空间非均匀增益激光模式的产生
Creation of New Lasing Modes with Spatially Nonuniform Gain
摘要：
我们报告的创建新的激光模式与空间非均匀分布的光学增益在一维随机结构。数值计算表明，即使在没有增益饱和和模式竞争的情况下，增益的空间非均匀性也会引起激光模式的剧烈而复杂的变化。新的模式出现的频率之间的激光模式与均匀增益。我们详细研究了一些新的激光模式，发现它们具有高的输出方向性。我们的研究结果表明，随机激光的性质可能会显着修改，而不改变底层结构。
英文摘要：
We report on the creation of new lasing modes with spatially nonuniform distributions of optical gain in a one-dimensional random structure. It is demonstrated numerically that even without gain saturation and mode competition, the spatial nonuniformity of gain can cause dramatic and complicated changes of lasing modes. New modes appear with frequencies in between those of the lasing modes with uniform gain. We examine some new lasing modes in detail and find they exhibit high output directionality. Our results show that the random lasing properties may be modified significantly without changing the underlying structures.
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