Transcript No Slide Title

PERFORMANCE STUDIES OF
COMMUNICATION SYSTEMS AND NETWORKS
INCORPORATING NON-LINEAR APPLICATIONS
OF SEMICONDUCTOR OPTICAL AMPLIFIERS
Mário M. Freire
Assessment of Transmission
Performance in WDM Networks with
SOA-based Wavelength Converters
Performance of Dispersion Supported
Transmission (DST) Systems with
Chirp Reduction in SOAs
Modelling and simulation methodology:
• Semi-analytical method;
• Gaussian approximation.
Device modelling under research include:
• Wavelength converters based on XGM and
XPM in SOAs (bulk and MQW type);
• Several multiplexing/demultiplexing
technologies.
Block diagram of the simulated 20 Gbit/s
DST system
DRIVER
M QW
Assessment of Blocking Performance
in WDM Networks
EDFA
PPG
2 7-1 bits
SMF
EDFA
PIN PD
AMP
The following topologies are considered:
• Unidirectional and bi-directional rings;
• Chordal ring;
• Mesh-torus and hypercube.
LPF
Blocking gain due to an increase of the node
degree from 3 (chordal ring with 100 nodes)
to 4 (mesh-torus with 100 nodes).
Receiver sensitivity for DST at 20 Gbit/s
versus fibre length assuming that an EDFA or
a SOA is used as a booster amplifier
1.0E+09
DST (EDFA)
DST (SOA, 20 dB)
DST (SOA, 25 dB)
-10
-15
Node degree gain
Receiver sensitivity [dBm]
-5
-20
-25
chordal ring network
w=3, F=8
w=3, F=16
w=N/4, F=8
w=N/4, F=16
w=sqrt(N)+3, F=8
w=sqrt(N)+3, F=16
1.0E+06
with N=20 and w=3
19
0
1
2
18
3
17
4
16
5
15
1.0E+03
6
14
-30
7
13
8
12
-35
1.0E+00
0
10
20
30
40
50
Fibre length [km]
60
70
80
11
0.0
1.0
2.0
3.0
4.0
Load per node [Erlang]
5.0
10
9