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The polarization states of passively Q-switched microchip lasers were investigated by adopting different combinations of Yb:YAG, Cr,Ca:YAG crystals and ceramics. The results show that except for the random polarization oscillation of Yb:YAG/Cr,Ca:YAG all-ceramics combination, other three combinations including crystals exhibit linearly polarization. Highly efficient, nearly diffraction-limited beam...
Optical properties of Yb:Y3Sc2Al3O12 crystal were investigated and compared with those from Yb:YAG crystals. Laser-diode pumped continuous-wave and passively Q-switched Yb:Y3Sc2Al3O12 lasers with Cr4+:YAG crystal as saturable absorber has been demonstrated for the first time.
In this paper a LD end-pumped Nd:YAG ceramic microchip laser passively Q-switched by Cr4+:YAG absorber is demonstrated to generate axisymmetrically polarized pulse. The reason to employ the end-pumped microchip laser lies in the fact that such cavity configuration is beneficial carrier both for producing energetic Q-switched pulse and also the axisymmetrical polarization. The Cr4+:YAG crystal absorber...
Composite Yb:YAG/Cr:YAG ceramics was fabricated successfully by using vacuum sintering technique and nanocrystalline technology. Self-Q-switched lasers with pulse energy of 125 ??J, and peak power of 105 kW have been demonstrated for the first time.
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