Suppressing spatio-temporal lasing instabilities with wave-chaotic microcavities
Abstract
Spatio-temporal instabilities are widespread phenomena resulting from complexity and nonlinearity. In broad-area edge-emitting semiconductor lasers, the nonlinear interactions of multiple spatial modes with the active medium can result in filamentation and spatio-temporal chaos. These instabilities degrade the laser performance and are extremely challenging to control. We demonstrate a powerful approach to suppress spatio-temporal instabilities using wave-chaotic or disordered cavities. The interference of many propagating waves with random phases in such cavities disrupts the formation of self-organized structures like filaments, resulting in stable lasing dynamics. Our method provides a general and robust scheme to prevent the formation and growth of nonlinear instabilities for a large variety of high-power lasers.
Cite
@article{arxiv.1802.02028,
title = {Suppressing spatio-temporal lasing instabilities with wave-chaotic microcavities},
author = {Stefan Bittner and Stefano Guazzotti and Yongquan Zeng and Xiaonan Hu and Hasan Yılmaz and Kyungduk Kim and Sang Soon Oh and Qi Jie Wang and Ortwin Hess and Hui Cao},
journal= {arXiv preprint arXiv:1802.02028},
year = {2018}
}