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17th International Conference on Optical Fibre Sensors
Chemical absorption is investigated using the evanescent fraction of a whispering-gallery mode (WGM). An effective absorption path length of about 50 cm is obtained in methane sensing and about 100 cm in a liquid dye solution.doi:10.1117/12.623687 fatcat:xwicl6ppnfg47dxnvrcdlifsy4