Sang Xinzhu, Boyraz Ozdal
Department of Electrical Engineering & Computer Science, University of California, Irvine, CA 92697, USA.
Opt Express. 2008 Aug 18;16(17):13122-32. doi: 10.1364/oe.16.013122.
We report a numerical investigation on parametric amplification of high-bit-rate signals and related noise figure inside silicon waveguides in the presence of two-photon absorption (TPA), TPA-induced free-carrier absorption, free-carrier-induced dispersion and linear loss. Different pump parameters are considered to achieve net gain and low noise figure. We show that the net gain can only be achieved in the anomalous dispersion regime at the high-repetition-rate, if short pulses are used. An evaluation of noise properties of parametric amplification in silicon waveguides is presented. By choosing pulsed pump in suitably designed silicon waveguides, parametric amplification can be a chip-scale solution in the high-speed optical communication and optical signal processing systems.
我们报告了一项关于在存在双光子吸收（TPA）、TPA 诱导的自由载流子吸收、自由载流子诱导的色散和线性损耗的情况下，硅波导中高比特率信号的参量放大及相关噪声系数的数值研究。考虑了不同的泵浦参数以实现净增益和低噪声系数。我们表明，如果使用短脉冲，仅在高重复率下的反常色散区域才能实现净增益。本文给出了硅波导中参量放大噪声特性的评估。通过在适当设计的硅波导中选择脉冲泵浦，参量放大可以成为高速光通信和光信号处理系统中的芯片级解决方案。
