title: Reconfigurable linear combination of phase-and-amplitude coded optical signals.
abstract: We introduce an all-optical arithmetic unit operating a weighted addition and subtraction between multiple phase-and-amplitude coded signals. The scheme corresponds to calculating the field dot-product of frequency channels with a static vector of coefficients. The system is reconfigurable and format transparent. It is based on Fourier-domain processing and multiple simultaneous four-wave mixing processes inside a single nonlinear element. We demonstrate the device with up to three channels at 40 Gb/s and evaluate its efficiency by measuring the bit-error-rate of a distortion compensation operation between two signals.
authors.forename: Yvan
authors.initials: Y
authors.lastname: Paquot
authors.forename: Jochen
authors.initials: J
authors.lastname: Schröder
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton