A wide field-of-view optical receiver based on a ball lens retroreflector for resonant beam charging applications

Syed F. A. Naqvi; Nadeem Javed; Ngoc-Luu Nguyen; Jinyong Ha

doi:10.1117/12.2689244

28 November 2023 A wide field-of-view optical receiver based on a ball lens retroreflector for resonant beam charging applications

Syed F. A. Naqvi, Nadeem Javed, Ngoc-Luu Nguyen, Jinyong Ha

Author Affiliations +

Proceedings Volume 12763, Photonics for Energy III; 127630V (2023) https://doi.org/10.1117/12.2689244
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

Resonant beam charging (RBC) is a promising alternative to traditional wireless power technologies (WPT) considering the safety and long-range power transmission parameters. RBC has an excellent feature of self-alignment of an optical beam to make a strong connection between transmitter and receiver using retroreflectors. However, there are certain limitations in selecting an appropriate retroreflector considering the receiver size, Photovoltaic (PV) cell efficiency, and wide field of view for mobile receiver charging. The current investigation showcases a promising configuration of a practical receiver for optical wireless charging applications. The receiver incorporates a small 2 mm ball lens retroreflector with refractive index 1.967 at 1060 nm to establish a resonant cavity. The ball lens has highly reflection (HR) coating on the rear side to achieve a sufficient reflective signal and an anti-reflection (AR) coating on the front side to avoid surface reflections. This coated small ball lens features a wide field of view (FOV) upon using a large beam diameter, making it ideal to be used in optical receiver for mobile receiver charging. The performance of proposed receiver is evaluated using a semiconductor optical amplifier (SOA) as a gain medium operating in a bidirectional scheme at a center wavelength of 1060 nm. The proposed receiver model can potentially enhance the illumination area on the photovoltaic receiver, thereby increasing its efficiency. To validate the performance of the proposed model, a GaSb PV cell is used in the scheme, which ensures a peak efficiency of 25%.

Citation Download Citation

Syed F. A. Naqvi, Nadeem Javed, Ngoc-Luu Nguyen, and Jinyong Ha "A wide field-of-view optical receiver based on a ball lens retroreflector for resonant beam charging applications", Proc. SPIE 12763, Photonics for Energy III, 127630V (28 November 2023); https://doi.org/10.1117/12.2689244

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