激光与光电子学进展, 2021, 58 (9): 0906006, 网络出版: 2021-05-19
基于静电纺丝纳米纤维膜的光纤温湿度传感器 下载: 791次
Optical Fiber Temperature and Humidity Sensor Based on Film Prepared by Electrospinning Nanofibers
光纤光学 光纤传感器 温湿度传感 静电纺丝 聚乙烯醇 羧甲基纤维素 fiber optics optical fiber sensor temperature and humidity sensor electrospinning polyvinyl alcohol carboxymethyl cellulose
摘要
设计一种由锥形无芯光纤级联光纤布拉格光栅组成的温湿度传感器,并在锥区采用静电纺丝的方式制备一层聚乙烯醇/羧甲基纤维素的复合纳米纤维膜。湿度的变化可以改变纳米纤维膜的有效折射率和厚度,从而影响光纤中光的传输损耗,进而使输出光谱功率发生变化,温度的波动会引起光纤光栅中心波长的漂移,通过监测输出光谱波峰功率和中心波长的变化量即可实现温湿度传感。对所设计的传感器进行温湿度响应测试,传感器的相对湿度灵敏度为0.0198 dB/%,相对温度灵敏度为11.730 pm/℃。结果表明静电纺丝法是一种制备光纤传感器表面湿度敏感涂层的有效方法。
Abstract
A temperature and humidity sensor based on cascaded fiber Bragg gratings comprising tapered coreless fibers is designed. A composite nanofiber membrane is prepared for this sensor comprising a layer of polyvinyl alcohol/carboxymethyl cellulose nanofibers, each containing a biconical connector prepared by electrospinning in the cone area. Changes in humidity change the effective refractive index and thickness of the nanofiber film, thereby affecting the transmission loss of light through the fiber, and then changing the output spectral power. In addition, temperature fluctuations cause the center wavelength of the fiber grating to shift. Monitoring the peak power and peak wavelength of the output spectrum (changes in the center wavelength) enables temperature and humidity sensing. Temperature and humidity response tests are performed on the designed sensor. The relative humidity sensitivity of the sensor is 0.0198 dB/%, and the relative temperature sensitivity is 11.730 pm/℃. Results show that electrospinning is an effective method for preparing moisture-sensitive coatings on the surface of optical fiber sensors.
邓理, 张建奇, 孙浩, 李金泽, 马天鸿, 李立彤, 洪登. 基于静电纺丝纳米纤维膜的光纤温湿度传感器[J]. 激光与光电子学进展, 2021, 58(9): 0906006. Li Deng, Jianqi Zhang, Hao Sun, Jinze Li, Tianhong Ma, Litong Li, Deng Hong. Optical Fiber Temperature and Humidity Sensor Based on Film Prepared by Electrospinning Nanofibers[J]. Laser & Optoelectronics Progress, 2021, 58(9): 0906006.