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Related Experiment Video

Updated: Jun 20, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Feedback-enhanced bistability in grating coupling into InSb waveguides.

G Assanto¹, J E Ehrlich, G I Stegeman

¹Optical Sciences Center, University of Arizona, Tucson, Arizona 85721, USA.

|September 22, 2009

Summary

This summary is machine-generated.

Bistability in optical waveguides is enhanced by adding a second counterpropagating beam. This study demonstrates an integrated device using a nonlinear grating to achieve this effect for improved optical switching.

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Last Updated: Jun 20, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Writing Bragg Gratings in Multicore Fibers

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Published on: April 20, 2016

Area of Science:

Nonlinear optics
Integrated photonics
Waveguide optics

Background:

Bistability in optical systems is crucial for applications like optical switching and memory.
Diffusive nonlinearities in waveguides can lead to bistable phenomena.
Grating coupling is a method for efficiently coupling light into waveguides.

Purpose of the Study:

To investigate the enhancement of waveguide bistability using a second counterpropagating beam.
To demonstrate an integrated device for enhanced optical bistability.
To explore the role of nonlinear distributed-feedback gratings in this phenomenon.

Main Methods:

Utilizing grating coupling to introduce light into a waveguide with diffusive nonlinearity.
Introducing a second, counterpropagating guided-wave beam.
Employing a nonlinear distributed-feedback grating for beam retroreflection.
Fabricating and testing an integrated photonic device.

Main Results:

The presence of a second counterpropagating beam significantly enhances the observed bistability.
The integrated device successfully demonstrated the enhanced bistability effect.
The nonlinear grating effectively retroreflected the incoupled beam, contributing to the enhancement.

Conclusions:

Counterpropagating beams offer a viable method for enhancing bistability in nonlinear waveguides.
Integrated devices incorporating nonlinear gratings are effective for achieving enhanced optical bistability.
This work paves the way for advanced optical signal processing and switching applications.