title: Noncritically phase-matched fourth-harmonic generation of Nd:glass lasers and design of final optics assembly.
abstract: The noncritically phase-matched (NCPM) fourth-harmonic generation (FHG) with partially deuterated dihydrogen phosphate (KD*P) crystal at an Nd:glass laser radiation wavelength of 1053.1 nm has been confirmed. NCPM FHG has been achieved in 70% and 65% deuterated KD*P crystal at the temperature of 17.7°C and 29.3°C, respectively. The angular acceptance of 70% and 65% deuterated KD*P crystals fixed at their NCPM temperature were measured, which were 53 and 55 mrad, respectively. The application of the NCPM FHG in a high-power laser facility for inertial confinement fusion is also discussed. Based on the theoretical analysis, the NCPM KD*P can be placed after the focus lens; thus, the laser-induced damage of a fused-silica lens at ultraviolet can be avoided.
authors.forename: Xiuqing
authors.initials: X
authors.lastname: Jiang
authors.forename: Lailin
authors.initials: L
authors.lastname: Ji
authors.forename: Dong
authors.initials: D
authors.lastname: Liu
authors.forename: Shunxing
authors.initials: S
authors.lastname: Tang
authors.forename: Baoqiang
authors.initials: B
authors.lastname: Zhu
authors.forename: Zunqi
authors.initials: Z
authors.lastname: Lin