Generation of soliton molecules in a 1.5-μm ultrafast fiber laser based on Zinc 2,5-dihydroxyterephthalate saturable absorber oleh Yishuai Wang, Kaiqi Liu, Yichao Zhang, Linshi Wang, Yuxian Zhang, Guanyun Ding, Zhenxiao Niu, Xu Xie, Jianqi Huang, Yuyue Gu, Fangteng Zhang, Youjun Zeng, Guanyu Liu