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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Published on: April 4, 2017

Compact grating couplers on silicon-on-insulator with reduced backreflection.

Yanlu Li¹, Diedrik Vermeulen, Yannick De Koninck

¹Photonics Research Group, INTEC-department, Ghent University-IMEC, Ghent, Belgium. Yanlu.Li@intec.ugent.be

|November 2, 2012

Summary

We developed a compact grating coupler that significantly reduces backreflection in silicon-on-insulator (SOI) devices. This improved design minimizes unwanted light reflection without impacting signal transmission.

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Nanophotonics

Background:

Backreflection in grating couplers on silicon-on-insulator (SOI) platforms is a significant challenge for many photonic applications.
Minimizing backreflection is crucial for enhancing the performance and reliability of integrated optical devices.

Purpose of the Study:

To design and demonstrate a compact grating coupler with dramatically reduced backreflection.
To investigate the effectiveness of a novel design that redirects reflected light away from the input waveguide.

Main Methods:

Development of a compact grating coupler design.
Fabrication of the proposed grating coupler on a silicon-on-insulator (SOI) platform.
Experimental characterization of backreflection and transmission performance.

Main Results:

The improved grating coupler design achieved a significant reduction in backreflection, down to -50 dB.
The reduction in backreflection was accomplished without any apparent penalty in optical transmission.
The realized devices confirmed the effectiveness of directing reflected light away from the input waveguide.

Conclusions:

The novel compact grating coupler design effectively suppresses backreflection in SOI photonic integrated circuits.
This advancement offers a promising solution for improving the performance of optical systems relying on grating couplers.
The demonstrated -50 dB backreflection reduction opens new possibilities for high-performance photonic device integration.