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학술지 Improving Upstream Transmission Performance Using a Receiver with Decision Threshold Level Adjustment in a loopback WDM-PON
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저자
조승현, 이상수, 신동욱
발행일
201006
출처
Optical Fiber Technology, v.16 no.3, pp.129-134
ISSN
1068-5200
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.yofte.2010.01.004
협약과제
09MH1100, 메트로-액세스 전광 통합망 기술개발, 이상수
초록
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.
키워드
Decision threshold level adjustment, Reflective semiconductor optical amplifier, Remodulation scheme, Wavelength division multiplexing-passive optical network
KSP 제안 키워드
Error-free transmission, Link design, Optical line terminal(OLT), Optical network unit(ONU), Optical receiver, Reflective Semiconductor Optical Amplifier, Semiconductor optical amplifiers(SOAs), Threshold Value, Upstream transmission, Wavelength Division Multiplexing(WDM), Wavelength-division-multiplexing passive optical network(WDM-PON)