Dissipative Kerr soliton generation at 2μm in a silicon nitride microresonator

• DOI: 10.1364/oe.515225
• Publication Date: 2024-02-19T17:00:27Z
• Authors: Anamika Nair Karu...; Marco Clementi; Christian Lafforgue; Ozan Yakar; Anton Stroganov; Poul Varming; Minhao Pu; Kresten Yvind; Patrick Montague; Camille-Sophie Brès
• Keywords: Dissipative soliton

Chip-scale optical frequency combs enable the generation of highly-coherent pulsed light at gigahertz-level repetition rates, with potential technological impact ranging from telecommunications to sensing and spectroscopy. In combination techniques such as dual-comb spectroscopy, their utilization would be particularly beneficial for molecular species in mid-infrared spectrum, an integrated fashion. However, few demonstrations direct microcomb within this spectral region have been showcased so far. work, we report Kerr soliton microcombs silicon nitride photonics. Leveraging a high-Q microresonator, our device achieves under milliwatt-level pumping 1.97 µm, generated spectrum encompassing 422 nm bandwidth extending up 2.25 µm. The use dual scheme allows reliable access several comb states, including primary combs, modulation instability well multi- single-soliton latter exhibiting high stability low phase noise. Our work extends domain based towards using accessible factory-grade technology lays foundations realization fully sources.