论文标题
Janus光学参数振荡器的几代高效率，高纯度和宽带Laguerre-Gaussian模式
Generations of high efficiency, high purity, and broadband Laguerre-Gaussian modes from a Janus optical parametric oscillator
论文作者
论文摘要
Laguerre-Gaussian（LG）模式，具有轨道的光动量，对于重要的应用至关重要，例如高容量的光学通信，超分辨率成像和多维量子纠缠。这些应用程序中的高级开发需求可靠且可调的LG模式激光源，但是尚不存在。在这里，我们在实验上展示了来自Janus光学参数振荡器（OPO）的高效，高纯度，可触发和拓扑控制的LG模式。具有两面腔模式的Janus Opo旨在确保从高斯形基的基本抽水模式到所需的LG参数模式的有效演变。 The output LG mode has a tunable wavelength between 1.5 um and 1.6 um with a conversion efficiency above 15%, a topological charge switchable from -4 to 4, and a mode purity as high as 97%, which provides a high-performance solid-state light source for high-end demands in multi-dimensional multiplexing/demultiplexing, control of spin-orbital coupling between light and atoms, and so on.
Laguerre-Gaussian (LG) modes, carrying orbital angular momentum of light, are critical for important applications such as high-capacity optical communications, super-resolution imaging, and multi-dimensional quantum entanglement. Advanced developments in these applications strongly demand reliable and tunable LG mode laser sources, which, however, do not yet exist. Here, we experimentally demonstrate highly-efficient, highly-pure, broadly-tunable, and topological-charge-controllable LG modes from a Janus optical parametric oscillator (OPO). Janus OPO featuring two-face cavity mode is designed to guarantee an efficient evolution from a Gaussian-shaped fundamental pumping mode to a desired LG parametric mode. The output LG mode has a tunable wavelength between 1.5 um and 1.6 um with a conversion efficiency above 15%, a topological charge switchable from -4 to 4, and a mode purity as high as 97%, which provides a high-performance solid-state light source for high-end demands in multi-dimensional multiplexing/demultiplexing, control of spin-orbital coupling between light and atoms, and so on.
