超短脉冲染料放大器中的参数研究

对超短脉冲染料放大器(DLA)中放大的自发辐射(ASE)随泵浦强度变化的关系进行了实验研究,为了求得具有高储能、低自发辐射背景噪声的染料激光放大器的泵浦强度,我们用速率方程对实验结果进行了解析分析,获得了染料激光放大器的泵浦强度与染料参数(浓度、增益长度等)的近似关系式,以及相应条件下染料激光放大器储能和小信号增益的表达式,并与实验进行了比较.二者符合较好,从而为染料激光放大器的设计提供了参考.

Investigation of parameters in a ultrashort pulse dye laser amplifier

The dependene of amplified spontaneous emission (ASE) flux on pumping rate in a dye laser amplifier (DLA) was investigated experimentally. The experimental result is analysed theoretically, and a approximated expression for the pumping rate as a function of the dye parameter (dye concentration, active length, etc.) is obtained for enabling the DLA gain energy as hjgh as possible while keeping low ASE noise. The formulas of Stored energy and small signal gain of DLA in the pumping condition are also deduced. The theoretical calculation is in good agreement with the experimental result, and can be used for design of the ultrashort pulse dye laser amplifier.