title: Optical chopper-based re-circulating loop for few-mode fiber transmission.
abstract: An optical chopper-based re-circulating loop is presented for emulating long-haul transmission using few-mode fiber (FMF). A proper functioning of the loop is verified by transmission of three-mode-division multiplexed × 128  Gb/s DP-QPSK over more than 1000 km of FMF.
authors.forename: V A J M
authors.initials: VA
authors.lastname: Sleiffer
authors.forename: Y
authors.initials: Y
authors.lastname: Jung
authors.forename: M
authors.initials: M
authors.lastname: Kuschnerov
authors.forename: S U
authors.initials: SU
authors.lastname: Alam
authors.forename: D J
authors.initials: DJ
authors.lastname: Richardson
authors.forename: L
authors.initials: L
authors.lastname: Grüner-Nielsen
authors.forename: Y
authors.initials: Y
authors.lastname: Sun
authors.forename: H
authors.initials: H
authors.lastname: de Waardt