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Modelocking and femtosecond pulse generation in chip-based frequency combs

2013; Optica Publishing Group; Volume: 21; Issue: 1 Linguagem: Inglês

10.1364/oe.21.001335

1094-4087

Kasturi Saha, Yoshitomo Okawachi, Bonggu Shim, Jacob S. Levy, Reza Salem, Adrea R. Johnson, Mark A. Foster, Michael R. E. Lamont, Michal Lipson, Alexander L. Gaeta,

Laser-Matter Interactions and Applications

We investigate simultaneously the temporal and optical and radio-frequency spectral properties of parametric frequency combs generated in silicon-nitride microresonators and observe that the system undergoes a transition to a mode-locked state. We demonstrate the generation of sub-200-fs pulses at a repetition rate of 99 GHz. Our calculations show that pulse generation in this system is consistent with soliton modelocking. Ultimately, such parametric devices offer the potential of producing ultra-short laser pulses from the visible to mid-infrared regime at repetition rates from GHz to THz.