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Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

Diffraction engineering of multimode waveguides using computer-generated planar holograms.

Shuo-Yen Tseng¹

¹Department of Electro-Optical Engineering, National Cheng Kung University, Tainan, Taiwan. tsengsy@mail.ncku.edu.tw

|December 10, 2009

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Researchers engineered multimode waveguides to reduce self-imaging lengths. Computer-generated holograms adjusted mode coupling, enabling shorter devices on silicon-on-insulator platforms.

Area of Science:

Photonics and Waveguide Engineering
Optical Device Design

Background:

Self-imaging in multimode waveguides is a phenomenon dependent on waveguide dimensions.
Existing designs often require specific lengths for self-imaging to occur.

Purpose of the Study:

To propose a novel scheme for reducing self-imaging lengths in multimode waveguides.
To design devices with enhanced optical properties at a fixed waveguide width.

Main Methods:

Engineering diffraction properties using computer-generated planar holograms.
Adjusting coupling coefficients between guided modes.
Utilizing coupled-mode theory for calculations.
Designing devices on a silicon-on-insulator (SOI) platform.
Verifying analysis with beam propagation simulations.

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Main Results:

Demonstrated a method to significantly reduce self-imaging lengths.
Validated the effectiveness of engineered diffraction properties.
Confirmed the applicability of the silicon-on-insulator platform for such devices.

Conclusions:

The proposed scheme effectively reduces self-imaging lengths by controlling waveguide diffraction.
Computer-generated holograms offer a viable method for mode coupling manipulation.
This work advances the design of compact optical devices based on multimode waveguides.