Avoided-crossing-based liquid-crystal photonic-bandgap notch filter |
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Authors: | Noordegraaf Danny Scolari Lara Laegsgaard Jesper Tanggaard Alkeskjold Thomas Tartarini Giovanni Borelli Elena Bassi Paolo Li Jun Wu Shin-Tson |
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Institution: | COM-DTU Department of Communications, Optics and Materials, Technical University of Denmark, DK-2800, Denmark. dno@com.dtu.dk |
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Abstract: | We demonstrate a highly tunable deep notch filter realized in a liquid-crystal photonic-bandgap (LCPBG) fiber. The filter is realized without inducing a long-period grating in the fiber but simply by filling a solid-core photonic-crystal fiber with a liquid crystal and exploiting avoided crossings within the bandgap of the LCPBG fiber. The filter is demonstrated experimentally and investigated using numerical simulations. A high degree of tuning of the spectral position of the deep notch is also demonstrated. |
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