PaperOOptics Express11d agoInverse design of a 125-µm-cladding 7-core OAM fiber amplifier with alternating air-holes for high pump efficiencyRuilin Gou·Guijun Hu·Haowen Bi·Jingxin Bao·Meiling ZhangRead at Optics ExpressShareLess like thisTagsPhotonic Crystal and Fiber OpticsElectrical and Electronic Engineering