title: 2 Tbit/s free-space data transmission on two orthogonal orbital-angular-momentum beams each carrying 25 WDM channels.
abstract: We demonstrate a 2 Tbit/s free-space data link using two orthogonal orbital angular momentum beams each carrying 25 different wavelength-division-multiplexing channels. We measure the performance for different modulation formats, including directly detected 40 Gbit/s nonreturn-to-zero (NRZ) differential phase-shift keying, 40 Gbit/s NRZ on-off keying, and coherently-detected 10 Gbaud NRZ quadrature phase-shift keying, and achieve low bit error rates with penalties less than 5 dB.
authors.affiliation: Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA.
authors.forename: Irfan M
authors.initials: IM
authors.lastname: Fazal
authors.forename: Nisar
authors.initials: N
authors.lastname: Ahmed
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Jeng-Yuan
authors.initials: JY
authors.lastname: Yang
authors.forename: Yan
authors.initials: Y
authors.lastname: Yan
authors.forename: Bishara
authors.initials: B
authors.lastname: Shamee
authors.forename: Hao
authors.initials: H
authors.lastname: Huang
authors.forename: Yang
authors.initials: Y
authors.lastname: Yue
authors.forename: Sam
authors.initials: S
authors.lastname: Dolinar
authors.forename: Moshe
authors.initials: M
authors.lastname: Tur
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner