Miniature Single-Mode Fiber Refractive Index Interferometer Sensor Based on High Order Cladding Mode and Core-Offset

Author

Wong, Wei Chang ; Chan, Chi Chiu ; Zhang, Yi Fan ; Leong, Kam Chew

Author_Institution

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

Volume

24

Issue

5

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

359

Lastpage

361

Abstract

A miniature single-mode fiber (SMF) refractive index (RI) interferometer sensor based on high order cladding mode and core offset is presented. The sensor is fabricated by first splicing a very short SMF to another SMF with core-offset to induce cladding mode propagation along the short SMF. The end of the SMF will be melted into a rounded tip to excite the propagating cladding mode into higher order at reflection which creates large phase delay. High RI sensitivity of 1.24 × 10^-4 refractive index unit (RIU) and 8.35 × 10^-5 RIU for RIU of 1.3350 and 1.3845, are obtained, respectively, for the physical length of 690- μm sensor.

Keywords

light interferometers; optical fibre cladding; optical fibre fabrication; refractive index; splicing; core-offset; high order cladding mode; miniature single-mode fiber refractive index interferometer sensor; splicing; wavelength 690 mum; Interference; Optical fiber sensors; Optical fibers; Optical interferometry; Refractive index; Sensitivity; Temperature sensors; Interference; misaligned; optical fiber sensors; refractive index;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2179529

Filename

6104104