12 research outputs found
Integrating liquid crystal based optical devices in photonic crystal fibers
Liquid crystal photonic bandgap fibers form a versatile and robust platform for designing optical fiber devices, which are highly tunable and exhibit novel optical properties for manipulation of guided light. We present fiber devices for spectral filtering and polarization
control/analysis
Tunable polarisation-maintaining filter based on liquid crystal photonic bandgap fibre
Scolari L, Olausson CB, Weirich J, et al. Tunable polarisation-maintaining filter based on liquid crystal photonic bandgap fibre. Electronics Letters. 2008;44(20): 1189
All-optical modulation in dye-doped nematic liquid crystal photonic bandgap fibers
Photonic crystal fibers (PCFs) have attracted significant attention during the last years and much research has been devoted to develop fiber designs for various applications, hereunder tunable fiber devices. Recently, thermally and electrically tunable PCF devices based on liquid crystals (LCs) have been demonstrated. However, optical tuning of the LC PCF has until now not been demonstrated. Here we demonstrate an all-optical modulator, which utilizes a pulsed 532 nm laser to modulate the spectral position of the bandgaps in a photonic crystal fiber infiltrated with a dye-doped nematic liquid crystal. We demonstrate a modulation frequency of 2kHz for a moderate pump power of 2-3mW and describe two pump pulse regimes in which there is an order of magnitude difference between the decay times