Ostrovskis, ArmandsArmandsOstrovskisKim, MinkyuMinkyuKimCirjulina, DarjaDarjaCirjulinaSalgals, TomsTomsSalgalsKoenigsmann, MichaelMichaelKoenigsmannKrüger, BenjaminBenjaminKrügerPittalà, FabioFabioPittalàZhang, LuLuZhangYu, XianbinXianbinYuSchatz, RichardRichardSchatzGruen, MarkusMarkusGruenLouchet, HadrienHadrienLouchetJahn, RobertRobertJahnYamaguchi, KazuoKazuoYamaguchiBobrovs, VjaceslavsVjaceslavsBobrovsDe Heyn, PeterPeterDe HeynPang, XiaodanXiaodanPangOzolins, OskarsOskarsOzolinsKruger, BenjaminBenjaminKrugerPittala, FabioFabioPittala2026-10-282026-10-282026979-8-3315-7022-41949-2081https://imec-publications.be/handle/20.500.12860/60626To address growing AI/ML bandwidth and energy efficiency demands, we propose an O-band ring resonator modulator (RRM) with a vertical PN-junction for high-speed optical interconnects. We demonstrate up to 280 Gb/s PAM4 and 250 Gb/s PAM6 optical-amplification-free transmission over 500 m SMF, meeting HD-FEC requirements.engProceedings paper10.1109/siphotonics68911.2026.11520755WOS:001893754900049