Single-mode characteristic of a supermode microcavity Raman laser

Significance Microlasers in near-degenerate supermodes play a pivotal role for studies of non-Hermitian physics, novel light sources, and advanced sensors. However, the widely observed beating phenomena single-mode nature stimulated scattering have been generating lasing characteristic dilemma. In this article, we experimentally elucidate spectral paradox by investigating dynamics supermode Raman microlasers. The behavior is confirmed, signal has recognized as transient interference during switching between with help self-injection technique. This work provides an insightful guidance microlaser-based precision measurements paves way to reconfigurable sources.