title: Highly efficient, narrow-linewidth, and single-frequency actively and passively Q-switched fiber-bulk hybrid Er:YAG lasers operating at 1645 nm.
abstract: High power, highly efficient single frequency oscillation of Er:YAG fiber-bulk hybrid laser at 1645 nm is demonstrated in actively and passively Q-switched operation modes. The slope efficiencies in the active and passive Q-switched operation reached 75% and 20%, respectively, with the record output powers in the narrow-linewidth and single longitudinal mode regimes of operation.
authors.affiliation: UAB Department of Physics, 310 Campbell Hall, 1300 University Blvd., Birmingham, AL 35294, USA. moskalev@uab.edu
authors.forename: Igor S
authors.initials: IS
authors.lastname: Moskalev
authors.forename: Vladimir V
authors.initials: VV
authors.lastname: Fedorov
authors.forename: Valentin P
authors.initials: VP
authors.lastname: Gapontsev
authors.forename: Denis V
authors.initials: DV
authors.lastname: Gapontsev
authors.forename: Nikolai S
authors.initials: NS
authors.lastname: Platonov
authors.forename: Sergey B
authors.initials: SB
authors.lastname: Mirov