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Polarization Modulation in Quantum Dot Spin-VCSELs for Ultrafast Data Transmission
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  • Christos Tselios ,
  • Panagiotis Georgiou ,
  • Christina (Tanya) Politi ,
  • Antonio Hurtado ,
  • Dimitris Alexandropoulos
Christos Tselios
University of Peloponnese

Corresponding Author:[email protected]

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Panagiotis Georgiou
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Christina (Tanya) Politi
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Antonio Hurtado
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Dimitris Alexandropoulos
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Abstract

Spin-Vertical Cavity Surface Emitting Lasers (spin-VCSELs) are undergoing increasing research effort for new paradigms in high-speed optical communications and photon-enabled computing. To date research in spin-VCSELs has mostly focused on Quantum-Well (QW) devices. However, novel Quantum-Dot (QD) spin-VCSELs, offer enhanced parameter controls permitting the effective, dynamical and ultrafast manipulation of their light emission’s polarization. In the present contribution we investigate in detail the operation of QD spin-VCSELs subject to polarization modulation for their use as ultrafast light sources in optical communication systems. We reveal that QD spin-VCSELs outperform their QW counterparts in terms of modulation efficiency, yielding a nearly two- fold improvement. We also analyse the impact of key device parameters in QD spin-VCSELs (e.g. photon decay rate and intra-dot relaxation rate) on the large signal modulation performance with regard to optical modulation amplitude and eye-diagram opening penalty. We show that in addition to exhibiting enhanced polarization modulation performance for data rates up to $250Gb/s$, QD spin-VCSELs enable operation in dual (ground and excited state) emission thus allowing future exciting routes for multiplexing of information in optical communication links.
Oct 2023Published in IEEE Journal of Quantum Electronics volume 59 issue 5 on pages 1-8. 10.1109/JQE.2023.3296732