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 the overlapping resonances of the coupled cavities have the lowest thresholds and lase first as previously suggested, leading to a manifestation of the typical Vernier effect now in an active system; these supermodes can also have increased thresholds and are hence suppressed, which can be viewed as an inverse Vernier effect. We attribute this effect to detuning-dependent Q-spoiling, and it can lead to an increased free spectrum range and possibly single-mode lasing, which may explain the experimental findings of several previous work. 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.

翻译：在本报告中,我们研究了由两个空洞组成的结合激光系统中的Vernier效应。我们表明,根据它们结合的性质,不仅在相互交织的孔的重叠共振中形成的“超级模式”能够达到最低阈值,而且如先前所建议的,首先拉长,从而在活跃系统中表现出典型的Vernier效应;这些超级模式也可以提高阈值,从而被抑制,这可以被视为反Vernier效应。我们把这种效应归因于调适依赖Q的吸附,这可以导致增加自由频谱范围,并可能形成单一模式拉长,这可以解释前几次工作的实验结果。我们用两个同时使用的微环孔和微环导孔,加上一个粘合的弧孔,来说明这种效应,我们讨论它与结合激光中存在的特殊点之间的关系。