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摘要:
Thermal depolarization caused by birefringence is a major factor that limits the output power of linearly polarized Nd:YAG laser. Compared with conventional [111]- cut Nd:YAG rod, the thermal depolarization depends on the polarization direction for the [100]- cut Nd:YAG rod. The linearly polarized output power can be improved by suitable modification of the polarization direction of oscillate laser. The [111]- and [100]- cut Nd:YAG rods are used as the gain medium and the Cr4+:YAG crystal is used as the saturable absorber for passively Q-switched laser. The experiment demonstrates that in comparison with conventional [111]- cut Nd:YAG rod, highly stabled output with high extinction is achieved by using the [100]- cut Nd:YAG rod as the laser crystal. The extinction ratio is 500:1 and polarized output stability is higher than 96.5%.
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来源 :
Acta Optica Sinica
ISSN: 0253-2239
年份: 2014
卷: 34