| 2种不同激光对钛宝石辐照作用的研究 |
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| 引用本文： | 蒋成勇,周国清,徐军,邓佩珍,干福熹. 2种不同激光对钛宝石辐照作用的研究[J]. 硅酸盐学报, 2003, 31(11): 1053-1057 |
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| 作者姓名： | 蒋成勇 周国清 徐军 邓佩珍 干福熹 |
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| 作者单位： | 中国科学院上海光学精密机械研究所,上海,201800 |
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| 摘 要： | 分别采用波长为193 nm的ArF准分子激光与波长为800 nm、脉冲宽度为120 fs的飞秒激光对温梯法生长的钛宝石进行辐照,并对辐照前后的吸收谱、荧光谱及电子顺磁共振(EPR)谱进行了检测。2种不同辐照的结果表明:218 nm及266 nm吸收峰并不是完全由同一种色心所引起的。通过对比不同品质因数(FOM)值的钛宝石样品在420 nm处的荧光谱,发现准分子激光辐照后420 nm处荧光强度降低,表明样品中Ti~(4 )离子浓度降低。而在飞秒激光辐照下荧光强度增大,即Ti~(4 )浓度增大。根据2种激光的波长,功率密度及辐照方式的差异对于2种辐照产生不同结果做出了解释。
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| 关 键 词： | 钛宝石 准分子激光 飞秒激光 吸收光谱 荧光光谱 电子顺磁共振谱 |
| 文章编号： | 0454-5648(2003)11-1053-05 |
| 修稿时间： | 2003-04-04 |
EFFECT OF IRRADIATION ON Ti-DOPED SAPPHIRE BY TWO DIFFERENT KINDS OF LASER |
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| JIANG Chengyong,ZHOU Guoqing,XU Jun,DEN Peizhen,GAN Fuxi. EFFECT OF IRRADIATION ON Ti-DOPED SAPPHIRE BY TWO DIFFERENT KINDS OF LASER[J]. Journal of The Chinese Ceramic Society, 2003, 31(11): 1053-1057 |
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| Authors: | JIANG Chengyong ZHOU Guoqing XU Jun DEN Peizhen GAN Fuxi |
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| Abstract: | Ti-doped sapphire crystals were separately irradiated by ArF excimer laser with wavelength of 193 nm and femtose-cond laser with the wavelength of 800 nm. The spectra of absorption, fluorescence and electron paramagnetic resonance (EPR) were measured. The results show that the absorption peaks at wavelength of 218nm and 266nm are not attributed to same F type color center. It is also found that between the different figure of merit for the crystals, the fluorescence intensity at wave-length of 420nm decreased after irradiate by excimer, it can be attributed to the Ti4 ions change to Ti3 , But during the femto-second laser irradiation, Ti3 ions are changed to Ti4 , and the fluorescence intensity increased. Explanations for different results in two irradiation methods were made according to laser wavelength, power density and irradiation methods. |
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| Keywords: | Ti-doped sapphires excimer laser femtosecond laser absorption spectrum fluorescence spectrum electron paramagnetic resonance spectrum |
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