In this video, we begin with the basics of ridge waveguides, explaining their importance in photonics. We delve into which modes can exist in ridge waveguides, with a focus on silicon photonics. Using Lumerical Mode, we'll demonstrate the workflow for simulating a ridge waveguide, starting with eigenmode analysis. Through this, we will calculate mode propagation, effective index, group index, and dispersion in waveguides. As we proceed, you'll see how this data can be imported into Lumerical Interconnect for further applications. Key modes discussed include quasi-TE00, quasi-TE10, quasi-TM00, and quasi-TM10. We'll deep dive into the shape, parameters, and distinct lobes of these modes to understand their behavior in ridge waveguides.