论文部分内容阅读
研究了甲基红染料掺杂的液晶混合物E7对波长为 5 32nm的纳秒脉冲激光的光限幅特性 ,观察了激光通过液晶盒后的远场光强分布及其随入射光能量的变化。实验发现 ,对于厚度为 4 6 μm ,重量体积比为 6mg/ 0 5ml的甲基红染料掺杂的液晶混合物E7薄膜 ,其最初三次测试的箝位输出值分别为 0 70 μJ,1.0 0 μJ和 1 5 2 μJ ,输入限幅阈值在 2 3～ 2 8μJ之间。这种薄膜的极低箝位输出特性对用于人眼和传感器保护的光限幅应用很有意义
The optical limiting properties of a methyl red dye-doped liquid crystal mixture E7 for a nanosecond-pulsed laser at a wavelength of 532nm were investigated. The far-field light intensity distribution after laser passing through the liquid crystal cell was observed and its variation with incident light energy. The experimental results show that for the first three times of E7 thin film doped with methyl red dye with a thickness of 46 μm and a weight-to-volume ratio of 6 mg / 0 5 ml, the output values of the clamps are 0 70 μJ and 1.0 0 μJ, respectively 1 5 2 μJ, the input limiting threshold is between 2 3 ~ 2 8μJ. The extremely low clamping output characteristics of this film make sense for optical clipping applications for human eye and sensor protection