基于光纤延迟线的时间抖动测量系统

对飞秒激光器时间抖动的准确测量是推动其高精度应用的重要前提。为实现时间抖动的高精度、无参考测量，设计并搭建了一套基于光纤延迟线的测量系统。基于非对称迈克尔逊干涉仪的结构，在其中一臂引入一段长光纤延迟线鉴别时间误差，提高时间抖动测量精度。测量了一台实验室自制的重复频率为82 MHz的锁模光纤激光器的时间抖动功率谱，其在100 Hz~10 kHz的积分范围内RMS时间抖动为10.1 fs。

Timing jitter measurement system based on fiber delay line

Accurate measurement of the timing jitter of femtosecond laser is an important prerequisite to promote its high-precision application. In order to achieve high-precision and no-reference measurement of timing jitter, a measurement system based on fiber delay line was designed and built. Based on the structure of asymmetric Michelson interferometer, a long fiber delay line is added into one arm to identify the time error and improve the measurement accuracy of timing jitter. The timing jitter power spectrum of a lab-made mode-locked fiber laser with a repetition rate of 82 MHz was measured, and the RMS timing jitter was 10.1 fs in the integrated range of 100 Hz to 10 kHz.