Single Sideband Suppressed Carrier Modulator for C-Band Multiple Access FSO Communication

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI) Pub Date : 2022-07-10 DOI:10.1109/AP-S/USNC-URSI47032.2022.9886316

R. Sabri, H. Mosallaei

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Abstract

A Design procedure to realize a single sideband suppressed carrier (SSB-SC) modulator for free space optical (FSO) communication is theoretically presented. The operating principle relies on introducing spatiotemporal modulation into an indium-tin-oxide integrated plasmonic metasurface to obtain a time-varying output signal that is characterized by a sawtooth phase profile spanning on 2π and a constant amplitude. It is demonstrated that such spatiotemporal modulator transfers the incident signal into the first-order up-modulated sideband with more than 99% frequency conversion efficiency. The optical carrier suppression and undesired sideband rejection of 44 dB and 39 dB are calculated for the SSB-SC modulator, respectively. The application of the high-performance elements for multichannel multibeam scanning over a space-time shared-aperture platform is investigated. Thanks to the strong suppression of all undesired mixing products, the crosstalk between the channels with the same operating wavelength is significantly reduced.

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c波段多址FSO通信的单边带抑制载波调制器

从理论上介绍了一种用于自由空间光通信的单边带抑制载波(SSB-SC)调制器的设计方法。工作原理依赖于在铟锡氧化物集成等离子体超表面引入时空调制，以获得一个时变的输出信号，其特征是跨越2π的锯齿相位轮廓和恒定的振幅。结果表明，该时空调制器能以99%以上的频率转换效率将入射信号传输到一阶上调边带。对SSB-SC调制器分别计算了44 dB的光载波抑制和39 dB的非期望边带抑制。研究了高性能元件在时空共享孔径平台上多通道多波束扫描中的应用。由于强抑制了所有不希望的混合产物，具有相同工作波长的通道之间的串扰显着减少。

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2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)

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