Abstract-0.4 THz Photonic-Wireless Link With 106 Gb/s Single Channel Bitrate

Shi Jia,  Xiaodan Pang, Oskars Ozolins,  Xianbin Yu, Hao Hu,  Jinlong Yu,  Pengyu Guan,  Francesco Da Ros,  Sergei Popov,  Gunnar Jacobsen,  Michael Galili,  Toshio Morioka,  Darko Zibar,  Leif K. Oxenløwe

http://ieeexplore.ieee.org/document/8118078/

To accommodate the demand of exponentially increased global wireless data traffic, the prospective data rates for wireless communication in the market place will soon reach 100 Gb/s and beyond. In the lab environment, wireless transmission throughput has been elevated to the level of over 100 Gb/s attributed to the development of photonic-assisted millimeter wave and terahertz (THz) technologies. However, most of recent demonstrations with over 100 Gb/s data rates are based on spatial or frequency division multiplexing techniques, resulting in increased system's complexity and energy consumption. Here, we experimentally demonstrate a single channel 0.4 THz photonic-wireless link achieving a net data rate of beyond 100 Gb/s by using a single pair of THz emitter and receiver, without employing any spatial/frequency division multiplexing techniques. The high throughput up to 106 Gb/s within a single THz channel is enabled by combining spectrally efficient modulation format, ultrabroadband THz transceiver and advanced digital signal processing routine. Besides that, our demonstration from system-wide implementation viewpoint also features high transmission stability, and hence shows its great potential to not only decrease the system's complexity, but also meet the requirements of prospective data rates for bandwidth-hungry short-range wireless applications.

Abstract-120 Gb/s Multi-Channel THz Wireless Transmission and THz Receiver Performance Analysis

Shi Jia,  Xianbin Yu,   Hao Hu,  Jinlong Yu, Toshio Morioka,  Peter U. Jepsen,  Leif K. Oxenløwe,


http://ieeexplore.ieee.org/document/7803602/

A photonic multi-channel terahertz (THz) wireless transmission system in the 350-475 GHz band is experimentally demonstrated. The employment of six THz carriers modulated with 10 Gbaud Nyquist quadrature phase-shift keying baseband signal per carrier results in an overall capacity of up to 120 Gb/s. The THz carriers with high-frequency stability and low phase noise are generated based on photonic photomixing of 25-GHz spaced six optical tones and a single optical local oscillator derived from a same optical frequency comb in an ultrabroadband uni-travelling carrier photodiode. The bit-error-rate performance below the hard decision forward error correction threshold of 3.8×10-3 for all the channels is successfully achieved after wireless delivery. Furthermore, we also investigate the influence of the harmonic spurs in a THz receiver on the performance of transmission system, and the experimental results suggest more than 30 dB spur suppression ratio in downconverted intermediate frequency signals for obtaining less than 1 dB interference.