提出由稳频纵向塞曼激光器(SLZL)输出的角频率为ω2和ω1的左、右旋圆偏振激光束的琼斯矢量表示法,并求得外差光纤传感器中参考光束和信号光束拍频光电流的严格公式。这些公式包容了传感器内的各种光学元件对双频左、右旋圆偏振激光束的相位延迟和偏振态改变。它们不仅给出与实验结果符合很好的相位差公式,而且还能说明实验过程中必然出现的一些物理现象和规律。

A representation of the Jones vector for laser beam, which comes from a stabilized longitudinal Zeeman laser with frequencies ω 1 and ω 2 and circular left right handed polarizations, and the rigorous formulas of the beat photocurrents for reference beam and signal beam in the heterodyne optical fiber sensor are presented. These formulas cover all informations of phase delay and change of polarization states for these beams caused by all optical elements in the sensing system. Therefore, they can give phase difference formula fitting well with experimental results, and can also be used for explaination of some physical phenomena occured in experiments.