Strain-insensitive and high temperature fiber sensor based on a Mach-Zehnder modal interferometer
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- 作者：Zhigang Cao ; Zhao Zhang ; Xiaochun Ji ; Tao Shui ; Rui Wang ; Chenchen Yin ; Shenglai Zhen ; Liang Lu ; Benli Yu
- 关键词：Fiber sensor ; Modal interferometer ; High temperature ; Strain-insensitive
- 刊名：Optical Fiber Technology
- 出版年：January, 2014
- 年：2014
- 卷：20
- 期：1
- 页码：24-27
- 全文大小：967 K
文摘
In this paper, a strain insensitive high temperature fiber sensor based on the modal interferometer is proposed. It is composed of a piece of small-core photosensitive fiber (SCPSF) which is spliced between two pieces of single mode fiber (SMF). Compared to other high temperature fiber sensor based on the modal interferometer, the sensor owns the highest temperature sensitivity of 106.64 pm/掳C from 200 掳C to 1000 掳C. The temperature to strain cross sensitivity of the sensor is low and only 0.00675 掳C/渭蔚. The reasons for realizing the high temperature sensitivity is also discussed.