Nikolay Ledentsov, Jr. received his B.Sc. and M.Sc. degree from the Technical University of Berlin. His research work at the time was focused on the growth and characterization of (In)AlGaN green and UV light emitters. In 2023 he completed his PhD at the Technica University of Warsaw focusing on high-speed data transmission with IR VCSELs. As sr. engineer and technical project manager at VI Systems GmbH he is responsible for research & development of Vertical-Cavity Surface-emitting Lasers (VCSELs) for high speed optical links, manufacturing and characterization of light-emitters and photodiodes.
As sr. engineer and technical project manager at VI Systems GmbH he is responsible for research & development of Vertical-Cavity Surface-emitting Lasers (VCSELs) for high speed optical links, manufacturing and characterization of light-emitters and photodiodes.
His research team achieved multiple data transmission records with VCSELs: 100 Gbit/s NRZ, 224 Gbit/s DMT and 600 Gbit/s with SDM and others. He was involved in the first experimental demonstration of leaky VCSEL emission, pioneering work on high-speed Quantum-Dot (QD) VCSELs operating extremely high temperatures and first demonstration of >75GHz amplitude modulation in VCSELs.
Throughout his professional career, he co-authored 90 publications achieving 1000 citations, with 22 publications as first author, among them 5 invited publications presented at reputed international conferences. As project manager he managed 2 successfully completed publicly funded research projects and is currently managing 4 ongoing national and bilateral projects on quantum communication and free-space optical communication.
As sr. engineer and technical project manager at VI Systems GmbH he is responsible for research & development of Vertical-Cavity Surface-emitting Lasers (VCSELs) for high speed optical links, manufacturing and characterization of light-emitters and photodiodes.
His research team achieved multiple data transmission records with VCSELs: 100 Gbit/s NRZ, 224 Gbit/s DMT and 600 Gbit/s with SDM and others. He was involved in the first experimental demonstration of leaky VCSEL emission, pioneering work on high-speed Quantum-Dot (QD) VCSELs operating extremely high temperatures and first demonstration of >75GHz amplitude modulation in VCSELs.
Throughout his professional career, he co-authored 90 publications achieving 1000 citations, with 22 publications as first author, among them 5 invited publications presented at reputed international conferences. As project manager he managed 2 successfully completed publicly funded research projects and is currently managing 4 ongoing national and bilateral projects on quantum communication and free-space optical communication.
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QD VCSELs enable extension of the temperature stability and demonstrate threshold currents below 1 mA for operation range from 30°C to 200°C. The role of gain to cavity detuning is discussed in details. 25 Gbit/s NRZ multi-mode fiber transmission with QD VCSELs is realized at temperatures up to 180°C. Pulsed operation of QD VCSELs with 8 μm oxide aperture diameter is studied at temperatures from 30°C to 125°C and 1 W peak power is realized on 100 ns pulses at room temperature.
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