Dividing and multiplying the mode order for orbital-angular-momentum beams. - Zhe Zhao 003; Yongxiong Ren; Guodong Xie; Long Li 001; Yan Yan 010; Nisar Ahmed; Zhe Wang 020; Nima Ashrafi; Solyman Ashrafi; Roger D. Linquist; Alan E. Willner (ECOC, 2015)

Exploiting the unique intensity gradient of an orbital-angular-momentum beam for accurate receiver alignment monitoring in a free-space communication link. - Guodong Xie; Long Li 001; Yongxiong Ren; Yan Yan 010; Nisar Ahmed; Zhe Zhao 003; Zhe Wang 020; Nima Ashrafi; Solyman Ashrafi; Roger D. Linquist; Alan E. Willner (ECOC, 2015)

400-Gbit/s free-space optical communications link over 120-meter using multiplexing of 4 collocated orbital-angular-momentum beams. - Yongxiong Ren; Zhe Wang 020; Peicheng Liao; Long Li 001; Guodong Xie; Hao Huang 002; Zhe Zhao 003; Yan Yan 010; Nisar Ahmed; Martin P. J. Lavery; Nima Ashrafi; Solyman Ashrafi; et al. (OFC, 2015)