title: All-optical half adder using an SOA and a PPLN waveguide for signal processing in optical networks.
abstract: We demonstrate an all-optical half adder for bit-wise addition of two serial data streams that simultaneously generates Sum and Carry outputs. The module performs the required XOR and AND operations using only two nonlinear optical elements. Difference Frequency Generation in a periodically poled lithium niobate waveguide serves as the AND gate and cross-gain modulation in a semiconductor optical amplifier is employed to generate the XOR output. Error free operation for RZ data is reported.
authors.affiliation: Dept. of EE-Systems, University of Southern California, 3740 McClintock Avenue, EEB #500, Los Angeles CA 90089, USA. skumar@usc.edu
authors.forename: Saurabh
authors.initials: S
authors.lastname: Kumar
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner
authors.forename: Deniz
authors.initials: D
authors.lastname: Gurkan
authors.forename: Krishnan R
authors.initials: KR
authors.lastname: Parameswaran
authors.forename: Martin M
authors.initials: MM
authors.lastname: Fejer