title: Nd:YAG ceramic laser obtained high slope-efficiency of 62% in high power applications.
abstract: By using quite uniformly nine-stacks side-around arranged compact pumping system, a high power Nd:YAG ceramic quasi-CW laser with high slope efficiency of 62% has been demonstrated. With 450 W quasi-CW stacked laser diode bars pumping at 808 nm, performance of the Nd:YAG ceramic laser with different output coupling mirrors has been investigated. Optimum output power of 236 W at 1064 nm was obtained and corresponding optical-to-optical conversion efficiency was as high as 52.5%. The laser system operated quite stably and no saturation phenomena have been observed, which means higher output laser power could be obtained if injecting higher pumping power. The still-evolving Nd:YAG ceramics are potential super excellent media for high power practical laser applications.
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Qi
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Zhu
authors.forename: Qihong
authors.initials: Q
authors.lastname: Lou
authors.forename: Jianghua
authors.initials: J
authors.lastname: Ji
authors.forename: Jingxing
authors.initials: J
authors.lastname: Dong
authors.forename: Yunrong
authors.initials: Y
authors.lastname: Wei