title: Comparative studies for Cr4+:YAG crystal and AlGaInAs semiconductor used as a saturable absorber in Q-switched Yb-doped fiber lasers.
abstract: We demonstrate comparative studies for Cr(4+):YAG crystal and AlGaInAs quantum-well (QW) used as a saturable absorbers in passively Q-switched Yb-doped fiber lasers. Both saturable absorbers were designed to be possessed of nearly the same initial transmission. Under a pump power of 24 W, the average output powers were up to 14.4 W and 13.8 W obtained with the AlGaInAs QWs and with the Cr(4+):YAG crystal, respectively. The maximum pulse energies obtained with the Cr(4+):YAG crystal and with the AlGaInAs QWs were found to be 0.35 mJ and 0.45 mJ, respectively.
authors.affiliation: Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.
authors.forename: J Y
authors.initials: JY
authors.lastname: Huang
authors.forename: W Z
authors.initials: WZ
authors.lastname: Zhuang
authors.forename: W C
authors.initials: WC
authors.lastname: Huang
authors.forename: K W
authors.initials: KW
authors.lastname: Su
authors.forename: C
authors.initials: C
authors.lastname: Hu
authors.forename: K F
authors.initials: KF
authors.lastname: Huang
authors.forename: Y F
authors.initials: YF
authors.lastname: Chen
mesh_terms: D000535:Aluminum / Q000737:chemistry; D001151:Arsenic / Q000737:chemistry; D002857:Chromium / Q000737:chemistry; D003460:Crystallization; D004867:Equipment Design; D005708:Gallium / Q000737:chemistry; D007204:Indium / Q000737:chemistry; D007834:Lasers; D009991:Oscillometry; D012666:Semiconductors; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D007204:Indium; D002857:Chromium; D005708:Gallium; D000535:Aluminum; D015018:Ytterbium; D001151:Arsenic