Bi-doped glass fibers with controllable optical response are essential for next-generation broadband amplifiers and tunable lasers.However,achieving broad wavelength tunability and stable near-infrared(NIR)emission re...Bi-doped glass fibers with controllable optical response are essential for next-generation broadband amplifiers and tunable lasers.However,achieving broad wavelength tunability and stable near-infrared(NIR)emission remains challenging due to limited structural modification of conventional silica glasses and variability of Bi active centers(BACs).Here,we propose a cation hybridization strategy to overcome these issues,demonstrating an enhanced ultra-broadband,multi-band NIR optical response in Bi-doped photonic glasses.Alkaline earth metal ions,such as Mg^(2+)and Ba^(2+),were employed as the hybrid cations to“repair”(Mg^(2+))and“tailor”(Ba^(2+))the flexible glass network of germanate glasses,enabling precise customization of the local environment to stabilize different BACs.Impressively,this enables a tunable optical response,ranging from one main peak emission at 1142 nm to a stable multi-band emission spanning 920,1142,1265,and 1516 nm,with an emission bandwidth of 526 nm,which is distinct from conventional rare-earth ions doped glasses.Furthermore,Bi-doped hybrid germanate glass fibers were fabricated and a positive on-off gain in multiple communication bands(O+E+S+C bands)was successfully achieved.The results offer new insights into the Bi NIR luminescence behavior and introduce a promising strategy for developing advanced photonic glass materials.展开更多
基金supported by the National Natural Science Foundation of China(62405092,62122027,62075063,62205109)the Postdoctoral Fellowship Program of China Postdoctoral Science Foundation(GZC20230852)the Guangdong Basic and Applied Basic Research Foundation(2025A1515010444).
文摘Bi-doped glass fibers with controllable optical response are essential for next-generation broadband amplifiers and tunable lasers.However,achieving broad wavelength tunability and stable near-infrared(NIR)emission remains challenging due to limited structural modification of conventional silica glasses and variability of Bi active centers(BACs).Here,we propose a cation hybridization strategy to overcome these issues,demonstrating an enhanced ultra-broadband,multi-band NIR optical response in Bi-doped photonic glasses.Alkaline earth metal ions,such as Mg^(2+)and Ba^(2+),were employed as the hybrid cations to“repair”(Mg^(2+))and“tailor”(Ba^(2+))the flexible glass network of germanate glasses,enabling precise customization of the local environment to stabilize different BACs.Impressively,this enables a tunable optical response,ranging from one main peak emission at 1142 nm to a stable multi-band emission spanning 920,1142,1265,and 1516 nm,with an emission bandwidth of 526 nm,which is distinct from conventional rare-earth ions doped glasses.Furthermore,Bi-doped hybrid germanate glass fibers were fabricated and a positive on-off gain in multiple communication bands(O+E+S+C bands)was successfully achieved.The results offer new insights into the Bi NIR luminescence behavior and introduce a promising strategy for developing advanced photonic glass materials.
