All-fiber-based laser with 200 mHz linewidth Huang, Junchao ; Wang, Lingke ; Duan, Yifei ; Huang, Yafeng ; Ye, Meifeng ; Liu, Liang ; Li, Tang Abstract Publication: Chinese Optics Letters Pub Date: 2019 DOI: 10.3788/COL201917.071407 Bibcode: 2019ChOpL..17g1407H