Electrically tunable liquid-crystal photonic crystal fiber

Du, Fang; Lu, Yan-Qing; Wu, Shin-Tson
September 2004
Applied Physics Letters;9/20/2004, Vol. 85 Issue 12, p2181
Academic Journal
Tunable light switch using a photonic crystal fiber filled with nematic liquid crystal is demonstrated. The original hand-gap-guiding fiber structure was transformed to a total internal reflection-guiding photonic crystal fiber by tilling liquid crystal into the air core and cladding air holes. By applying external voltage to the liquid-crystal-filled fiber, we have demonstrated an electrically tunable fiber-optical switch with over 30 dB attenuation at 60 Vrms for a Hc-Nc laser beam. This liquid-crystal-filled photonic crystal fiber will find useful applications in fiber-optic communication systems.


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