title: Double-clad Cr4+:YAG crystal fiber amplifier.
abstract: A novel double-clad Cr4+:YAG crystal fiber is demonstrated by use of a codrawing laser-heated pedestal growth method. Up to 10 dB of gross gain at a wavelength of 1.52 microm is achieved at a pump power of 0.83 W, which, to our knowledge, is the first Cr4+-doped fiber amplifier in the optical fiber communication band.
authors.affiliation: Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
authors.forename: C Y
authors.initials: CY
authors.lastname: Lo
authors.forename: K Y
authors.initials: KY
authors.lastname: Huang
authors.forename: J C
authors.initials: JC
authors.lastname: Chen
authors.forename: C Y
authors.initials: CY
authors.lastname: Chuang
authors.forename: C C
authors.initials: CC
authors.lastname: Lai
authors.forename: S L
authors.initials: SL
authors.lastname: Huang
authors.forename: Y S
authors.initials: YS
authors.lastname: Lin
authors.forename: P S
authors.initials: PS
authors.lastname: Yeh