Design of miniaturized optical system for 87Rb atom interferometer
To tackle the challenges of miniaturization and enhanced application reliability in 87Rb atom interferometers,an integrated optical system has been devised.Adopting the philosophy of modular design,the system is divided into three modules:fiber laser,spatial optical path and frequency stabilization,for easy installation and adjustment.By employing self-developed miniaturized optical components and optimizing the design of the spatial optical path and fiber laser,a substantial reduction in the size of the spatial optical path has been achieved,only with dimensions of 120 mm×190 mm×26 mm and a weight of 900 g.The optical path of frequency stabilization just has dimensions of 50 mm×70 mm×40 mm.All optical elements are securely fixed onto the optical baseplate using epoxy resin glue or screws.The design has avoided spring-loaded optical mounts,ensuring stress and thermal stability and effectively enhancing the stability of the spatial optical path.Furthermore,the precise temperature controls have been implemented for both spatial optical path modules.The reliability of the spatial optical path has been further enhanced.During temperature experiment ranging from 0℃ to 40℃,the internal temperature fluctuation is less than 0.1℃,and the peak-to-peak power fluctuation is less than 8％.The integrated optical system achieves a sensitivity of 323.4 μGal/√ Hz@T=20 ms in dynamic atom interferometer and long-term stability of 10.3 μGal@1 000 s.This design provides an effective solution for the miniaturization and practical application of atomic interferometers.
absolute gravity measurementatom interferometerfiber laserspatial optical pathminiaturizationmodulated transfer spectrum frequency stabilization
万方数据
维普
