利用恒温控制平台,通过测量干涉光电流和干涉仪两臂光电流的方法,实现了对全光纤干涉仪两臂初相位差的测量。这种方法不同于传统的步进相移法,不需使用压电晶体(PZT)等移相器,操作简单。实验结果有很好的重复性,精度约为0.04°。
The initial phase difference of the fiber interferometer is calculated by measuring the interference photocurrent and the photocurrents from the two fiber arms based on a temperature control plat. This method is easy to operate without using the phase shifer as lead zirconate titanate(PZT) which must be used in traditional phase shifting interferometry(PSI). The experiment data are repeatable and the measurement precision is about 0.04°.