CdS_xSe_(1-x)玻璃条型波导光双稳全开关动力学特性的研究

本文采用光纤端面耦合技术,在入射功率为6mW的情况下,观测到掺CdS_xSe_(1-x)半导体微晶玻璃条型波导中上升和下降时间分别为20和30ps的光学双稳跳跃过程,并从实验数据估算出CdS_xSe_(1-x)玻璃的三阶非线性系数x~((3))为1×10~(-9)esu,快速的光学双     

利用激光感应瞬态光栅研究超快弛豫现象

文中采用三能级速率方程和 Maxwell 方程理论导出可调谐激光感应瞬态光栅在第 i 能级上的衍射效率η_i(Δω)与能级寿命τ_i 的关系式,并对衍射线型η_i(Δω)进行讨论和分析。同时报导了我们对孔雀绿(Malachite Green)水溶液的纵向弛豫时间 T_1的实验测量结果。     

波面倾斜脉冲泵浦的高效可见光飞秒光参量产生和放大器

利用脉冲波面倾斜技术补偿三波相互作用的群速度失配，建立了掺钛蓝宝石飞秒再生放大器输出倍频光泵浦共线类匹配ＢＢＯ晶体的光参量产生和放大器，其信号和空闲光输出调谐范围为０．４７～２．７μｍ，脉冲宽度为１００～１７０ｆｓ，重复率为１ｋＨｚ。脉冲最大输出能量为６．５μＪ，总能量转换效率大于１５％。     

InGaAs/GaAs单量子阱的瞬态光荧光特性(英文)

We used the time-resolved equipment consisting of a streak camera and normal photoluminescence set-up to measure the transcient behavior of the PL from the InGaAs/GaAs single quantum well sample, and thus obtained both the temporal resolution and the spectral resolution of the photoluminescence. A rapid decay of PL signal from the GaAs layer and the slow PL decay from the InGaAs well have beed found. From the experimetal results, the trapping efficiency of the carriers by the well is estimated to be about 80%.     

相位共轭皮秒光脉冲的直接观察和记录

利用条纹照相机直接观察和记录了由全息相位共轭技术产生的相位共轭的皮秒光脉冲。实验结果与理论相符合。 关键词：     

TIME DECAY BEHAVIOR OF FULLERENE-C60 STUDIED BY TIME-RESOLVED PHOTOLUMINESCENCE

The time-resoved photoluminescence spectra of C₆₀ have been studied from toluence solution at room temperature and from thin film at both room temperature and 77K. A photoluminescence peak at about 730nm was detected from solution at room temperature and film at 77K, in which lifetimes waz determined to be 1.1 and 0.9ns, respectively. At room temperature, the photoluminescence peak of thin film shifted to 740 nm with fast decay behavior which was fitted well to a double-exponential lifetimes with τ₁ = 0.087ns, τ₂= 0.68 ns. Two relaxation mechanisms are given tentatively in explaining this phenomenon.     

一种新型的产生频谱展宽的方法

在亚毫米液芯波导的一系列实验中,当波导中注入苯和CS_2时,用高功率锁模YAG倍频光脉冲泵浦,可形成总超展宽达约4000cm~(-1)之多的超短脉冲。只向红端展     

用腔内倍频晶体来锁定脉冲Nd:YAG激光器模式的研究

本文对用腔内KTP倍频晶体来锁定脉冲Nd:YAG激光器模式进行了系统的研究,给出了该锁模激光器输出脉宽的具体表达式,实验测量与理论计算进行比较,结果     

毫微秒宽频带光源产生新方法

利用调Q纳秒激光脉冲通过亚毫米液芯波导,可以很方便地获取高功率宽频带纳秒激光脉冲光源。这种光源具有以下几项显著特点:(1)频带足够宽(>2600cm~(-1));(2)功率     

四硼酸锶晶体中新的倍频现象

首次观察到一种新的倍频现象:一个波长为1.06μm,脉宽为500ns的激光脉冲入射到四硼酸锶晶体中,同时产生一个弱的共线倍频脉冲和两个强的非共线倍频脉冲。当基频光入射角从0°变到60°时,均可观察到这种现象。略去弱倍频脉冲的作用,用