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Related Experiment Videos

Widely tunable 3.4 microm band difference frequency generation using apodized chi(2) grating.

T Umeki1, M Asobe, Y Nishida

  • 1NTT Photonics Laboratories, NTT Corporation, Kanagawa, Japan. umeki@aecl.ntt.co.jp

Optics Letters
|April 6, 2007
PubMed
Summary

We demonstrated apodization in quasi-phase-matched wavelength converters for efficient and tunable optical signal generation. This new design offers a broad bandwidth and flat phase-matching, improving performance in nonlinear optics applications.

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Area of Science:

  • Nonlinear Optics
  • Integrated Photonics
  • Materials Science

Background:

  • Quasi-phase-matching (QPM) is crucial for efficient nonlinear frequency conversion.
  • Traditional QPM devices often suffer from limited bandwidth and spectral ripples.
  • Achieving broadband and flat phase-matching is essential for tunable light sources.

Purpose of the Study:

  • To demonstrate apodization in a quasi-phase-matched wavelength converter.
  • To achieve a large bandwidth and flat phase-matching response.
  • To enable tunable difference frequency generation in the 3.4 micrometer band.

Main Methods:

  • Apodization technique applied to a quasi-phase-matched LiNbO3 ridge waveguide.
  • Fabrication of the LiNbO3 ridge waveguide.

Related Experiment Videos

  • Characterization of the wavelength converter's performance, including bandwidth, phase-matching, and conversion efficiency.

    • Main Results:

    • Successful implementation of apodization in the QPM wavelength converter.
    • Achieved a large bandwidth and a flat phase-matching response.
    • Demonstrated widely tunable 3.4 micrometer band difference frequency generation with high conversion efficiency.

    Conclusions:

    • Apodization is an effective method to enhance QPM wavelength converters.
    • The developed device offers significant improvements in bandwidth and spectral flatness.
    • This work paves the way for advanced tunable light sources in the infrared spectrum.