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Cr4+:YAG as passive Q-switch and Brewster plate in a pulsed Nd:YAG laser

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3 Author(s)
Shimony, Y. ; Laser Dept., Nuclear Res. Center-Negev, Beer-Sheva, Israel ; Burshtein, Z. ; Kalisky, Y.

We demonstrate the performance of a Nd:YAG laser, passively Q-switched with a Cr4+:YAG plate, which plays the double role of a passive Q-switch and a Brewster plate. The Brewster plate configuration contributes an intracavity loss of approximately 3.2-10 -3 cm-1 along the cavity length. Losses contributed by the active Cr4+ ions in the plate relate to their excited state absorption. A freshly measured transmission saturation curve of Cr4+:YAG suggests a ground state absorption cross section σgs=(8.7±0.8)-10-19 cm2, and an excited state absorption cross section σes=(2.2±0.2)-10-19 cm2 of the Cr4+ ions at λ=1064 nm

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Quantum Electronics, IEEE Journal of  (Volume:31 ,  Issue: 10 )