Phase-sensitive amplification in a single bi-directional PPLN waveguide
; Puttnam, B. J.
Drummond, M. V.
; Szabo, A.
; Mazroa, D.
; Shinada, S.
; Wada, N.
Optics Express Vol. 21, Nº 19, pp. 22063 - 22069 , September, 2013.
ISSN (print): 1094-4087
Journal Impact Factor: 3,488 (in 2014)
Digital Object Identifier: 10.1364/OE.21.022063
We investigate phase-sensitive amplification (PSA) and phase
regeneration of a binary phase-shift keying (BPSK) signal using a single periodically poled lithium niobate (PPLN) waveguide. The PPLN is operated bi-directionally in order to simultaneously achieve phase-correlated signals and phase-sensitive (PS) operation. We use injectionlocking for carrier phase recovery and a lead zirconate titanate (PZT) fiber stretcher to correct path length deviations in the in-line phase regenerator. We observe a trade-off between high PS gain provided by high pumping power and stability of the device.