title: Colorless all-optical sum and subtraction of phases for phase-shift keying signals based on a periodically poled lithium niobate waveguide.
abstract: A colorless all-optical scheme performing the subtraction and addition of phases between phase-shift keying (PSK) signals exploiting cascaded sum and difference frequency generation in a periodically poled lithium niobate waveguide is introduced and experimentally demonstrated. The subtraction of phases of two 40 Gb/s differential quadrature PSK signals has been experimentally tested and performances have been analyzed in terms of bit error rate measurements.
authors.affiliation: National Laboratory of Photonic Networks, Consorzio Nazionale Interuniversitario per le Telecomunicazioni, Pisa, Italy. antonio.malacarne@ircphonet.it
authors.forename: Antonio
authors.initials: A
authors.lastname: Malacarne
authors.forename: Emma
authors.initials: E
authors.lastname: Lazzeri
authors.forename: Valeria
authors.initials: V
authors.lastname: Vercesi
authors.forename: Mirco
authors.initials: M
authors.lastname: Scaffardi
authors.forename: Antonella
authors.initials: A
authors.lastname: Bogoni