Temporal Solitons in Nano-Photonic Microresonators: From Fundamental Soliton Dynamics to Ultrashort Laser Pulses to Visible Frequency Combs
Technical Report,01 Mar 2015,28 Feb 2019
Swiss Federal Institute of Technology Lausanne Lausanne Switzerland
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Our research has firstly focused on development of the platform for on-chip DKS-based frequency comb generation. Primarily, this platform consists of chip-integrated silicon nitride waveguides. Improvements to pumping techniques has resulted in the formation of large-bandwidth, smooth single-DKS combs spanning first two-thirds of an octave, then a full octave. DKS have also been generated centered at 1 m, and in three separated spatial modes of the microresonator. Further improvements to the quality and loss characteristics of these waveguides enabled generation of DKS combs at lower input threshold powers and at lower microwave domainline spacing. Secondly, we have demonstrated techniques for applications using microresonator-based DKS. In collaboration with the group of Prof. Christian Koos at KIT, we demonstrated a source for massively parallel telecommunications, and a dual-comb based method for ultrafast distance measurement. We engaged in a fruitful collaboration as part of this project with the group of Prof. Alan Willner at the University of Southern California, producing works such as optical multicasting and electro-optic augmentation of the frequency comb. In further collaborations, we have also demonstrated astro-spectrometer calibration, optical coherence tomography, and ultralow-noise microwave generation. Finally, we have experimentally investigated the fundamental physics and dynamics of DKS and their relationship to dissipative systems in general. Such dynamics include the emission of analogous Cherenkov radiation from DKS, the impact of stimulated Raman scattering, breathing of dissipative solitons based on the intrinsic dynamics of Kerr resonators or caused by interactions between different spatial modes, and the formation of perfect crystal states of DKS. Our research has been further supplemented with advancements in soliton-based supercontinuum generation in silicon nitride waveguides, generating light into the mid-IR domain.
- Lasers and Masers