"ATLAS Experimental results on the 40 Gb/s transmission with wavelength conversion Francesco Matera Fondazione Ugo Bordoni,

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1 All-optical Terabit per second LAmbda Shifted transmission "ATLAS Experimental results on the 40 Gb/s transmission with wavelength conversion Francesco Matera Fondazione Ugo Bordoni, Subject: Nx40 and Mx80 Gbit/s transmission in networks encompassing all-optical wavelength converters More info: Düsseldorf, December 6, 2001

2 Consortium Partner Short number name Partner's name State P01 FUB Fondazione Ugo Bordoni I P02 PIR Pirelli Cavi e Sistemi I P03 UMS SAS United Monolithic Semiconductors F P04 OPT Opto Speed SA CH P05 TH CSF Thomson CSF Laboratoire Central de Recherches F P06 LJU University of Ljubljana SLO P07 AVE Instituto de Telecomunicações P P08 PAE University of Paderborn D P09 CPADOR Consorzio Padova Ricerche I P10 UCL University College of London UK P11 ISCTI Istituto Superiore delle Comunicazioni e delle Tecnologie dell Informazione I P12 OSI Optospeed Italia I Düsseldorf, December 6, 2001

3 Objectives Future Transport Networks based on WDM technique and wavelength conversion (WC) Study of the 40 Gb/s WC Demonstration of the nx40 and mx80 Gb/s transmission with WC in terrestrial links Fabrication of 40 Gb/s electronics devices (MUX- DEMUX) Theoretical investigation on nx40 Gb/s systems (mx80 Gb/s) and optical networks Düsseldorf, December 6, 2001

4 Technical Approach Comparison of three different all-optical lambda conversion techniques: SOA, PPNL, MQW 4x40 Gb/s with WC over a 500 km G.652 link 4x40 Gb/s with WC over a 500 km G.655 link 2x80 Gb/s with WC over a 500 km G.655 link 40 Gb/s EMUX, 40 Gb/s receiver+edemux Simulation tools to investigate optical systems Traffic routing in networks based on 40 Gb/s Düsseldorf, December 6, 2001

5 Transmission schemes λ Line 1-4 λ 2-5 CDC ACDC AOWC CDC ACDC l=100 km repeated M times l=100 km repeated N times c MOD 40 Gb/s 40 Gbit/s FRONT END DEMUX 1 : 4 10 Gbit/s DATA Transmitter EMUX 40 Gbit/s CLOCK REC. 10 GHz CLOCK 10 Gb/s Receiver Düsseldorf, December 6, 2001

6 Dispersion management schemes Post compensation Post compensation + prechirp All compensation at the end DCU dispersion compensating unit: fibre grating or dispersion compensating fibre Düsseldorf, December 6, 2001

7 List of the experiments Single-channel 40 Gb/s OTDM over 500 km (La=100km), G.652, G.655 Single-channel 40 Gb/s OTDM over 500 km G.655 (La=100km) with PPLN WC 4x40 Gb/s with EMUX/ODEMUX over 500 km G.655 link 4x40 Gb/s with EMUX/ODEMUX over 500 km G.655 link with SOA WC 4x40 Gb/s with EMUX/ODEMUX over 500 km G.652 link with SOA WC Düsseldorf, December 6, 2001

8 40 Gb/s Electronics devices 40 Gb/s Monolitic InP receiver Photograph of Module 40 Gb/s, 5 ps pulses P in = 1 dbm λ = 1554 nm (PIR) 40 Gb/s EMUX 40 Gb/s DEMUX chip

9 40 Gb/s OTDM set up 10 GHz Pulse Stream 10 GHz Clock 40 Gbit/s Clock Recovery Optical Clock Source Electro-Optic Modulator 10 Gb/s Data stream Gb/s Fiber Bit Interleaver Electro- Absorption Modulator 10 GHz Pulse Stream Optical Amplifier Optical Band-Pass Filter Optical Attenuator 10 GHz Clock Output Pulse Pattern Generator 10 Gbit/s Pulse Stream 40 GHz Pulse Stream Error Detector Optical Fiber Electrical Line 10 Gb /s Demultplexed eye diagram

10 40 Gb/s OTDM set up

11 Comparison of DM techniques 1.E-04 1.E-04 1.E-05 Back to Back Compensation scheme (a) 1.E-05 Back to Back 1.E-06 1.E-07 Compensation scheme (b) Compensation scheme (c) 1.E-06 1.E-07 Compensation scheme (a) Compensation scheme (b) Compensation scheme (c) BER 1.E-08 BER 1.E-08 1.E-09 1.E-09 1.E-10 1.E-10 1.E-11 1.E-11 1.E Received Power (dbm) 1.E Received Power (dbm) 300 km of G km of G.655 a) post compensation, b) post compensation with prechirp, c) compensation at the end

