We observed that the sensitivity of a fiber sensor is changed by introducing fast and slow light. In this fiber sensor configuration, fast and slow light are generated by a double Lorenz fiber Bragg grating (DL-FBG) and the probe pulse through DL-FBG will have different delays by varying the input laser wavelength. The maximum delay is 180 ps (slow light) and the maximum advance is 90 ps (fast light). Experimental result shows that the fiber sensor sensitivity obtains enhancement by introducing slow light, while the sensitivity of fiber sensor decreases when combining with the fast light.

中文翻译：

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在双洛伦兹光纤布拉格光栅中使用快光和慢光控制灵敏度的实验证据

我们观察到，通过引入快慢光会改变光纤传感器的灵敏度。在这种光纤传感器配置中，双劳伦斯光纤布拉格光栅（DL-FBG）会产生快光和慢光，并且通过改变输入激光波长，通过DL-FBG的探测脉冲将具有不同的延迟。最大延迟为180 ps（慢光），最大提前量为90 ps（快光）。实验结果表明，光纤传感器的灵敏度通过引入慢光而得到增强，而光纤传感器的灵敏度与快光结合会降低。