Two-watt mid-infrared laser emission in robust fluorozirconate fibers
Changjun Xu, Jiquan Zhang, Xiaotong Zhao, Haiyan Zhao, Fengzi Ling, Shijie Jia, Gerald Farrell, Shunbin Wang, Pengfei Wang
Abstract
To the best of our knowledge, we report here the first demonstration of 2.9 µm laser emission from in-house fabricated Ho 3+ /Pr 3+ co-doped ZBYA glass fiber. The fiber was fabricated based on the ZBYA glass with compositions of ZrF 4 –BaF 2 –YF 3 –AlF 3 –PbF 2 –HoF 3 -PrF 3 . Under the pump of a 1150 nm Raman fiber laser, the maximum unsaturated output power of 2.16 W was obtained in a 15 cm long gain fiber with a slope efficiency of 24%. The influence of rare-earth doping concentration on laser performance was also investigated. The result indicates that ZBYA glass fibers have potential for using as a fluorozirconate glass gain fiber for mid-infrared fiber lasers.