title: Yb³⁺-doped large core silica fiber for fiber laser prepared by glass phase-separation technology.
abstract: We report on the preparation and optical characteristics of an Yb(3+)-doped large core silica fiber with the active core prepared from nanoporous silica rod by the glass phase-separation technology. The measurements show that the fiber has an Yb(3+) concentration of 9811 ppm by weight, a low background attenuation of 0.02 dB/m, and absorption from Yb(3+) about 5.5 dB/m at 976 nm. The laser performance presents a high slope efficiency of 72.8% for laser emission at 1071 nm and a low laser threshold of 3 W within only 2.3 m fiber length. It is suggested that the glass phase-separation technology shows great potential for realizing active fibers with larger core and complex fiber designs.
authors.forename: Yingbo
authors.initials: Y
authors.lastname: Chu
authors.forename: Yunxiu
authors.initials: Y
authors.lastname: Ma
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Lei
authors.initials: L
authors.lastname: Liao
authors.forename: Yibo
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiongwei
authors.initials: X
authors.lastname: Hu
authors.forename: Jinggang
authors.initials: J
authors.lastname: Peng
authors.forename: Haiqing
authors.initials: H
authors.lastname: Li
authors.forename: Nengli
authors.initials: N
authors.lastname: Dai
authors.forename: Jinyan
authors.initials: J
authors.lastname: Li
authors.forename: Luyun
authors.initials: L
authors.lastname: Yang