【摘要】 利用倍频光与泵浦光脉冲之间的走离效应,通过在周期性极化的LiNbO3波导中间增加两段未被极化的波导,1.55μm波段的泵浦脉冲在极化的波导部分产生0.77μm波段的倍频光,在未被极化的部分不产生倍频光,形成了三个被间隔开来的倍频子脉冲.通过差频将三个倍频子脉冲还原成1.55μm波段的三个差频脉冲,实现了用一个泵浦脉冲产生三个转换脉冲.用数值模拟计算展示脉冲的产生及其演化过程,并讨论了用LiNbO3波导参量控制脉冲特征参量的方法.更多还原

【Abstract】 Using the walk-off effect between pump pulse and harmonic pulse,triple-pulses is produced by second-harmonic generation in periodically-poled lithium-niobate-waveguide in which two pieces of non-poled waveguide is inserted.Three 0.77 μm-band harmonic pulses are generated by 1.55 μm-band pump pulse in poled segments,but they are separated in non-poled segments.Then three harmonic pulses are converted to three 1.55 μm-band converted pulses by difference-frequency generation.The configuration of triple-pulses produced by one pump pulse is implemented,the generation and the waveform-evolution of triple-pulses is exhibited by numerical simulations,and the method of controlling pulse’s characteristic parameter with waveguide size is analyzed as well.更多还原