Scalable WDM phase regeneration in a single
phase-sensitive ampliﬁer through optical time
, Francesco Da Ros
, Mads Lillieholm
, Niels-Kristian Kjøller
, Hao Hu
Kasper Meldgaard Røge
, Michael Galili
, Toshio Morioka
& Leif Katsuo Oxenløwe
Optical data regeneration is attractive, due to its potential to increase transmission reach and
data throughput in communication systems, and several interesting proposals have been
made. However, efﬁcient and scalable solutions for regeneration of multiple parallel wave-
length channels have been elusive, constituting a key challenge, which must be overcome for
optical regeneration to have any prospect of being adapted in actual communication systems.
Here we report a scalable wavelength-division multiplexing (WDM) regeneration scheme for
phase only regeneration, which satisﬁes the multichannel requirement, using a set of optical
time-lens-based Fourier processors combined with a single phase-sensitive ampliﬁer (PSA).
We describe the concept theoretically, and experimentally demonstrate simultaneous
regeneration of 16 WDM channels with 50-GHz spacing, each carrying 10-Gbit/s DPSK
phase-modulated data. The proposed scheme relies on ultrafast broadband optical proces-
sing and is inherently scalable in modulation speed and channel number.
DTU Fotonik, Technical University of Denmark, Ørsteds Plads 343, Kgs. Lyngby 2800 DK, Denmark. Correspondence and requests for materials should be
addressed to P.G. (email: email@example.com) or to L.K.Oøw. (email: firstname.lastname@example.org)