title: Broadband emission from Cr-doped fibers fabricated by drawing tower.
abstract: We report on the first fabrication of a Cr-doped fiber using a drawing-tower method with Cr:YAG as the core of the preform. Both Cr3+ and Cr4+ ions coexist in the Cr-doped fiber, and the amplified spontaneous emission (ASE) spectrum shows a broadband emission of 1.2 to 1.55 mum which can not be realized by using currently available fiber amplifiers. This indicates that the new Cr-doped fibers have the potential for being used as a broadband fiber amplifier to cover the bandwidth of the entire 1.3-1.6 mum range which exhibit 300 nm usable spectral bands.
authors.forename: Yi-Chung
authors.initials: YC
authors.lastname: Huang
authors.forename: Yu-Kuan
authors.initials: YK
authors.lastname: Lu
authors.forename: Jian-Cheng
authors.initials: JC
authors.lastname: Chen
authors.forename: Yi-Cheng
authors.initials: YC
authors.lastname: Hsu
authors.forename: Yu-Ming
authors.initials: YM
authors.lastname: Huang
authors.forename: Sheng-Lung
authors.initials: SL
authors.lastname: Huang
authors.forename: Wood-Hi
authors.initials: WH
authors.lastname: Cheng