Intracavity chemical absorption sensing using microresonator whispering-gallery modes

G. Farca, S. I. Shopova, A. T. Rosenberger
2005 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