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首页> 外文会议>Nonlinear Materials, Devices, and Applications >Comparative evaluation of GdCOB and YCOB nonlinear optical properties in principal and out of principal plane configurations for the 1064 nm Nd:YAG laser frequency conversion
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Comparative evaluation of GdCOB and YCOB nonlinear optical properties in principal and out of principal plane configurations for the 1064 nm Nd:YAG laser frequency conversion

机译：比较1064 nm Nd：YAG激光频率转换的GdCOB和YCOB非线性光学特性的主平面和非主平面配置

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Abstract: Large and good optical quality crystal of YCOB and GdCOB were grown from the melt by Czochralski technique. Typically they are 50 mm in diameter and 150 long. We have used the Fresnel formula to calculate GdCOB and YCOB phase matching angle loci for SHG of 1064 nm radiation, in type I and type II configurations. We have used femtosecond broadband pulses to measure the phase matching angels in type I SHG for the three principal planes of YCOB and compared them to the computed values. Different crystals of YCOB and GdCOB were cut and polished in principal plane configurations for type I and type II interactions. Moreover, crystal were also cut by using some SHG configurations selected out of principal planes. All these crystal were used to evaluate in the same conditions, the SHG conversion efficiency of Q-switched Nd:YAG laser in relation with the angular acceptance, walk- off angle and the non-linear coefficients which were also determined. The type II configurations give the highest angular acceptance. The high damage threshold and the relatively large angular acceptance of YCOB and GdCOB led to efficiency greater than 50 percent. !7
机译：摘要：利用切克劳斯基技术从熔体中生长出了大而优质的YCOB和GdCOB晶体。通常，它们的直径为50毫米，长为150。我们已经使用菲涅耳公式来计算I型和II型配置的1064 nm辐射SHG的GdCOB和YCOB相位匹配角基因座。我们已经使用飞秒宽带脉冲来测量YCOB的三个主平面的I SHG类型的相位匹配角度，并将它们与计算值进行了比较。 Y型晶体和GdCOB型晶体在I型和II型相互作用的主平面结构中被切割和抛光。此外，还通过使用从主平面中选择的一些SHG构造来切割晶体。所有这些晶体均用于在相同条件下进行评估，还确定了Q开关Nd：YAG激光器的SHG转换效率与角度接收，偏离角和非线性系数的关系。 II型配置可提供最高的角度接受度。 YCOB和GdCOB的高损伤阈值和相对较大的角度接受度导致效率大于50％。 ！7

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