DocumentCode :
1134753
Title :
The performance of optical phase-locked loops in the presence of nonnegligible loop propagation delay
Author :
Grant, M.A. ; Michie, W.C. ; Fletcher, M.J.
Author_Institution :
British Aerospace plc, Space and Communication Division, Stevenage, Hertfordshire, UK
Volume :
5
Issue :
4
fYear :
1987
fDate :
4/1/1987 12:00:00 AM
Firstpage :
592
Lastpage :
597
Abstract :
The optical phase-locked loop is analyzed taking into account shot noise, phase noise, and loop propagation delay. The degradation of loop phase error due to propagation delay is evaluated in terms of the delay bandwidth product 
. This product was found to have a maximum value of 0.736 for absolute loop stability. The resulting effect on a Costas loop system optimized for zero time delay is discussed. It is found that in order to maintain a 10-9BER system performance with 
A/W, 
dBm, and a 1-MHz beat linewidth, the delay time must be kept below 1.8 ns. If the beat linewidth increases to 15 MHz this figure drops to 0.12 ns.
. This product was found to have a maximum value of 0.736 for absolute loop stability. The resulting effect on a Costas loop system optimized for zero time delay is discussed. It is found that in order to maintain a 10-9BER system performance with A/W, dBm, and a 1-MHz beat linewidth, the delay time must be kept below 1.8 ns. If the beat linewidth increases to 15 MHz this figure drops to 0.12 ns.Keywords :
Costas loops; Delay effects; Optical receivers; Bandwidth; Bit error rate; Degradation; Delay effects; Optical noise; Phase locked loops; Phase noise; Propagation delay; Stability; System performance;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.1987.1075532
Filename :
1075532
Link To Document :
