Abstract

We report production of air-clad tapered chalcogenide fibers by directly drawing bulk glasses between cleaved tips of tapered silica fibers. Exploiting these tapered fibers with nanoscale waists as evanescent optical couplers, we demonstrate phase-matched coupling of light into on-chip whispering gallery mode chalcogenide microresonators with coupling efficiencies as high as 95%. To the best of our knowledge, this is the first-time demonstration of critical coupling into high-index microresonators by using high-index tapered fibers. The tapered chalcogenide fibers can also be utilized as optical couplers for microresonators made of various high-index materials, as well as for nonlinear optical applications.

© 2017 Optical Society of America

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References

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Supplementary Material (2)

NameDescription
» Visualization 1: AVI (8175 KB)      Attachment of some material on a tapered silica fiber tip.
» Visualization 2: AVI (9904 KB)      A tapered ChG fiber between the tapered silica fiber tip.

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