Asymmetrical laser-resonator having solid-state gain-medium symmetrically filled by resonator-mode
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United States of America Patent
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Aug 28, 2001
Grant Date -
N/A
app pub date -
Aug 11, 1999
filing date -
Aug 11, 1999
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Abstract
A laser includes an asymmetrical laser-resonator formed between a concave maximally-reflecting mirror and a plane output-coupling mirror. The laser-resonator includes a transversely optically-pumped gain-medium rod asymmetrically located in the laser-resonator closer to the output-coupling mirror than to the maximally-reflecting mirror. Components of the laser-resonator are configured, dependent upon the thermal-lensing coefficient of the gain-medium and optical pumping power, such that the laser-resonator operates as a stable resonator generating a multimode circulating laser-beam. The beam has a width at the maximally-reflecting mirror greater than its width at the output-coupling mirror for reducing laser-damage to the maximally-reflecting mirror. The beam symmetrically fills the gain-medium thereby providing optimum laser-energy extraction from the gain-medium.
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