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Stabilization of broad-area semiconductor laser sources by simultaneous index and pump modulations
Optics Letters
|June 2, 2018
Summary
Broad-area semiconductor lasers are stabilized using 2D periodic modulations in refractive index and gain-loss profiles. This suppresses instabilities, yielding bright, narrow output beams for improved laser performance.
Area of Science:
- Optics and Photonics
- Semiconductor Device Physics
Background:
- Broad-area semiconductor lasers are prone to pattern-forming instabilities.
- These instabilities limit beam quality and output power.
Purpose of the Study:
- To demonstrate efficient stabilization of broad-area semiconductor amplifiers and lasers.
- To suppress pattern-forming instabilities and achieve high-quality output beams.
Main Methods:
- Introducing simultaneous two-dimensional periodic modulations.
- Modulating both refractive index and pump (gain-loss) profiles.
- Analyzing stabilization as a function of pump current and linewidth enhancement factor.
Main Results:
- Achieved efficient stabilization of laser emission.
- Suppressed pattern-forming instabilities through coupled index and gain-loss modulations.
- Obtained highly stable and bright narrow output beams.
Conclusions:
- Two-dimensional periodic modulations in refractive index and gain-loss are effective for stabilizing broad-area semiconductor lasers.
- The developed method enhances beam quality and output stability.
- Device performance is tunable via pump current and linewidth enhancement factor.
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