Geng Y, Wang L, Xu Y, Kumar A G, Tan X, Li X
Opt Express. 2018 Oct 15;26(21):27907-27916. doi: 10.1364/OE.26.027907.
A fiber temperature sensor based on four-wave mixing (FWM) with an oil-filled photonic crystal fiber (PCF) is proposed in this study, and a multipoint measurement based on the wavelength multiplexing of such sensors is constructed for the first time. The sensing performance and signal spectral characteristics of the temperature sensor are theoretically and experimentally studied. The maximum temperature sensitivity of the signal light of 0.207 nm/°C is achieved using a FWM sensing fiber with a length of 10 cm. The signal wavelength response to excitation power is also explored in this experiment. Results showed that the temperature sensor is relatively insensitive to the fluctuation of power change. The wavelength multiplexing of a FWM-based PCF temperature sensor also presents the possibility of multiplexing measurement and multipoint sensing, and high multiplexed capability is theoretically predicted to be obtainable with optimized sensitivity and splicing loss.
本研究提出了一种基于四波混频（FWM）的光纤温度传感器，该传感器采用充油光子晶体光纤（PCF），并首次构建了基于此类传感器波长复用的多点测量系统。对温度传感器的传感性能和信号光谱特性进行了理论和实验研究。使用长度为10 cm的FWM传感光纤，信号光的最大温度灵敏度达到0.207 nm/°C。本实验还探讨了信号波长对激发功率的响应。结果表明，温度传感器对功率变化的波动相对不敏感。基于FWM的PCF温度传感器的波长复用也为复用测量和多点传感提供了可能性，理论预测通过优化灵敏度和熔接损耗可获得高复用能力。
