Amplification of 12 OAM states in an air-core EDF. - Qiongyue Kang; Patrick Gregg; Yongmin Jung; Ee Leong Lim; Shaif-Ul Alam; Siddharth Ramachandran; David J. Richardson (OFC, 2015)

Optical orbital angular momentum amplifier based on an air-core erbium doped fiber. - Yongmin Jung; Qiongyue Kang; Seongwoo Yoo; R. Sidharthan; D. Ho; Patrick Gregg; S. Ramachandran; Shaif-Ul Alam; David J. Richardson (OFC, 2016)

12 Mode, MIMO-free OAM transmission. - Kasper Ingerslev; Patrick Gregg; Michael Galili; Francesco Da Ros; Hao Hu 009; Fangdi Bao; Mario A. Usuga Castaneda; Poul Kristensen; Andrea Rubano; Lorenzo Marrucci; Siddharth Ramachandran; Karsten Rottwitt; et al. (OFC, 2017)