Yb-doped large-mode-area laser fiber fabricated by halide-gas-phase-doping technique. (24th April 2015)

• Record Type: Journal Article
• Authors: Peng, Kun; Wang, Yuying; Ni, Li; Wang, Zhen; Gao, Cong; Zhan, Huan; Wang, Jianjun; Jing, Feng; Lin, Aoxiang
• Is Part Of: Laser physics. Volume 25:Number 6(2015:Jun.)
• Publication Date: 2015-04-24
• Subjects: modified chemical vapor deposition -- fiber laser -- large-mode-are silica fiber -- rare-earth halide; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1054-660X/25/6/065801
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: In this manuscript, we designed a rare-earth-halide gas-phase-doping setup to fabricate a large-mode-area fiber for high power laser applications. YbCl3 and AlCl3 halides are evaporated, carried respectively and finally mixed with usual host gas material SiCl4 at the hot zone of MCVD system. Owing to the all-gas-phasing reaction process and environment, the home-made Yb-doped fiber preform has a homogeneous large core and modulated refractive index profile to keep high beam quality. The drawn fiber core has a small numerical aperture of 0.07 and high Yb concentration of 9500 ppm. By using a master oscillator power amplifier system, nearly kW-level (951 W) laser output power was obtained with a slope efficiency of 83.3% at 1063.8 nm, indicating the competition and potential of the halide-gas-phase-doping technique for high power laser fiber fabrication.