半导体激光器在高速大正弦调制下的分频单一光脉冲化及单模化行为

本文用多纵模速率方程对半导体激光器在高速大正弦调制下的行为进行了数值分析,得出随着调制参量的变化激光器的输出光会出现有规则的光脉冲序列、光谱变宽和波长漂移;在适当的调制条件下不仅会产生二分频单一光脉冲化现象,而且还会产生更多分频单一光脉冲化现象,同时利用分频现象还能够得到单模化光脉冲,其脉冲宽度小于10ps,并且对这些现象进行了定性解释。

SUBHARMONIC SHORT LASER PULSE AND SINGLE MODE BEHAVIOR OF SEMICONDUCTOR LASERS UNDER IGH SPEED LARGE SINUSOIDAL ODULATION

The output characteristics of semiconductor lasers under high speed large sinusoidal modulation have been analyzed numerically by means of a system of multilongitudinal-mode rate equations. It is shown that with different modulation parameters, the output may contain a regular pulse series,exhibit spectral widening and spectral shift, and under some adequate modulation conditions, 2-or multi-subharmonic short laser pulse of less than 10 ps may appear, and may be of single mode. A qualitative interpretation is given to some of these phenomena.