摘要
测量了Ｎｄ：ＴＥＡＧ晶体光纤的吸收谱、荧光谱和荧光寿命。Ｎｄ：ＹＥＡＧ晶体的吸收谱是Ｎｄ：ＹＡＧ和Ｅｒ：ＹＡＧ的吸收谱的叠加，在０．８μｍ左右Ｎｄ３＋和Ｅｒ３＋的吸收线共存，所以Ｎｄ：ＹＥＡＧ可作双重波长（λ＝１．０６、２．９３μｍ）的激光晶体。Ｎｄ：ＹＥＡＧ晶体的荧光谱不是Ｎｄ：ＹＡＧ和Ｅｒ：ＹＡＧ荧光谱简单叠加，根据０．７９～０．９６μｍ范围内存在荧光连续带，Ｎｄ：ＹＥＡＧ晶体有可能用作调频激光晶体。Ｅｒ３＋和Ｎｄ３＋离子间交叉弛豫导致Ｎｄ３＋的λ＝１．０６μｍ荧光明显减弱，因此用Ｅｒ的掺入以改善Ｎｄ：ＹＡＯ的激光特性是不可能的。
The absorption spectra, fluorescence spectra and fluorescent life time of Nd:YEAG crystal are measured. The absorption spectra of Nd:YEAG are characterized by a simple combination of those of single doped Nd: YAG and Er:YAG. The absorption line of Er3+ and Nd3+ ions coexist at around 0. 8μm, consequently, it is conceivable that diode pumping of codoped Er and Nd laser may be possible and the Nd:YEAG may resulet in double wavelength laser crystal. According on the continuous flourescence spetrum existed in the 0. 79￣0. 96μm wavelength regions, it is possible that Nd:YEAG may be used as a tuning crustal. The Nd3+ state was quenched and lifetime of this state was reduced from the 240μs(for Nd:YAG) to 8μs(for Nd:YEAG), due to cross relaxation between Er3+ and Nd3+,so the laser performance of Nd:YAG are not improved by doping with Er3+.
基金
国家自然科学基金
关键词
光谱
掺杂
激光晶体
钕离子
optical spectrum
YEAG-crysta
doping-Nd￣(3+)
