title: Milliwatt-level frequency combs in the 8-14 μm range via difference frequency generation from an Er:fiber oscillator.
abstract: We report on the generation of mid-infrared (mid-IR) pulses with a maximum average optical power of 4 mW and wide tunability in the 8-14 μm range via difference frequency generation (DFG) in GaSe from an Er:fiber laser oscillator. The DFG process is seeded with self-frequency shifted Raman solitons that are shown to be phase coherent within the whole tuning range, from 1.76 to 1.93 μm. Interference measurements between adjacent pulses at the idler wavelengths attest coherence transfer to the mid-IR.
authors.affiliation: Istituto di Fotonica e Nanotecnologie-CNR and Dipartimento di Fisica-Politecnico di Milano, Milano, Italy. alessio.gambetta@polimi.it
authors.forename: Alessio
authors.initials: A
authors.lastname: Gambetta
authors.forename: Nicola
authors.initials: N
authors.lastname: Coluccelli
authors.forename: Marco
authors.initials: M
authors.lastname: Cassinerio
authors.forename: Davide
authors.initials: D
authors.lastname: Gatti
authors.forename: Paolo
authors.initials: P
authors.lastname: Laporta
authors.forename: Gianluca
authors.initials: G
authors.lastname: Galzerano
authors.forename: Marco
authors.initials: M
authors.lastname: Marangoni