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Amplitude modulation and apodization of quasi-phase-matched interactions

机译:准相位匹配相互作用的振幅调制和变迹

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摘要

We propose several techniques to modulate the local amplitude of quasi-phase-matched (QPM) interactions in periodically poled lithium niobate waveguides and demonstrate apodization by using each of these techniques. When the hard edges are removed in the spatial profile of the nonlinear coupling, the sidelobes of the frequency tuning curves are suppressed by 13 dB or more, compared with a uniform grating, consistent with theoretical predictions. The sidelobe-suppressed gratings are useful for frequency conversion devices in optical communication systems to minimize interchannel cross talk, while the amplitude modulation techniques in general have potential uses in applications that require altering the tuning curve shapes.
机译:我们提出了几种技术来调制周期极化的铌酸锂波导中的准相位匹配(QPM)相互作用的局部振幅,并通过使用这些技术来演示切趾。当去除非线性耦合空间轮廓中的硬边缘时,与均匀光栅相比,频率调谐曲线的旁瓣抑制了13 dB或更多,与理论预测一致。旁瓣抑制的光栅可用于光通信系统中的频率转换设备,以最大程度地减少通道间的串扰,而幅度调制技术通常在需要更改调谐曲线形状的应用中具有潜在的用途。

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