@inproceedings{9636f8e23a4a4538b4a150b5350982d7,
title = "Numerical investigation of direct IQ modulation of spin-VCSELs for coherent communications",
abstract = "We propose and numerically investigate a method for direct in-phase quadrature (IQ) modulation of spin-controlled vertical-cavity surface-emitting lasers (spin-VCSELs) for coherent communications. In particular, an injection-locked spin-VCSEL is investigated by using spin-flip rate equations for generating quadrature amplitude modulation (QAM) signals. A polarizer 45° tilted to the polarization axis of the injected external light is used to extract the in-phase and quadrature-phase components of the output light from the injection-locked spin-VCSEL. It is confirmed that QAM signals can be generated with the proposed method successfully, and long electron spin relaxation time and small linear birefringence in the spin-VCSEL are suitable for efficiently generating clear QAM constellations with a low error vector magnitude. A detuning condition for the injection locking of the spin-VCSEL is found to be important for obtaining wide modulation bandwidth of the direct IQ modulation.",
keywords = "IQ, Injection locking, QAM, Spin polarization, VCSEL",
author = "Nobuhide Yokota and Kazuhiro Ikeda and Hiroshi Yasaka",
note = "Funding Information: This work was supported by The Murata Science Foundation and JSPS KAKENHI Grant No.19H02186. Publisher Copyright: {\textcopyright} 2020 SPIE.; Spintronics XIII 2020 ; Conference date: 24-08-2020 Through 04-09-2020",
year = "2020",
doi = "10.1117/12.2567380",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Drouhin, {Henri-Jean M.} and Jean-Eric Wegrowe and Manijeh Razeghi and Henri Jaffres",
booktitle = "Spintronics XIII",
}