19 February 2018 Electrical birefringence tuning of VCSELs
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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.
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Tobias Pusch, Markus Lindemann, Nils C. Gerhardt, Martin R. Hofmann, Rainer Michalzik, "Electrical birefringence tuning of VCSELs", Proc. SPIE 10552, Vertical-Cavity Surface-Emitting Lasers XXII, 105520A (19 February 2018); doi: 10.1117/12.2295917; https://doi.org/10.1117/12.2295917
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