聚合物分散液晶全息光栅红外波段电光调制的特性

研究了聚合物分散液晶全息光栅在1 550 nm红外通信波段的电光调制特性，定性分析了不同驱动电压和不同频率的调制电场在红外波段上对聚合物弥散液晶全息光栅衍射效率和透射效率的影响.通过电介质理论，解释了交变调制电场的频率会改变聚合物弥散液晶全息光栅的介电常数，从而对电光调制的效果产生影响；验证了聚合物弥散液晶全息光栅作为红外光通信掺铒光纤放大器增益均衡器的可行性.

Infrared Electro Optical Property of Holographic Polymer Dispersed Liquid Crystal Grating (Chinese)

Experiments were performed to research the electro-optical characteristics of holo graphic polymer dispersed liquid crystal (HPDLC) at 1550 nm. Results showed that the fre quency and amplitude of the applied field impact the diffraction efficiency and transmission effi ciency of HPDLC greatly. The theory of dielectric matters was used to explain the relationship between the applied field frequency and the dielectric constant and how it influences the effect of electro-optical modulation of the HPDLC. It was proved that the HPDLC devices are potentially useful for Erbium doped fiber amplifiers as a tunable gain equalizer.