Du Bing-Zheng, Zhu Jing-Ping, Mao Yu-Zheng, Liu Hong, Wang Kai, Hou Xun. Effects of Bragg periods per grating period on performance of Bragg concave diffraction gratingJ. Acta Physica Sinica, 2017, 66(22): 224202. DOI: 10.7498/aps.66.224202