Description:
Abstract
To enhance communication system capacity, USC researchers have successfully utilized multiplexing of multiple co-propagating beams, with each having a mutually orthogonal spatial modal structure. When multiplexing two polarizations, M frequencies, and N spatial modes, data capacity can be increased by a factor of 2 x M x N, and spectral efficiency could be enhanced by a factor of 2 x N compared to single beam transmission. A total data rate of 80-Gbit/s for a THz wireless communication system has been experimentally demonstrated when multiplexing 8 channels. The THz data channels are generated by mixing an optical modulated signal with a continuous wave laser source in a positive-intrinsic-negative photodiode-based emitter. THz-OAM beams are generated and detected using spiral phase plates made of high-density polyethylene.
Benefits
- Increases available bandwidth and data capacity of THz communication systems
- Transmits THz signal at >80 Gbit/s while supporting 8 or more data channels
Market Application
For the next generation of wireless communications (5G/6G), there is growing demand for increased data transmission at higher speeds while maintaining transmission reliability to benefit wireless backhaul networks. The 0.1-1 terahertz (THz) carrier-frequency range presents an opportunity to expand the available bandwidth for communication systems, and the capacity of THz communication systems can be further augmented by simultaneously transmitting and multiplexing independent data channels
Publications
Zhou, Huibin, et al. "Utilizing multiplexing of structured THz beams carrying orbital-angular-momentum for high-capacity communications." Optics Express 30.14 (2022): 25418-25432. https://doi.org/10.1364/OE.459720
Stage of Development
- Proof of concept demonstrated
- Simulation tested
- Available for licensing