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Shuangquan Fang 《Optik》2006,117(2):72-76
Mg, Fe double-doped LiTaO3 and LiNbO3 crystals have been grown by Czochralski method. The optical properties were measured by two-beam coupling experiments and transmitted facula distortion method. The results showed that the photorefractive response speed of Mg:Fe:LiTaO3 was about three times faster than that of Fe:LiTaO3, whereas the photo-damage resistance was two orders of magnitude higher than that of Fe:LiTaO3. In this paper, site occupation mechanism of impurities was also discussed to explain the high photo-damage resistance and fast response speed in Mg:Fe:LiTaO3 crystal. 相似文献
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We investigate the relative photo-damage effects during one- and two-photon excitations and demonstrate that there exist fundamental
differences in the damage induced by a high repetition rate laser as compared to that of a CW laser. This difference is evident
from the degree of enhanced fluorescence intensity achieved by blanking the excitation with an optical chopper. Such an enhancement
in fluorescence intensity provides better signal-to-noise ratio that could have immediate applications in multiphoton imaging
of live specimens. 相似文献
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