Temperature-insensitive strain sensor with polarization-maintaining photonic crystal fiber based Sagnac interferometer

被引：373
|
作者：
Dong, Xinyong [1 ]
Tam, H. Y.
Shum, P.
机构：
[1] Hong Kong Polytech Univ, Dept Elect Engn, Photon Res Ctr, Hong Kong, Hong Kong, Peoples R China
[2] Nanyang Technol Univ, Network Technol Res Ctr, Singapore 637553, Singapore
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 15期
关键词：
D O I：
10.1063/1.2722058
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A fiber-optic strain sensor is demonstrated by using a short length of polarization-maintaining photonic crystal fiber (PM-PCF) as the sensing element inserted in a Sagnac loop interferometer. Spectrum shift in response of strain with a sensitivity of 0.23 pm/mu epsilon is achieved, and the measurement range, by stretching the PM-PCF only, is up to 32 m epsilon. Due to the ultralow thermal sensitivity of the PM-PCF, the proposed strain sensor is inherently insensitive to temperature, eliminating the requirement for temperature compensation. (c) 2007 American Institute of Physics.
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页数：3
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