基于微纳光纤干涉仪的光纤环形激光传感器及硝酸钆高灵敏检测  

Fiber Ring Laser Sensor Based on Micro-Nano Fiber Interferometer and Highly Sensitive Detection of Gadolinium Nitrate

作　　者：伯婉 王梦宇 曾思藩 何兴道[1] 吴强 刘彬[1] Bo Wan;Wang Mengyu;Zeng Sifan;He Xingdao;Wu Qiang;Liu Bin(Key Laboratory of Nondestructive Testing(Ministry of Education),Nanchang Hangkong University,Nanchang 330063,Jiangxi,China;Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,江西南昌330063 [2]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《激光与光电子学进展》2023年第5期323-329,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11864025,22106151,62065013);江西省自然科学基金(20212BAB202024)。

摘　　要：为了对硝酸钆进行高灵敏检测,研究一种基于微纳光纤干涉仪的光纤环腔激光传感器。制备了一种具有双锥结构的微纳光纤干涉仪,微纳光纤的强倏逝场可与外界环境或周围介质发生有效相互作用,且倏逝场随着光纤双锥结构直径的减小不断增强,折射率传感的灵敏度指标也有显著提高。实验结果表明:当微纳光纤的直径为20μm时,传感器的折射率灵敏度达1925 nm/RIU;对于硝酸钆溶液的质量浓度,该传感器的灵敏度高达0.172 nm/(mg·mL^(-1))。此外,该光纤环形激光传感器具有灵敏度高、结构紧凑等优点,在生物修饰和化学传感等方面有广阔的应用前景。In order to detect gadolinium nitrate with high sensitivity,a fiber ring cavity laser sensor based on micronano fiber interferometer is studied in this paper.A kind of micronano fiber interferometer with double cone structure is prepared.The strong evanescent field of micronano fiber can interact effectively with the external environment or surrounding medium,and the evanescent field increases with the decreasing of the diameter of fiber biconical structure.The sensitivity of refractive index sensing is also significantly improved.The experimental results show that when the diameter of micronano fiber is 20μm,the refractive index sensitivity of the sensor is 1925 nm/RIU;for the mass concentration of gadolinium nitrate solution,the sensitivity of the sensor is as high as 0.172 nm/(mg·mL^(−1)).In addition,the fiber ring laser sensor has the advantages of high sensitivity and compact structure,and has a broad application prospect in biological modification and chemical sensing.

关 键 词：传感器 光纤环形激光器 微纳光纤 倏逝波 折射率测量 硝酸钆测量 

分 类 号：TN253[电子电信—物理电子学]