Helmy A S, Bijlani B, Abolghasem P
Department of Electrical and Computer Engineering and Institute for Optical Sciences, University of Toronto, 10 King's College Road, Toronto, Ontario, Canada.
Opt Lett. 2007 Aug 15;32(16):2399-401. doi: 10.1364/ol.32.002399.
We report what is believed to be the first observation of second-harmonic generation by type I phase matching the bulk chi(xyz)((2))(d(14)) nonlinear coefficient using Bragg reflection waveguides. Second-harmonic power of 0.7 microW was observed for a pump wavelength of 1587.8 nm with an average power of 25.2 mW and a pulse width of approximately 2 ps at a repetition rate of 75.6 MHz. An order of magnitude enhancement between the phase-matched and un-phase-matched second-harmonic conversion efficiency has been observed. Conversion efficiency at the phase-matched wavelengths was 0.001%. The bandwidth of the second harmonic was found to be equal to 0.43 nm, agreeing with the theoretical predictions.
我们报告了据信首次利用布拉格反射波导通过 I 型相位匹配体 χ(xyz)(2)(d14)非线性系数实现二次谐波产生的观测结果。在泵浦波长为 1587.8 nm、平均功率为 25.2 mW、脉冲宽度约为 2 ps、重复频率为 75.6 MHz 的情况下，观测到二次谐波功率为 0.7 μW。已观察到相位匹配和非相位匹配二次谐波转换效率之间有一个数量级的增强。相位匹配波长处的转换效率为 0.001%。发现二次谐波的带宽等于 0.43 nm，与理论预测相符。
