2016年7月29日 · By exploiting the emerging non-Hermitian photonics design at an exceptional point, we demonstrate a microring laser producing a single-mode OAM vortex lasing with the ability to precisely define the topological charge of the OAM mode.

2024年4月16日 · OAM lasers come in all shapes and sizes, from bulky solid-state devices for high power, to microsized on-chip solutions for easy integration into electro-optical systems. Advanced quantum...

2019年10月2日 · Recently, high-power ultrashort OAM-tunable VBs were combined with femtosecond laser direct writing technology to process more special structures, such as multi-waveguide 266 and micro-pipe ...

2020年4月27日 · Here, we report a metasurface-enhanced laser that overcomes this limitation. We demonstrate new high-purity OAM states with quantum numbers reaching ℓ = 100 and non-symmetric vector vortex...

2024年7月23日 · 南京大学物理学院王慧田、汪喜林研究组在轨道角动量（Orbital Angular Momentum，简称OAM）激光器研制中取得重要进展。 提出了含一对共轭多螺旋相位全息镜和嵌入简并腔的嵌套环形腔结构设计策略，既规避了不同OAM模式间的随机竞争，又解决了OAM模式数量和手性的控制问题，成功实现了多模OAM梳数字激光器；进一步演示了腔内增强的OAM梳二次谐波产生。...

2025年2月26日 · Benefiting from the long gain region and the large surface-to-volume ratio of this fiber-like geometric structure, a 100 W optical vortex laser (OAM = ℏ) with a high slope efficiency of 66.0% is achieved at 2.1 µm, which is, to the best of our knowledge, the record power of the at-source OAM laser in the 2 µm spectral range and opens a new ...

2025年3月14日 · In this experimental setup, we generate high-dimensional OAM states using a He-Ne laser of wavelength 633 nm and a beam waist of 0.4 mm. We make the Gaussian beam go through a spatial filter and then magnify it using a 4f configuration with lenses of focal lengths 13.86 and 200 mm. The resulting beam is projected onto a Holoeye Pluto-2-NIR-011 SLM.

2025年1月28日 · Detecting orbital angular momentum (OAM) of vortex beams plays a vital role in unlocking their new capability. A multifoci metalens is developed to detect more OAM modes with the same number of light...

2024年7月1日 · We report on versatile orbital angular momentum beam generation through the association of a 61-channels coherent beam combining digital laser and a liquid-crystal q-plate. Particularly, high-order vortex beams that carry orbital angular momentum are generated with radial, azimuthal and/or circular polarization states.

2024年2月15日 · This paper proposes a novel approach that allows spatial mode-conversion-controlled laser oscillation in a high-gain OAM laser cavity with an integrated spiral-face output coupler (SFOC). By adapting position-dependent resonant modes, scalar optical vortices with a record power level (>60 W), high purity (>90%), and controllable OAM states ( ħ ...