Photonics-assisted joint radar detection and frequency measurement system

A photonics-assisted joint radar detection and microwave frequency measurement system is proposed. A broadband dual-chirp linear frequency-modulated (LFM) signal is generated based on an optically injected semiconductor laser, which is later shared by two functional modules. Thanks to the photonics-assisted broadband signal generation method, both radar detection with high resolution and microwave frequency measurement with high accuracy can be realized without using high-speed electronic devices. In the experiment, a twodimensional resolution of 1.25 cm x 1.33 cm and a measurement error within +/- 50 MHz are achieved in radar detection and frequency measurement, respectively.