Photonic Generation of Linearly Chirped Microwave Waveforms Using a Silicon-Based On-Chip Spectral Shaper Incorporating Two Linearly Chirped Waveguide Bragg Gratings PROJECT TITLE :Photonic Generation of Linearly Chirped Microwave Waveforms Using a Silicon-Based On-Chip Spectral Shaper Incorporating Two Linearly Chirped Waveguide Bragg GratingsABSTRACT:Photonic generation of linearly chirped microwave waveforms employing a silicon-based mostly on-chip spectral shaper is proposed and demonstrated. The on-chip optical spectral shaper includes a Mach–Zehnder interferometer (MZI) structure, in which 2 identical linearly chirped waveguide gratings (LC-WBGs) with opposite chirp rates are incorporated into the two arms. The LC-WBGs are fabricated on 2 rib waveguides by linearly varying the rib widths along the gratings to produce linear chirps. By adding an offset waveguide to 1 arm of the MZI and controlling the length of the offset waveguide, the spectral response of the shaper will be controlled to possess a symmetrical, linearly increasing, or linearly decreasing free spectral range, that is needed for the generation of a linearly chirped microwave waveform primarily based on spectral-shaping and wavelength-to-time mapping. The proposed device is fabricated employing a CMOS-compatible process with 193-nm deep ultraviolet lithography. A theoretical analysis on the chirped microwave waveform generation is performed, that is verified by an experiment. 2 linearly chirped microwave waveforms with symmetrical and uniform chirp profiles are experimentally generated using 2 fabricated spectral shapers with completely different lengths of the offset waveguides. Did you like this research project? To get this research project Guidelines, Training and Code... Click Here facebook twitter google+ linkedin stumble pinterest Feedback Decoupling of Linear Multivariable Systems Quasistatic and Pulsed Current-Induced Switching With Spin-Orbit Torques in Ultrathin Films With Perpendicular Magnetic Anisotropy