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1.3 PHYSICAL SCIENCES, Optics
This paper experimentally demonstrates a method for geometrical proﬁling of asymmetries in fabricated thin microﬁber tapers with waist diameters ranging from ∼10 to ∼50µm with submicron accuracy. The method is based on the analysis of whispering gallery mode resonances excited in cylindrical ﬁber resonators as a result of evanescent coupling of light propagating through the ﬁber taper. The submicron accuracy of the proposed method has been veriﬁed by SEM studies. The method can be applied as a quality control tool in fabrication of microﬁber based devices and sensors or for ﬁne-tuning of microﬁber fabrication set-ups.
Kavungal, V., Farrell, G., Wu, Q., Mallik, A. K., Semenova, Y. (2018) Studies of geometrical proﬁling in fabricated tapered optical ﬁbers using whispering gallery modes spectroscopy. Optical Fiber Technology, Vol. 41, March 2018, Pages 82-88. doi.org/10.1016/j.yofte.2018.01.007