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28 February 2020 High-speed data transmission system using silicon-based optical phased array
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Proceedings Volume 11286, Optical Interconnects XX; 112861A (2020)
Event: SPIE OPTO, 2020, San Francisco, California, United States
Optical wireless data transmission is an emerging complementary technology compared to the RF transmission in 5G and 6G communications. The optical phased array (OPA) would be a promising component for such high-speed wireless transmission requiring beam-steering function. We achieved 25Gbps data transmission using silicon-based OPA and commercialized photodetector (PD). OPA was designed as 64 channels having output beam divergence angle less than 1 for both horizontal and vertical direction. The diverging beam is received by high-speed PD with active diameter less than 30μm. The demonstration of 20Gbps data transmission was practiced with OPA’s output beam power as 0dBm and a freespace range of 1.5m. Received signal from photodetector has an eye-diagram with an extinction ratio of 5dB. Depending on our link power budget, higher output beam power and smaller beam divergence angle concludes to longer free-space range and larger bandwidth. Improvements on beam concentration by lens system could also increase range and bandwidth.
Conference Presentation
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Hyun-Woo Rhee, Jong-Bum You, Kyeongjin Han, and Hyo-Hoon Park "High-speed data transmission system using silicon-based optical phased array", Proc. SPIE 11286, Optical Interconnects XX, 112861A (28 February 2020);

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