title: Narrow-linewidth widely tunable hybrid Q-switched double-clad fiber laser.
abstract: A laser-diode-pumped Yb-doped double-clad fiber laser operating in a hybrid Q-switched regime has been demonstrated. With pulsed pump light and stimulated Brillouin scattering of the gain fiber as the Q-switching mechanisms, the laser generated nanosecond pulses with a stable repetition rate. A single-pulse energy of as much as 143.1 microJ with a peak power of 28.6 kW was obtained. Use of an external-cavity diffraction grating in the Littman configuration permitted tuning of the laser wavelength over a 15.7-THz range from 1080 to 1140 nm, and a linewidth of 0.04 nm over the whole tuning range was achieved.
authors.affiliation: Institute of Physics, Nankai University, Tianjin 300071, China. fanyaxian@eyou.com
authors.forename: Ya-Xian
authors.initials: YX
authors.lastname: Fan
authors.forename: Fu-Yun
authors.initials: FY
authors.lastname: Lu
authors.forename: Shu-Ling
authors.initials: SL
authors.lastname: Hu
authors.forename: Ke-Cheng
authors.initials: KC
authors.lastname: Lu
authors.forename: Hong-Jie
authors.initials: HJ
authors.lastname: Wang
authors.forename: Guang-Yin
authors.initials: GY
authors.lastname: Zhang
authors.forename: Xiao-Yi
authors.initials: XY
authors.lastname: Dong