基于复合干涉仪的双参量传感器

Double-Parameter Sensor based on Composite Interference Structure

鉴于对温度和折射率双参量同时监测的必要性,设计并实验研究了一种基于复合干涉仪结构的双参量传感器。通过级联单模光纤-空芯光纤-光子晶体光纤,同时形成了一个法布里-珀罗干涉仪和一个马赫-曾德干涉仪。通过同时观测反射光谱和透射光谱的变化,可以同时监测温度和折射率两种参量的变化。利用透射谱对折射率的敏感性和反射谱对温度的敏感性,通过实验测得该传感器的折射率灵敏度和温度灵敏度分别为127.46nm/RIU和52.3pm/℃,表明该传感器可以对环境折射率和温度同时进行监测,具有实际应用价值。

Due to the necessity of simultaneous monitoring of temperature and refractive index,a novel double-parameter sensor based on a composite interference structure has been proposed and demonstrated in this letter.Through cascading Single Mode Fiber(SMF)-Hollow Core Fiber(HCF)-Photonic Crystal Fiber(PCF),a Fabry-Pérot Interferometer(FPI)and a Mach-Zehnder Interferometer(MZI)are formed simultaneously.Therefore,the change of temperature and Environmental Refractive Index(ERI)can be monitored at the same time by observing the movement of reflection and transmission spectra.The sensitivities of refractive index and temperature can reach up to 127.46 nm/RIU and 52.3 pm/℃,respectively.It is shown certain practical application value by monitoring the environmental refractive index and temperature at the same time.