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Travelling-wave resonant four-wave mixing breaks the limits of cavity-enhanced all-optical wavelength conversion

机译:行波谐振四波混合打破了腔增强全光波长转换的限制

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摘要

Wave mixing inside optical resonators, while experiencing a large enhancement of the nonlinear interaction efficiency, suffers from strong bandwidth constraints, preventing its practical exploitation for processing broad-band signals. Here we show that such limits are overcome by the new concept of travelling-wave resonant four-wave mixing (FWM). This approach combines the efficiency enhancement provided by resonant propagation with a wide-band conversion process. Compared with conventional FWM in bare waveguides, it exhibits higher robustness against chromatic dispersion and propagation loss, while preserving transparency to modulation formats. Travelling-wave resonant FWM has been demonstrated in silicon-coupled ring resonators and was exploited to realize a 630-μm-long wavelength converter operating over a wavelength range wider than 60 nm and with 28-dB gain with respect to a bare waveguide of the same physical length. Full compatibility of the travelling-wave resonant FWM with optical signal processing applications has been demonstrated through signal retiming and reshaping at 10 Gb s−1
机译:光谐振器内部的波混合虽然大大提高了非线性相互作用的效率,但受到带宽限制,从而阻碍了其在处理宽带信号中的实际应用。在这里,我们证明了行波共振四波混合(FWM)的新概念克服了这些限制。这种方法将共振传播提供的效率增强与宽带转换过程结合在一起。与裸露波导中的传统FWM相比,它在抵抗色散和传播损耗方面表现出更高的鲁棒性,同时又保持了调制格式的透明性。行波谐振FWM已在硅耦合环形谐振器中得到证明,并被用于实现一个630μm长的波长转换器,该转换器在超过60 nm的波长范围内工作,相对于裸波导的增益为28 dB。相同的物理长度。通过在10 Gb s -1 处进行信号重定时和重塑,证明了行波谐振FWM与光信号处理应用程序完全兼容。

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