WP5 ORC/UKA joint experiment on OTDM to WDM Conversion Triumph Meeting 7 December 2007, Lisbon,...
-
Upload
jessie-green -
Category
Documents
-
view
218 -
download
2
Transcript of WP5 ORC/UKA joint experiment on OTDM to WDM Conversion Triumph Meeting 7 December 2007, Lisbon,...
WP5 WP5
ORC/UKA joint experiment on
OTDM to WDM Conversion
Triumph Meeting7 December 2007, Lisbon, Portugal
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 2
OutlineOutline
ORC/UKA joint experiment summary (5th November-14th November):
Experimental validation of the OTDM to WDM conversion using a NOLM switch at 128.1Gbit/s
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 3
Simulated Set-upSimulated Set-up
WDM filters
~80m SMF/ ~12mDCFPulse curving
DFB1
DFB2
DFB3
1
2
3
EAM
EDFA
EDFA
Clock Recovery
PC
HNLF
3x42.7Gbit/s WDM data
Signal
3x42.7GHz WDM Signal
Optical Delay
EDFA
128.1Gbit/s OTDM Signal
EAM wavelength dependence
Clock recovery unit not ready at 128.1Gbit/s
PC
PC
PC
Change of the OTDM wavelength due to the EDFA gain (closer to the shorter
WDM wavelength of ~3nm)
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 4
Experimental Set-upExperimental Set-upFWHM~1.5
ps
FWHM~6.5-7ps
Pin~20dBm
Pin~23dBm
FWHM~5.5ps
FWHM~6-6.5ps
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 5
Experimental Set-up Experimental Set-up (modified)(modified)
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 7
Spectral TracesSpectral Traces
All Channels ON
Wavelength[nm]
1520 1530 1540 1550 1560 1570
Pow
er[d
Bm
]-80
-60
-40
-20
0Demuxed all ON WDM3After the NOLM switchDemuxed all ON WDM2Demuxed all ON WDM1
Wavelength[nm]
1520 1530 1540 1550 1560 1570
Pow
er[d
Bm
]
-80
-60
-40
-20
0
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 8
Eye diagramsEye diagrams
WDM1 other OFF
WDM1 other ON
OTDM
WDM1
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 9
Eye diagramsEye diagrams
WDM2 other OFF
WDM2 other ON
OTDM
WDM2
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 10
Eye diagramsEye diagrams
WDM3 other OFF
WDM3 other ON
OTDM
WDM3
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 11
BER measurementsBER measurements
WDM Channels[nm]
1546 1548 1550 1552 1554 1556 1558
Sen
sitiv
ity [d
Bm
]
-32
-30
-28
-26
WDM Channels vs OTDM1 Other Channels OFF WDM Channels vs OTDM2 Other Channels OFF WDM Channels vs OTDM3 Other Channels OFF WDM Channels vs OTDM1 All Channels ON WDM Channels vs OTDM2 All Channels ON WDM Channels vs OTDM3 All Channels ON
Average Optical Power[dBm]
-38 -36 -34 -32 -30 -28 -26 -24
-log(
BE
R)
3
4
5
6
7
89
101112
WDM1 Other Channels OFFPlot 1 RegrWDM2 Other Channels OFFPlot 4 RegrWDM3 Other Channels OFFPlot 5 RegrWDM3 All Channels ON Plot 5 RegrWDM1 All Channels ON Plot 8 RegrWDM2 All Channels ONPlot 8 Regr
WDM3: Penalty~0.5dB
WDM2: Penalty~1.7dB
WDM1: Penalty~3.5dB
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 12
ConclusionsConclusions
We have experimentally demonstrated the OTDM to WDM conversion scheme using a NOLM switch at a repetition rate of 128.1Gbit/s
Error free operation was achieved for all the 3 WDM channels
During the validation of the scheme we met few issues mainly related to: Generation of the 3 WDM channels Polarisation dependence of the scheme
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 13
Siemens approachSiemens approach
Rui Morais et al. “OTDM-to-WDM Conversion based on Wavelength Conversion and Time Gating in a Single Optical Gate”, to be accepted in OFC 2008.
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 14
Siemens approachSiemens approach
<2dB
Rui Morais et al. “OTDM-to-WDM Conversion based on Wavelength Conversion and Time Gating in a Single Optical Gate”, to be accepted in OFC 2008.
TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 15
Comparisons with Siemens Comparisons with Siemens solutionsolution
ORC Solution+Faster switch and short time switching window (NOLM switch)
+Wavelength allocation is flexible
-Polarisation sensitive (non polarisation maintaining NOLM)
-2 independent sources for the OTDM signal and the WDM channels (synchronisation between them)
-More components (mainly polarisation controllers)
-EAM bandwidth and EAM wavelength dependence issues
Siemens Solution+Polarisation insensitive
+1 single source for the WDM channels
+Less components (mainly polarisation controllers)
-Relatively long time switching window at the converter (EAM-switching:5-6ps window)
-SPM broadening @128.1G to generate the other WDM channels (high input power levels)
-Wavelength allocation is not flexible
-The OTDM to WDM conversion does need synchronisation (EAM needs to be synchronised with the incoming signals)
-Are EAM bandwidth and EAM wavelength dependence issues?