YAP:Nd晶体激光跃迁截面的性质和在激光器中的一些新应用

计算了YAP:Nd晶体激光跃迁截面,任意椭圆偏振光的跃迁截面由三个参数确定。实验证实了计算的结果,并且用来得到波长可变的激光器。讨论了传输矩阵为U矩阵的两种激光器结构,计算了本征模式的偏振和频率,实验和理论基本符合。它们可以用来得到较大输出能量的单纵模激光器和激光器的新的调制方法。 关键词：

LASER TRANSITION CROSS SECTIONS OF YAP:Nd CRYSTALS AND SOME NEW APPLICATIONS IN LASERS

The laser transition cross sections of YAP:Nd crystals are calculated by using group theory. The values of these cross sections for general elliptically polarized light are shown to be determined by three parameters. The theoretical results are verified by experiments and demonstrated by the construction of a wave length variable laser. We analysed two laser structures in which the transmission matrices are U-matrices, and calculated the polarizations and frequencies of their eigenmodes. Experimental results agree with the theory well. The results obtained in our work can be used in construc-tion of a single longitudinal mode laser with enhance output and to suggest a new method of modulation for lasers.