Complex Pulse Profile Optimization by Chromatic Dispersion Management in Coupled Opto-Electronic Oscillator Based on Semiconductor Optical Amplifier

An Ikeda map iterative numerical model completed with an analytical Gaussian analysis and experimental measurements of complex pulse profile and phase noise performance at 10 GHz are proposed. This work aims to study and optimize the chromatic dispersion of a fibered mode-locked laser (MLL) based on a semiconductor optical amplifier (SOA) as part of a coupled optoelectronic oscillator (COEO). We will demonstrate that a close to zero anomalous dispersion regime is preferred as it allows the generation of optical picosecond pulses with minimum full width at half maximum (FWHM) and maximizes the absolute value of chirp and peak power. This guarantees the generation of narrow and diffraction-limited optical pulses after the chromatic dispersion compensating stage prior photodetection in order to lower the phase noise of the microwave signal generated at 10 GHz but also for high-order microwave harmonics synthesis.