Doubly Q-switched GdVO_(4)/Nd:GdVO_(4) laser with AO modulator and Cr~(4+):YAG saturable absorber under direct 879 nm diode pumping to the emitting level

摘要

In this letter, a doubly Q-switched 1.06 (mu)m pulse laser with AO modulator and Cr~(4+):YAG saturable absorber by direct pumping grown-together composite GdVO_(4)/Nd:GdVO_(4) crystal is demonstrated for the first time. Compared to purely AO Q-switching, the simultaneous use of AO Q-switch and Cr~(4+):YAG saturable absorber can generate shorter pulses and more symmetric temporal profiles. The thermal lens effect of laser crystal was analyzed.