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Mode shaping in semiconductor broad area lasers by monolithically integrated phase structures.

Hans-Christoph Eckstein, Uwe D Zeitner, Andreas Tünnermann

|November 2, 2013

Summary

This summary is machine-generated.

Integrating optical phase structures into semiconductor lasers improves beam quality by enhancing the fundamental mode and reducing higher-order modes. This approach allows for higher optical power extraction from broad area lasers.

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Area of Science:

Semiconductor laser physics
Optics and photonics

Background:

Broad area semiconductor lasers can achieve high optical power by widening the active region.
However, this often leads to poor beam quality due to higher-order mode amplification and optical filamentation.

Purpose of the Study:

To improve the beam quality of semiconductor broad area lasers.
To investigate methods for controlling the optical field within the laser resonator.

Main Methods:

Integration of optical phase structures directly into the waveguide of semiconductor lasers.
Designing phase elements to enlarge the gain area for the fundamental mode.
Introducing diffraction losses for higher-order modes.

Main Results:

Demonstrated an approach to influence the optical field within the laser resonator.
Achieved improved beam quality by selectively enhancing the fundamental laser mode.
Generated additional diffraction losses for higher-order modes.

Conclusions:

Optical phase structures offer a viable method for enhancing beam quality in broad area semiconductor lasers.
This technique enables higher optical power extraction with improved beam characteristics.