Chauvet, NicolasNicolasChauvetGirouard, PeterPeterGirouardDahlem, MarcusMarcusDahlemYoon, Jong-HyeokJong-HyeokYoonShin, DongjaeDongjaeShinOldenbeuving, RuudRuudOldenbeuving2026-09-072026-09-072026978-1-5106-9666-20277-786Xhttps://imec-publications.be/handle/20.500.12860/60220Recent advancements in Distributed Feedback (DFB) lasers have improved output power levels, offering benefits for automotive FMCW LiDAR. However, these high-power DFB lasers often show increased phase noise and broader linewidths. External Cavity Diode Lasers (ECDLs) offer an alternative, enabling high output power with narrow linewidths—especially when incorporating high-Q resonators within the external cavity. For optimal LiDAR performance, the laser must support a mode-hop-free (MHF) chirp excursion > 3 GHz, chirp rates on the order of several hundred kHz, and maintain optical output power above 500 mW with less than 1 dB variation. In photonic integrated circuit (PIC) implementations, linewidths as low as 1 kHz are achievable using high-Q resonators. However, the narrowband nature of these resonators limit the MHF tuning range to < 1 GHz and results in significant power fluctuations (3–6 dB) across the chirp range. This work presents a laser design targeting an MHF tuning range of approximately 10 GHz, with stable output power, chirp rates around 100 kHz, a linewidth below 10 kHz, and output power exceeding 500 mW—making it suitable for next-generation FMCW LiDAR in automotive applications.engProceedings paper10.1117/12.3078479WOS:001776327600022