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光学系统的时间衍射积分及其应用   总被引:3,自引:2,他引:1  
张筑虹  范滇元 《光学学报》1992,12(2):79-182
对含色散光学元件和其它非线性光学元件的光学系统,引入了时间ABCD矩阵元表达的时间衍射积分,用以讨论高斯光脉冲在色散介质中的传输行为,验证了线性色散系统中光传输的时间自成像,光纤中的方波自成形.  相似文献
2.
The spray-dried spheres within a W/Pt multi-separation can be used to prepare discrete core-shell WC@C/Pt catalysts through a typical carburization production mechanism at 800℃. In contrast with previous studies of the WC/Pt synthesis, the reaction observed here proceeds through an indirect annealing mechanism at 600℃ wherein species diffuse, thereby resulting in core-shell structure, and Pt nanoparticles were successfully dispersed in size/shape and randomly scattered across the in situ produced C spheres. Through direct carburization or at higher initial hydrochloroplatinic acid concentrations, however, complete reaction with core-shell spheres was not observed. Indirect carburization reduces the strain felt by the bonds featuring the larger WC particles and allows the motion of carbon around WC and Pt nanoparticles to be reserved, influencing the electrocatalytic performance and stability toward methanol oxidation.  相似文献
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