title: High repetition rate dual-rod acousto-optics Q-switched composite Nd:YVO4 laser.
abstract: We demonstrate the high-repetition rate acousto-optic Q-switching of a dual-rod Nd:YVO4 laser. Two thermally bonded composite YVO4-Nd:YVO4-YVO4 rod crystals were used as the gain medium to reduce the serious thermal effect. The pump mode and its influence on the laser mode were analyzed, and the effective pump radius was controlled by tuning the spectrum of laser diodes with adjustment on the temperature of laser diodes. Three different configurations of cavity optics were designed and the output performance using these cavities was investigated. In Q-switching operation, 73.2 W TEM00 mode average power at 650 kHz was obtained. The stable Q-switching range was from 80 kHz to 650 kHz with the pulse duration increasing from 17.5 ns to 80 ns. In CW operation, 78 W TEM00 mode and 93 W multi-mode output power was achieved with different cavity designs, corresponding to the optical-optical efficiency of 46.5% and 52.2% respectively.
authors.affiliation: State Key Laboratory of Tribology, Center for Photonics and Electronics, Department of Precision Instruments, Tsinghua University, Beijing, China.
authors.forename: Xingpeng
authors.initials: X
authors.lastname: Yan
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Xing
authors.initials: X
authors.lastname: Fu
authors.forename: Hailong
authors.initials: H
authors.lastname: Chen
authors.forename: Mali
authors.initials: M
authors.lastname: Gong
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Wang
mesh_terms: D000162:Acoustics; D004867:Equipment Design; D053844:Lasers, Solid-State; D015233:Models, Statistical; D009354:Neodymium; D055095:Optics and Photonics; D009991:Oscillometry / Q000379:methods; D013696:Temperature; D013997:Time Factors; D014639:Vanadium / Q000737:chemistry; D015019:Yttrium / Q000737:chemistry
chemical_list: D014639:Vanadium; D009354:Neodymium; D015019:Yttrium