论文部分内容阅读
设计制作染料掺杂聚合物分散液晶薄膜激光器件,研究随机激光辐射行为。利用微胶囊法将激光染料、向列相液晶、手性剂、聚乙烯醇混合,制备掺杂两种激光染料的聚合物分散液晶薄膜。利用输出激光532 nm的Nd:YAG倍频脉冲激光器进行泵浦,在582~607 nm波段获得尖锐、离散的随机激光输出,阈值能量约为9 m J,线宽约为0.3~0.4 nm。对于器件产生激光辐射的机制,利用环形腔理论进行了分析。对比掺杂单种激光染料的聚合物分散液晶薄膜激光器件,实验结果显示,同时混合不同类型的激光染料制备的聚合物分散液晶薄膜,能够实现较宽波段的随机激光输出。
Dye-doped polymer dispersed liquid crystal thin film laser devices were designed and fabricated to study the stochastic laser radiation behavior. Using the method of microcapsule, a laser dye, a nematic liquid crystal, a chiral agent and a polyvinyl alcohol are mixed to prepare a polymer dispersed liquid crystal film doped with two laser dyes. Pumped by Nd: YAG pulsed Nd: YAG laser at 532 nm, a sharp and discrete laser output was obtained at 582-607 nm with a threshold energy of about 9 m J and a linewidth of about 0.3-0.4 nm. The mechanism of laser radiation generated by the device is analyzed by the ring cavity theory. Compared with the polymer-dispersed liquid crystal thin film laser device doped with a single laser dye, experimental results show that the polymer dispersed liquid crystal film prepared by mixing different types of laser dyes can achieve random laser output in a wider wavelength band.