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All-optical switching in a distributed-feedback GaInAsP waveguide.

K Nakatsuhara¹, T Mizumoto, E Takahashi

¹Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 152-8552, Japan. knakatsu@o.cc.titech.ac.jp

|March 6, 2008

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Researchers demonstrated all-optical switching using a novel GaInAsP/InP waveguide device with a distributed-feedback structure. This technology enables key optical switching operations for future photonic integrated circuits.

Area of Science:

Photonics and Optical Engineering
Materials Science for Optoelectronics

Background:

All-optical switching is crucial for high-speed optical communication networks.
Waveguide devices with distributed-feedback structures offer unique light manipulation capabilities.

Purpose of the Study:

To experimentally investigate the characteristics of all-optical switching.
To demonstrate the functionality of a GaInAsP/InP waveguide with a distributed-feedback structure for optical switching.

Main Methods:

Fabrication of a strip-loaded GaInAsP/InP waveguide.
Integration of a distributed-feedback structure using reactive-ion etching and electron-beam exposure.
Experimental demonstration of various optical switching operations.

Main Results:

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Last Updated: Jul 6, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Successful fabrication of the integrated waveguide-distributed feedback device.
Demonstration of several all-optical switching operations.
Specific achievement of all-optical set-reset and threshold operations.

Conclusions:

The developed GaInAsP/InP waveguide device with a distributed-feedback structure effectively enables all-optical switching.
The demonstrated set-reset and threshold operations highlight the potential for advanced photonic integrated circuits.