Cladding-Mode Resonance in Polarization-Maintaining Photonic-Crystal-Fiber-Based Sagnac Interferometer and Its Application for Fiber Sensor

Author

Dong, Bo ; Hao, Jianzhong ; Liaw, Chin-Yi ; Xu, Zhaowen

Author_Institution

RF & Opt. Dept., Inst. for Infocomm Res., Singapore, Singapore

Volume

29

Issue

12

fYear

2011

fDate

6/15/2011 12:00:00 AM

Firstpage

1759

Lastpage

1763

Abstract

A novel cladding-mode-resonance-based polarization-maintaining photonic-crystal-fiber Sagnac interferometer (PMPCF-SI) and its application for fiber sensor are demonstrated. By introducing a mode field diameter mismatch at a splicing joint of an inbuilt single-mode fiber (SMF)-PMPCF-SMF structure connected in an SI, an intermodal interference is constructed by the excited cladding modes and the polarization modes of the PMPCF. With such a PMPCF-SI, simultaneous strain and temperature measurements are demonstrated. The SI behaves as a sensor and a filter simultaneously. By measuring the wavelength variation and transmissivity difference between two almost symmetrical resonance peaks in the spectral response of the SI, simultaneous strain and temperature measurements are achieved.

Keywords

Sagnac interferometers; fibre optic sensors; holey fibres; optical fibre cladding; optical fibre polarisation; strain measurement; temperature measurement; Sagnac interferometer; cladding mode resonance; fiber sensor; inbuilt single mode fiber; intermodal interference; mode field diameter mismatch; polarization maintaining photonic crystal fiber; polarization mode; splicing joint; strain measurement; temperature measurement; transmissivity difference; wavelength variation; Interference; Optical fiber sensors; Silicon; Strain; Strain measurement; Temperature measurement; Temperature sensors; Cladding-mode-resonance; polarization-maintaining photonic-crystal-fiber-based Sagnac interferometer (PMPCF-SI); strain; temperature;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2011.2140313

Filename

5744083