Opt Lett. 2018 Jun 1;43(11):2486-2489. doi: 10.1364/OL.43.002486.
We investigate the dynamics of a driven optical parametric oscillator under the injection of orbital angular momentum. The injected mode is adiabatically driven through arbitrary transformations on the Poincaré sphere of first-order paraxial beams. As a result, the down-converted beam conjugated to the seed is shown to follow a path imposed by a nontrivial symmetry on the Poincaré sphere. This symmetry allows controllable distinguishability between the spatial modes of the down-converted beams. In this Letter, we provide convincing experimental evidence of this effect.
我们研究了在注入轨道角动量的情况下受激光学参量振荡器的动力学。注入模式通过一阶傍轴光束的庞加莱球上的任意变换进行绝热驱动。结果表明，与种子共轭的下转换光束遵循庞加莱球上非平凡对称所施加的路径。这种对称性允许对下转换光束的空间模式进行可控区分。在这封信件中，我们提供了这一效应的令人信服的实验证据。
