• PhotoniX
  • Vol. 4, Issue 1, 9 (2023)
Hao Wang1、†, Ziyu Zhan1、†, Futai Hu1, Yuan Meng1, Zeqi Liu1, Xing Fu1、2、*, and Qiang Liu1、2、**
Author Affiliations
  • 1State Key Laboratory of Precision Measurement of Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  • 2Key Laboratory of Photonic Control Technology, Ministry of Education, Beijing 100084, China
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    DOI: 10.1186/s43074-022-00079-9 Cite this Article
    Hao Wang, Ziyu Zhan, Futai Hu, Yuan Meng, Zeqi Liu, Xing Fu, Qiang Liu. Intelligent optoelectronic processor for orbital angular momentum spectrum measurement[J]. PhotoniX, 2023, 4(1): 9 Copy Citation Text show less

    Abstract

    Orbital angular momentum (OAM) detection underpins almost all aspects of vortex beams’ advances such as communication and quantum analogy. Conventional schemes are frustrated by low speed, complicated system, limited detection range. Here, we devise an intelligent processor composed of photonic and electronic neurons for OAM spectrum measurement in a fast, accurate and direct manner. Specifically, optical layers extract invisible topological charge information from incoming light and a shallow electronic layer predicts the exact spectrum. The integration of optical-computing promises us a compact single-shot system with high speed and energy efficiency (optical operations / electronic operations ~ $${10}^{3}$$ ), neither necessitating reference wave nor repetitive steps. Importantly, our processor is endowed with salient generalization ability and robustness against diverse structured light and adverse effects (mean squared error ~ $$10^{(-5)}$$ ). We further raise a universal model interpretation paradigm to reveal the underlying physical mechanisms in the hybrid processor, as distinct from conventional ‘black-box’ networks. Such interpretation algorithm can improve the detection efficiency up to 25-fold. We also complete the theory of optoelectronic network enabling its efficient training. This work not only contributes to the explorations on OAM physics and applications, and also broadly inspires the advanced links between intelligent computing and physical effects.
    Hao Wang, Ziyu Zhan, Futai Hu, Yuan Meng, Zeqi Liu, Xing Fu, Qiang Liu. Intelligent optoelectronic processor for orbital angular momentum spectrum measurement[J]. PhotoniX, 2023, 4(1): 9
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