| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Identifying the Symmetry of an Object Based on Orbital Angular Momentum through a Few-Mode Fiber |
| Zhou-Xiang Wang1, Yu-Chen Xie1, Han Zhou1, Shuang-Yin Huang1, Min Wang1, Rui Liu1, Wen-Rong Qi1, Qian-Qian Tian1, Ling-Jun Kong2,3, Chenghou Tu1, Yongnan Li1, Hui-Tian Wang2,3** |
1School of Physics and Key Laboratory of Weak-Light Nonlinear Photonics, Nankai University, Tianjin 300071
2School of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093
3Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093
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| Cite this article: |
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Zhou-Xiang Wang, Yu-Chen Xie, Han Zhou et al 2019 Chin. Phys. Lett. 36 124207 |
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Abstract In recent years, orbital angular momentum (OAM), as a new usable degree of freedom of photons, has been widely applied in both classical optics and quantum optics. For example, digital spiral imaging uses the OAM spectrum of the output beam from the object to restore the symmetry information of the object. However, the related experiments have been carried out in free space so far. Due to the poor anti-noise performance, limited transmission distance and other reasons, the practicability is seriously restricted. Here, we have carried out a digital spiral imaging experiment through a few-mode fiber, to achieve the identification of the symmetry of object by measuring the OAM spectrum of the output beam. In experiment, we have demonstrated the identification of the symmetry of amplitude-only and phase-only objects with the two-, three- and four-fold rotational symmetries. We also give the understanding of the physics. We believe that our work has greatly improved the practical application of digital spiral imaging in remote sensing.
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Received: 29 October 2019
Published: 25 November 2019
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| PACS: |
42.50.Tx
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(Optical angular momentum and its quantum aspects)
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42.30.Va
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(Image forming and processing)
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42.81.-i
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(Fiber optics)
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| Fund: Supported by the National Key R&D Program of China under Grant Nos 2017YFA0303800 and 2017YFA0303700, the National Natural Science Foundation of China under Grant Nos 11534006, 11674184, 11774183 and 11804187, the Natural Science Foundation of Tianjin under Grant No 16JCZDJC31300, and the Collaborative Innovation Center of Extreme Optics. |
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