title: Simultaneous subchannel data updating for multiple channels of 16-quadrature amplitude modulation signals using a single periodically poled lithium niobate waveguide.
abstract: Subchannel data updating of high-order modulation format signals using cascaded sum- and difference-frequency generation in a single periodically poled lithium niobate waveguide is demonstrated. One quadrature phase-shift-keying subchannel of a 16-quadrature amplitude modulation (QAM) signal at 40 Gbit/s is successfully updated, with an optical signal-to-noise ratio (OSNR) penalty of ~2 dB for return-to-zero and ~4 dB for non-return-to-zero at a bit-error rate (BER) of 2×10(-3). Simultaneous processing of four wavelength-multiplexed 16-QAM signals with an average OSNR penalty of 4.5 dB at a BER of 2×10(-3) is also demonstrated.
authors.affiliation: Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA. haoh@usc.edu
authors.forename: Hao
authors.initials: H
authors.lastname: Huang
authors.forename: Jeng-Yuan
authors.initials: JY
authors.lastname: Yang
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Wu
authors.forename: Salman
authors.initials: S
authors.lastname: Khaleghi
authors.forename: Morteza
authors.initials: M
authors.lastname: Ziyadi
authors.forename: Moshe
authors.initials: M
authors.lastname: Tur
authors.forename: Carsten
authors.initials: C
authors.lastname: Langrock
authors.forename: Martin M
authors.initials: MM
authors.lastname: Fejer
authors.forename: Loukas
authors.initials: L
authors.lastname: Paraschis
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner