Integrated single-laser-source optical device for movable cold atom interferometer

Abstract

The invention discloses an integrated single-laser-source optical device for a movable cold atom interferometer, and the device comprises a laser source and a power amplification module which are usedfor generating single-frequency laser; a laser frequency stabilizing and adjusting module which is used for converting the single-frequency laser into seven laser frequencies required by the cold atom interferometer; a laser power stabilization, distribution and time sequence control module which is used for generating various lasers with specific frequency and power according to a time sequence;and a microwave source and electronics control module which is used for carrying out switching and time sequence control on all the modules, wherein the final output light is transmitted to the sensing head module of the atomic interferometer through the four polarization maintaining optical fibers. The device has the advantages of small volume, low power consumption, low cost, high stability andthe like.

Description

technical field [0001] The invention mainly relates to the technical field of cold atom interference precision measurement, in particular to an integrated single laser source optical device for a movable cold atom interferometer. Background technique [0002] The cold atom interferometer is a new generation of high-precision measuring instruments that use atomic matter waves instead of light waves as the measurement medium. Because cold atoms have the characteristics of short de Broglie wavelength, long free evolution time, large static mass, small velocity distribution of atomic groups, and complex internal energy level structure, cold atom interferometry has many intrinsic advantages over laser interferometry in precision measurement. and good technical potential. According to the different directions and modes of interaction between laser and atoms, atomic interference gravimeters, gravity gradiometers, atomic interference gyroscopes, atomic clocks and other precision me...

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Problems solved by technology

Although this method of using multiple semiconductor laser sources combined with an optical phase-locked loop can achieve the required laser frequency and power, the device is still relatively complex, bulky, expensive, and poor in stability; also achieved based on two (Zhang X , Zhong J, Tang B, Chen X, Zhu L, Huang P, Wang J, Zhan M Applied Optics 2018, 57, 6545; O. Carraz, F. Lienhart, R. Charrière, M. Cadoret, N. Zahzam, Y .Bidel, A.Bresson, Appl.Phys.B, 97, 405-411, 2009)) and 1 (Theron F, Carraz O, Renon G, Zahzam N, BidelY, Cadoret M, Bresson A Applied Physics B 2014, 118,1; Luo Q, Zhang H, Zhang K, DuanXC, Hu ZK, Chen LL, Zhou MK Rev Sci Instrum 2019, 90, 043104) Fiber Optics Device for Fiber Laser Source in 1.5μm Communication Band

Although the development of 1.5μm laser sources and fiber optic devices is relatively mature, the complex, inefficient, expensive, and high-power laser frequency doubling modules limit the application range of 1.5μm frequency doubling fiber laser optical devices, and the frequency doubling scheme Only applicable to atoms such as rubidium and potassium, not applicable to other types of alkali metal atoms

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