title: Highly efficient second, third and fourth harmonic generation from a two- branch femtosecond erbium fiber source.
abstract: We report on highly efficient second, third and fourth harmonic generation from a femtosecond erbium-doped fiber source operating at 98 MHz repetition rate. By use of quasi-phase-matching in fan-out poled MgO:LiNbO(3), we generate pulses at 770 nm, 520 nm and 390 nm, with corresponding average powers of 120 mW, 55 mW and 6 mW, respectively. Our device can be employed as a two-color source providing radiation from ultraviolet to near infrared.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Moutzouris
authors.forename: Florian
authors.initials: F
authors.lastname: Sotier
authors.forename: Florian
authors.initials: F
authors.lastname: Adler
authors.forename: Alfred
authors.initials: A
authors.lastname: Leitenstorfer