19 February 2018 Electrical birefringence tuning of VCSELs
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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, Tobias Pusch, Markus Lindemann, Markus Lindemann, Nils C. Gerhardt, Nils C. Gerhardt, Martin R. Hofmann, Martin R. Hofmann, Rainer Michalzik, 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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