Tapered nanoscale chalcogenide fibers directly drawn from bulk glasses as optical couplers for high-index resonators
Date
2017
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Source Title
Applied Optics
Print ISSN
1559-128X
Electronic ISSN
2155-3165
Publisher
OSA - The Optical Society
Volume
56
Issue
3
Pages
385 - 390
Language
English
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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.
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Keywords
Chalcogenides , Fibers , Glass , Nanotechnology , Optical fibers , Phase matching , Resonators , Whispering gallery modes , Chalcogenide fibers , Coupling efficiency , Critical coupling , Directly drawing , High index materials , Micro resonators , Nonlinear optical applications , Phase-matched coupling , Nonlinear optics