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Published on: December 22, 2015
Tapered holey fibers for spot-size and numerical-aperture conversion
Optics Letters
|December 1, 2007
Abstract:
Adiabatically tapered holey fibers are shown to be potentially useful for guided-wave spot-size and numerical-aperture conversion. Conditions for adiabaticity and design guidelines are provided in terms of the effective-index model. We also present finite-difference time-domain calculations of downtapered holey fiber, showing that large spot-size conversion factors are obtainable with minimal loss by use of short, optimally shaped tapers.

