300 GHz Wireless Link Based on Whole Comb Modulation of Integrated Kerr Soliton Combs

A Kerr microresonator frequency comb, combined with an ultrafast photodiode, has been utilized to generate millimeter- and terahertz-waves with low-phase-noise. This new light source shows promise for wireless communication above the 100 GHz band, where a high signal-to-noise ratio carrier signal is necessary to achieve high data rates. In this study, two efficient wireless link architectures based on a microresonator comb are demonstrated. The experiment shows that simultaneous modulation and detection of multiple comb lines leads to more than 10 times stronger modulation signal strength compared to two-line detection at the receiver. The successful transmission of complex modulation formats up to 64 quadrature amplitude modulation confirms that the microresonator comb and the proposed modulation method are effective for modern wireless communication.