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Effects of cladding modification on the sensing potential of intrinsic polymer optical fiber as a VOCs sensor

F. ABDURRAHMAN1, N. ARSAD1,2,* , S. SHAARI2, A. ASHRIF A. BAKAR1, P. SUSTHITHA MENON2

Affiliation

  1. Department of Electrical, Electronic and System Engineering, The National University of Malaysia, Selangor, Malaysia
  2. Photonics Laboratory, Institute of Microengineering and Nanoelectronics, The National University of Malaysia, Selangor, Malaysia

Abstract

The effects of cladding modification on polymer optical fiber (POF) are investigated theoretically and experimentally as a preliminary step in developing a fiber optic intrinsic sensor. Etching technique critically affects the geometrical result of the fiber during the initial stage of fabricating the intrinsic fiber probe. In order to create intrinsic fiber sensor, the cladding must be entirely removed as to generate thorough evanescent wave dispersion into the sensing target. In this research we demonstrate the investigation on two cladding modification methods; chemical etching and mechanical etching. Fiber optics with different etched cladding’s length and diameter are fabricated and later tested on volatile organic compound inside the testing chamber. The modified sensor probe exhibits good response and is able to effectively detect the presence of methanol vapor ranging from 95% to 20% in the chamber..

Keywords

Fiber intrinsic sensor, Chemical etching, Evanescent, Sensor probe.

Submitted at: Jan. 29, 2015
Accepted at: May 7, 2015

Citation

F. ABDURRAHMAN, N. ARSAD, S. SHAARI, A. ASHRIF A. BAKAR, P. SUSTHITHA MENON, Effects of cladding modification on the sensing potential of intrinsic polymer optical fiber as a VOCs sensor, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 901-906 (2015)