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

Author

Wong, Wei Chang ; Chan, Chi Chiu ; Gong, Huaping ; Leong, Kam Chew

Author_Institution

Div. of Bioeng., Nanyang Technol. Univ., Singapore, Singapore

Volume

23

Issue

12

fYear

2011

fDate

6/15/2011 12:00:00 AM

Firstpage

795

Lastpage

797

Abstract

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.

Keywords

Mach-Zehnder interferometers; curvature measurement; fibre optic sensors; optical fabrication; photonic crystals; Mach-Zehnder photonic crystal interferometer; cavity ring-down loop; curvature measurement; curvature sensor; photonic crystal fiber; single-mode fiber; Cavity resonators; Optical fiber sensors; Optical fibers; Optical interferometry; Photonic crystal fibers; Sensitivity; Temperature sensors; Cavity ring-down; curvature; mechanical sensors; optical fiber sensors;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2132796

Filename

5739507