Performance Enhancement by Threshold Level Control of a Receiver in WDM-PON System with Manchester Coded Downstream and NRZ Upstream Re-Modulation

Bong Kyu KIM  Hwan Seok CHUNG  Sun Hyok CHANG  Sangjo PARK  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B   No.9   pp.2994-2997
Publication Date: 2008/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.9.2994
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fiber-Optic Transmission for Communications
Keyword: 
access network,  fiber-to-the-home (FTTH),  Manchester code,  optical re-modulation,  passive optical network (PON),  optical fiber communications,  

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Summary: 
We propose and demonstrate a scheme enhancing the performance of optical access networks with Manchester coded downstream and re-modulated NRZ coded upstream. It is achieved by threshold level control of a limiting amplifier at a receiver, and the minimum sensitivity of upstream is significantly improved for the re-modulation scheme with 5 Gb/s Manchester coded downstream and 2.488 Gb/s NRZ upstream data rates.