Wang Yong-Sheng, Zhao Tong, Wang An-Bang, Zhang Ming-Jiang, Wang Yun-Cai. Conversion of external cavity mechanism of millimeter-level external cavity semiconductor laser by significantly increasing relaxation oscillation frequencyJ. Acta Physica Sinica, 2017, 66(23): 234204. DOI: 10.7498/aps.66.234204