Stabilization of Broad Area Semiconductor Laser sources by simultaneous index and pump modulations

TL;DR

This paper demonstrates that simultaneous two-dimensional index and pump modulations can effectively stabilize broad area semiconductor lasers, suppressing pattern instabilities and producing stable, bright, narrow beams, with performance depending on pump current and linewidth enhancement.

Contribution

The study introduces a novel stabilization method using combined index and pump modulations in two dimensions for broad area semiconductor lasers.

Findings

Pattern instabilities are suppressed by combined modulations.

Stable, bright, narrow beams are achieved.

Stabilization performance varies with pump current and linewidth enhancement.

Abstract

We show that the emission of broad area semiconductor amplifiers and lasers can be efficiently stabilized by introducing, two-dimensional periodic modulations simultaneously on both the refractive index and the pump (gain-loss) profiles, in the transverse and longitudinal directions. The interplay between such index and gain-loss modulations efficiently suppresses the pattern forming instabilities, leading to highly stable and bright narrow output beams from such sources. We also determine the stabilization performance of the device as a function of pump current and linewidth enhancement factor.