基于氧化石墨烯涂层的侧抛光纤马赫-曾德尔干涉仪温湿度传感器  

Temperature and Humidity Sensor Based on a Graphene Oxide-Coated Side-Polished Fiber Mach-Zehnder Interferometer

作　　者：张平 刘彬[1] 刘正达 刘娟[1] 王梦宇 伏燕军[1] 万生鹏[1] 何兴道[1] 吴强 Zhang Ping;Liu Bin;Liu Zhengda;Liu Juan;Wang Mengyu;Fu Yanjun;Wan Shengpeng;He Xingdao;Wu Qiang(Key Laboratory of Nondestructive Test(Ministry of Education),Nanchang Hangkong University,Nanchang,Jiangxi 330063,China)

机构地区：[1]南昌航空大学无损检测教育部重点实验室,江西南昌330063

出　　处：《光学学报》2021年第3期33-42,共10页Acta Optica Sinica

基　　金：国家自然科学基金(11864025);江西省自然科学基金(20192ACBL21051,20192ACB20031)。

摘　　要：对基于微锥的侧抛光纤马赫-曾德尔干涉仪(MZI)结构进行了理论和实验研究。与传统没有经过侧边抛磨的光纤MZI相比,可以看出控制光纤侧抛深度可以有效地提高MZI结构的折射率传感性能。研究结果表明:侧抛深度达41.7μm时,折射率在1.34附近的传感灵敏度达-117.145 nm/RIU。利用侧抛光纤MZI结构结合亲水性材料氧化石墨烯(GO),通过将其沉积在侧抛光纤MZI表面,实现了对温度和湿度双参量的同时测量。温度和相对湿度(RH)的传感灵敏度分别达131.77 pm/℃和-76.1 pm/%RH。所提侧抛光纤MZI传感器结构具有灵敏度高、低成本和制备简单等优点,在生物化学传感领域具有广泛的应用前景。In this paper, we carried out theoretical and experimental research on the structure of a side-polished fiber Mach-Zehnder interferometer(MZI) based on a microtaper. To be specific, after the side-polished depth of the fiber was appropriately controlled, the refractive index(RI) sensing performance of the MZI was much better than that of a traditional fiber MZI without side polishing. Besides, the research results showed that when the side-polished depth reached 41.7 μm, the sensitivity of RI sensing was-117.145 nm/RIU at the RI of about 1.34. Furthermore, we measured the temperature and humidity simultaneously by depositing the hydrophilic graphene oxide(GO) on the surface of the side-polished fiber MZI, obtaining the sensitivity of temperature and relative humidity sensing of 131.77 pm/℃ and-76.1 pm/%RH, respectively. In conclusion, the proposed side-polished fiber MZI has the advantages of high sensitivity, low cost, and simple fabrication, thus displaying a wide range of application prospects in the field of biochemical sensing.

关 键 词：光纤光学 马赫-曾德干涉仪 侧边抛磨 氧化石墨烯 温湿度传感 

分 类 号：TN25[电子电信—物理电子学]