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A method for generating multi-wavelength light source is theoretically investigated by optical parametric oscillation (OPO) in aperiodic optical superlattice (AOS). The effects of domain errors caused by the room-temperature electric poling process are checked. The relationship between the linewidth and the block length is also discussed. 相似文献
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利用电子束和同步辐射泵浦方法对氢与稀有气体混合物的荧光发射谱已进行了比较广 泛的研究,尤其是HeH~1准分子的绿带光谱早已引起人们的重视并开展了许多理论和实验研究工作。目前人们对稀有气体氢化物准分子的紫外和真空紫外光谱有着浓厚的兴趣,并希望能在紫外和真空紫外光谱区探索到有效的准分子激光体系。 出于上述目的,利用高压脉冲快放电装置激发He/H_2、Ne/H_2A和r/H_2混合物,对它们的荧光发射谱进行了较详细的观察研究。其反应方程式如下: 相似文献
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本文在流动余辉装置上,利用亚稳态惰性气体原子[He(2~3S)、Ne(~3P_(0,2))、Ar(~3P_(0,2))]与SOCl_2的专能反应,在(230-430nm)波段观察到了产物的发射谱,光谱归属为自由基SO(A~3∏_(2,1,0)→X~3∑~-)的跃迁。对光谱强度分析表明:SO(A→X)的偶极跃迁矩Re随核间距明显地变化。通过拟合,找出了这一变化的关系。另外,本文还计算了SO(A~3∏_0→X~3∑~-)跃迁的Franck-Condon因子。 相似文献
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Theoretical study of quasi-phase-matching fourth harmonic generation in periodically poled lithium tantalate 总被引:1,自引:0,他引:1
The direct fourth harmonic generation (FHG) is theoretically demonstrated based on quasi-phase-matching (QPM) configuration in periodically poled lithium tantalate (PPLT). The wavelength dependence of the period of FHG QPM gratings is calculated. Bandwidths of fundamental wavelength, temperature, and incident angle are also studied. A very wide bandwidth, as large as 119.5 nm, of fundamental wavelength near 3699 nm is found with the QPM period of 9.442 μm and the crystal length of 1 cm. 相似文献