Tunable Bragg filter based on Polymer/Silica Hybrid waveguide platform

Abstract Owing to compact footprint and superior filter property, the Bragg grating filter is attractive for the applications in optical communications. In this research, we conducted a detailed analysis of the influence of Bragg grating parameters on its functionality and experimentally validated our findings on a simply and low-cost polymer/silica hybrid waveguide platform. The best result of 26.3 dB extinction ratio happens while the period is 6.63 μm with the period number of 200. The full width at half maximum of the grating is 0.35 nm at 1544.74 nm. Tuning efficiency reaches 29.6 pm/mW owing to the high thermo-optical efficiency of polymer. Finally, we measure the rise and fall times of the grating are 280 μs, respectively. The proposed grating shows great potential in flexible and reconfigurable optical network.