Frequency conversion of orbital angular momentum with optimized efficiency and modal purity

IF 1.8 4区 物理与天体物理 Q3 OPTICS
SACHLEEN SINGH, Bereneice Sephton, Imogen Morland, Mitchell Cox, Jonathan Leach, Andrew Forbes, Wagner Buono
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引用次数: 0

Abstract

The use of nonlinear optics for the creation, control, and detection of structured light has gained prominence of late, but it is plagued by low efficiency and variable modal purity. Here, we show how to optimize the efficiency and modal purity in the nonlinear conversion of structured light modes. Using difference frequency generation of orbital angular momentum carrying Laguerre–Gaussian modes as an example, we achieved more than a 40% rise in efficiency while maintaining the modal purity above 90% compared to conventional methods. To demonstrate the versatility of our approach, we show the frequency conversion of perfect vortex beams up to ℓ =40 in a topological charge, achieving a new state of the art. We believe this theoretical treatment will facilitate our work’s translation to other modal forms and nonlinear processes.
优化效率和模态纯度的轨道角动量频率转换
近年来,非线性光学在结构光的产生、控制和检测方面的应用得到了突出的发展,但它一直受到效率低和模态纯度多变的困扰。在这里,我们展示了如何优化结构光模式非线性转换的效率和模态纯度。以携带拉盖尔-高斯模式的轨道角动量的差频产生为例,与传统方法相比,我们实现了40%以上的效率提高,同时保持了90%以上的模态纯度。为了证明我们方法的多功能性,我们展示了在拓扑电荷中高达40的完美涡旋光束的频率转换,实现了新的技术水平。我们相信这种理论处理将有助于我们的工作翻译成其他模态和非线性过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.00
自引率
5.30%
发文量
374
审稿时长
2.1 months
期刊介绍: The Journal of the Optical Society of America B (JOSA B) is a general optics research journal that complements JOSA A. It emphasizes scientific research on the fundamentals of the interaction of light with matter such as quantum optics, nonlinear optics, and laser physics. Topics include: Advanced Instrumentation and Measurements Fiber Optics and Fiber Lasers Lasers and Other Light Sources from THz to XUV Light-Induced Phenomena Nonlinear and High Field Optics Optical Materials Optics Modes and Structured Light Optomechanics Metamaterials Nanomaterials Photonics and Semiconductor Optics Physical Optics Plasmonics Quantum Optics and Entanglement Quantum Key Distribution Spectroscopy and Atomic or Molecular Optics Superresolution and Advanced Imaging Surface Optics Ultrafast Optical Phenomena Wave Guiding and Optical Confinement JOSA B considers original research articles, feature issue contributions, invited reviews and tutorials, and comments on published articles.
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