Siddharth, AnatLihachev, GrigoryWang, Rui NingJi, XinruQiu, ZheruRiemensberger, JohannKippenberg, Tobias J.2025-01-262025-01-262025-01-25202310.1364/CLEO_AT.2023.STu3P.32-s2.0-85191481977https://infoscience.epfl.ch/handle/20.500.14299/245211We demonstrate a novel class of lasers, based on the hybrid integration of an RSOA with an extended-distributed Bragg reflector (E-DBR) laser cavity implemented on a Si3N4 chip with microheaters. This enables us to reach sub-kHz laser linewidth with more than 30 mW output power and mode-hop free tuning range upto 62.4 GHz.falsetext::conference output::conference proceedings::conference paper