12 40 Gb/s transmission over G E E E E-05 BER dbm/span BER bk to bk 500 km 2 dbm/span 1.00E E-07 BER 1.00E E E E km 1.00E E E Received Power (dbm)

13 Set-up for 40 Gb/s WC Pulse Pattern Generator Mode-locked fibre laser EOM BI EDFA Pol. Contr. ECL Pol. Contr. 3 db HP- EDFA PPLN-AOWC to fibre line or to BER-detection (back to back) pre-chirping EDFA 100Km FL Fibre EDFA DCF CR x5 EDFA EDFA 3 db EAM EDFA RX BERdetector

14 40 Gb/s WC with PPNL conversion efficiency/osnr [db] Pb133z (with filter) P f = 160mw (incident power) conversion efficiency OSNR (converted signal) OSNR (input signal) incident signal power [dbm]

15 40 Gb/s WC with PPNL 500 km were successfully demonstrated 500 km with WC 500 km w/0 WC Back-to-back

16 40 Gb/s WC with SOA input Converted signal (100 km amplifier spacing) After 100 km of G.655 fibre (100 km amplifier spacing) After 300 km of G.655 fibre (100 km amplifier spacing)

17 40 Gb/s WC with SOA 1,E-03 1,E-04 1,E-05 1,E-06 1,E km 18 db 200 km 20 db 100 km 21 db BTB 23.5 db BTB Pritel 23.5 db BTB Pritel 27 db BER 1,E-08 1,E-09 1,E-10 1,E-11 1,E-12 1,E Input power at the receiver (dbm)

18 40 Gb/s transmission over G E E E E-05 BER dbm/span BER bk to bk 500 km 2 dbm/span 1.00E E-07 BER 1.00E E E E km 1.00E E E Received Power (dbm)

19 4x40 Gb/s over 500 km G.655 Dl=200 GHz 4 x 40 Gb/s - ETDM TX nm nm nm coupler EAM NB PM OFA a<0.5 EAM LC OBA Transmission line nm 40 Gb/s DT NB AMP 20 GHz ck 4 1 l i 40 GHz ck x 2 10 Gb/s DT τ l i 20 GHz ck τ 2 Ck distribution 10 GHz ck τ 1 10 Gb/s PPG

20 4x40 Gb/s over 500 km G x 40 Gb/s - OTDM RX Transmission line OPA DEMUX OPA OPA BPF EAM BPF 10 Gb/s Rx 10 Gb/s ED 10 GHz 40 Gb/s ck recovery DWDM 200 GHz dielectric filter Transmission (db) nm ( db 1.1 nm ( db 1.8 nm ( nm ( wavelength (nm) No power penalty with respect to the unfiltered 40 Gb/s signal

21 4x40 Gb/s over 500 km G.655 Residual dispersion slope effect Eye diagrams after 500 km (DM with prechirp map, ch 2 optimized): nm nm nm nm Eye diagrams after per channel dedicated postcompensation:

22 4x40 Gb/s over 500 km G x 40 Gb/s ETDM TX-OTDM RX over 5x100 km G.655 BER 1.E-03 1.E-04 1.E-05 1.E-06 1.E-07 1.E-08 1.E-09 Ch 1 Ch 2 Ch 3 Ch 4 BTB Ch 2 (29.5 db OSNR) BTB Ch 2 (18 db OSNR) 1.E-10 1.E-11 1.E-12 1.E-13 1.E Received Power (dbm) less than 1 db power penalty after 500 km with 14 dbm/span (DM with optimum prechirp)

23 40 Gb/s SOA Polarisation independent WC λ λ 200 km demux mux 300 km 4 x 40 Gbit/s (or 2x80) λ 4 x 40 Gbit/s (or 2x80) (BER 10-9 ) AOWC polarisation insensitive

24 CONCLUSIONS 4x40 Gb/s transmission over 500 km Good results for 40 Gb/s wavelength conversion 500 km with PPNL, 300 km with SOA 40 Gb/s monolithic InP receiver, 40 Gb/s EMUX/DEMUX Prechirp permits optimum transmission, but good results also for all compensation at the end Future Optical transport networks can be based on nx40 Gb/s with WC!!

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