Optical fiber gas sensor development and application

摘要

This paper reports recent development and application of optical fiber gas sensors using absorption spectroscopy, including open-path gas sensors using fiber coupled micro-optic cells and photonic bandgap (PBG) fibers. A fiber-optic sensor system capable of detecting dissolved fault gases in oil-insulated equipment in power industry is presented. The gases include methane (CH_4), acetylene (C_2H_2) and ethylene (C_2H_4). In addition, the development of gas sensor using PBG fiber will be reported.