DOI: 10.1109/TMTT.2024.3516776   IEEEXplore: https://ieeexplore.ieee.org/document/10819008    

Microwave photonic frequency measurement and time-frequency analysis system

1546.6 nm (for this implementation)

Combining microwave photonic methods with simple electronic sampling and processing achieves an analysis bandwidth exceeding 200 GHz and potentially exceeding 1 THz in the future with low hardware requirements. A dispersion-based frequency to time mapping implementation assisted by a duty-cycle-enabling technique applied to a 31.6 GHz bandwidth V-shaped linearly frequency-modulated (LFM) signal significantly improves the analysis bandwidth to hundreds of GHz with a temporal resolution of around 10 ns.

Cognitive radio, intelligent transportation systems, and electronic warfare systems that have stringent requirements for bandwidth and real-time performance.

252.8 GHz ambiguity-free analysis bandwidth with 1.1 GHz frequency resolution and 13.75 ns temporal resolution under conditions of 1/4 duty cycle on the V-shaped LFM signal, 6817 ps/nm absolute dispersion at 1546.6 nm, and 20 GHz sampling bandwidth; 126.4 GHz bandwidth and 6.875 ns resolution at 1/2 duty cycle; 63.2 GHz bandwidth and 3.4375 ns resolution with full duty cycle.