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14 May 2010 Tunable liquid crystal filled photonic crystal fiber coupler
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In this paper, we proposed a bidirectional coupler implemented in a dual-core photonic crystal fiber (PCF) that has nematic liquid crystal filled holes in the cladding region. Light wave is guided in this PCF by total internal reflection (TIR) due to the refractive index contrast between soft glass and liquid crystal. Its coupling, birefringence and dispersion characteristics are evaluated. The coupler can be used to realize wavelength selective MUX-DEMUX as well as a polarization compensator for wavelength division multiplexing (WDM) application. Moreover the device demonstrates tunability with temperature change.
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Kaisar R. Khan and Trevor J. Hall "Tunable liquid crystal filled photonic crystal fiber coupler", Proc. SPIE 7714, Photonic Crystal Fibers IV, 771411 (14 May 2010);

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