论文部分内容阅读
从理论和实验两方面分析研究了聚合物分散液晶全息光栅在632. 8nm光波的入射下的衍射谱特性和电压可调特性,实验结果与耦合波理论的计算结果具有很好的一致性,从实验上验证了用耦合波理论来描述聚合物分散液晶全息光栅的衍射特性是恰当的 并且提出了利用聚合物分散液晶全息光栅对掺饵光纤放大器增益谱进行平坦化的方法,利用聚合物分散液晶全息光栅的电压可调特性可实现动态增益均衡 运用该方法,可使掺饵光纤放大器在C波段1530~1560nm内,温度在0℃~65℃范围内变化,掺饵光纤放大器自发辐射谱的不平坦度从3. 3dB降到0. 2dBp-p(峰峰值)
The diffraction spectra and voltage characteristics of the polymer-dispersed liquid crystal holographic gratings at 632.8 nm are investigated theoretically and experimentally. The experimental results are in good agreement with those of the coupled-wave theory. From The experimental results show that it is appropriate to describe the diffraction properties of polymer dispersed liquid crystal holographic gratings by coupling wave theory and a method of planarizing the gain spectrum of an erbium-doped fiber amplifier by using polymer dispersed liquid crystal holographic gratings is proposed. The polymer dispersed liquid crystal The voltage adjustable characteristics of holographic gratings can achieve dynamic gain equalization. This method can be used to change the temperature of the erbium-doped fiber amplifier in the C band of 1530 ~ 1560nm within the range of 0 ℃ ~ 65 ℃. Flatness dropped from 3. 3dB to 0. 2dBp-p (peak-to-peak)