结合光束传输的薛定谔形式理论,基于量子机制的信息熵被用来描述非线性光传输.理论推导和数值模拟结果表明:信息熵及其对光传输方向的变化率可以表征光脉冲的压缩或展宽或光束的聚焦与发散.用信息熵表征非线性光传输优于用脉(束)宽、二阶矩表征.

The information entropy in quantum mechanics is introduced to represent nonlinear propagation of light within the framework of the Schroedinger formulation of light propagation. Our analytical derivation and numerical calculation show that the information 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 the description with pulse (beam) width and second order moments.