WP5 ORC/UKA joint experiment on OTDM to WDM Conversion Triumph Meeting 7 December 2007, Lisbon, Portugal

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 2 Outline  ORC/UKA joint experiment summary (5 th November-14 th 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-up WDM filters ~80m SMF/ ~12mDCF Pulse curving DFB1 DFB2 DFB EAM 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 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-up FWHM~1.5ps FWHM~6.5-7ps P in ~20dBm P in ~23dBm FWHM~5.5ps FWHM~6-6.5ps

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 5 Experimental Set-up (modified)

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 6 Photos of the Set-up

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 7 Spectral Traces

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 8 Eye diagrams WDM1 other OFF WDM1 other ON OTDM WDM1

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 9 Eye diagrams WDM2 other OFF WDM2 other ON OTDM WDM2

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 10 Eye diagrams WDM3 other OFF WDM3 other ON OTDM WDM3

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 11 BER measurements WDM3: Penalty~0.5dB WDM2: Penalty~1.7dB WDM1: Penalty~3.5dB

TRIUMPH Meeting – 7 December 2007, Lisbon, Portugal 12 Conclusions  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 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 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 solution 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 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?