Lasing Stability Enhancement in Dye Doped Cholesteric Liquid Crystals
Lasing Stability Enhancement in Dye Doped Cholesteric Liquid Crystals
复制标题
染料掺杂胆甾型液晶的激光稳定性增强
DOI：
10.1080/15421400903409218
复制
发表时间：
2010
影响因子：
0.7
通讯作者：
R. Barberi
中科院分区：
文献类型：
--
作者：
M. P. De Santo;M. Matranga;F. Ciuchi;G. Petriashvili;R. Barberi
几年前，实验观察到了染料掺杂的无反射镜液晶混合物的激光，但是尽管迄今为止已经做了所有的努力，无反射镜液晶激光器还不适合于实际应用。仍然需要解决的主要问题涉及激光发射的效率、稳定性和可调谐性。这项工作的目的是获得激光稳定性的改善，从染料掺杂的手性混合物限制在玻璃细胞。稳定性问题主要与从混合物吸收强大的泵浦光束有关，这会导致染色织构的变形和染料的漂白。为了解决这些问题，我们研究了不同的表面涂层和新的系统配置。
Lasing from dye doped cholesteric liquid crystal mixture was experimentally observed several years ago but in despite of all the efforts that have been done so far mirror less liquid crystals lasers are not yet suitable for practical applications. The main issues that have still to be addressed concern the efficiency, the stability and the tunability of the laser emission. This work has been aimed to obtain an improvement in lasing stability from dye doped chiral mixtures confined in glass cells. Stability problems are mainly related to the absorption of the powerful pumping beam from the mixture that leads to a deformation of the cholesteric texture and a bleaching of the dye. To solve these problems we have investigated different surface coatings and new system configurations.