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Experimental observation of mode evolution in single-mode tapered optical fibers

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3 Author(s)
Fielding, A.J. ; Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA ; Edinger, Klaus ; Davis, C.C.

Step-index single-mode optical fibers were tapered and then cleaved by ion beam milling to allow direct examination of the mode evolution in the taper with a microscope objective and CCD camera. Observation of HE1m modes is reported in tapered fibers cleaved at diameters ranging from 8 to 35 μm. Theoretical scalar mode fields are fit to the experimental data and the mode transitions are explained by considering coupled mode theory

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Lightwave Technology, Journal of  (Volume:17 ,  Issue: 9 )