小分子改性的聚合物固体染料激光特性研究

PMMA是常用的固体染料基质，通过添加乙醇进行改性，形成MPMMA，并对其透过率、荧光光谱、激光光谱和斜率效率进行研究.乙醇对染料的宽带荧光谱的影响较小，荧光谱的带宽为～50nm；激光光谱半宽为7—9 nm，激光光谱的峰值波长随乙醇体积比改变而相应的移动；乙醇体积比存在一个最佳值(15%)，使介质在600 nm—750 nm波段具有最好的透过率(～90%)，并且获得最的斜率效率，其值为49.7%. 关键词： 固体染料 改性聚甲基丙烯酸甲酯 宽带激光 PM567

Properties of improved polymer host solid-state dye laser

The solid-state dye laser exhibits attractive features such as free from pollution, compact in structure and low-cost, the development of tunable solid-state dye lasers is an area of active research. PMMA is a popular host for solid-state dyes. When ethanol was added to PMMA, the host can have some improved properties. In the present paper,research results or the transmission spectra, laser spectra, fluorescence spectra and slope efficiency of the polymer dye lasers are presented. When ethanol concentration is 15%, the polymer has the highest transmission rate in 600—750 nm region. Ethanol has a slight impact on the fluorescence spectra. The bandwidth of laser spectra, of whicl the peak positions shift with the ethanol concentration, is about 7—9 nm FWHM. The relation of output energy versus input energy was also studied, and the experimental results confirmed the theoretical results. The highest slope efficiency attained in the experiment was 49.7% with the ethanol concentration of 15%.