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Add-drop filter based on TiO₂ coated shifted Bragg grating.

Somnath Paul, Ismo Vartiainen, Matthieu Roussey

|November 19, 2016

Summary

This summary is machine-generated.

We developed a novel titanium dioxide coated shifted Bragg grating on silicon-on-insulator for optical add-drop multiplexing. This device achieves a 2.2 nm reflection bandwidth and 14 dB extinction ratio, demonstrating spectral tunability.

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Area of Science:

Photonics
Materials Science
Optical Engineering

Background:

Integrated photonics platforms are crucial for advanced optical communication systems.
Shifted Bragg gratings offer unique optical filtering capabilities.
Titanium dioxide coatings can modify optical properties and enable tunability.

Purpose of the Study:

To design and demonstrate an optical add-drop multiplexer using a titanium dioxide coated shifted Bragg grating.
To investigate the impact of titanium dioxide coating on device performance.
To explore the spectral tunability of the device via re-coating.

Main Methods:

Fabrication of a shifted Bragg grating on a silicon-on-insulator platform.
Integration of a titanium dioxide coating using atomic layer deposition.
Experimental characterization of optical add-drop functionality, reflection bandwidth, and extinction ratio.
Evaluation of spectral tunability through re-coating.

Main Results:

Achieved a reflection bandwidth of 2.2 nm and an extinction ratio of 14 dB.
Demonstrated optical add-drop functionality based on mode conversion and splitting.
Verified spectral tunability with a measured response of 0.8 nm per 1 nm of titanium dioxide re-coating.

Conclusions:

The titanium dioxide coated shifted Bragg grating enables efficient optical add-drop functionality.
The coating enhances device performance and provides spectral tunability.
This technology holds promise for reconfigurable optical networks.