光子学报 ›› 2020, Vol. 49 ›› Issue (10): 1006002-1006002.doi: 10.3788/gzxb20204910.1006002

• 光纤光学与光通信 • 上一篇    下一篇

基于同结构级联的马赫曾德光纤传感器对比研究

孙小婷(), 龚华平(), 解铭旸, 林永杰, 赵春柳   

  1. 中国计量大学 光学与电子科技学院,杭州 310018
  • 收稿日期:2020-05-25 接受日期:2020-09-03 出版日期:2020-10-25 发布日期:2020-10-13
  • 作者简介:孙小婷(1995—),女,硕士研究生,主要研究方向为光纤传感.Email: 1343076731@qq.com|龚华平(1977—),男,副教授,博士,主要研究方向为光纤传感和非线性光学.Email: gonghp@163.com
  • 基金资助:
    浙江省自然科学基金(LY17E040002)

Comparative Study on Same Structure Based Cascaded Mach-Zehnder Optical Fiber Sensor

Xiao-ting SUN(), Hua-ping GONG(), Ming-yang XIE, Yong-jie LIN, Chun-liu ZHAO   

  1. Institute of Optoelectronic Technology,China Jiliang University,Hangzhou 310018,China
  • Received:2020-05-25 Accepted:2020-09-03 Online:2020-10-25 Published:2020-10-13
  • Supported by:
    Natural Science Foundation of Zhejiang Province(LY17E040002)

摘要:

为了探究同结构级联传感器的级联级数对传感器灵敏度的影响,对基于同结构二级与三级级联的马赫曾德光纤传感器进行了研究.实验中,分别采用放电熔接法制作了基于腰椎放大结构的和错位结构的二级级联和三级级联的M-Z光纤传感器.并对二级级联结构和三级级联结构的应变传感特性进行了研究.实验结果表明,双腰椎放大的M-Z光纤传感器的应变灵敏度为-0.76 pm/με,三腰椎放大的M-Z光纤传感器的应变灵敏度为-0.75 pm/με,应变灵敏度变化为0.01 pm/με;双错位结构的M-Z光纤传感器的应变灵敏度为-0.73 pm/με,三错位结构的M-Z光纤传感器的应变灵敏度为-0.77 pm/με,应变灵敏度变化为0.04 pm/με,因此,与二级级联结构相比,三级级联结构在灵敏度上并未有明显的提升.该研究表明多级级联的M-Z传感器并不能提高灵敏度.

关键词: 马赫-曾德干涉仪, 腰椎放大, 错位结构, 级联结构, 应变传感

Abstract:

In order to explore the influence of the number of cascade stages of the same structure cascade sensor on the sensitivity of the sensor, a comparative study on the same structure based two-stage and three-stage cascaded Mach-Zehnder(M-Z) optical fiber sensor was carried. In the experiment, we fabricated the two-stage cascaded and three-stage cascaded M-Z sensor based on the waist-enlarged structure and misaligned structure. In order to study the difference between the two-stage cascaded structure and three-stage cascaded structure, the strain performance was also measured. The experimental results show that the strain sensitivity of the two-stage cascaded M-Z sensor with waist-enlarged structure is -0.76 pm/με, and that of the three-stage cascaded M-Z sensor is -0.75 pm/με, the sensitivity change of strain is 0.01 pm/με. The strain sensitivity of the two-stage cascaded M-Z sensor with misaligned structure is -0.73 pm/με, and that of the three-stage cascaded M-Z sensor is -0.77 pm/με, the sensitivity change of strain is 0.04 pm/με. Therefore, the sensitivity of the three-stage cascaded structure is not improved obviously compared with the two-stage cascaded structure. The study shows that the multiple cascaded M-Z structures can not improve the sensitivity.

Key words: Mach-Zehnder interferometer, Waist-enlarged structure, Misaligned structure, Cascaded structure, Strain sensor

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