Temperature Compensated Strain Sensor Based on Cascaded Sagnac Interferometers and All-Solid Birefringent Hybrid Photonic Crystal Fibers

Author

Gu, Bobo ; Yuan, Wu ; He, Sailing ; Bang, Ole

Author_Institution

Dept. of Photonics Eng., Tech. Univ. of Denmark, Lyngby, Denmark

Volume

12

Issue

6

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

1641

Lastpage

1646

Abstract

We demonstrate a temperature compensated strain sensor with two cascaded Sagnac interferometers, that provide strain sensing and temperature compensation, respectively. The Sagnac interferometers use an all-solid hybrid photonic crystal fiber with stress-induced birefringence. The stress-induced birefringent fiber is known to offer the maximum strain sensitivity, but also to suffer from temperature crosstalk. Our experimental results show that the cascaded Sagnac sensor can suppress the crosstalk to a temperature upto 0.33 με/°C, while still providing a high strain sensitivity of ~ 25.6 pm/με.

Keywords

Sagnac interferometers; birefringence; compensation; fibre optic sensors; holey fibres; photonic crystals; strain sensors; all solid birefringent hybrid photonic crystal fibers; cascaded Sagnac interferometer; cascaded Sagnac sensor; strain sensitivity; stress induced birefringence; temperature compensated strain sensor; Optical fiber sensors; Optical fibers; Sagnac interferometers; Sensitivity; Strain; Temperature sensors; Cascaded Sagnac interferometers; hybrid photonic crystal fiber; temperature compensation;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2011.2175725

Filename

6074919