title: High-power 1018 nm ytterbium-doped fiber laser and its application in tandem pump.
abstract: In this paper, we present our experimental results of a high-power 1018 nm fiber laser and its usage in tandem pump. A record output power of 476 W 1018 nm fiber laser is obtained with an efficiency of 78.2%. Utilizing a specially designed gain fiber, a one-stage high-power monolithic fiber amplifier tandem pumped by six 1018 nm fiber lasers is assembled. A 110 W 1090 nm seed is amplified to 2140 W, and the efficiency is as high as 86.9%. The beam quality factor M2 is measured to be 1.9. Limitations and possible solutions for purchasing higher output power are discussed.
authors.forename: Hu
authors.initials: H
authors.lastname: Xiao
authors.forename: Jinyong
authors.initials: J
authors.lastname: Leng
authors.forename: Hanwei
authors.initials: H
authors.lastname: Zhang
authors.forename: Liangjin
authors.initials: L
authors.lastname: Huang
authors.forename: Jiangming
authors.initials: J
authors.lastname: Xu
authors.forename: Pu
authors.initials: P
authors.lastname: Zhou