中文摘要：

在808am光纤耦合输出的LD激励下，Nd：KGW辐射出很强的橙黄光，测量了上转换荧光谱，其峰值出现在657，631，610，596，540nm处。分析了其产生的可能跃迁过程，讨论了上转换过程对Nd离子红外激光振荡的影响和上转换激光应用的可行性，并与Nd：YLF的上转换光谱进行对比研究。研究表明，对高掺杂Nd：KGW晶体在高功率抽运下会发生光子雪崩过程，Nd离子在两种材料中均出现黄绿波段的上转换荧光，其上转换激光较难实现。

英文摘要：

Upconversion of rare-earth ions has been paid more attention because of its application in visible laser and display area. Nd： KGW radiated yellow-orange luminescence under excitation of 808 nm diode laser, and the upconversion spectrum was measured. The upconversion emission peak wavelengths are at 657,631, 610, 596 and 540 nm. We analyzed the mechanism, and discussed the effect of upconversion on the infrared laser of Nd ions. The feasibility of Nd upconversion laser is also discussed. For comparison, the upconversion emission spectrum of Nd： YLF was also measured. The results indicated that the photon avalanche process was happened when high-doped Nd： KGW was excited by high power nescence happened in the two materials doped with Nd ions. It＇s 808 mn LD,and yellow-green upconversion lumidifficult to generate upconversion laser of Nd.