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Temporal solitons can arise in spectrally confined cavities with no chromatic dispersion. When the filter order tends to infinity, the soliton tends to a Nyquist pulse with a fully confined ultra-flat spectrum and a transform-limited waveform.

A novel method of wideband radiofrequency signal generation is proposed based on photonic phase digitizing and heterodyne mixing. Synthesis of a linear frequency-modulated radar waveform with a bandwidth of 4 GHz is demonstrated.

A hybrid radar-communication system for intelligent transportation based on optoelectronic oscillator is proposed. A code-stream with QPSK modulation of 2.4 Gb/s is generated experimentally at 24 GHz for high-speed communication and accurate ranging simultaneously.

We present a photonics-based W-band imaging radar for non-cooperative and noncontact security check with a two-dimension imaging resolution of ∼1.9cm × ∼1.6cm and an image frame rate of 200 fps.

A dispersion-compensated transmitter for the all-pass RoF link is demonstrated. CD-induced power fading and phase distortion are simultaneously eliminated with the bandwidth up to 25-GHz after 40-km SMF transmission. The SFDR is improved by 13.3-dB.

We demonstrate a microwave imaging radar experimental platform, using photonic generation of linear frequency modulated waveform centered at 10GHz with 4GHz bandwidth. Distance and velocity resolution of about 5cm and 2m/s are obtained experimentally.

We demonstrate wideband radar signal generation by combining the advantages of direct digital synthesis and photonic frequency multiplication. Linear frequency modulated waveforms with a time-bandwidth product as high as 3200 are generated experimentally.