[摘要]：This work demonstrates photo alignment and electrical tuning effects in photonic liquid crystal fiber (PLCF). Applying voltages of 0 similar to 130V and 250 similar to 400V shifts the short and long wavelength edges of the transmission bands by about 45nm and 74nm toward longer wavelengths, respectively. An electro-tunble notch filter is formed in the PLCF without the use of gratings. The range of tunability of the notch filter is around 180nm with an applied voltage of 140 similar to 240V. This photo-induced alignment yields a permanently tilted LC structure in PCF, which reduces the threshold voltage, and can be further modulated by electric fields. The polarization dependent loss and fast response time of photo-aligned PLCF is also demonstrated. The finite-difference frequency-domain method is adopted to analyze the shift of the transmission bandgap, and the simulation results are found to correlate well with experimental data. (C) 2010 Optical Society of America
