PD09–Reflection Spectra Analysis and Optimization of Phase-modulated Waveguide-grating Reflectors

Phase-modulated waveguide gratings are promising reflective optical elements for widely tunable laser applications. We present an analysis on their comb-like reflectivity response and address the impact of phase-shifts on the number of large reflection peaks, their envelope and on the effective grating coefficient. Utilizing a robust phase-modulation approach, this paper shows a quasi-stochastic numerical optimization method to control the reflectivity comb effectively.