A Contribution to Study the Effect of Multipath Coherent Crosstalk Due to Optical Network Nodes on DPSK Signals

Multipath coherent crosstalk, due to multiple replicas of the main signal in optical networks, is examined in terms of the potential impact on the performance of optical differential phase-shift keying signals. Analytical expressions are derived and presented for both the moment generating function...

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Bibliographic Details
Published in:IEEE photonics technology letters 2009-10, Vol.21 (20), p.1499-1501
Main Authors: Pires, J.J.O., Cancela, L.G.C.
Format: Article
Language:English
Subjects:
Coherence
Crosstalk
Decision analysis
Delay
Differential phase-shift keying (DPSK)
Differential quadrature phase shift keying
Error analysis
Error probability
Exact solutions
in-band crosstalk
Mathematical analysis
multipath coherent crosstalk
Optical attenuators
Optical communication
Optical crosstalk
Optical fiber networks
Optical filters
Optical interferometry
Optical network units
optical networks
Optical receivers
Signal to noise ratio
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Description
Summary:Multipath coherent crosstalk, due to multiple replicas of the main signal in optical networks, is examined in terms of the potential impact on the performance of optical differential phase-shift keying signals. Analytical expressions are derived and presented for both the moment generating function of the decision variable and the average error probability. A detailed comparison with incoherent crosstalk is also performed. Using symbol-conditioned analysis for this crosstalk, it is shown that for low optical signal-to-noise ratio penalties, the coherent crosstalk is more damaging than the incoherent one.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2009.2028582