Creating and stabilizing Bi NIR-emitting centers in low Bi content materials by topo-chemical reduction and tailoring of the local glass structure

摘要: Bismuth (Bi) functionalized glass and fibers have been attracting much attention due to their super broad 1000–1700 nm emission huge potential for use in new types of fiber lasers optical amplifiers. Currently, Bi are achieved with only low content fibers, which usually suffer from absorption, weak insufficient anti-thermal quenching. It remains unsolved how intensify the absorption intensity materials stabilize active centers as key realizing applications lasers. Moreover, co-existence multiple centers, behavior near-infrared (NIR) unclear. Here, taking silicate glasses a model system, we demonstrate formation NIR intense enhancement by topo-chemical reduction ions tailoring structure. By constructing local environment through introduction nitride, dramatic changes, including highly intensified comparable (∼1200 times), were glass. We also observed excellent quenching this glass, may be strengthened structure resulting partial substitution oxygen nitrogen network. Furthermore, same scenario can reproduced other typical systems. believe that work is helpful improving performance existing Bi-doped content, our results indicate oxynitride exhibit effect compact present platform high photonic glasses.