title: High power single-frequency Innoslab amplifier.
abstract: A laser diode array (LDA) end-pumped continuous-wave single-frequency Innoslab amplifier has been demonstrated. The Gaussian ray bundle method was used to model the light propagation in the Innoslab amplifier for the first time to the best of our knowledge. With discrete reflectors, the maximum output of 60 W with a linewidth of 44 MHz was achieved under the pump power of 245 W, corresponding to the optical-optical efficiency of 24.5%. The beam quality factor M2at the output power of 51 W in the horizontal and vertical direction was measured to be 1.4 and 1.3, respectively. The long-term power instability in 2 h was less than 0.25%.
authors.forename: Ke-Zhen
authors.initials: KZ
authors.lastname: Han
authors.forename: Jian
authors.initials: J
authors.lastname: Ning
authors.forename: Bai-Tao
authors.initials: BT
authors.lastname: Zhang
authors.forename: Yi-Ran
authors.initials: YR
authors.lastname: Wang
authors.forename: Hai-Kun
authors.initials: HK
authors.lastname: Zhang
authors.forename: Hong-Kun
authors.initials: HK
authors.lastname: Nie
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Sun
authors.forename: Jing-Liang
authors.initials: JL
authors.lastname: He