High-power nanosecond pulse generation from an integrated Tm-Ho fiber MOPA over 21 μm Yao, Weichao ; Shen, Chongfeng ; Shao, Zhenhua ; Liu, Qiyao ; Wang, Haotian ; Zhao, Yongguang ; Shen, Deyuan Abstract Publication: Optics Express Pub Date: April 2018 DOI: 10.1364/OE.26.008841 Bibcode: 2018OExpr..26.8841Y