title: Signal phase regeneration through multiple wave coherent addition enabled by hybrid optical phase squeezer.
abstract: A newly proposed concept, which is called hybrid optical phase squeezer (HOPS), achieves multi-level optical phase quantization through coherent addition of two (dual-wave scheme) or three (triple-wave scheme) optical waves exploiting optical parametric processes and electro-optic modulation. The triple-wave scheme enables signal phase regeneration free from phase-to-amplitude noise transfer, which is inevitable in the dual-wave scheme. By using HOPS in the dual-wave scheme, 3-fold phase-noise reduction was achieved for 24-Gb/s QPSK signals with a slight increase of amplitude noise. On the other hand, HOPS in the triple-wave scheme allowed phase regeneration of 12-Gb/s BPSK signal with a suppression of phase-to-amplitude noise transfer.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kurosu
authors.forename: Hung Nguyen
authors.initials: HN
authors.lastname: Tan
authors.forename: Karen
authors.initials: K
authors.lastname: Solis-Trapala
authors.forename: Shu
authors.initials: S
authors.lastname: Namiki