APPARATUS FOR GAS SENSING BY USING FIBER FABRY-PEROT INTERFEROMETER

摘要

This specification is formed in an optical fiber with respect to the light source Fabry - Perot interference wave due to the principle of interferometry forming a header portion , and further comprising an optical spectrum analyzer for determining the presence of a specific gas on the basis of the wavelength change of the interference wave , wherein the header portion includes a sensing material which expands or contracts by the specific gas , the interference wave , the present invention relates to a gas sensing device and a header portion , characterized in that the wave length is changed according to the expansion or contraction of the sensing material . ;