Generating controllable Laguerre-Gaussian laser modes through intracavity spin-orbital angular momentum conversion of light

摘要: The rapid developments in orbital-angular-momentum-carrying Laguerre-Gaussian (LG0 l) modes recent years have facilitated progresses optical communication, micromanipulation and quantum information. However, it is still challenging to efficiently generate bright, pure selectable LG0 l laser compact devices. Here, we demonstrate a low-threshold solid-state that can directly output selected high-purity with high efficiency controllability. Spin-orbital angular momentum conversion of light used reversibly convert the transverse inside cavity determine mode index. generated 1 2 purities ~97% ~93% slope efficiencies ~11% ~5.1%, respectively. Moreover, our design be easily extended produce higher-order cylindrical vector beams. Such configuration features flexible control, low threshold, robustness, making practical tool for applications super-resolution imaging, high-precision interferometer correlations.