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- W3080448954 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." @default.
- W3080448954 created "2020-09-01" @default.
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- W3080448954 date "2020-08-20" @default.
- W3080448954 modified "2023-09-25" @default.
- W3080448954 title "Numerical investigation of direct IQ modulation of spin-VCSELs for coherent communications" @default.
- W3080448954 doi "https://doi.org/10.1117/12.2567380" @default.
- W3080448954 hasPublicationYear "2020" @default.
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