title: Modelocking and femtosecond pulse generation in chip-based frequency combs.
abstract: 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.
authors: School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, USA.
authors: Kasturi
authors: K
authors: Saha
authors: Yoshitomo
authors: Y
authors: Okawachi
authors: Bonggu
authors: B
authors: Shim
authors: Jacob S
authors: JS
authors: Levy
authors: Reza
authors: R
authors: Salem
authors: Adrea R
authors: AR
authors: Johnson
authors: Mark A
authors: MA
authors: Foster
authors: Michael R E
authors: MR
authors: Lamont
authors: Michal
authors: M
authors: Lipson
authors: Alexander L
authors: AL
authors: Gaeta