Mach-Zehnder Photonic Crystal Interferometer in Cavity Ring-Down Loop for Curvature Measurement

Abstract-An all-fiber Mach-Zehnder interferometer curvature sensor fabricated by collapsing both ends of a photonic crystal fiber connected to a single-mode fiber is described. The interferometer is inscribed into the cavity ring-down loop and shows high sensitivity of 0.7311(μs) -1 · m and high rep...

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Bibliographic Details
Published in:IEEE photonics technology letters 2011-06, Vol.23 (12), p.795-797
Main Authors: Wei Chang Wong, Chi Chiu Chan, Huaping Gong, Kam Chew Leong
Format: Article
Language:English
Subjects:
Cavity resonators
Cavity ring-down
curvature
mechanical sensors
Optical fiber sensors
Optical fibers
Optical interferometry
Photonic crystal fibers
Sensitivity
Temperature sensors
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Summary:Abstract-An all-fiber Mach-Zehnder interferometer curvature sensor fabricated by collapsing both ends of a photonic crystal fiber connected to a single-mode fiber is described. The interferometer is inscribed into the cavity ring-down loop and shows high sensitivity of 0.7311(μs) -1 · m and high repeatability when a curvature of 0.4135 to 0.8122 m -1 is applied. High correlation value of 0.997 is obtained with low standard error of 1.05%. This corresponds to a minimum detectable curvature of 4.849 × 10 -3 m -1 . The proposed sensor also displays low sensitivity to temperature with a value of 0.0008(μs ·° C) -1 .
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2011.2132796