Double-laser system for precision measurement of cold atom interferometry

Abstract

The invention provides a double-laser system for precision measurement of cold atom interferometry. The system comprises a master laser, a master laser frequency stabilizing module, a first beam splitting module and a first frequency shift and beam splitting unit which are used for supplying back pumping light and raman master laser. The system further comprises a slave laser, a slave laser lock phase frequency stabilizing module, a second beam splitting module, a laser amplifier and a second frequency shift and beam splitting unit which are used for supplying raman slave laser, cooling light,detecting light, cleaning light and state preparation light; the raman master laser and the reman slave laser are utilized for producing reman laser through a raman light frequency shift unit. The system is simple, compact and stable in structure, novel and flexible in frequency regulation, and applicable to miniaturization, engineering and productization, and particularly supplies laser solutions to cold atom interferometry based absolute gravimeters, gradometers, gyroscopes and the like.

Description

technical field [0001] The present disclosure relates to the technical field of laser frequency control, in particular to a dual laser system suitable for precise measurement of cold atom interference. Background technique [0002] With the continuous development and maturity of cold atom technology, its application potential in the field of precision measurement has attracted more and more attention. Among them, precision measurement based on cold atom interferometry is one of the representatives. Cold atom interferometry requires lasers of various frequencies to achieve such things as atom cooling and trapping, atomic energy state preparation, Raman interferometry, and atomic fluorescence detection. The required lasers generally include cooling light, back pumping light, Raman light, and probe light. For the all-optical cold atom interference gravimeter, additional state preparation light and scavenging light are needed to cooperate with the existing Raman light and back...

AI Technical Summary

Problems solved by technology

In order to obtain these lasers, the usual laser solution needs to use more than 3 lasers, which not only increases the complexity of the laser frequency stabilization and phase-locking system, but also makes the optical path system too large, which is not conducive to miniaturization and poor anti-interference ability

At the same time, in order to obtain the laser at the required frequency, the specifications and quantities of the frequency shifting devices used in the optical system of the laser solution are usually more and more complex, which increases the complexity of the driving system of the frequency shifting device and also increases the complexity of the frequency shifting device drive system. Increased system instability

These deficiencies and defects seriously restrict the practical and engineering realization of cold atom interferometry

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