Publications

Electrical birefringence tuning of VCSELs

Pusch, T. and Lindemann, M. and Gerhardt, N.C. and Hofmann, M.R. and Michalzik, R.

PROCEEDINGS OF SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING
Volume: 10552 Pages:
DOI: 10.1117/12.2295917
Published: 2018

Abstract
The birefringence splitting B, which is the frequency difference between the two fundamental linear polarization modes in vertical-cavity surface-emitting lasers (VCSELs), is the key parameter determining the polarization dynamics of spin-VCSELs that can be much faster than the intensity dynamics. For easy handling and control, electrical tuning of B is favored. This was realized in an integrated chip by thermally induced strain via asymmetric heating with a birefringence tuning range of 45 GHz. In this paper we present our work on VCSEL structures mounted on piezoelectric transducers for strain generation. Furthermore we show a combination of both techniques, namely VCSELs with piezo-thermal birefringence tunability. © 2018 SPIE.

« back