Organic dye-loaded reduced titanium dioxide as a broadband saturable absorber for ultrafast fiber lasers

Abstract

In this study, the organic dye methylene blue (MB) is used as the dopant to modify TiO2−x to form TiO2−x-MB, which can be utilized as a saturable absorber (SA) in mode-locked fiber lasers at 1.55 μm and 2.0 μm for generating ultrashort pulses.