基于光子晶体光纤法布里-珀罗干涉仪的温度自补偿折射率计  

Refractive-Index Sensor Based on Photonic Crystal Fiber Fabry-Pérot Interferometer with Self Temperature Compensation

作　　者：邓明[1] 饶云江[1,2] 朱涛[1,2] 段德稳[1] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044 [2]成都电子科技大学宽带光纤传输与通信系统技术教育部重点实验室,四川成都610054

出　　处：《光学学报》2009年第7期1790-1795,共6页Acta Optica Sinica

基　　金：国家自然科学重点基金及青年基金(60537040;60807019);重庆市自然科学基金(CSTC2008BB2165);重庆大 学创新能力培育基金资助课题

摘　　要：采用手动熔接实芯光子晶体光纤和普通单模光纤制作本征法布里-珀罗(Fabry-Pérot,F-P)干涉传感器的方法,提出了一种可实现温度自补偿的高灵敏度折射率计。理论与实验表明,新型F-P干涉传感器的对比度不受环境温度影响只随着外界折射率的变化而变化,当外界折射率在1.32～1.44范围内变化时,其折射率灵敏度约为4.59/RIU,分辨率约为2×10-5。此外,该传感器的腔长具有较高的温度灵敏度,在20～100℃范围内,其温度灵敏度为18.72 nm/℃。因此,可以通过同时监测该传感器对比度和腔长的变化就可以实现折射率和温度的同时测量,在实际工业应用中具有广泛的应用前景。A novel fiber-optic Fabry-Perot refractive-index sensor is proposed, which is formed by a section of endlessly single-mode photonic crystal fiber （EPCF） and conventional single-mode fiber. The theoretical and experimental results show that the refractive-index measurement based on the fringe visibility is independent of temperature change, and the refractive-index resolution and sensitivity are about 2 ×10^-5and 4. 59/RIU, respectively, when the refractive index of the environment is in the range of 1. 3241.44. In addition, such a sensor can be used as an excellent temperature sensor with a cavity-length-temperature sensitivity of 18.72 nm/℃ with temperature ranging from 20℃to 100℃. Therefore, simultaneous measurement of refractive index and temperature can be realized by determination of the fringe visibility and the cavity length change of such anEPCF-based IFPI, respectively. It provides a practical way to measure refractive index with self temperature compensation.

关 键 词：光纤光学 光纤传感器 折射率测量 温度补偿 法布里-珀罗干涉仪 光子晶体光纤 

分 类 号：TN253[电子电信—物理电子学]