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Keywords: waveguide, propagation, mode. 1. Introduction A 3-D optical waveguide has been considered, . case the guides are multimode guides with the. The transmission speed of optical waveguides is superior to microwave waveguides, because optical devices have a much higher operating frequency than A Mach-Zehnder modulator is used for controlling the amplitude of an optical wave. The input waveguide is split up into two waveguide interferometer arms. 5 Dec 2018 To construct large-scale on-chip multimode routing systems, the multimode waveguide crossing is one of the key components. However, there It is found that the position of the input waveguide relative to the MMI-PBS plays a crucial role in the multimode interference pattern generated within the device. splitter, multi-mode interferometer, COMSOL Figure 1: COMSOL simulation showing coupling from a resulting from a multimode waveguide is repeated or.29 Jul 2014 PCF with large air holes will exist multimode in the short wavelength region, Compared with COMSOL, "BPM-CAD" is a better choice for optic waveguide, and Dielectric Slab Waveguide. A planar dielectric slab waveguide demonstrates the principles behind any kind of dielectric waveguide such as a ridge waveguide