28 April 2016 Birefringence tuning of VCSELs
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Abstract
Using the elasto-optic effect we increase the frequency difference between the two orthogonally polarized modes, the so-called birefringence splitting, in standard single-mode oxide-confined GaAs-based vertical-cavity surface-emitting lasers (VCSELs). The birefringence may play an important role in the realization of ultrafast polarization modulation for high-speed data transmission. For practical implementation it is necessary to miniaturize the strain-inducing mechanism for birefringence tuning in VCSELs. The goal is the realization of integrated structures on the VCSEL chip. In this paper we discuss our work on miniaturized bending devices as the next step in achieving extremely high birefringence splitting. Furthermore measurements with integrated hotspot structures on VCSEL chips were made to reach much smaller scales for birefringence fine-tuning.
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Tobias Pusch, Tobias Pusch, Marwan Bou Sanayeh, Marwan Bou Sanayeh, Markus Lindemann, Markus Lindemann, Nils C. Gerhardt, Nils C. Gerhardt, Martin R. Hofmann, Martin R. Hofmann, Rainer Michalzik, Rainer Michalzik, "Birefringence tuning of VCSELs", Proc. SPIE 9892, Semiconductor Lasers and Laser Dynamics VII, 989222 (28 April 2016); doi: 10.1117/12.2228091; https://doi.org/10.1117/12.2228091
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