Observation of Time-transient spectral narrowing at 309 nm in Ce3+ doped SrF2 crystal
Observation of Time-transient spectral narrowing at 309 nm in Ce3+ doped SrF2 crystal
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DOI：
10.1016/s0030-4018(02)01375-5
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发表时间：
2002-05-01
影响因子：
2.4
通讯作者：
Makhov, VN
中科院分区：
文献类型：
--
作者：
Khaidukov, NM;Lam, SK;Makhov, VN
在掺Ce ~（3+）的SrF_2晶体中，观察到了5d-4f跃迁在309 nm处的瞬态谱窄化现象。测量了Ce ~（3+）：SrF_2晶体从真空紫外到可见光的透射光谱和激发光谱。晶体由KrF激光器以20 ns脉冲持续时间光学激发。使用时间分辨光谱检测光谱变窄。对于30 ns的优化延迟时间（激发KrF激光脉冲的开始和阵列检测器的开始之间的时间），309 nm峰的半高全宽处的线宽从近似11 nm（1130 cm（-1））变窄到近似7 nm（730 cm（-1））。当延迟时间大于50 ns时，线宽恢复到全宽。使用具有高反射率镜和石英平板的谐振腔不会导致激光振荡，这可能是由于Ce 3+离子的激发态吸收。(C)2002 Elsevier Science B. V.保留所有权利。
We observed time-transient spectral narrowing at 309 nm from the 5d-4f transition in Ce3+ ions doped into SrF2 crystal. The transmission and excitation spectra from the vacuum ultra-violet (VUV) to the visible were obtained for the Ce3+:SrF2 crystal. The crystal was optically excited by a KrF laser with 20 ns pulse duration. Spectral narrowing was detected using time-resolved spectroscopy. The linewidth at full-width-half-maximum for the 309 nm peak narrowed from similar to11 nm (1130 cm(-1)) to similar to7 nm (730 cm(-1)) for an optimized delay time of 30 ns (time between the onset of the excitation KrF laser pulse and the onset of the array detector). The linewidth regained its full width when the delay time was greater than 50 ns. The use of resonator cavity with a high reflectivity mirror and a quartz flat did not lead to laser oscillation probably due to excited state absorption by the Ce3+ ions. (C) 2002 Elsevier Science B.V. All rights reserved.