title: Efficient eye-safe neodymium doped composite yttrium gallium garnet crystal laser.
abstract: We report a laser-diode pumped continuous-wave (cw) and passively Q-switched eye-safe laser at about 1.42 μm with the neodymium-doped yttrium gallium garnet (Nd:YGG) crystal for the first time to our knowledge. The composite Nd:YGG crystal was developed originally. A systematic comparison of laser performance between the homogeneously doped and composite Nd:YGG crystal was made, which showed that the composite Nd:YGG manifested less thermally induced effects. Cw output power of 2.06 W was obtained with the slope efficiency of 20.7%. With a V:YAG as a saturable absorber, the passive Q-switching at 1.42 μm was gotten with the pulse width, pulse energy, and peak power of 34 ns, 46.7 μJ, and 1.4 kW, respectively. The present work should provide a potential candidate for the generation of eye-safe lasers.
authors.forename: Haohai
authors.initials: H
authors.lastname: Yu
authors.forename: Shuxian
authors.initials: S
authors.lastname: Wang
authors.forename: Shuo
authors.initials: S
authors.lastname: Han
authors.forename: Kui
authors.initials: K
authors.lastname: Wu
authors.forename: Liangbi
authors.initials: L
authors.lastname: Su
authors.forename: Huaijin
authors.initials: H
authors.lastname: Zhang
authors.forename: Zhengping
authors.initials: Z
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Jiyang
authors.initials: J
authors.lastname: Wang
mesh_terms: D000818:Animals; D003460:Crystallization; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005126:Eye Burns / Q000209:etiology* / Q000517:prevention & control*; D005131:Eye Injuries / Q000209:etiology* / Q000517:prevention & control*; D006801:Humans; D053844:Lasers, Solid-State / Q000009:adverse effects*