Tapered fiber reinforcement for stable coupling with WGM microresonator

A method of the tapered fiber reinforcement for the stable coupling with whispering gallery mode (WGM) microresonator is developed. It is revealed that the slight curvature of tapered fiber results in its stronger fixation and prevents the sticking of the fiber and microresonator. An excitation of WGMs by reinforced curved tapered fiber with curvature radius about 15 mm is demonstrated experimentally.