Dande, G.G.DandePennanech, J.J.PennanechCharliac, C.C.CharliacKemlin, V.V.KemlinCrozatier, V.V.CrozatierGhorbel, I.I.GhorbelBillault, V.V.BillaultPan, BiweiBiweiPanSoltanian, EmadEmadSoltanianZhang, JingJingZhangRoelkens, GuntherGuntherRoelkensDahlem, MarcusMarcusDahlemSong, JeonghwanJeonghwanSongDwivedi, Sarvagya PaavanSarvagya PaavanDwivediCarbajal Altamirano, DiegoDiegoCarbajal AltamiranoCummins, CianCianCumminsSeema Saseendran, SandeepSandeepSeema SaseendranHelin, PhilippePhilippeHelinRamirez, J.J.RamirezNeel, D.D.NeelGuillet De Chatellus, H.H.Guillet De ChatellusBourderionne, J.J.Bourderionne2025-05-112025-05-1120251094-4087WOS:001479485400002https://imec-publications.be/handle/20.500.12860/45637A laser source that is both narrow-linewidth and frequency-agile is essential for FMCW applications, such as LIDAR or distributed optical fiber sensing (DOFS). In this work, we present the design and characterization of a laser architecture based on the heterogeneous integration of III-V gain material on a SiN photonic circuit that meets these specifications. By incorporating a dual-ring resonator mirror in the cavity, we achieved a linewidth of 2.4 kHz and a large frequency excursion. We obtained chirps with an amplitude of 20 GHz, with residual nonlinearities of less than 1%. A preliminary DOFS measurement was carried out, demonstrating the excellent performance of the laser.Journal article10.1364/OE.529238WOS:001479485400002