西安电子科技大学学报 ›› 2020, Vol. 47 ›› Issue (3): 92-96.doi: 10.19665/j.issn1001-2400.2020.03.013

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采用多模光纤级联布拉格光栅的温湿度传感器

刘欣,李金泽,孙浩()   

  1. 西安电子科技大学 物理与光电工程学院,陕西 西安 710071
  • 收稿日期:2019-12-30 出版日期:2020-06-20 发布日期:2020-06-19
  • 通讯作者: 孙浩
  • 作者简介:刘欣(1992—),女,西安电子科技大学硕士研究生,E-mail: xinliu_xjtu@163.com
  • 基金资助:
    国家自然科学基金(61705172);陕西省自然科学基础研究计划(2018JQ6054);高等学校学科创新引智计划(B17035)

Temperature and humidity sensor using the multimode fiber cascaded Bragg grating

LIU Xin,LI Jinze,SUN Hao()   

  1. School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China
  • Received:2019-12-30 Online:2020-06-20 Published:2020-06-19
  • Contact: Hao SUN

摘要:

为了设计一种结构简单且能够同时测量温度和相对湿度的光纤传感器,制作了一种采用多模光纤串联布拉格光栅结构的光纤温湿度传感器。首先将6mm的多模光纤与布拉格光栅连接,然后通过氢氟酸将多模光纤的直径腐蚀到60μm,最后在多模光纤上涂覆一层羧甲基纤维素水凝胶膜。对所制作的光纤传感器进行温湿度响应测试。实验结果表明,所设计的传感器湿度灵敏度约为69.6pm/%相对湿度,温度灵敏度约为15pm/℃。该传感器对温湿度响应灵敏,是一种结构简单且紧凑的温湿度同时测量传感器,可被广泛应用。

关键词: 光纤传感器, 相对湿度, 温度, 羧甲基纤维素, 多模光纤, 布拉格光栅

Abstract:

In order to design an optical fiber sensor with a simple structure which can simultaneously measure temperature and relative humidity, we use the multimode fiber cascade Bragg grating to form the basic structure of the sensor. First, a 6mm multimode fiber is connected to a Bragg grating. Then the diameter of the multimode fiber is etched to 40μm by hydrofluoric acid. Finally, a layer of carboxymethyl cellulose hydrogel is coated on the multimode fiber. The temperature and humidity response of the fabricated optical fiber sensor is tested. Experimental results show that the designed sensor has a humidity sensitivity of 69.6pm/% RH and a temperature sensitivity of 15pm/℃. The designed sensor is very sensitive to temperature and humidity, and has a good application prospect.

Key words: optical fiber sensor, relative humidity, temperature, carboxymethyl cellulose, multimode fiber, Bragg grating

中图分类号: 

  • TN253
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