2 km Uncompressed HD Video Wireless Transmission at 100 GHz Based on All-Optical Frequency Up- and Down-Conversion

Area of Science:

• Wireless Communication Systems
• Optical Engineering
• Signal Processing

Background:

• Millimeter-wave (mmWave) systems are key for future 6G communication due to their high bandwidth.
• Existing receiver technologies face limitations in achieving the high data rates and extended coverage required for 6G.

Purpose of the Study:

• To experimentally compare the performance of all-optical and all-electric receivers for mmWave communication.
• To demonstrate the feasibility of high-speed, long-range data transmission using an all-optical transceiver.

Main Methods:

• Utilized photonics-assisted heterodyne beating at the transmitter for mmWave generation.
• Employed an avalanche photodiode (APD)-based all-optical receiver and an envelope detection-based all-electric receiver.
• Conducted experiments over a 15 m wireless link and demonstrated real-time HD video transmission over 200 m and 2 km.

Main Results:

• The all-optical transceiver achieved error-free transmission at 11.318 Gbps over 200 m without clock recovery.
• The all-electric receiver was limited to 3.125 Gbps error-free transmission over 15 m.
• Demonstrated real-time uncompressed HD video transmission over 200 m and 2 km using the all-optical system.

Conclusions:

• The all-optical receiver architecture significantly outperforms all-electric receivers in terms of data rate and transmission distance for mmWave systems.
• The proposed all-optical system is a promising solution for future 6G applications demanding ultra-wideband, high capacity, and wide coverage.
• This research validates the potential of photonic solutions for next-generation high-speed wireless communications.