Simple equation to estimate the output power of an evanescent field absorption-based fiber sensor

Saracoglu O., Ozsoy S.

OPTICAL ENGINEERING, vol.41, no.3, pp.598-600, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 3
  • Publication Date: 2002
  • Doi Number: 10.1117/1.1431254
  • Journal Name: OPTICAL ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.598-600
  • Keywords: fiber optic sensors, evanescent field absorption, weakly guiding solution, concentration sensing
  • Erciyes University Affiliated: Yes

Abstract

The behavior of an evanescent field sensor is important for design purposes, This work gives an approximate and simple equation to estimate the absorption of light in an optical fiber with lossy cladding. The formula is based on the weakly guiding approximation and estimates the output power fraction of the sensor in terms of the fiber and the surrounding parameters. The formula is then related to the concentration of the surrounding medium. (C) 2002 Society of Photo-Optical Instrumentation Engineers.