• Technical Conference: 

    09 – 14 May 2021

  • Exhibition: 

    10 – 14 May 2021

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STh1B

Structured Light Sources

Presider: Shang-da Yang, National Tsing Hua University

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Presentations

Classically Entangled Vectorial Structured Light Towards Multiple Degrees of Freedom and Higher Dimensions (STh1B.1)
Presenter: Yijie Shen, University of Southampton

Vector beam with spin-orbital non-separable coupling acts as classically entangled state with two degrees of freedom, here we generalize the ray-wave structured vectorially structured light to create multi-degree-of-freedom control towards high-dimensional classical entanglement.

Authors:Yijie Shen, University of Southampton / Zhaoyang Wang, Tsinghua University / Xilin Yang, University of California / Isaac Nape, University of the Witwatersrand / Darryl Naidoo, CSIR National Laser Centre / Xing Fu, Tsinghua University / Andrew Forbes, University of the Witwatersrand

  Paper

Direct Generation of Vortex Lattice Modes From an Intracavity Frequency Doubled Pr:YLF Laser (STh1B.2)
Presenter: Srinivasa Rao Allam, Chiba Univeristy

We report on, for the first time, the direct generation of visible (640 nm) and ultraviolet (320 nm) optical vortex lattice modes from the frequency doubled diode-pumped Pr3+:YLF laser.

Authors:Srinivasa Rao Allam, Chiba Univeristy / Katsuhiko Miyamoto, Chiba Univeristy / Takashige Omatsu, Chiba Univeristy

  Paper

High-Purity Orbital Angular Momentum States From a Visible Metasurface Laser (STh1B.3)
Presenter: Andrew Forbes, University of the Witwatersrand

We demonstrate the selection of twisted light carrying Orbital Angular Momentum (OAM) of l = 100 with an 88% purity by arbitrary spin-to-orbit coupling inside a visible solid-state laser with a metasurface device.

Authors:Darryl Naidoo, CSIR - NLC / Hend Sroor, University of the Witwatersrand / Yao-Wei Huang, Harvard University / Bereneice Sephton, University of the Witwatersrand / Adam Vallés, University of the Witwatersrand / Vincent Ginis, Harvard University / Qiwen Zhan, University of Shanghai / Cheng-Wei Qiu, National University of Singapore / Antonio Ambrosio, Harvard University / Federico Capasso, Harvard University / Andrew Forbes, University of the Witwatersrand

  Paper

Intracavity-Mode-COnversion Structured-Light Laser (STh1B.4)
Presenter: Jing Pan, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction

The astigmatic mode converter is exploited as an intracavity element to establish a structured-light laser scheme, realizing free control of two-dimensional indices of laser modes and large-range tunability of radial- and orbital-angular-momenta (p-to-4\hbar and \ell-to-±15\hbar).

Authors:Jing Pan, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction / Yijie Shen, University of Southampton / wang hao, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction / Zhaoyang Wang, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction / Zhensong Wan, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction / Xing Fu, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction / Hengkang Zhang, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction / Qiang Liu, Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Eduction

  Paper

Multi-Dimension Control on Complex Perfect Vortex Array (STh1B.5)
Presenter: wang hao, Beijing Institute of Technology

A scheme is proposed to generate perfect vortex (PV) array with multi-tunable dimensions including multi-ring, topological charge, eccentricity, size and element number. The “Bear PV” along with assorted arrays are constructed to solidify foregoing theory.

Authors:wang hao, Beijing Institute of Technology / Shiyao Fu, Beijing Institute of Technology / Chunqing Gao, Beijing Institute of Technology

  Paper

Experimental Validation of Free-Space Coherent Beam Combining Simulations for Filled Aperture Configuration (STh1B.6)
Presenter: Awakash Dixit, Indian Institute of Technology Madras

A theoretical model for filled aperture coherent beam combining has been developed and the simulation results are validated through coherent beam combination of two 100 W laser beams using a diffractive optical element.

Authors:Awakash Dixit, Indian Institute of Technology Madras / M. S. Sooraj, Indian Institute of Technology Madras / C. Linslal, Indian Institute of Technology Madras / A. Padmanabhan, Indian Institute of Technology Madras / D. Venkitesh, Indian Institute of Technology Madras / Balaji Srinivasan, Indian Institute of Technology Madras

  Paper

Towards Real-Time Adaptable Machine Learning-Based Photoinjector Shaping (STh1B.7)
Presenter: Jack Hirschman, Stanford University

Hardware-based machine learning for photoinjector manipulation is a promising solution for real-time adaptive electron-beam manipulation. We present preliminary studies towards this goal including simulations of the optical system and early machine learning results.

Authors:Jack Hirschman, Stanford University / Randy Lemons, SLAC National Accelerator Laboratory / Ryan Coffee, SLAC National Accelerator Laboratory / Federico Belli, Heriot-Watt University / Sergio Carbajo, SLAC National Accelerator Laboratory

  Paper