Polarization spectrum frequency stabilization system for inhibiting frequency locking zero drift

Abstract

The invention relates to a polarization spectrum frequency stabilization system for inhibiting frequency locking zero drift. The system comprises a laser device 1, a first lambda / 2 wave plate 2, a first PBS3, a second lambda / 2 wave plate 5, a second PBS6, a first 45-degree reflector 7, a lambda / 4 wave plate 9, a second 45-degree reflector 11, an atomic gas chamber 8 and a first 50:50 non-polarization beam splitter 10, a liquid crystal extender 12, a third PBS20, a second 50: 50 non-polarization beam splitter 21, a third 50:50 non-polarization beam splitter 14, a first differential photoelectric detector 19, a second differential photoelectric detector 15, a first PID23 and a second PID13. The system is advantaged in that on the basis of polarization spectrum frequency stabilization, the zero drift amount of a spectrum is extracted through an optical method, a liquid crystal retarder is fed back and adjusted through a feedback loop, so the center of a spectrum signal is always a lockingzero point, and a problem of large long-term zero drift of polarization spectrum frequency stabilization is solved.

Description

technical field [0001] The invention belongs to the field of atomic physics and relates to a polarization spectrum frequency stabilization technology, in particular to a polarization spectrum frequency stabilization system for suppressing frequency-locking zero-point drift. Background technique [0002] In atomic physics and quantum optics-related research, laser frequency stabilization technology is a necessary means to narrow the laser linewidth and stabilize the laser frequency. Using atomic transition lines, laser frequency stabilization can be achieved. Commonly used laser frequency stabilization methods include saturation absorption spectrum stabilization, polarization spectrum stabilization, two-color spectrum stabilization, modulation transfer spectrum stabilization, and PDH (Pound-Drever-Hall) stabilization. Wait. Among them, polarization spectrum frequency stabilization has been widely used in experiments due to its narrow frequency-locking linewidth, simple opera...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a polarizer that requires fewer components, lower cost, and simple operation, and can solve the problem of poor long-term stability of polarization spectrum frequency stabilization and suppression of frequency-locked zero-point drift. Spectral Frequency Stabilization System

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