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Journal Article Improving Upstream Transmission Performance Using a Receiver with Decision Threshold Level Adjustment in a loopback WDM-PON
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Authors
Seung-Hyun Cho, Sang-Soo Lee, Dong-Wook Shin
Issue Date
2010-06
Citation
Optical Fiber Technology, v.16, no.3, pp.129-134
ISSN
1068-5200
Publisher
Elsevier
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1016/j.yofte.2010.01.004
Abstract
We have experimentally demonstrated that the use of an optical receiver with decision threshold level adjustment (DTLA) improved the performance of an upstream transmission in reflective semiconductor optical amplifier (RSOA)-based loopback wavelength division multiplexing-passive optical network (WDM-PON). Even though the extinction ratio (ER) of the downstream signal was as much as 9 dB and the injection power into the RSOA at the optical network unit was about -24 dBm, we successfully obtained error-free transmission results for the upstream signal through careful control of the decision threshold value in the optical receiver located at optical line terminal (OLT). Using an optical receiver with DTLA for upstream signal detection overcame significant obstacles related to the injection power into the RSOA and the ER of the downstream signal, which were previously considered limitations of the wavelength remodulation scheme. This technique is expected to provide flexibility for the optical link design in the practical deployment of a WDM-PON. © 2010 Elsevier Inc. All rights reserved.
KSP Keywords
Extinction Ratio(ER), Optical Line Terminal, Optical Network Units(ONU), Optical Receiver, Optical link, Semiconductor optical amplifiers(SOAs), Threshold Value, Upstream transmission, Wavelength-Division multiplexing(WDM), Wavelength-division-multiplexing passive optical network(WDMPON), decision threshold