Raman lasing and Fano lineshapes in a packaged fiber-coupled whispering-gallerymode microresonator

摘要

We report Raman lasing and the optical analog ofelectromagnetically-induced-transparency (EIT) in a whispering-gallerymode(WGM) microtoroid resonator embedded in a low refractive index polymer matrixtogether with a tapered fiber coupler. The Raman laser supports both single andmultimode operation with low power thresholds. Observations of Fano andEIT-like pheonomena in a packaged microresonator will enable high resolutionsensors and can be used in networks where slow light process is needed. Theseresults open the way for portable, robust, and stable WGM microlasers andlaserbased sensors for applications in various environments.