Cold atom interferometer single laser light source system

Abstract

The invention provides a single-laser light source system of a cold atom interferometer. The single-laser light source system comprises a reference light path module and an optical frequency shift module; the reference light path module comprises a narrow bandwidth laser and a frequency stabilization module; the optical frequency shift module comprises a first electro-optical modulator and a firstnarrow bandwidth optical fiber filter, and the first electro-optical modulator is connected with the first narrow bandwidth optical fiber filter through an optical fiber; the first electro-optical modulator is connected with the laser through an optical fiber; the first electro-optical modulator receives initial light of a laser source, modulates the initial light through a modulation signal of apreset frequency, and generates a sideband of the preset frequency. The first narrow bandwidth optical fiber filter filters the optical signal output by the electro-optical modulator to obtain frequency shift light of a + 1-order sideband; the frequency shift light is used for modulating to obtain measurement and control light of cold atoms related to the instrument. The laser system is low in cost, low in power consumption, movable, small in size and capable of eliminating the Raman sideband effect.

Description

technical field [0001] The invention belongs to the field of quantum precision measurement based on cold atom interference technology, in particular to a cold atom interferometer single laser light source system. Background technique [0002] Atom interferometry uses the characteristics of atomic matter waves as a research method, and is widely used in the field of precision measurement, such as high-precision measurement of physical quantities such as rotational angular velocity, gravitational acceleration, and gravitational constant. In the cold atom interferometer, cold atoms are used as the measurement sensitive medium. Compared with other measurement methods such as optical interference, cold atoms have the advantages of long free evolution time, small atomic group velocity distribution, short de Broglie wavelength and large relative mass. , so that the cold atom interference has better coherence in space and velocity distribution, and thus has higher measurement sensit...

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