【摘要】 对基于新型非线性晶体BiB3O6(BIBO)的飞秒光参量变换过程的参量特性进行了研究.计算了BIBO晶体三个光学主平面内的相位匹配条件和有效非线性系数,确定了克尔透镜锁模钛宝石激光器的基频光与倍频光抽运时最佳的光学主平面和相位匹配方式,并分析了三波的时间走离和空间走离,以及信号光的参量增益和带宽.为利用基于BIBO晶体的飞秒光参量技术获得高能量、宽调谐、窄脉宽的光源提供理论依据和实验指导.更多还原

【Abstract】 Parametric properties in femtosecond optical parametric conversion process based on the new nonlinear crystal BiB3O6 (BIBO) are studied. The phase-matching conditions and effective nonlinear coefficients in the three principal optical planes of the BIBO crystal are calculated,optimum principal optical planes and phase-matching types are determined when using the fundamental frequency and the frequency doubling of the KLM Ti:sapphire laser as pump respectively,and temporal walk-off and spatial walk-off of three waves,and signal parametric gain and bandwidth are analyzed. We thereby provided a theoretical basis and experimental guide for obtaining the light source with high energy,wide tuning range,and short duration with femtosecond optical parametric technology based on the BIBO.更多还原