ANALYSIS OF MZI MODULATORS WITH ONE-DIMENSIONAL PHOTONIC CRYSTAL WAVEGUIDES

Date

2023-6-23

Author

Yılmaz, Fatih Utku

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Photonic Crystals, also known as PhCs, can control light in unique ways, which is why they are getting more and more attention in the world of integrated optics. This thesis looks into how one-dimensional PhCs can make Mach-Zehnder Interferometer modulators operate with higher performance, offering a new choice besides the usual silicon-based options. The research focuses on how flexible PhCs are, meaning they can be tweaked to work best around a 1550 nm centered bandwidth. This special feature, along with certain measurements of width, radius, and height, are the basis of a PhC design that aims to boost the modulator's performance. The study starts with a thorough look into how bandwidth changes with different device lengths. Then, a new MZI modulator design is suggested, which differs from the norm by using one-dimensional PhC waveguides as interferometer's arms. This setup makes the most of the PhCs' unique abilities to support high-bandwidth operations while making the modulator a lot smaller overall. By going deep into the analysis and using numerical evaluations of the PhC's band diagram, it is proven that this design's functionality can be supported by more than one concept. The findings show a big jump in bandwidth and efficient working, along with a notable shrink in device size, making it clear that this is a big step up from traditional silicon-based designs.

Subject Keywords

Photonic Crystals, Mach-Zehnder Interferometer, Mach-Zehnder Inter- ferometer Enhancement, Photonic Crystal Waveguide

URI

https://hdl.handle.net/11511/104501

Collections

Graduate School of Natural and Applied Sciences, Thesis