Integrated photonic system senses spectrum up to 120 GHz

What the study found

The study reports an integrated photonic real-time spectrum sensing system that covers microwave to sub-terahertz frequencies. It achieved a 57.5 GHz analysis bandwidth, measurable frequencies up to 120 GHz, and latency of less than 110 ns.

Why the authors say this matters

The authors say real-time spectrum sensing is important for sixth-generation (6G) networks because it supports dynamic spectrum management and integrated sensing and communication, which they describe as emerging applications. They conclude that their compact system offers a solution for high-efficiency spectrum management in 6G integrated sensing and communication networks.

What the researchers tested

The researchers built a system on a thin-film lithium niobate platform. The chip integrated a broadband electro-optic modulator for signal loading, an electro-optic microring filter bank for high-speed parallel frequency-to-time mapping, and an electro-optic comb for channel referencing.

What worked and what didn't

The system worked as a real-time spectrum sensor across microwave to sub-terahertz bands. The abstract reports that it reached 57.5 GHz analysis bandwidth, measured frequencies up to 120 GHz, and operated with less than 110 ns latency.

The system was also validated in a proof-of-concept integrated sensing and communication demonstration, where a radar adaptively accessed underutilized spectral regions for ranging under dynamic communication interference.

What to keep in mind

The abstract describes a proof-of-concept demonstration, so the reported application is limited to that demonstration setting. No additional limitations are described in the available summary.