Laser-micromachined Fabry-Perot optical fiber tip sensor for high-resolution temperature-independent measurement of refractive index

We propose and demonstrate a Fabry-Perot (F-P) optical fiber tip sensor for high-resolution refractive-index measurement fabricated by using 157-nm laser micromachining, for the first time to our knowledge. The sensor head consists of a short air F-P cavity near the tip of a single-mode fiber and th...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2008-02, Vol.16 (3), p.2252-2263
Main Authors: Ran, Z L, Rao, Y J, Liu, W J, Liao, X, Chiang, K S
Format: Article
Language:English
Subjects:
Equipment Design
Equipment Failure Analysis
Fiber Optic Technology - instrumentation
Lasers
Optical Fibers
Refractometry - instrumentation
Reproducibility of Results
Sensitivity and Specificity
Temperature
Transducers
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We propose and demonstrate a Fabry-Perot (F-P) optical fiber tip sensor for high-resolution refractive-index measurement fabricated by using 157-nm laser micromachining, for the first time to our knowledge. The sensor head consists of a short air F-P cavity near the tip of a single-mode fiber and the fiber tip. The external refractive index is determined according to the maximum fringe contrast of the interference fringes in the reflective spectrum of the sensor. Such a sensor can provide temperature-independent measurement of practically any refractive index larger than that of air and offers a refractive-index resolution of ~4 x 10(-5) in its linear operating range. The experimental data agree well with the theoretical results.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.16.002252