Abstract
The saturable absorbers (Cr<sup>4+</sup>:YAG, GaAs and LiF crystals for 1064-nm wavelength, V<sup>3+</sup>:YAG crystals for 1340-nm respectively) were examined as passive Mode Lockers and Q-switches in diode pumped Nd:YVO<sub>4</sub> lasers in the Z-type resonators. In each case, partially modulated long trains of QML pulses were observed. As a rule, envelopes with about 1 μs duration and more than 50% depth of modulation were observed. For stabilization of the mode locking trains nonlinear crystals (KTP or LBO) as negative feedback elements were inserted. The fully modulated QML trains for intracavity II harmonic conversion at 670-nm wavelength in V<sup>3+</sup>:YAG Q-switched Nd:YVO<sub>4</sub> laser with LBO crystal were demonstrated.
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