Title :
Spectral Efficiencies of Channel-Interleaved Bidirectional and Unidirectional Ultradense WDM for Metro Applications
Author :
Kim, Sang Yuep ; Seo, Kyung Hee ; Lee, Jae Seung
Abstract :
We measure spectral efficiencies of ultra-dense (UD) wavelength-division multiplexing (WDM) channels for metro applications. We change the channel spacing in 500-MHz step using a beat-frequency-locking method. Applying both a polarization control (PC) and a forward-error correction (FEC), we achieve spectral efficiencies as high as 1.54 and 0.91 b/s/Hz in back-to-back operations for channel-interleaved (CI) bidirectional and unidirectional UD-WDM, respectively. If we use the PC and the FEC separately for the CI-bidirectional UD-WDM, the PC enhances the spectral efficiency over the FEC by 4.6%-21.2% as the transmission distance is increased.
Keywords :
erbium; forward error correction; optical fibre amplifiers; optical fibre communication; polarisation; wavelength division multiplexing; Erbium-doped fiber amplifier; beat-frequency-locking method; channel-interleaved bidirectional ultradense WDM; forward-error correction; frequency 500 MHz; metro application; optical amplifier; optical fiber communication; optical polarization; polarization control; spectral efficiency measurement; unidirectional ultradense WDM; wavelength division multiplexing; Channel spacing; Forward error correction; Optical amplifiers; Optical fiber dispersion; Optical fibers; Optical polarization; Erbium-doped fiber amplifier; optical amplifiers; optical fiber communication; optical polarization; wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2180697
