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Phase-sensitive amplification in a single bi-directional PPLN waveguide

Albuquerque, A. ; Puttnam, B. J. ; Drummond, M. V. ; Szabo, A. ; Mazroa, D. ; Shinada, S. ; Wada, N. ; Nogueira, R.N.

Optics Express Vol. 21, Nº 19, pp. 22063 - 22069 , September, 2013.

ISSN (print): 1094-4087
ISSN (online):

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.