A silicon-on-insulator (SOI) planar waveguide is designed with a small group velocity dispersion (β ₂) ∼2.212 (ps² m⁻¹) and a quite high nonlinear coefficient (γ) of ∼360.57 (W⁻¹ m⁻¹). The designed waveguide is capable of reshaping a super-Gaussian input optical pulse into a parabolic pulse (PP), without any use of external gain. The same waveguide with a relatively longer length can also generate a triangular pulse (TP) by using a positive chirp at the input. In both cases, PP and TP are created at a much shorter optimum length (L _opt) of a few millimeters when compared to previously reported works on normal dispersion optical fibers. The interaction of a pulse pair inside such an SOI waveguide is investigated, for the first time as per our knowledge to generate a high-frequency (∼4.8 THz) pulse train, while lower repetition rate (∼180 GHz) pulses are used at the input. This study as a whole enables potential device applications in the domains of tunable high frequency (THz) pulse generators, optical signal processing, and many more.

绝缘体上硅 (SOI) 平面波导设计为具有小群速度色散 ( β ₂ ) ~2.212 (ps ² m ^-1 ) 和 ~ 360.57 (W ^-1 m ^- ) 的相当高的非线性系数 ( γ ) ¹ )。设计的波导能够将超高斯输入光脉冲重塑为抛物线脉冲 (PP)，而无需使用任何外部增益。具有相对较长长度的相同波导也可以通过在输入端使用正线性调频来生成三角脉冲 (TP)。在这两种情况下，PP 和 TP 的最佳长度要短得多（L _opt ) 与之前报道的正常色散光纤的工作相比，几毫米。研究了这种 SOI 波导内脉冲对的相互作用，这是第一次根据我们的知识产生高频（~4.8 THz）脉冲序列，同时在低重复率（~180 GHz）脉冲使用输入。这项研究作为一个整体，在可调谐高频 (THz) 脉冲发生器、光信号处理等领域实现了潜在的设备应用。