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Simple hybrid wire-wireless fiber laser sensor by direct photonic generation of beat signal

机译:通过拍频信号直接光子产生的简单混合型有线-无线光纤激光传感器

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摘要

Based on direct photonic generation of a beat signal, a simple hybrid wire-wireless fiber laser sensor is proposed. In the sensor, an improved multilongitudinal modes fiber laser cavity is set up by only a fiber Bragg grating, a section of erbium-doped fiber, and a broadband reflector. A photodetector is used to detect the electrical beat signal. Next, the beat signal including the sensor information can access the wireless network through the wireless transmission. At last, a frequency spectrum analyzer is used to demodulate the sensing information. With this method, the long-distance real-time monitor of the fiber sensor can be realized. The proposed technique offers a simple and cheap way for sensing information of the fiber sensor to access the wireless sensor network. An experiment was implemented to measure the strain and the corresponding root mean square deviation is about -5.7 (mu)(epsilon) at 916 MHz and -3.8 (mu)(epsilon) at 1713 MHz after wireless transmission.
机译:基于拍子信号的直接光子产生,提出了一种简单的混合式有线无线光纤激光传感器。在传感器中,仅通过光纤布拉格光栅,一段掺-光纤和宽带反射器即可建立改进的多纵模光纤激光腔。光电检测器用于检测电拍信号。接下来,包括传感器信息的拍子信号可以通过无线传输访问无线网络。最后,使用频谱分析仪对传感信息进行解调。通过这种方法,可以实现光纤传感器的远程实时监控。所提出的技术提供了一种简单且便宜的方式来感测光纤传感器的信息以访问无线传感器网络。进行了测量应变的实验,无线传输后,相应的均方根偏差在916 MHz下约为-5.7(με),在1713 MHz下约为-3.8(με)。

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