Sensitivity enhancement of D-fiber methane gas sensor using high-index overlay

F. A. Muhammad, G. Stewart, W. Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


The authors determine that the sensitivity of a D-fiber methane gas sensor can be improved by overcoating the flat surface of the fiber with a high index layer. Using the finite difference/perturbation theory technique, the enhancement factor over uncoated D-fiber is computed. The results compare favorably with those obtained from analytical expressions and the matrix method for a planar waveguide structure which models the overcoated D-fiber. From theoretical results it is concluded that the sensitivity can realistically be improved by an order of magnitude over an uncoated fiber.

Original languageEnglish
Pages (from-to)115-118
Number of pages4
JournalPower Engineering Journal
Issue number3
Publication statusPublished - Jun 1993

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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