Lin Qiang, Zhang Jidong, Fauchet Philippe M, Agrawal Govind P
Opt Express. 2006 May 29;14(11):4786-99. doi: 10.1364/oe.14.004786.
We show that ultrabroadband parametric generation and wavelength conversion can be realized in silicon waveguides in the wavelength region near 1550 nm by tailoring their zero-dispersion wavelength and launching pump wave close to this wavelength. We quantify the impact of two-photon absorption, free-carrier generation, and linear losses on the process of parametric generation and show that it is difficult to realize a net signal gain and transparent wavelength conversion with a continuous-wave pump. By investigating the transient dynamics of the four-wave mixing process initiated with a pulsed pump, we show that the instantaneous nature of electronic response enables highly efficient parametric amplification and wavelength conversion for pump pulses as wide as 1 ns. We also discuss the dual-pump configuration and show that its use permits multiband operation with uniform efficiency over a broad spectral region extending over 300 nm.
我们表明，通过调整硅波导的零色散波长并在接近该波长处发射泵浦波，可在1550 nm附近的波长区域内的硅波导中实现超宽带参量产生和波长转换。我们量化了双光子吸收、自由载流子产生和线性损耗对参量产生过程的影响，并表明使用连续波泵浦难以实现净信号增益和透明波长转换。通过研究由脉冲泵浦引发的四波混频过程的瞬态动力学，我们表明电子响应的瞬时特性能够实现对宽达1 ns的泵浦脉冲进行高效参量放大和波长转换。我们还讨论了双泵浦配置，并表明其使用允许在超过300 nm的宽光谱区域内以均匀效率进行多波段操作。
