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Updated: Jul 4, 2026

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Optical cross-connect circuit using hitless wavelength selective switch.

Yuta Goebuchi¹, Masahiko Hisada, Tomoyuki Kato

¹Department of Electrical and Computer Engineering, Graduate School of Engineering, Yokohama National University, Yokohama 240-8501, Japan.

|June 11, 2008

Summary

This summary is machine-generated.

Researchers developed optical switching circuits using hitless wavelength selective switches (WSS) and microring resonators. This technology enables efficient wavelength channel switching without blocking, achieving high performance for optical networks.

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Area of Science:

Photonics
Optical Communications
Integrated Optics

Background:

Optical cross-connect circuits are essential for modern telecommunication networks.
Existing wavelength selective switches (WSS) face limitations in switching speed and blocking during channel tuning.

Purpose of the Study:

To propose and demonstrate the fundamental components of a full matrix optical switching circuit.
To utilize hitless wavelength selective switches (WSS) for advanced optical switching functionalities.

Main Methods:

Development of cascaded hitless WSS and multi-port switches.
Realization of switching elements via individual Thermo-Optic (TO) tuning of series-coupled microring resonators.
Demonstration of a four-wavelength switch using double series-coupled microring resonators and a three-wavelength switch using quadruple series-coupled microring resonators.

Main Results:

Achieved arbitrary wavelength channel switching without blocking other channels during tuning.
Demonstrated high extinction ratios (39.0-46.6 dB) and low switching crosstalk (19.3-24.5 dB) with quadruple series-coupled microring resonators.
Validated the effectiveness of the proposed hitless WSS for optical cross-connect applications.

Conclusions:

The proposed hitless WSS based on microring resonators provides a viable solution for high-performance optical switching.
The demonstrated switching elements are scalable and suitable for building complex optical cross-connect circuits.
This technology advances the development of efficient and non-blocking optical networks.