摘要
提出了一种由单模布拉格光栅和多模Fabry-Perot腔级联而成的温度和折射率双参量传感器。对多模光纤的末端采用氢氟酸进行腐蚀,在腐蚀后形成的凹陷处填充紫外胶,从而形成Fabry-Perot腔。Fabry-Perot腔和单模光纤布拉格光栅级联后,构成最终的传感结构。Fabry-Perot腔对温度和折射率敏感,而光纤布拉格光栅对温度敏感而对折射率不敏感。利用上述特性,采用灵敏度矩阵法可实现对温度和折射率的同时测量。实验结果表明,传感器的温度和折射率灵敏度分别为-0.4832nm/℃和-508.64pm/RIU。该传感器具有制作工艺简单、结构紧凑、成本低、灵敏度高的优点,有很好的应用前景。
A temperature and refractive index dual-parameter sensor composed of a cascade of a single-mode fiber Bragg grating and a multi-mode Fabry-Perot cavity is proposed.The end of the multi-mode optical fiber is etched with hydrofluoric acid,and then the depression formed after etching is filled with ultraviolet glue to form a Fabry-Perot cavity.The Fabry-Perot cavity and the single-mode fiber Bragg grating are cascaded to form the sensing structure.The Fabry-Perot cavity is sensitive to temperature and refractive index,while the fiber Bragg grating is sensitive to temperature but not to refractive index.Using the above characteristics,the sensitivity matrix method can be used to achieve simultaneous measurement of temperature and refractive index.Experimental results show that the temperature and refractive index sensitivities of the sensor are-0.4832nm/℃and-508.64pm/RIU,respectively.The sensor has the characteristics of a simple manufacturing process,compact structure,low cost,and high sensitivity,and has good application prospects.
作者
姚国珍
宗子天
吴玉章
李炳峰
颜炳欣
尚秋峰
YAO Guozhen;ZONG Zitian;WU Yuzhang;LI Bingfeng;YAN Bingxin;SHANG Qiufeng(Department of Electronic and Communications Engineering;Hebei Key Laboratory of Power Internet of Things Technology;Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology,North China Electric Power University,Baoding 071003,CHN)
出处
《半导体光电》
CAS
北大核心
2024年第3期349-355,共7页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(62205105)
河北省自然科学基金项目(E2019502179)
河北省省级科技计划项目(SZX2020034).
