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.
|Number of pages||4|
|Journal||Power Engineering Journal|
|Publication status||Published - Jun 1993|
ASJC Scopus subject areas
- Fuel Technology
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering