title: Generation of carrier-envelope phase-stable two optical-cycle pulses at 2 μm from a noncollinear beta-barium borate optical parametric amplifier.
abstract: We report on the generation of two optical-cycle, carrier-envelope phase-stable pulses with energy of 15 μJ at central wavelength of 2 μm. Pulses of 15 fs (2.3 optical cycles) duration are obtained by difference-frequency generation, which at the same time provides passive carrier-envelope phase stabilization, and noncollinear optical parametric amplification in beta-barium borate crystal, which is shown to provide broad phase-matching bandwidth if seeded by pulses in the 1.6-2.6 μm wavelength range. Pulse compression is achieved by means of a simple propagation through the optical setup and by precisely controlling the initial chirp of the pulses to be frequency downconverted.
authors.affiliation: Department of Quantum Electronics, Vilnius University, Saulėtekio Ave. 9, Building 3, Vilnius LT-10222, Lithuania. julius.darginavicius@ff.stud.vu.lt
authors.forename: Julius
authors.initials: J
authors.lastname: Darginavičius
authors.forename: Nail
authors.initials: N
authors.lastname: Garejev
authors.forename: Audrius
authors.initials: A
authors.lastname: Dubietis
mesh_terms: D017609:Barium Compounds / Q000737:chemistry*; D001881:Borates / Q000737:chemistry*; D053844:Lasers, Solid-State; D055620:Optical Phenomena
chemical_list: D017609:Barium Compounds; D001881:Borates