Open AccessAnti-Stokes contribution to the SBS Stokes gain in remotely seeded bidirectional NG-PON systems
Author(s) -
Zoran Vujičić,
B. Neto,
N.B. Pavlovic,
António Teixeira
Publication year - 2017
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.25.016182
Subject(s) - brillouin scattering , passive optical network , optics , stokes wave , wavelength division multiplexing , power budget , wavelength , seeding , multiplexing , physics , power (physics) , net gain , optical fiber , computer science , telecommunications , electric power system , breaking wave , wave propagation , bandwidth (computing) , quantum mechanics , thermodynamics , amplifier
We assess the importance of Stimulated Brillouin scattering (SBS) anti-Stokes wave on reflection tolerance in remotely seeded wavelength-division multiplexing passive optical networks (WDM PON). Experimental validation of the extended model for the externally seeded SBS is presented towards assessing the conditions in which the anti-Stokes contribution becomes relevant in the variant scenario of remotely carrier-seeded PON. We identify relevant operating conditions in which the latter can no longer be reliably neglected, and analyze the remote seed power budget implications of such contribution. Considering typical launch powers in PON systems we found that, even for seed launch powers below SBS threshold, non-optimized upstream (US) power spectral density may lead to a considerable anti-Stokes contribution to the SBS gain. In effect, in order to maintain a reference optical return loss (ORL) of 32 dB in such scenario, anti-Stokes wave contribution imposed rigorous remote seed power budget restrictions depending on fiber parameters.