Laboratoire Charles Fabry, Institut d'Optique, CNRS, Univ Paris-Sud, Palaiseau, France.
Opt Lett. 2013 Mar 15;38(6):938-40. doi: 10.1364/OL.38.000938.
We demonstrated laser operation of a passively Q-switched diode-pumped Er:YAG solid-state laser emitting at 1645 or 1617 nm depending on the initial transmission of the Cr:ZnSe saturable absorber. The crystal emitted up to 10 W at 1645 nm and up to 8 W at 1617 nm in CW mode while pumped with 65 W of incident pump power at 1533 nm. In passive Q-switched mode with 40 W of incident power, a Cr:ZnSe saturable absorber with initial transmission of 85% led to 330 μJ pulse energy, 61 ns pulse duration at a repetition rate of 1460 Hz at 1645 nm. An 80% initial transmission Cr:ZnSe sample led to 510 μJ energy pulses, 41 ns pulse duration at a repetition rate of 820 Hz with a central wavelength change from 1645 to 1617 nm. This is the first reported passively Q-switched diode-pumped Er:YAG laser operating on the (4)I(13/2)→(4)I(15/2) transition.
我们演示了一种被动调 Q 的二极管泵浦 Er:YAG 固态激光器的激光运转，其输出波长取决于 Cr:ZnSe 可饱和吸收体的初始透过率，可以在 1645nm 或 1617nm 处工作。当用 1533nm 的 65W 入射泵浦功率连续泵浦时，晶体在 1645nm 处最大输出 10W，在 1617nm 处最大输出 8W。在 40W 入射功率的被动调 Q 模式下，初始透过率为 85%的 Cr:ZnSe 可饱和吸收体在 1645nm 处产生 330μJ 脉冲能量、61ns 脉冲持续时间，重复频率为 1460Hz。初始透过率为 80%的 Cr:ZnSe 样品在重复频率为 820Hz 时产生 510μJ 能量脉冲，脉冲持续时间为 41ns，中心波长从 1645nm 变为 1617nm。这是首次报道基于 (4)I(13/2)→(4)I(15/2) 跃迁的被动调 Q 的二极管泵浦 Er:YAG 激光器。
