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Continuously tunable optical buffer with a dual silicon waveguide design.

Peter Horak¹, Will Stewart, Wei H Loh

¹Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK. peh@orc.soton.ac.uk

|July 1, 2011

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We designed a silicon waveguide optical buffer that can tune signal delay by over 100%. Adjusting the waveguide spacing allows for a large, continuous change in propagation delay time.

Area of Science:

Photonics and optical engineering
Materials science for integrated optics

Background:

Optical buffers are crucial components in optical communication systems for managing signal timing.
Existing tunable optical delay lines often face limitations in tuning range or complexity.

Purpose of the Study:

To propose and design a novel optical buffer utilizing coupled silicon waveguides.
To demonstrate a large and continuously tunable change in propagation delay time.

Main Methods:

Design of a silicon optical buffer consisting of two coupled waveguides.
Analysis of the relationship between waveguide spacing and propagation delay.

Main Results:

The proposed design achieves a continuously tunable change in propagation delay time.

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The optical delay can be varied by more than 100% by adjusting the spacing between the waveguides.

Conclusions:

The coupled silicon waveguide design offers a promising solution for high-performance optical buffering.
This approach provides a simple yet effective method for achieving significant tunable optical delay.