We developed a vibration measurement system by fiber Bragg gratings (FBGs) with a pulse light. The pulse light is produced by modulating a broadband light with an optical fiber switch at a modulation frequency of 40 kHz. This system enables to separate and detect reflection signals from multiple FBGs like a pulse train. This system achieves multipoint and real‐time vibration measurement by FBGs with a time resolution of 25 µs.

中文翻译：

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用脉冲光的光纤布拉格光栅开发实时振动测量系统

我们开发了带有脉冲光的光纤布拉格光栅（FBG）的振动测量系统。通过使用光纤开关以40 kHz的调制频率调制宽带光来产生脉冲光。该系统能够分离和检测来自多个FBG（如脉冲序列）的反射信号。该系统可通过FBG实现25 µs的时间分辨率的多点实时振动测量。