Simultaneous Generation of WDM Chirped Microwave Waveforms Using Integrated Spectral Shapers in Silicon Photonics

We demonstrate a simultaneous generation of wavelength-division-multiplexed chirped microwave waveforms using an optical spectral shaping followed by a wavelength-to-time mapping. We design two types of integrated spectral shapers based on parallel distributed Fabry-Pérot cavities or an arrayed waveguide grating Sagnac interferometer incorporating linearly chirped waveguide Bragg gratings. The generated waveforms have different central RF frequencies and the opposite signs of RF chirp.