光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2010年
4期
883-886
,共4页
董力强%黄世华%温红宇%冯颖%段晓霞
董力彊%黃世華%溫紅宇%馮穎%段曉霞
동력강%황세화%온홍우%풍영%단효하
上转换%激发过程%Er~(3+)%方波激发
上轉換%激髮過程%Er~(3+)%方波激髮
상전환%격발과정%Er~(3+)%방파격발
Upconversion%Excitation process%Er~(3+)%Square wave excitation
用方波电源驱动808 nm激光二极管(LD)激发Er~(3+)掺杂的亚碲酸盐氟氧化物玻璃,测量~4F_(9/2)能级上转换发光的上升和衰减,根据上升的时间常数确定中间能级的寿命,从而确定~4F_(9/2)能级粒子数积累的过程.通过建立速率方程模型分析~4F_(9/2)能级的上升和衰减特性与中间能级的关系,确定808 nm LD激发下上转换红光的激发机理,同时提供了一种通过上转换发光,用光电倍增管测量红外能级寿命的方法.
用方波電源驅動808 nm激光二極管(LD)激髮Er~(3+)摻雜的亞碲痠鹽氟氧化物玻璃,測量~4F_(9/2)能級上轉換髮光的上升和衰減,根據上升的時間常數確定中間能級的壽命,從而確定~4F_(9/2)能級粒子數積纍的過程.通過建立速率方程模型分析~4F_(9/2)能級的上升和衰減特性與中間能級的關繫,確定808 nm LD激髮下上轉換紅光的激髮機理,同時提供瞭一種通過上轉換髮光,用光電倍增管測量紅外能級壽命的方法.
용방파전원구동808 nm격광이겁관(LD)격발Er~(3+)참잡적아제산염불양화물파리,측량~4F_(9/2)능급상전환발광적상승화쇠감,근거상승적시간상수학정중간능급적수명,종이학정~4F_(9/2)능급입자수적루적과정.통과건립속솔방정모형분석~4F_(9/2)능급적상승화쇠감특성여중간능급적관계,학정808 nm LD격발하상전환홍광적격발궤리,동시제공료일충통과상전환발광,용광전배증관측량홍외능급수명적방법.
The rise and decay curves of Er~(3+4)F_(9/2) upconversion emission in oxyfluoride tellurite glass were measured under the excitation at 808 nm from a laser diode driven by square waves. The lifetime of the intermediate state could be determined via rise times. Then the accumulation process of the ~4F_(9/2) population was confirmed. The excitation mechanism of up-conversion red e-mission under 808 nm excitation was confirmed by the rate equations and analyzing the relationship between the time constants of the rise and decay processes and the intermediate state. Square wave excited upconversion emission may also be used for measur-ing lifetimes of infrared energy levels with a conventional photomultiplier tube.
