Spatiotemporal Nonlinear Pulse Dynamics in Multimode Silicon Nitride Waveguides

2025/08/26 by Azka Maula Iskandar Muda, Muda, Azka Maula Iskandar, Uğur Teğin +1 · 1 voice
Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #physics.optics

paper · pdf · doi:10.48550/arxiv.2508.18945

Abstract

We present an open-source multimode nonlinear Schrödinger equation-based simulation to investigate spatiotemporal nonlinear pulse propagation in thin-film silicon nitride (SiN) waveguides. Using this framework, we analyze femtosecond pulse evolution under diverse excitation conditions in a 6 μm wide SiN waveguide supporting six TE modes. Our results reveal that mode selection and power distribution critically govern nonlinear coupling, soliton fission, and dispersive wave generation, leading to broadband spectra exceeding 3 μm. Our findings reveal that input mode engineering is a powerful strategy for tailoring ultrafast nonlinear dynamics in integrated photonic platforms, with applications in supercontinuum generation, frequency combs, and programmable nonlinear optics.

Citations

• Fiber-based diffractive deep neural network
• Photonic neural networks at the edge of spatiotemporal chaos in multimode fibers
• Programming Nonlinear Propagation for Efficient Optical Learning Machines

Discussions

• Our recent preprint “Spatiotemporal Nonlinear Pulse Dynamics in Multimode Silicon Nitride Waveguides” now on arXiv! Dive into the details here arxiv.org/abs/2508.18945 [bsky, 2 points, 1 comments]

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