Periodically poled potassium niobate for second-harmonic generation at 463 nm.
Periodically poled potassium niobate for second-harmonic generation at 463 nm.
复制标题
周期性极化铌酸钾，用于产生 463 nm 的二次谐波。
DOI：
10.1364/ol.24.001154
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发表时间：
1999
期刊：
影响因子：
3.6
通讯作者：
D. Rytz
中科院分区：
文献类型：
--
作者：
J. Meyn;M. Klein;D. Woll;R. Wallenstein;D. Rytz
我们报道了用于二次谐波产生的准相位匹配铌酸钾晶体的制备和表征。采用在电场中进行极化的方法，制备了30 μ m节距的周期性反平行铁电畴。当使用d（31）非线性光学张量元时，所产生的二次谐波的双冷和周期相移都有助于相位匹配。主振荡器功率放大器二极管激光器在5 mm长的晶体中输出倍频，产生463 nm处3.8 mW的二次谐波辐射。实测的有效非线性系数为3.7pm/V。实测的光谱接受带宽为0.25 nm，与理论值相符。
We report on the fabrication and characterization of quasi-phase-matched potassium niobate crystals for second-harmonic generation. Periodic 30-mum -pitch antiparallel ferroelectric domains are fabricated by means of poling in an electrical field. Both birefrigence and periodic phase shift of the generated second harmonic contribute to phase matching when the d(31) nonlinear optical tensor element is used. 3.8 mW of second-harmonic radiation at 463 nm is generated by frequency doubling of the output of master-oscillator power-amplifier diode laser in a 5-mm-long crystal. The measured effective nonlinear coefficient is 3.7pm/V. The measured spectral acceptance bandwidth of 0.25 nm corresponds to the theoretical value.