摘要
本文给出光函数熵的定义 ,用数值模拟了几种具体情况下光的熵。结果表明 ,熵的方法确实能用于描述光传输过程 :熵对传输方向的变化率等于零时 ,光函数 (光脉冲或光束 )波形保持不变 ;熵变化率大于零时 ,光函数波形展宽 (发散 ) ;熵变化率小于零时 ,光函数波形压缩 (聚焦 )。用熵表征非线性光传输优于用脉 (束 )宽、二阶矩表征。
In this paper, the entropy in quantum mechanics is introduced to represent nonlinear propagation of light in the framework of the Schroedinger formulation of light propagation. Our numerical calculation show that the entropy and its differentiation with respect to the propagation direction can describe the compression and broadening of light pulse(or the focusing and diffussion of light beam), which is better than pulse(beam) width and second-order moments.
出处
《激光杂志》
CAS
CSCD
北大核心
2001年第4期32-33,共2页
Laser Journal
关键词
非线性光传输
熵
数字模拟解
光函数
nonlinear propagation, entropy, beam width,pulse width,second-order moments
