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MgO:LiNbO_3晶体中双波长Nd:YAP激光的和频作用 总被引:3,自引:1,他引:2
基于MgOLiNbO3(MgLN)晶体的Selmeier方程,计算了1079.5nm和1341.4nm激光在该晶体中和频的相位匹配条件和容承角,计算结果用1079.5nm和1341.4nm双波长NdYA-lO3(NdYAP)连续激光在MgOLiNbO3晶体中的和频进行了实验论证,两者相当符合,并得到了连续的598.1nm橙色相干辐射。讨论了1064nm和1318nm双波长NdYAG激光在MgOLiN-bO3晶体中实现双波长和频获得588.7nm橙色相干辐射的可能性。 相似文献
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本文介绍了Ce:Fe:LiNbO_3晶体的生长,测试了晶体的二波耦合指数增益系数和衍射效率,它具有很高的指数增益系数和衍射效率并且具有温度增强效应。 相似文献
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Mg:Fe:LinbO_3晶体光折变增强效应的研究 总被引:2,自引:0,他引:2
在铌酸锂晶体中掺MgO和Fe2O3,生长出Mg:Fe:LiNbO3晶体.由于薄晶片的光爬行效应,晶体的二波耦合指数增益系数高达80cm-1,且角度响应范围加宽,响应速度和抗光散射能力都比Fe:LiNbO3有较大改善.以Mg:Fe:LiNbO3晶体作光放大器,实现了一次迭代全息关联存储. 相似文献
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在等离子激发条件下,进行了SiO_2,和SiON介质薄膜生长实验,研究了沉积参数射频功率、反应压力、反应气体流量比及总流量、反应温度对沉积薄膜的生长速率、均匀性和折射率的影响,并优化了工艺条件,得到了生长速率为150nm/min、均匀性为±0.44%、折射率n为1.463±0.002的SiO_2和生长速率为117nm/min、均匀性为±3.0%、折射率n为1.506±0.004的SiON介质薄膜。还介绍了这两种介质薄膜的应用。 相似文献
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采用激光感生荧光技术测量了Nd:MgO:LiNbO3晶体的偏振荧光光谱,简要地说明了Nd:MgO:LiNbO3双晶体腔内互倍频的基本原理,并在实验中用染料激光作泵浦源实现了其双晶体腔内互倍频运转;得到543nm横模倍频绿光单端输出约YMW,腔前泵浦阈值约38MW,总转换效率约为1.3%。 相似文献
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《Spectrum, IEEE》2008,45(5):20-20
Each of us must contend with office politics, because human beings are political animals, and we form alliances, negotiate deals, demand tribute, and wreak revenge. This paper discusses short list of political do's and don'ts. 相似文献
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In this article, density functional theory (DFT) based on generalized gradient approximation (GGA) and GGA+U, U is Hubbard term, is used to study the electronic properties of CdS doped with different dopants (Cr, Mn). The calculations are carried out for Mn-doped CdS, Cr-doped CdS, and co-doping of Mn/Cr in CdS simultaneously. It is found that hopping of electrons is possible with Cr:CdS and Mn:Cr:CdS while Mn:CdS does not allow the hopping of electrons. Moreover, double exchange interactions are observed in Cr:CdS and d-d super-exchange interactions are observed in Mn:CdS. Now the problem becomes interesting when one magnetic ion (Cr) supporting double exchange interactions and another ion (Mn) supporting d-d super-exchange interactions are doped simultaneously in the same system (CdS). The co-doped CdS is more stable even at high Curie temperature due to p-d double exchange interactions and d-d super exchange interactions. Furthermore, the Cr-3d and Mn-3d states present in-between the band gap are responsible for inner shell transitions and hence for optical properties. Therefore, the co-doped system is taken into account to enhance its applications in the field of spintronic and magneto-optical devices. 相似文献
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《Materials Science in Semiconductor Processing》2001,4(1-3):89-91
A new working mode of scanning capacitance microscopy (SCM) is presented, extending the possibilities of the measurement from lock-in amplitude mapping to recording of capacitance transients arising as response of abrupt bias changes. Effect of Au doping in Si on SCM and scanning capacitance transient spectroscopy (SCTS) was observed. The decay time of capacitance transient, measured locally on slightly doped region shows good agreement with the conventional DLTS results. 相似文献