Exploring the influence of high order transverse modes on the temporal dynamics in an optically pumped mode-locked semiconductor disk laser.
Exploring the influence of high order transverse modes on the temporal dynamics in an optically pumped mode-locked semiconductor disk laser.
复制标题
探索高阶横模对光泵锁模半导体盘激光器中时间动态的影响。
作者：
C. Tsou;H. C. Liang;C. Wen;K. Su;K. Huang;Y. Chen
我们定量研究了高阶横模对近半球形腔的光泵浦半导体激光器（OPSL）自锁模（SML）的影响。将物理孔径插入腔中以操纵高阶横模的激发。实验测量表明，激光器工作在良好的SML状态，存在TEM(0,0)模式和第一高阶横模。当更多的高阶横模被激发时，发现脉冲串被更多的横模拍频调制。当太多高阶横模被激发时，时间行为变成随机动力学。我们观察到，在没有高阶横模的情况下，时间轨迹表现出间歇性锁模状态。
We quantitatively investigate the influence of high-order transverse modes on the self-mode locking (SML) in an optically pumped semiconductor laser (OPSL) with a nearly hemispherical cavity. A physical aperture is inserted into the cavity to manipulate the excitation of high-order transverse modes. Experimental measurements reveal that the laser is operated in a well-behaved SML state with the existence of the TEM(0,0) mode and the first high-order transverse mode. While more high-order transverse modes are excited, it is found that the pulse train is modulated by more beating frequencies of transverse modes. The temporal behavior becomes the random dynamics when too many high-order transverse modes are excited. We observe that the temporal trace exhibits an intermittent mode-locked state in the absence of high-order transverse modes.