title: A saturable absorber Q-switched all-fiber ring laser.
abstract: We propose a simple design of a saturable absorber Q-switched all-fiber ring laser. By locating a saturable absorber fiber in the intensity-enhanced section of a ring resonator, the laser is passively Q-switched. A set of location-dependent rate equations is established for Q-switching modeling. The design has been numerically and experimentally demonstrated using Er(3+)-doped fiber at the emission wavelength of 1550 nm. A single-mode Q-switched pulse with pulse energy of 0.37 microJ and pulse duration of 218 ns was achieved with 980-nm pump power near 7 mW.
authors.affiliation: Lasers and Photonics Laboratory, Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan City, Taiwan. tzongyow@mail.ncku.edu.tw
authors.forename: Tzong-Yow
authors.initials: TY
authors.lastname: Tsai
authors.forename: Yen-Cheng
authors.initials: YC
authors.lastname: Fang