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Performance investigation of diffractive optical elements effect and rain attenuation on BER of an optical free space communication based system

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Abstract

In an optical like free space optical communication system, there always exits a focal or focal reflective optical antenna system working as beam expander. As optical antenna can expand and reshape the narrow and highly collimated emitted beam, it efficiently compresses divergence angle and decreases the influence of beam expansion in space optical communication. However, the optical antenna structure will decrease the transmission power for the obscuration loss caused by the secondary reflective mirror. The design of two-mirror reflective optical antenna at Tx affects the transmission efficiency in space uplink optical communication. An improved scheme with two diffractive optical elements (DOEs) can help reduce central obscuration caused by the secondary mirror of optical antenna. In order to further investigate the influence of the DOEs on communication quality, we give a bit error rate (BER) model based on space uplink optical communication system. The effect of the DOEs on the relationship curves of BER versus typical parameters at different obscuration ratios of optical antenna is the research focus. Typical system parameters include transmission power, receiving diameter, Receiver angle, divergence angle and wavelength. With the demand for data volume and data velocity growing, space optical communication has gained extensive attention. It originated in the 1960s and a large number of ground verification experiments have been carried out since 1980. Compared with traditional microwave communication, space optical communication has the advantages of small volume, low power consumption, large optical gain, and small divergence angle, strong anti-jamming and anti-interception ability.

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Soni, G., Gupta, S. & Vaish, A. Performance investigation of diffractive optical elements effect and rain attenuation on BER of an optical free space communication based system. J Opt 50, 606–610 (2021). https://doi.org/10.1007/s12596-021-00720-z

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  • DOI: https://doi.org/10.1007/s12596-021-00720-z

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