面向激光无线传能的光场调控技术研究
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上海交通大学区域光纤通信网与新型光通信系统国家重点实验室

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xx

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科技部重点研发计划(2019YFB1802903).


Light field manipulation for optical wireless power transfer
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State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University

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National Key Research and Development Program of China (2019YFB1802903).

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    摘要:

    在激光无线传能应用中,传能效率取决于激光器电光转换效率、空间传输损耗和光伏电池光电转换效率。其中,光场幅相特征与光伏电池排布的适配度对最终光电转换效率的影响巨大。本文对比了贝塞尔光束、艾里光束与高斯光束在激光能量传递中的光电转换效率,并且提出了利用菲涅耳-基尔霍夫衍射积分公式的逆向设计光场优化方法,实现了光场与光伏电池的阵列排布高适配度,以达到最优的光电转换效率。同时,本文针对不同距离以及不同角度下的光伏电池光电转换效率进行了实验研究。

    Abstract:

    In the application of optical wireless energy transfer, the efficiency of energy transfer depends on the electro-optical conversion efficiency of the laser, the space transmission loss, and the photoelectric conversion efficiency of the photovoltaic cell. Among them, the degree of adaptation between the light field amplitude and phase characteristics and the arrangement of photovoltaic cells has a huge impact on the final photoelectric conversion efficiency. In this letter, we compare the photoelectric conversion efficiency of the Bessel beam, Airy beam, and Gaussian beam in laser energy transfer. Meanwhile, an inverse design method is proposed that generates an optical field from the geometry of photovoltaic (PV) cells by Fresnel-Kirchhoff diffraction integral formula. This paper achieves a high degree of adaptation between the light field and the array of photovoltaic cells to achieve the best photoelectric conversion efficiency. Meanwhile,this paper conducts experimental research on the photoelectric conversion efficiency of photovoltaic cells at different distances and different angles.

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  • 收稿日期:2020-10-27
  • 最后修改日期:2020-10-27
  • 录用日期:2020-11-06
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