基于在双芯光纤中创建的马赫-曾德尔干涉仪的超灵敏折射率传感器。

Ultrasensitive refractive index sensor based on a Mach-Zehnder interferometer created in twin-core fiber.

作者信息

Li Zhengyong, Liao Changrui, Wang Yiping, Dong Xiaopeng, Liu Shen, Yang Kaiming, Wang Qiao, Zhou Jiangtao

出版信息

Opt Lett. 2014 Sep 1;39(17):4982-5. doi: 10.1364/OL.39.004982.

DOI:10.1364/OL.39.004982

Abstract

We proposed and experimentally demonstrated a twin-core fiber (TCF)-based Mach-Zehnder interferometer (MZI) to develop an ultrasensitive refractive index (RI) sensor. This fiber MZI was constructed by splicing a short section of TCF between two sections of single mode fibers. A microchannel was drilled through one core of the TCF by means of femtosecond laser micromachining to create one arm of the proposed interferometer, and the other core worked as the second arm. Such a fiber interferometer exhibits an ultrahigh RI sensitivity of -10981 nm/RIU and a low temperature cross-sensitivity of 3.96×10(-6) RIU/°C. Moreover, the ultra-compact device size and all-fiber configuration make it very suitable for highly sensitive RI sensing at precise location.

摘要

我们提出并通过实验证明了一种基于双芯光纤（TCF）的马赫-曾德尔干涉仪（MZI），以开发一种超灵敏折射率（RI）传感器。这种光纤MZI是通过在两段单模光纤之间拼接一小段TCF构建而成的。利用飞秒激光微加工技术在TCF的一个纤芯上钻出一个微通道，以形成所提出干涉仪的一个臂，另一个纤芯则作为第二个臂。这种光纤干涉仪具有-10981 nm/RIU的超高RI灵敏度和3.96×10(-6) RIU/°C的低温交叉灵敏度。此外，超紧凑的器件尺寸和全光纤配置使其非常适合在精确位置进行高灵敏度RI传感。