期刊
JOURNAL OF OPTICS
卷 18, 期 10, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/18/10/105002
关键词
optical fiber sensor; tapered fiber; strain; PCF; up-taper; curvature
类别
资金
- Research Center Imarat, India
We propose a Mach-Zehnder interferometric sensor based on tapered Photonic Crystal Fiber (PCF) with up-tapered collapsed region for measurement of parameters such as curvature, strain and temperature. The up-tapered collapsed region helps in excitation of the cladding modes in PCF and these modes interfere with each other at the tapered region of PCF which is completely collapsed. Three tapered PCFs with varying geometry are fabricated and their effect on curvature sensitivity is analyzed. Experimental results show that the proposed sensor has a curvature sensitivity of 7.56 nm m(-1) with negligible hysteresis effect. Moreover, the proposed sensor shows a strain sensitivity of 1.6 pm/mu epsilon along with a maximum temperature sensitivity of 51.6 pm degrees C-1. In addition to this, the response of the interference pattern to all these parameters is found to be linear.
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