Long cavity and low repetition rate passively mode-locked fiber laser with high-energy right angle trapezoid shaped soliton in anomalous dispersion regimeWenfeng Luo, Shuyuan Lv, Xiaoxia Zhao and Dun QiaoEur. Phys. J. D, 69 4 (2015) 96DOI: https://doi.org/10.1140/epjd/e2015-50471-7