that the optical path is relatively simple, no large power consumption equipment is used, and the stability and the operability are greatly improved, the construction of the optical path is simpler, the cost is reduced, and favorable conditions are provided for industrialization.

Description

technical field [0001] The invention relates to the field of lasers, in particular to an atomic Doppler broadening peak laser frequency locking device and a frequency locking laser comprising the same. Background technique [0002] In the experimental research of atomic physics and the development of precision instruments, the key technology is to lock the frequency of the laser on the spectral line of the selected atom. [0003] At present, there are mainly two laser frequency locking schemes, one is a Doppler linewidth saturation absorption frequency locking device, and the other is a Dichroic Atomic Vapor Laser Lock (DAVLL, a dichroic atomic vapor laser frequency locking device). [0004] figure 1 It is a structural schematic diagram of a Doppler linewidth saturable absorption frequency locking device in the prior art. Such as figure 1 As shown, the laser light emitted by the external cavity semiconductor laser 11 is incident on the polarization beam splitting prism 12...

AI Technical Summary

Problems solved by technology

Since DAVLL needs a strong magnetic field on the order of 100 to 1000 Gauss to generate Zeeman splitting, it puts forward very high requirements for coil winding, heat dissipation and power supply, and requires high-power consumption equipment to realize it, which is not conducive to the system. miniaturization and integration

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