Raman‐Enabled Platicon Microcomb and Stokes Soliton in 4H‐SiC Microresonator

ABSTRACT Stimulated Raman scattering in Kerr microresonators is generally regarded as a competing nonlinear process that hinders the formation of Kerr soliton microcombs. Here, we experimentally demonstrate that the ubiquitous Raman gain in Kerr microresonators can instead be harnessed to enable efficient platicon microcomb generation in the normal‐dispersion regime. We demonstrate this mechanism in a compact silicon carbide microresonator supporting a broadband platicon microcomb spanning 1500–1700 nm with a pump‐to‐comb conversion efficiency as high as . Beyond facilitating soliton access, the Raman interaction substantially broadens the comb spectrum through the simultaneous excitation of a Stokes soliton in the same mode family, which further extends the comb spectrum beyond 1800 nm. These experimental results are corroborated by comprehensive numerical simulations based on a modified Lugiato–Lefever equation incorporating Raman–Kerr interactions. By harnessing rather than suppressing the Raman effect, our work provides new insight into Raman–Kerr interactions and establishes a promising route toward broadband platicon microcombs.