Ultra low RIN, low threshold AlGaInAs/InP BH-DFB laser Jianhua Ren, Yanhui Xing, Jun Han, Tianyu Sun, Zheng Xing, Can Yin and Baoshun Zhang J. Eur. Opt. Society-Rapid Publ., 20 1 (2024) 23 Published online: 31 May 2024 DOI: 10.1051/jeos/2024023