Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the Powersphere
The powersphere is a spherical enclosed receiver composed of multiple photovoltaic cells. It serves as a replacement for traditional photovoltaic panels in laser wireless power transmission systems for optoelectronic conversion. The ideal powersphere aims to achieve a uniform distribution of light w...
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| Format: | Article |
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MDPI AG
2024-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/2/128 |
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| author | Tiefeng He Guobing Pan Guoliang Zheng Zikun Xu Zhijian Lv Qingyang Wu Lili Wan Haixuan Huang Tianyu Shi |
| author_facet | Tiefeng He Guobing Pan Guoliang Zheng Zikun Xu Zhijian Lv Qingyang Wu Lili Wan Haixuan Huang Tianyu Shi |
| author_sort | Tiefeng He |
| collection | DOAJ |
| description | The powersphere is a spherical enclosed receiver composed of multiple photovoltaic cells. It serves as a replacement for traditional photovoltaic panels in laser wireless power transmission systems for optoelectronic conversion. The ideal powersphere aims to achieve a uniform distribution of light within the cavity through infinite reflections, reducing energy losses in the circuit. However, due to the high absorption rate of the photovoltaic cells, the direct irradiation area on the inner surface of the powersphere exhibits a significantly higher light intensity than the reflected area, resulting in a suboptimal level of light uniformity and certain circuit losses. To address the aforementioned issues, a method of intra-cavity beam splitting in the powersphere is proposed. This solution aims to increase the area of direct illumination and reduce the intensity difference between direct and reflected lights, thereby improving the light uniformity on the inner surface of the powersphere. Utilizing the transformation matrix of Gaussian beams, the q parameters for each optical path with beam splitting were calculated, and the equality of corresponding q values was demonstrated. Further, based on the q parameter expression for the electric field of Gaussian beams, the intensities for each optical path were calculated, and it was demonstrated that their values are equal. Additionally, an optical software was utilized to establish a model for intra-cavity beam splitting in the powersphere. Based on this model, a beam-splitting system was designed using a semi-transparent and semi-reflective lens as the core component. The light uniformity performance of the proposed system was analyzed through simulations. To further validate the effectiveness of the calculations, design, and simulations, multiple lenses were employed to construct the beam-splitting system. An experimental platform was set up, consisting of a semiconductor laser, monocrystalline silicon photovoltaic cells, beam expander, Fresnel lens, beam-splitting system, and powersphere. An experimental verification was conducted, and the results aligned with the theoretical calculations and simulated outcomes. The above theory, simulations, and experiments demonstrate that the intra-cavity beam-splitting method effectively enhances the optical uniformity within the powersphere. |
| first_indexed | 2024-03-07T22:16:44Z |
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| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-07T22:16:44Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-40a85503a582426bbf32d0f9cd1b9ed62024-02-23T15:31:37ZengMDPI AGPhotonics2304-67322024-01-0111212810.3390/photonics11020128Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the PowersphereTiefeng He0Guobing Pan1Guoliang Zheng2Zikun Xu3Zhijian Lv4Qingyang Wu5Lili Wan6Haixuan Huang7Tianyu Shi8Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, ChinaSchool of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaSino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, ChinaSino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, ChinaSino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of Big Data and Internet, Shenzhen Technology University, Shenzhen 518118, ChinaSino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of Big Data and Internet, Shenzhen Technology University, Shenzhen 518118, ChinaSino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, ChinaThe powersphere is a spherical enclosed receiver composed of multiple photovoltaic cells. It serves as a replacement for traditional photovoltaic panels in laser wireless power transmission systems for optoelectronic conversion. The ideal powersphere aims to achieve a uniform distribution of light within the cavity through infinite reflections, reducing energy losses in the circuit. However, due to the high absorption rate of the photovoltaic cells, the direct irradiation area on the inner surface of the powersphere exhibits a significantly higher light intensity than the reflected area, resulting in a suboptimal level of light uniformity and certain circuit losses. To address the aforementioned issues, a method of intra-cavity beam splitting in the powersphere is proposed. This solution aims to increase the area of direct illumination and reduce the intensity difference between direct and reflected lights, thereby improving the light uniformity on the inner surface of the powersphere. Utilizing the transformation matrix of Gaussian beams, the q parameters for each optical path with beam splitting were calculated, and the equality of corresponding q values was demonstrated. Further, based on the q parameter expression for the electric field of Gaussian beams, the intensities for each optical path were calculated, and it was demonstrated that their values are equal. Additionally, an optical software was utilized to establish a model for intra-cavity beam splitting in the powersphere. Based on this model, a beam-splitting system was designed using a semi-transparent and semi-reflective lens as the core component. The light uniformity performance of the proposed system was analyzed through simulations. To further validate the effectiveness of the calculations, design, and simulations, multiple lenses were employed to construct the beam-splitting system. An experimental platform was set up, consisting of a semiconductor laser, monocrystalline silicon photovoltaic cells, beam expander, Fresnel lens, beam-splitting system, and powersphere. An experimental verification was conducted, and the results aligned with the theoretical calculations and simulated outcomes. The above theory, simulations, and experiments demonstrate that the intra-cavity beam-splitting method effectively enhances the optical uniformity within the powersphere.https://www.mdpi.com/2304-6732/11/2/128conversion efficiencylaserpowersphereuniformwireless energy transmission |
| spellingShingle | Tiefeng He Guobing Pan Guoliang Zheng Zikun Xu Zhijian Lv Qingyang Wu Lili Wan Haixuan Huang Tianyu Shi Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the Powersphere Photonics conversion efficiency laser powersphere uniform wireless energy transmission |
| title | Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the Powersphere |
| title_full | Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the Powersphere |
| title_fullStr | Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the Powersphere |
| title_full_unstemmed | Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the Powersphere |
| title_short | Experimentation and Analysis of Intra-Cavity Beam-Splitting Method to Enhance the Uniformity of Light in the Powersphere |
| title_sort | experimentation and analysis of intra cavity beam splitting method to enhance the uniformity of light in the powersphere |
| topic | conversion efficiency laser powersphere uniform wireless energy transmission |
| url | https://www.mdpi.com/2304-6732/11/2/128 |
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