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Tunable Optical Coupling in a Low-Loss Hollow Core Waveguide Using Adiabatically Chirped High-Contrast-Gratings and MEMS Actuators

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Abstract

A low insertion loss optical coupler is designed using chirped high-contrast-grating hollow-core waveguide. 100% tuning of power coupling ratio is realized through mechanically adjusting the waveguide height by ~3 μm.

© 2011 Optical Society of America

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