Dark rectangular noise-like pulses in a figure-nine fiber laser based on a nonlinear amplifying loop mirror Zhou, Renlai ; Yu, Dan ; Liu, Xuanyi ; Li, Qian ; Fu, H. Y. Abstract Publication: Optics Letters Pub Date: August 2019 DOI: 10.1364/OL.44.003717 Bibcode: 2019OptL...44.3717Z