Open AccessPhase-squeezing properties of non-degenerate PSAs using PPLN waveguides
Author(s) -
Benjamin J. Puttnam,
Dániel Mazroa,
Satoshi Shinada,
Naoya Wada
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.00b131
Subject(s) - optics , lithium niobate , brillouin scattering , phase (matter) , materials science , signal (programming language) , optical amplifier , phase modulation , attenuation , nonlinear optics , phase noise , optical fiber , laser , physics , computer science , quantum mechanics , programming language
We investigate the phase squeezing characteristics of non-degenerate phase-sensitive-amplifiers (PSAs) based on periodically-poled-lithium-niobate (PPLN) waveguides. We implement two PSA configurations with phase insensitive idler generation performed in both highly-non-linear-fiber (HNLF) and PPLN waveguides. In both cases we demonstrate regeneration of a noisy BPSK signal, despite net signal attenuation in the phase sensitive PPLN, and show that the level of phase squeezing varies with the phase sensitive dynamic range (PSDR). We observe that weak idler generation in the PPLN limits the achievable PSDR and that use of HNLF for idler generation leads to the largest PSDR. However, in phase regeneration measurements we observe that the pump phase modulation, required to overcome stimulated Brillouin scattering, adds significant amplitude noise, which increases with the PSDR.