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arXiv 0910.5285physics.optics
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空间非均匀增益对弱散射随机系统激光模的影响

Effects of Spatially Nonuniform Gain on Lasing Modes in Weakly Scattering Random Systems

Jonathan Andreasen, Christian Vanneste, Li Ge, Hui Cao

摘要:

本文研究了一维随机系统中光增益的非均匀分布效应。数值计算表明,即使没有增益饱和和模式竞争,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。激光模式分解的准模式的被动系统来监测的变化。随着增益分布从均匀逐渐变化到非均匀,模式混合量增加。此外,我们研究了由非均匀增益分布产生的新的激光模式。我们发现,新的激光模式可能会与现有的激光模式一起消失,从而导致激光态的局域密度的波动。

英文摘要:

A study on the effects of optical gain nonuniformly distributed in one-dimensional random systems is presented. It is demonstrated numerically that even without gain saturation and mode competition, the spatial nonuniformity of gain can cause dramatic and complicated changes to lasing modes. Lasing modes are decomposed in terms of the quasi modes of the passive system to monitor the changes. As the gain distribution changes gradually from uniform to nonuniform, the amount of mode mixing increases. Furthermore, we investigate new lasing modes created by nonuniform gain distributions. We find that new lasing modes may disappear together with existing lasing modes, thereby causing fluctuations in the local density of lasing states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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