Plastic Optical Fiber Refractive Index Sensor Employing an In-Line Submillimeter Hole

Author

Jong-Dug Shin ; Jaehee Park

Author_Institution

Sch. of Electron. Eng., Soongsil Univ., Seoul, South Korea

Volume

25

Issue

19

fYear

2013

fDate

Oct.1, 2013

Firstpage

1882

Lastpage

1884

Abstract

An in-line submillimeter hole fabricated by micro-drilling plastic optical fiber (POF) directly has been proposed as a compact refractive index sensor. Since the hole behaves as a concave lens if it is filled with a liquid having lower refractive index than that of the fiber core, transmittance increases in proportion to the refractive index. Analysis of the sensor transmittance has been performed using a simple ray optics model. Through immersing a 1.5-mm POF with a 0.35-mm-radius hole into various liquids, transmittance of the sensor has been measured at 670 nm. It has been shown that the experimental and analytical results are in excellent agreement.

Keywords

fibre optic sensors; lenses; refractive index; concave lens; fiber core; in-line submillimeter hole; microdrilling plastic optical fiber; plastic optical fiber refractive index sensor; sensor transmittance; simple ray optics model; size 0.35 mm; size 1.5 mm; Indexes; Liquids; Optical fiber sensors; Optical fiber theory; Plastic optical fiber; Refractive index; Fiber optic sensors; microstructure fabrication; plastic optical fiber; refractive index sensors;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2278973

Filename

6583239