Q-switched laser device
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United States of America Patent
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Dec 1, 2015
Grant Date -
Apr 30, 2015
app pub date -
Oct 24, 2014
filing date -
Oct 25, 2013
priority date (Note) -
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Abstract
When an excitation light is entered in a laser medium including a doped (containing rare earth element) YAG, the vicinity of the excitation light entry face is locally heated which generates a birefringence, causing degradation of linear polarization of emitted laser. To avoid such a phenomenon, it was necessary to make the excitation light pulsed and slow down the repetition rate of the pulse. In this device, an undoped YAG is bonded to a excitation light entry face of the laser medium made of a doped YAG. By arranging the YAG <100> axis so as to extend along the optical axis of the laser oscillation system, a linearly polarized pulse laser can be obtained.
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