title: Mid-IR frequency comb source spanning 4.4-5.4 μm based on subharmonic GaAs optical parametric oscillator.
abstract: Broadband mid-IR output suitable for producing 1000-nm-wide frequency combs centered at 4.9 μm was achieved in a degenerate subharmonic optical parametric oscillator (OPO) based on 500-μm-long Brewster-angled orientation-patterned GaAs crystal. The OPO was synchronously pumped at 182 MHz repetition rate by 100 fs pulses from a Cr²⁺:ZnSe laser with the central wavelength of 2.45 μm and the average power of 100 mW.
authors.affiliation: E. L. Ginzton Laboratory, 348 via Palou, Stanford University, Stanford, California 94305, USA. vodopyan@stanford.edu
authors.forename: K L
authors.initials: KL
authors.lastname: Vodopyanov
authors.forename: E
authors.initials: E
authors.lastname: Sorokin
authors.forename: I T
authors.initials: IT
authors.lastname: Sorokina
authors.forename: P G
authors.initials: PG
authors.lastname: Schunemann
mesh_terms: D000042:Absorption; D001152:Arsenicals / Q000737:chemistry*; D005708:Gallium / Q000737:chemistry*; D007259:Infrared Rays; D055620:Optical Phenomena
chemical_list: D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium