title: Numerical characterization of Yb-signal-aided cladding-pumped Er:Yb-codoped fiber amplifiers.
abstract: In this Letter, high-power cladding-pumped Er:Yb-codoped fiber amplifiers (EYDFAs) coseeded with a Yb-band signal are numerically characterized according to the wavelength and power of the aiding signal, the length of the gain fiber, and the wavelength of the pump. The results show that properly designing these parameters not only helps to suppress the parasitic lasing and improve the pump conversion efficiency but also helps to improve the output power stability of high-power EYDFAs.
authors.affiliation: College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China. hanqun@tju.edu.cn
authors.forename: Qun
authors.initials: Q
authors.lastname: Han
authors.forename: Yang
authors.initials: Y
authors.lastname: He
authors.forename: Zhaoxia
authors.initials: Z
authors.lastname: Sheng
authors.forename: Weiyi
authors.initials: W
authors.lastname: Zhang
authors.forename: Jiping
authors.initials: J
authors.lastname: Ning
authors.forename: Hai
authors.initials: H
authors.lastname: Xiao