Original Research Published on 03 Jun 2020 Orbital Angular Momentum Optical Amplifier Based on PbS-Doped Ring-Core Fiber in Optics and Photonics Lingmin XuYana ShangJinhong YangZhenyi ChenFufei PangHuanhuan LiuYanhua DongNa ChenJianxiang WenTingyun Wang Frontiers in Physics doi 10.3389/fphy.2020.00198 3,845 views 2 citations