Agarose coated single mode fiber bend for monitoring humidity

Jinesh Mathew, Yuliya Semenova, Ginu Rajan, Gerald Farrell

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

A relative humidity (RH) sensor measuring wide range of humidity variations based on a bent single mode optical fiber coated with Agarose is reported. When exposed to moisture the change in refractive index of the Agarose layer results in changes in the degree of coupling of the core mode to cladding modes and corresponding changes in the output power are observed in the transmission spectrum of the Agarose coated bent fiber. The sensor shows linear response in the range 25 %- 90 % RH. We show that humidity sensitivity of the sensor is wavelength dependant and high sensitivity is observed at higher wavelengths. The sensor response is fast, stable and reversible in nature.

Original languageEnglish
Title of host publicationOptical Sensors 2011; and Photonic Crystal Fibers V
DOIs
Publication statusPublished - 2011
EventOptical Sensors 2011; and Photonic Crystal Fibers V - Prague, Czech Republic
Duration: 18 Apr 201120 Apr 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8073
ISSN (Print)0277-786X

Conference

ConferenceOptical Sensors 2011; and Photonic Crystal Fibers V
Country/TerritoryCzech Republic
CityPrague
Period18/04/1120/04/11

Keywords

  • Agarose
  • Humidity sensor
  • Macro bend
  • Single mode fiber

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