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A single-mode laser based on asymmetric Bragg reflection waveguides.

Yu Li1, Yanping Xi, Xun Li

  • 1Department of Electrical and Computer Engineering, McMaster University, Ontario, Canada. li222@mcmaster.ca

Optics Express
|June 25, 2009
PubMed
Summary
This summary is machine-generated.

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This study presents a single-mode laser design using an asymmetric Bragg reflection waveguide (BRW) for efficient mode selection. The proposed silicon-based BRW achieves a high side-mode suppression ratio (SMSR), demonstrating its performance feasibility.

Area of Science:

  • Photonics and Optical Engineering
  • Semiconductor Lasers
  • Nanomaterials

Background:

  • Achieving single oscillation-mode operation in lasers is crucial for many applications.
  • Existing methods for mode selection can be complex or inefficient.
  • Asymmetric waveguide structures offer potential for improved mode control.

Purpose of the Study:

  • To design and analyze a single oscillation-mode laser.
  • To implement an effective mode selection mechanism using an asymmetric Bragg reflection waveguide (BRW).
  • To demonstrate the feasibility of a silicon-based BRW laser for high side-mode suppression ratio (SMSR).

Main Methods:

  • Design and theoretical analysis of an asymmetric waveguide structure.
  • Utilizing an asymmetric Bragg reflection waveguide (BRW) for mode selection.

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  • Considering a silicon-based quasi-one-dimensional BRW with Er-doped Si-nanocrystal in a silicon oxide core.
  • Examining guidance properties and threshold conditions.

    • Main Results:

    • The asymmetric BRW effectively realizes single oscillation-mode operation.
    • High side-mode suppression ratio (SMSR) is achieved, confirming the mode selection mechanism's efficacy.
    • Guidance properties and threshold conditions verify the design's performance feasibility.

    Conclusions:

    • The proposed asymmetric BRW laser design is effective for achieving single oscillation-mode operation.
    • The silicon-based BRW with Er-doped Si-nanocrystal is a viable structure for high SMSR lasers.
    • The design procedure and performance feasibility are validated through analysis.