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Loss ratio parameter $\gamma$ to analyze transmission characteristics for optical antenna systems

Miao He, Weinan Caiyang, Ping Jiang, Miaofang Zhou, Yan Qin, Biao Cao, and Huajun Yang

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Abstract

Analyzing optical antenna systems through geometrical optics is quite popular for its convenience, which, however, may cause remarkable errors. This paper uses both geometrical optics and diffraction theory to analyze the performance of a traditional optical antenna system, and the results calculated through the two methods are carefully compared. Based on the comparison, it shows the situations in which geometric optics will cause significant errors. In addition, a parameter $\gamma$ is defined to quickly determine whether geometrical optics is suitable for analyzing optical antenna systems under some situations. This paper can help engineers quickly choose the proper method for designing and analyzing optical antenna systems.

© 2021 Optical Society of America

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