Photonic Crystal Fiber-Based Modal Interferometer for Refractive Index Sensing

Author

Ming Deng ; Xiaokang Sun ; Huifeng Wei ; Jiang Li

Author_Institution

Key Lab. of Optoelectron. Technol. & Syst., Chongqing Univ., Chongqing, China

Volume

26

Issue

6

fYear

2014

fDate

15-Mar-14

Firstpage

531

Lastpage

534

Abstract

A core-cladding-mode interferometer is fabricated by splicing a single-mode fiber to an endlessly single-mode photonic crystal fiber (ESM-PCF). The optimum collapsed length of ESM-PCF is investigated to ensure a higher order cladding mode of ESM-PCF to be excited, serving as a sensing beam. At the end of ESM-PCF, a spherical end-facet with big radius is proposed to ensure from where the higher order cladding mode is to be reflected and then it interferes with the core mode serving as a reference beam. Such a device has an enhanced refractive index sensitivity of ~ 199 nm/RIU, offering potentials in biological and chemical applications.

Keywords

fibre optic sensors; holey fibres; light interferometers; photonic crystals; refractive index measurement; splicing; cladding mode; core-cladding-mode interferometer; optimum collapsed length; refractive index sensing; sensing beam; single-mode fiber splicing; single-mode photonic crystal fiber; spherical end-facet; Interference; Optical fiber sensors; Optical fibers; Photonic crystal fibers; Refractive index; Splicing; Temperature sensors; Core-cladding-mode interferometer; photonic crystal fiber; refractive index;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2293601

Filename

6678182