Inverse Vernier effect in coupled lasers
Inverse Vernier effect in coupled lasers
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DOI：
10.1103/physreva.92.013840
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发表时间：
2015-07-23
影响因子：
2.9
通讯作者：
Tuereci, Hakan E.
中科院分区：
文献类型：
--
作者：
Ge, Li;Tuereci, Hakan E.
本文研究了双腔耦合激光系统中的游标效应。我们表明，根据其耦合的性质，不仅可以在重叠的共振这两个腔形成的“超模”具有最低的阈值，如前所述，导致在这些重叠的共振和典型的游标效应的表现激射，但他们也可以有增加的阈值，因此被抑制，这可以被看作是一个逆游标效应。逆游标效应也可以导致自由光谱范围的增加和可能的单模激光，这可以解释在几个以前的研究中的实验结果。我们使用两个耦合的微环腔和一个微环腔耦合到一个板条腔来说明这种效应，并讨论了它与耦合激光器中例外点的存在的关系。
In this report we study the Vernier effect in coupled laser systems consisting of two cavities. We show that depending on the nature of their coupling, not only can the "supermodes" formed at overlapping resonances of these two cavities have the lowest thresholds as previously found, leading to lasing at these overlapping resonances and a manifestation of the typical Vernier effect, but also they can have increased thresholds and are hence suppressed, which can be viewed as an inverse Vernier effect. The inverse Vernier effect can also lead to an increased free spectrum range and possibly single-mode lasing, which may explain the experimental findings in several previous studies. We illustrate this effect using two coupled micro-ring cavities and a micro-ring cavity coupled to a slab cavity, and we discuss its relation to the existence of exceptional points in coupled lasers.