title: 7kW direct-liquid-cooled side-pumped Nd:YAG multi-disk laser resonator.
abstract: A direct-liquid-cooled side-pumped Nd:YAG multi-disk QCW laser resonator is presented, in which the oscillating laser propagates through multiple thin disks and cooling flow layers in Brewster angle. Twenty Nd:YAG thin disks side-pumped by LD arrays are directly cooled by flowing deuteroxide at the end surfaces. A laser output with the highest pulse energy of 17.04 J is obtained at the pulse width of 250 μs and repetition rate of 25 Hz, corresponding to an optical-optical efficiency of 34.1% and a slope efficiency of 44.5%. The maximum average output power of 7.48 kW is achieved at the repetition rate of 500 Hz. Due to thermal effects, the corresponding optical-optical efficiency decreases to 30%. Under the 12.5 kW pumping condition while not oscillating, the wavefront of a He-Ne probe passing through the gain module is as low as 0.256 μm (RMS) with the defocus and tetrafoil subtracted.
authors.forename: Ke
authors.initials: K
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Tu
authors.forename: Chunyan
authors.initials: C
authors.lastname: Jia
authors.forename: Jianli
authors.initials: J
authors.lastname: Shang
authors.forename: Xiangchao
authors.initials: X
authors.lastname: An
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liao
authors.forename: Zhi
authors.initials: Z
authors.lastname: Xu
authors.forename: Jingwei
authors.initials: J
authors.lastname: Guo
authors.forename: Jiayu
authors.initials: J
authors.lastname: Yi
authors.forename: Yi
authors.initials: Y
authors.lastname: Yu
authors.forename: Hua
authors.initials: H
authors.lastname: Su
authors.forename: Qingsong
authors.initials: Q
authors.lastname: Gao
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang
authors.forename: Wanfa
authors.initials: W
authors.lastname: Liu
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang