Single-Fiber Sagnac-Like Interferometer for Optical Rotation Measurement in Atomic Spin Precession Detection

摘要

In this paper, a single-fiber Sagnac-like interferometer is proposed and experimentally demonstrated for detecting atomic spin precession in an atomic magnetometer. The single-fiber Sagnac-like interferometer has a reciprocal optical structure, which is insensitive to environmental disturbances. The fiber system is more flexible for implementation in miniature atomic magnetometers, which has potential for application in magnetoen-cephalography systems. The sensitivity and the bandwidth of the system are also discussed. The thermal and bending disturbances to fiber system are observed, whereas the long-term stability is analyzed and compared with the Faraday modulation scheme.