公开(公告)号：US20230299553A1

公开(公告)日：2023-09-21

申请号：US18020949

申请日：2020-11-24

申请人： NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY

发明人： Jun YANG ,  Guochao WANG ,  Lingxiao ZHU ,  Shuhua YAN ,  Xiye GUO ,  Yaning WANG ,  Aiai JIA ,  Mengjie LV ,  Dongyang XU ,  Xu ZHANG ,  Huankai ZHANG ,  Xiao YU

IPC分类号： H01S3/30 ,  G01C19/66 ,  H01S3/00

CPC分类号： H01S3/302 ,  G01C19/661 ,  H01S3/0085 ,  H01S3/0092

摘要： A method and a system for generating single-sideband Raman light for cold atom interferometer through phase modulation are provided. The system includes a laser, an electro-optic modulator (EOM), a local microwave oscillator, a narrow-bandwidth optical-fiber filter, an optical-fiber power amplifier and a frequency doubling crystal. The laser has frequency of ω and is input to the EOM. The local microwave oscillator applies a modulation voltage with frequency of δ to the EOM and generate double-sideband frequency-modulated light with frequencies of ω±nδ(n=0,1,2, . . . ). This light is filtered by the narrow-bandwidth optical-fiber filter, which outputs the target frequency light and is successively input to the optical-fiber power amplifier and the frequency doubling crystal and yields the single-sideband Raman light for cold atom interferometer. The Raman light generation system has simple structure, low-cost, high integration level, easy implementation, high maturity and good stability, and has practical significance in realizing an engineering-based laser system for high-precision atom interferometer measurement.

公开(公告)号：US20230228555A1

公开(公告)日：2023-07-20

申请号：US18012946

申请日：2020-11-24

申请人： NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY

发明人： Jun YANG ,  Guochao WANG ,  Shuhua YAN ,  Lingxiao ZHU ,  Xiye GUO ,  Yaning WANG ,  Aiai JIA ,  Mengjie LV ,  Dongyang XU ,  Qixue LI ,  Mingyue YANG ,  Jie WANG

IPC分类号： G01B9/02015 ,  H01S3/067 ,  H01S3/16 ,  H01S3/08 ,  H01S3/136 ,  H01S3/107 ,  H01S3/109 ,  H01S3/30 ,  H01S3/13

CPC分类号： G01B9/02015 ,  H01S3/06791 ,  H01S3/1608 ,  H01S3/08013 ,  H01S3/136 ,  H01S3/107 ,  H01S3/109 ,  H01S3/302 ,  H01S3/13013

摘要： A single-laser light source system for cold atom interferometers, comprising: a reference light module including a narrow-bandwidth laser and a frequency stabilization module and an optical frequency shift module including a first electro-optic modulator and a first narrow-bandwidth optical-fiber filter. The first electro-optic modulator is connected to the first narrow-bandwidth optical-fiber filter by an optical fiber, and the first electro-optic modulator is connected to the laser by an optical fiber. The first electro-optic modulator receives an initial light from the laser, modulates the initial light by a modulation signal with a preset frequency, and generates sidebands with the preset frequency. The first narrow-bandwidth optical-fiber filter filters the optical signal at the output of the first electro-optic modulator to obtain a frequency-shifted light as the +1-order sideband. The frequency-shifted light is used for modulation to obtain a measurement and control light of the cold atom interferometer.