Wireless data transmission in a 560-GHz band using low-phase-noise terahertz wave generated by photomixing of a pair of distributed feedback lasers injection-locking to Kerr micro-resonator soliton comb

TL;DR

This paper demonstrates high-speed wireless data transfer at 560 GHz using low-phase-noise terahertz waves generated by photomixing of injection-locked DFB lasers with a Kerr micro-resonator soliton comb, advancing 6G technology.

Contribution

It introduces a novel method of generating low-phase-noise THz waves via photomixing of injection-locked lasers with a Kerr micro-resonator, enabling high-speed wireless communication in the 560-GHz band.

Findings

Achieved near-error-free 1 Gbit/s data transfer in 560-GHz band.

Successfully implemented BPSK and QPSK modulation formats with low EVM.

Demonstrated 0.4 Gbit/s data transfer with 16QAM meeting IEEE standards.

Abstract

The demand for higher data rates in next-generation mobile wireless communication systems (6G) has led to significant interest in terahertz (THz) waves as a high-frequency, broad modulation bandwidth carrier wave. In this study, we propose and demonstrate a wireless data transfer in the 560-GHz band using low-phase-noise THz waves generated by photomixing of a pair of distributed feedback lasers injection-locking to Kerr micro-resonator soliton comb. Experimental results showed near-error-free on-off keying (OOK) data transfer at 1 Gbit/s in the 560-GHz band, with a Q-factor of 6.23, surpassing the error-free limit. Also, modulation formats of binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK) were successfully used, showing clear constellation diagrams and relatively low root mean squared error vector magnitude (rms EVM) values of 23.9% and 23.6%, respectively. Moreover, data transfer at 0.4 Gbit/s in 16 quadrature amplitude modulation (16QAM) demonstrated clear isolated symbols and achieved a low rms EVM value of 8.1%, complying with the IEEE 802.15.3d standard amendment. These demonstrations highlight the potential of using injection-locked DFB lasers with the Kerr micro-resonator soliton comb to achieve high-quality, high-speed wireless data transfer in the 560-GHz band. These findings contribute significantly to the advancement of wireless communication technology in the THz frequency range and pave the way for the realization of 6G wireless communication systems.