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Reduction of chromatic dispersion due to coupling for synchronized-router-based flat-passband filter using

Koichi Maru¹, Yusaku Fujii

¹Department of Electronic Engineering, Gunma University, Kiryu, Gunma, Japan. maru@el.gunma-u.ac.jp

|December 10, 2009

Summary

This study introduces a novel method to reduce chromatic dispersion in flat-passband filters by using phase compensation in arrayed waveguide gratings (AWGs). The technique significantly minimizes dispersion, enhancing filter performance.

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Waveguide Devices

Background:

Chromatic dispersion in optical filters can degrade signal quality.
Arrayed waveguide gratings (AWGs) are key components in optical filtering.
Minimizing dispersion in flat-passband filters is crucial for high-performance optical communication systems.

Purpose of the Study:

To propose and validate an approach for reducing chromatic dispersion in synchronized-router-based flat-passband filters.
To enhance the performance of filters utilizing multiple-input arrayed waveguide gratings (AWGs).

Main Methods:

Phase compensation by correcting waveguide lengths within the AWG.
Utilizing additional dummy waveguides at the input stage.
Simulating filter characteristics using a theoretical model based on Fourier optics and coupled-mode theory.

Main Results:

Significant reduction in chromatic dispersion within the passband was achieved.
The proposed phase compensation method effectively mitigates dispersion effects.
The simulation confirmed the viability of the approach for flat-passband filters.

Conclusions:

The developed method offers an effective solution for chromatic dispersion reduction in AWG-based flat-passband filters.
Phase compensation and dummy waveguides are crucial for improving filter fidelity.
This approach contributes to the advancement of high-performance optical filter design.