Temperature-Insensitive Microdisplacement Sensor Based on Locally Bent Microfiber Taper Modal Interferometer

Author

Luo, Haimei ; Li, Xinwan ; Zou, Weiwen ; Li, Xing ; Hong, Zehua ; Chen, Jianping

Author_Institution

Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai, China

Volume

4

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

772

Lastpage

778

Abstract

We report a temperature-insensitive microdisplacement sensor with a locally bent microfiber taper interferometer. The microfiber taper waist diameter can be optimized to minimize the spectral shift of the sensor owing to the environmental temperature change. With a ~ 1.92-μm-diameter microfiber taper, a bimodal fiber interferometer is proposed and experimentally fabricated. The transmission spectrum shows substantially small temperature dependence matching well with the theoretical estimation. The transmission spectrum is red-shifted in response to microdisplacement with a high sensitivity of 102 pm/μm but without requirement for temperature compensation.

Keywords

compensation; displacement measurement; fibre optic sensors; light interferometers; red shift; bimodal fiber interferometer; environmental temperature change; locally bent microfiber taper modal interferometer; microfiber taper waist diameter; red shift; size 1.92 mum; temperature compensation; temperature dependence; temperature insensitive microdisplacement sensor; transmission spectrum; Optical fiber sensors; Optical fibers; Optical interferometry; Sensitivity; Temperature measurement; Temperature sensors; Microfiber taper; modal interferometer; optical microdisplacement sensing; temperature-insensitive sensor;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2012.2197606

Filename

6197209