Abstract Whispering gallery mode (WGM) microcavities have a small mode volume, a high quality (Q) factor and great application potential in the field of integrated optics. The coupling of light into microcavities has attracted wide attention in the development of optical filters, sensors, and low-threshold lasers. WGM microcavities based on different coupling methods have promising applications for lasing and high-precision sensing. In a WGM coupling system, the coupling method determines the coupling efficiency, Q factor and sensor integration and even helps to determine the WGMs that are excited in the microcavity. This paper briefly reviews the coupling methods used for WGMs, summarizes their characteristics, and introduces the coupling methods of recent advances in the field, all of which are instructive for improving the coupling methods in the future.

中文翻译：

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回音壁模式谐振器系统中用于传感的耦合方法概述

摘要 回音廊模式（WGM）微腔具有模体积小、品质（Q）因数高的特点，在集成光学领域具有巨大的应用潜力。光耦合进入微腔在光学滤波器、传感器和低阈值激光器的发展中引起了广泛关注。基于不同耦合方法的 WGM 微腔在激光和高精度传感方面具有广阔的应用前景。在 WGM 耦合系统中，耦合方法决定了耦合效率、Q 因子和传感器集成度，甚至有助于确定在微腔中激发的 WGM。本文简要回顾了用于 WGM 的耦合方法，总结了它们的特点，并介绍了该领域最新进展的耦合方法，