What is Laser Threshold?
What is Laser Threshold?
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DOI：
10.1109/jstqe.2013.2259222
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发表时间：
2013-07-01
影响因子：
4.9
通讯作者：
Ning, C. Z.
中科院分区：
文献类型：
--
作者：
Ning, C. Z.
“什么是激光”的问题与什么是激光阈值问题密切相关。我们通过L-I曲线分析了激光阈值的可能定义，并得出结论：当自发辐射因子很大时，就像微纳激光器一样，没有一致的阈值定义。所有这些基于L-I曲线的定义都与抽运光输出统计性质的演化不一致。因此，我们认为，对于自发辐射进入激光模式的比例变得相当大的纳米激光器，必须放弃基于L-I曲线的阈值定义。
The question of "what is a laser" is closely related to that of what is laser threshold. We analyze possible definitions of laser threshold through the L-I curve and conclude that there is no consistent definition of a threshold when the spontaneous emission factor is large, as in the case of micro- and nano-lasers. All these definitions based on L-I curve are not consistent with the evolution of statistical properties of light output with pumping. Thus, we argue that the threshold definition based on L-I curve has to be abandoned for nanolasers, where the fraction of spontaneous emission into a lasing mode becomes quite large.