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Related Experiment Videos

Wavelength switchable semiconductor laser using half-wave V-coupled cavities.

Jian-Jun He1, Dekun Liu

  • 1Centre for Integrated Optoelectronics, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, PR China 310027. jjhe@zju.edu.cn

Optics Express
|June 11, 2008
PubMed
Summary
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A novel semiconductor laser offers digitally switchable wavelengths using coupled cavities and a Vernier effect for a wider tuning range. This design enables simultaneous space switching, variable attenuation, and high-speed modulation.

Area of Science:

  • Optoelectronics
  • Semiconductor Devices
  • Photonics

Background:

  • Semiconductor lasers are crucial for optical communications.
  • Wavelength tunability and modulation capabilities are key performance metrics.
  • Existing tunable laser designs face limitations in range and functionality.

Purpose of the Study:

  • To propose a new semiconductor laser structure with digitally switchable wavelength.
  • To enhance wavelength tuning range and enable multiple functionalities.
  • To present the design principles and numerical validation of the proposed device.

Main Methods:

  • Utilizing two coupled cavities with different optical path lengths.
  • Incorporating a reflective 2x2 half-wave optical coupler with specific phase properties.

Related Experiment Videos

  • Employing the Vernier effect to expand the switchable wavelength range.
  • Integrating a Mach-Zehnder interferometer with deep-etched trenches for additional functionalities.

    • Main Results:

    • Achieved high single-mode selectivity through optimized coupling coefficients.
    • Demonstrated a significantly increased switchable wavelength range via the Vernier effect.
    • Validated the potential for simultaneous space switching, variable attenuation, and high-speed modulation.

    Conclusions:

    • The proposed semiconductor laser structure offers digitally switchable wavelength capabilities.
    • The design integrates multiple functionalities, enhancing its applicability in optical systems.
    • Numerical results support the feasibility and effectiveness of the proposed laser architecture.