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Simulation of a ridge-type semiconductor laser with transversal diffraction gratings
Tatsuhiro Hirose1, Takahiro Numai1
1College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577 Japan.
Optical and Quantum Electronics
|May 2, 2022
Summary
This study enhances semiconductor laser stability by integrating diffraction gratings. This design prevents output kinks in ridge-type lasers, improving performance for specific mesa widths.
Area of Science:
- Optics and Photonics
- Semiconductor Device Physics
Background:
- Ridge-type semiconductor lasers often exhibit kinks in their current-light output curves, limiting performance.
- Maintaining a stable fundamental horizontal transverse mode is crucial for laser efficiency and reliability.
Purpose of the Study:
- To improve the stability of the fundamental horizontal transverse mode in ridge-type semiconductor lasers.
- To eliminate kinks in current-light output curves using integrated diffraction gratings.
Main Methods:
- Incorporation of transversal diffraction gratings into the ridge structure.
- Design and optimization of the number of grating periods relative to mesa width.
Main Results:
- Kinks were successfully suppressed in current-light output curves for mesa widths below a specific threshold ( m).
- The fundamental horizontal transverse mode stability was significantly enhanced.
Conclusions:
- Transversal diffraction gratings are an effective method for stabilizing the transverse mode in ridge-type semiconductor lasers.
- This grating design overcomes limitations of conventional ridge lasers by preventing output kinks.
