DocumentCode
1128401
Title
Optical modulation depth improvement in SCM lightwave systems using a dissymmetrization scheme
Author
Pophillat, L.
Author_Institution
CNET, Lannion, France
Volume
6
Issue
6
fYear
1994
fDate
6/1/1994 12:00:00 AM
Firstpage
750
Lastpage
753
Abstract
A scheme is proposed that permits the increase of the rms optical modulation depth (OMD) in SCM lightwave systems, without correlative increase of clipping-induced nonlinear distortion. This scheme is based on the addition to the SCM signal of low-pass filtered pulses, produced in synchronism with the peaks of the SCM signal, in order to prevent the clipping occurring during these peaks. An experiment demonstrating the feasibility is described. An rms OMD improvement of 4 and 5 dB has been obtained for a SCM band of 200-800 and 200-600 MHz, respectively.<>
Keywords
optical links; optical modulation; subcarrier multiplexing; 200 to 800 MHz; SCM band; SCM lightwave systems; SCM signal; clipping-induced nonlinear distortion; dissymmetrization scheme; low-pass filtered pulses; optical modulation depth improvement; rms OMD improvement; rms optical modulation depth; synchronism; Digital modulation; Frequency modulation; Low pass filters; Nonlinear distortion; Optical fibers; Optical filters; Optical modulation; Optical noise; Optical pulses; Optical transmitters;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/68.300183
Filename
300183
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