Modelocking and Femtosecond Pulse Generation in Chip-Based Frequency Combs
Abstract
Development of ultrashort pulse sources has had an immense impact on condensed-matter physics, biomedical imaging, high-field physics, frequency metrology, telecommunications, nonlinear optics, and molecular spectroscopy. Although numerous advancements of such sources have been made, it remains a challenge to create a highly compact, robust platform capable of producing femtosecond pulses over a wide range of wavelengths, durations, and repetition rates. Recent observations of frequency comb generation via cascaded parametric oscillation in microresonators11 suggest a path for achieving this goal. Here we investigate the temporal and spectral properties of parametric combs generated in silicon-nitride microresonators and observe a transition to passive modelocking of the comb consistent with soliton-pulse formation, resulting in the generation of 160-fs pulses at a 99-GHz repetition rate. This platform offers the prospect of producing pulses from 10 fs to a few ps at repetition rates from 10 GHz to > 1 THz and over a wavelength range of 0.8 - 6 \mu m.
Keywords
Cite
@article{arxiv.1211.1096,
title = {Modelocking and Femtosecond Pulse Generation in Chip-Based Frequency Combs},
author = {Kasturi Saha and Yoshitomo Okawachi and Bonggu Shim and Jacob S. Levy and Reza Salem and Adrea R. Johnson and Mark A. Foster and Michael R. E. Lamont and Michal Lipson and Alexander L. Gaeta},
journal= {arXiv preprint arXiv:1211.1096},
year = {2015}
}