title: 250-MHz synchronously pumped optical parametric oscillator at 2.25-2.6 μm and 4.1-4.9 μm.
abstract: A compact and versatile femtosecond mid-IR source is presented, based on an optical parametric oscillator (OPO) synchronously pumped by a commercial 250-MHz Er:fiber laser. The mid-IR spectrum can be tuned in the range 2.25-2.6 μm (signal) and 4.1-4.9 μm (idler), with average power from 20 to 60 mW. At 2.5 μm a minimum pulse duration of 110 fs and a power of 40 mW have been obtained. Active stabilization of the OPO cavity length has been achieved in the whole tuning range.
authors.affiliation: Dipartimento di Fisica - Politecnico di Milano and Istituto di Fotonica e Nanotecnologie -CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy. nicola.coluccelli@polimi.it
authors.forename: Nicola
authors.initials: N
authors.lastname: Coluccelli
authors.forename: Helge
authors.initials: H
authors.lastname: Fonnum
authors.forename: Magnus
authors.initials: M
authors.lastname: Haakestad
authors.forename: Alessio
authors.initials: A
authors.lastname: Gambetta
authors.forename: Davide
authors.initials: D
authors.lastname: Gatti
authors.forename: Marco
authors.initials: M
authors.lastname: Marangoni
authors.forename: Paolo
authors.initials: P
authors.lastname: Laporta
authors.forename: Gianluca
authors.initials: G
authors.lastname: Galzerano
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D009991:Oscillometry / Q000295:instrumentation*