共查询到16条相似文献,搜索用时 62 毫秒
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本文研究了有机材料基于反饱和吸收的瞬态无腔光学双稳特性,以有机材料酞菁铜为例,理论计算得到了基于反饱和吸收的无腔光学双稳回线,实验上首次观察到酞菁铜溶液的增强吸收型无腔光学双稳态,理论计算与实验结果一致。 相似文献
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C60高聚物复合固体材料的反饱和吸收过程研究 总被引:4,自引:2,他引:2
本文报导了新型材料C_(60)α-甲基苯乙烯/苯乙烯共聚物薄板的制作,并利用530nm,10ns激光研究此固体材料的激光透过特性.观测到反饱和吸收过程,即实现了光限制效应. 相似文献
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We present the results of analysis of rate equations for reverse saturable absorption (RSA) process to understand the applicability and probable errors in using only time dependence of the excitation pulse as against both space and time dependence in numerical simulations of rate equations. We have considered a three-level approximation of the five-level rate equations under nano-second laser pulse excitations. The population density, nonlinear absorption and transmission have been calculated and compared for different approximations and for different excitation pulse spatial shapes. We show that the neglect of spatial characteristics of the excitation pulses in the rate equation analysis can lead to considerable errors in the numerical simulations of RSA in case of excitation fluences below the fluence for saturation of transmission. 相似文献
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I.J. Blewett J. Stokes A. Tookey A.K. Kar B.S. Wherrett 《Optics & Laser Technology》1997,29(7):355-358
Traditional z-scan techniques have been used to determine the non-linear optical coefficients of semiconductors. This is usually carried out by scanning a sample along the optical z-axis using a manual or computer-controlled linear translation stage. We report upon a novel z-scan method involving a fastscanning sampleholder: This gives real-time z-scan traces and greatly improves experimental efficiency and applicability. The technique is used here to study the two-photon absorption coefficient of ZnSe. 相似文献