激光的产生与热力学

Generation of Laser and Thermodynamics

从非平衡态热力学角度讨论了激光产生的基本原理，其中还解释了所谓负温度意味着非平衡态熵减少，系统趋向有序。

The paper discusses the fundamentals of laser generation from the angle of nonequi- librium thermodynamics and also explains that the so- called negative temperature means the decrease of entropy in nonequilibrium, so that system tends to be ordery.