Open AccessA long-reach ultra-dense 10 Gbit/s WDM-PON using a digital coherent receiver
Author(s) -
Domaniç Lavery,
Maria Ionescu,
Sergejs Makovejs,
E. Torrengo,
Seb J. Savory
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.025855
Subject(s) - optics , wavelength division multiplexing , phase shift keying , polarization division multiplexing , channel spacing , multiplexing , physics , transmission (telecommunications) , bit error rate , channel (broadcasting) , wavelength , telecommunications , computer science
We investigate the impact of channel spacing and nonlinear transmission over 120 km of standard single mode fiber for a 10 Gbit/s long-reach wavelength division multiplexed passive optical network (WDM-PON). We employed polarization division multiplexed quadrature phase shift keying (PDM-QPSK), which allowed data transmission at 3.125 GBaud, including a 25% overhead for forward error correction. To receive this spectrally efficient modulation format, a digital coherent receiver was employed, allowing for both frequency selectivity and an increased sensitivity of -45 dBm (25 photons/bit).We investigated a channel spacing as low as 5 GHz, for which the loss budget was 48.6 dB, increasing to 54.0 dB for a 50 GHz grid.