Inline Microcavity-Based PCF Interferometer for Refractive Index and Temperature Sensing

Author

Dash, Jitendra Narayan ; Jha, Rajan

Author_Institution

Nanophotonics & Plasmonics Lab., IIT Bhubaneswar, Bhubaneswar, India

Volume

27

Issue

12

fYear

2015

fDate

June15, 15 2015

Firstpage

1325

Lastpage

1328

Abstract

We report an inline Fabry-Perot interferometer based on photonic crystal fiber (PCF) with microcavity as refractive index and temperature sensor. The interferometer consists of a section of large mode area PCF spliced with single mode fibers on one side, whereas a microcavity is fabricated on the other side of PCF. The formation of the microcavity reduces the period of the interference pattern thereby providing distinctiveness to the measurement. Experimental results show that this simple, compact, and highly stable inline interferometer has temperature sensitivity of 12 pm/°C and a refractive index sensitivity of ~30 nm/RIU along with a resolution of 3 × 10^-4 RIU^-1.

Keywords

Fabry-Perot interferometers; fibre optic sensors; holey fibres; micro-optomechanical devices; microcavities; microfabrication; microsensors; optical fibre fabrication; photonic crystals; refractive index measurement; temperature sensors; inline Fabry-Perot interferometer; inline microcavity-based PCF interferometer; interference pattern; large mode area PCF spliced; photonic crystal fiber; refractive index sensing; refractive index sensitivity; single mode fibers; temperature sensing; temperature sensitivity; Cavity resonators; Interference; Microcavities; Optical fiber sensors; Optical fibers; Optical interferometry; Temperature sensors; Fabry Perot interferometer; Microcavity; PCF; microcavity;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2421308

Filename

7089200