Provided is a chromatic dispersion measurement device including a light branching unit that divides a incident measured light signal into a first measured light signal and a second measured light signal and causes a frequency difference between the first measured light signal and the second measured light signal when the signals are output, an optical phase shifter provided in either one of the first branch path and the second branch path having a polarization maintaining characteristic and periodically changing a phase αi of the measured light signal, an optical combination unit that combines the first measured light signal and the second measured light signal and outputs an interference element of an i-th optical component obtained by interference of the first measured light signal and the second measured light signal when the phase difference is the phase αi, as a combined measured light signal.
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机译：提供了一种色散测量装置，其包括光分支单元，该光分支单元将入射的测量光信号分成第一测量光信号和第二测量光信号，并且当所述第二测量光信号与所述第二测量光信号之间产生频率差。输出信号，在第一分支路径和第二分支路径中的任一个中提供的光学移相器具有偏振保持特性并且周期性地改变所测量的光信号的相位α i ，光学组合单元，其组合第一测量光信号和第二测量光信号，并且当相位差为相位α<时，输出通过第一测量光信号和第二测量光信号的干涉而获得的第i光学组件的干涉元件。 Sub> i ，作为组合的测量光信号。
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