Soliton Pulses in Photonic Crystal Fabry-Perot Microresonators
arXiv:2206.10410 · doi:10.1364/OPTICA.480789
Abstract
Dissipative Kerr solitons (DKSs) in high-Q microresonators enable applications in sensing, communication, and signal processing. Until now, DKSs driven by continuous-wave (CW) lasers are exclusively generated in ring-type resonators. Complementary to ring-type resonators, Fabry-Perot resonators could enable new approaches to dispersion engineering, addressing a key challenge of DKS technology. However, DKS generation in a CW-driven Fabry-Perot microresonator has not yet been achieved. Here, we demonstrate for the first time CW-driven DKSs in a high-Q Fabry-Perot microresonator. Fabricated in a wafer-level process, two photonic crystal reflectors in a waveguide form the chip-integrated resonator and define its dispersion. The intrinsic Q-factor of 4 million is propagation-loss limited. In principle, each cell of the photonic crystal reflector can be tailored, opening a design space beyond traditional dispersion engineering, with potential for future extension of DKSs to visible and other currently inaccessible wavelengths. Beyond DKSs, this creates opportunities for filter-driven pulse formation, engineered spectra and broadband phase-matching in microresonators.
9 pages, 4 figures
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