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Related Experiment Videos

Large phase shifts in As2S3 waveguides for all-optical processing devices.

Yinlan Ruan1, Barry Luther-Davies, Weitang Li

  • 1Centre for Ultra-high-bandwidth Devices for Optical Systems, Laser Physics Center, The Australian National University, Canberra, 0200, Australia. ylruan@yahoo.com

Optics Letters
|October 8, 2005
PubMed
Summary

Researchers observed a significant phase shift in a low-loss As2S3 waveguide. Nonlinear optical response was limited by material photosensitivity and photocrystallization below the bandgap.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nonlinear Optics

Background:

  • Chalcogenide glasses like As2S3 are promising for nonlinear optics.
  • Waveguide fabrication is crucial for enhancing light-matter interactions.

Purpose of the Study:

  • To investigate the nonlinear optical properties of As2S3 waveguides.
  • To achieve a large phase shift in a low-loss waveguide at telecommunication wavelengths.

Main Methods:

  • Fabrication of a small-core As2S3 waveguide using dry etching.
  • Characterization of optical loss and nonlinear phase shift at 1.53 microm.

Main Results:

  • Observed a large phase shift of 4.7pi.
  • Achieved a low waveguide loss of 0.2 dB/cm.

Related Experiment Videos

  • Identified photosensitivity and photocrystallization as limiting factors for nonlinear response.

    • Conclusions:

    • As2S3 waveguides demonstrate potential for nonlinear optical applications.
    • Material stability issues (photosensitivity, photocrystallization) need to be addressed for optimal performance.