Please use this identifier to cite or link to this item: https://doi.org/10.1109/JLT.2012.2190975
Title: Symmetric 10-Gb/s WDM-PON using directly modulated lasers for downlink and RSOAs for uplink
Authors: Al-Qazwini, Z.
Kim, H. 
Keywords: Direct modulation
directly modulated laser (DML)
passive optical network (PON)
semiconductor optical amplifier
wavelength-division multiplexing (WDM)
Issue Date: 2012
Source: Al-Qazwini, Z.,Kim, H. (2012). Symmetric 10-Gb/s WDM-PON using directly modulated lasers for downlink and RSOAs for uplink. Journal of Lightwave Technology 30 (12) : 1891-1899. ScholarBank@NUS Repository. https://doi.org/10.1109/JLT.2012.2190975
Abstract: We demonstrate a cost-effective, 10-Gb/s full-duplex wavelength-division- multiplexed passive optical network over 20 km single-feeder fiber using a single light source per optical network unit (ONU). We exploit a directly modulated laser (DML) and a reflective semiconductor optical amplifier (RSOA) for downlink and uplink, respectively. In this system, a nonreturn-to-zero (NRZ) downstream signal is first frequency up-converted to around 20 GHz before being fed to a DML for downstream transmission. After transmission over the feeder fiber, a portion of the downstream signal is detected at the ONU and the other portion is fed to the RSOA as seed light. The RSOA is directly modulated by a 10-Gb/s NRZ signal for upstream transmission. To overcome the bandwidth limitation of the directly modulated RSOA, we employ an optical delay interferometer at the upstream receiver. The passive optical device acts as an optical equalizer and enables the 10-Gb/s upstream signal to be accommodated with a 1.3-GHz-bandwith RSOA. We investigate through experiment the crosstalk between the downstream and upstream signals as a function of the downstream subcarrier frequency. Also investigated in this paper is the nonlinear frequency mixing of the downstream and upstream signals in the RSOA. © 2012 IEEE.
Source Title: Journal of Lightwave Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/57574
ISSN: 07338724
DOI: 10.1109/JLT.2012.2190975
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

17
checked on Dec 13, 2017

WEB OF SCIENCETM
Citations

16
checked on Nov 6, 2017

Page view(s)

35
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.