J4 ›› 2017, Vol. 34 ›› Issue (3): 379-384.

• 波导与纤维光学 • 上一篇    

基于微纳光纤模式干涉仪和石墨烯薄膜的氨气传感器

盛苗苗, 范鹏程,于 波,黄赟赟,李 杰 , 关柏鸥   

  1. 暨南大学光子技术研究院, 广东 广州 510632
  • 收稿日期:2016-12-27 修回日期:2017-03-13 出版日期:2017-05-28 发布日期:2017-05-22
  • 通讯作者: 李 杰(1979- ),河南人,博士,研究员,从事微纳光子器件,光纤传感技术和微结构光纤研究。E-mail: tjieli@jnu.edu.cn
  • 作者简介:盛苗苗(1991- ),浙江人,研究生,从事光纤传感技术和微结构光纤研究。 E-mail:531998256@qq.com
  • 基金资助:
    Supported by National Natural Science Foundation of China(国家自然科学基金,61575083), Natural Science Foundation of Guangdong Province(广东省自然科学基金,2014A0303133)

Ammonia sensor based on microfiber modal interferometer and graphene film

  1. Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
  • Received:2016-12-27 Revised:2017-03-13 Published:2017-05-28 Online:2017-05-22

摘要: 将单锥微纳光纤模式干涉仪和石墨烯相结合,实现了一种高灵敏度的光纤式氨气传感器,其利用石墨烯的特异性吸附效应及微纳光纤结构的高灵敏度传感特性,通过检测干涉光谱的漂移量实现了对氨气浓度微弱变化的检测。对不同组传感器进行了对比分析,结果表明当光纤直径为3.4 μm时最大检测灵敏度为10.8 pm/ppm,与文献中采用其它光纤结构所报道的结果相比几乎提高了一倍。该传感器具有结构简单、易于实现及灵敏度高等优点,在危害气体浓度报警和人体健康检测等领域有潜在的应用前景。

关键词: 纤维与波导光学;氨气传感器;模式干涉仪;石墨烯

Abstract: A fiber ammonia gas sensor with high sensitivity is realized by combining single taper-based microfiber modal interferometer with graphene film. It uses grapheme’s specific absorption property to ammonia and high sensitivity sensing characteristics of microfiber structure, and the detection of weak changes of ammonia concentration is realized by detecting the shift of interference spectrum. Comparison and analysis is carried out among different groups of sensors. Results show that when the fiber diameter is 3.4 μm, the maximum detection sensitivity is 10.8 pm/ppm, which is almost doubled compared to the results of other reported fiber structures. The proposed sensor has the advantages of simple structure, easy implementation and high sensitivity, and it has potential application prospect in the fields of harmful gases concentration alarm and human health detection etc.

Key words: fiber and waveguide optics; ammonia sensor; modal interferometer; graphene