July 6, 2005ICTON 2005, Barcelona, Spain1 Extending the reach of 10 GE at 1310 nm Josef VOJTĚCH, Miroslav KARÁSEK, Jan RADIL Motivation Configuration of tests Test results Conclusions

July 6, 2005ICTON 2005, Barcelona, Spain2 Extending the reach of 10 GE at 1310 nm Motivation Development of high-speed customer empowered fibre networks and availability of 10 GE LAN cards with 1310 nm transceivers stimulates the Need for interconnection of stand-alone or hardware accelerated PCs at 10 Gbit/s rate Advantage – zero chromatic dispersion of standard single mode fibres (SSMF) at 1310 nm in, the 1310 nm transceivers are much cheaper than the 1550 nm ones Disadvantage – loss of SSMF at 1310 nm is almost twice as high as at 1550 nm

July 6, 2005ICTON 2005, Barcelona, Spain3 Extending the reach of 10 GE at 1310 nm fibre amplifiers available at 1310 nm Praseodymium-doped fluoride fibre amplifiers (limited number of manufacturers, low saturated output power in comparison with EDFA, FiberLabs, FL8610-OB, P sat =16dBm, NF=5.5dB) Distributed amplification in the transmission fibre utilizing stimulated Raman scattering (Raman fibre amplifier (RFA), no pump LDs at 1250 nm, Raman fibre laser, IPG, P out max =2 W at 1250nm) Semiconductor optical amplifiers (InPhenix, IPSAD1301, P sat =10dBm, NF=7.5dB)

July 6, 2005ICTON 2005, Barcelona, Spain4 Extending the reach of 10 GE at 1310 nm PDFFA characteristics

July 6, 2005ICTON 2005, Barcelona, Spain5 Extending the reach of 10 GE at 1310 nm Modularity of SSMF spools available was 5, 10, 25, and 50 km Reliability of 10 GE transmission was verified using PING utility 10 7 of 1500 bytes long packets were transmitted and the number of successfully received packets was monitored The transmission was regarded to be successful when more than 99.95% of launched packets was received

July 6, 2005ICTON 2005, Barcelona, Spain6 Extending the reach of 10 GE at 1310 nm Test setup I PDFA/ SOA TXRXTX PDFA/ SOA RX PDFA TX PDFA RX PDFA TX PDFA RX Booster amplifier (BA) Preamplifier (PA) BA + in-line amplifier (IA) BA + PA

July 6, 2005ICTON 2005, Barcelona, Spain7 Extending the reach of 10 GE at 1310 nm Test setup II PDFA TX RFA RX PDFA TX RFA RX PDFA TX PDFA RX RFA BA + PA + RFA Two-stage BA + RFA BA + IA + RFA

July 6, 2005ICTON 2005, Barcelona, Spain8 Extending the reach of 10 GE at 1310 nm 10 GE transceiver XENPACK 10GBASE-LR Transceiver reach – nominal 10 km SSMF - laboratory verified 32 km SSMF TX P Tx out = -1,9 dBm λ = 1304,3 nm RX back-to-back sensitivity -17 dBm TX output spectrum and eye diagram

July 6, 2005ICTON 2005, Barcelona, Spain9 Extending the reach of 10 GE at 1310 nm PDFFA booster configuration Maximum span length 85 km of SSMF, loss α = 31,5 dB P Bo out = 14,4 dBm P Rx in = -18,1, OSNR = 42 dB Launched into the SSMF RX input power

July 6, 2005ICTON 2005, Barcelona, Spain10 Extending the reach of 10 GE at 1310 nm PDFFA as preamplifier Maximum span length 70 km, α=25.2 dB, OSNR=24 dB P PA in = dBm, P PA out = -2.4 dBm Span length with OBPF 75 km, α=27 dB, OSNR=23 dB P PA in = -28,9 dBm, FWHM of the OBPF 0.8 nm After PDFFA without OBPFAfter PDFFA with an OBPF

July 6, 2005ICTON 2005, Barcelona, Spain11 Extending the reach of 10 GE at 1310 nm PDFFA booster plus PDFFA preamplifier Maximum span length 100 km, α=37.2 dB, OSNR=28 dB P PA in = dBm P PA out = -3.7 dBm with OBPF, span length 120 km, α= 43.6 dB, OSNR=23 dB P PA in = dBm P Pa out = -6 dBm At the RX without OBPFAt the RX with an OBPF

July 6, 2005ICTON 2005, Barcelona, Spain12 Extending the reach of 10 GE at 1310 nm PDFFA booster plus PDFFA preamplifier Eye diagram after PA (100 km) Eye diagram after PA and OBPF (120 km) Eye diagram after PA (120 km)

July 6, 2005ICTON 2005, Barcelona, Spain13 Extending the reach of 10 GE at 1310 nm PDFFA booster and PDFF in-line Span length km, loss 37,2+19,2 dB P In in = -22,8 dBm, P In out = 0,7 dBm, P Rx = -17,6 dBm OSNR 29,4 dB Za in-line zelilovačemPřed přijímačem

July 6, 2005ICTON 2005, Barcelona, Spain14 Extending the reach of 10 GE at 1310 nm 10 GE two-stage booster a RFA Span length 135 km SSMF, loss = 54,1 dB P Bo out = 14,5 dBm, P RFA = 1,3 W P Rx in = -13,6, OSNR = 28,4 dB Za boostery Za filtrem Za RFA, bez filtru Před přijímačem

July 6, 2005ICTON 2005, Barcelona, Spain15 Extending the reach of 10 GE at 1310 nm 10 GE booster, in-line and RFA Span length km SSMF,loss 37,2+38 dB P Bo out = 12,1 dBm, P RFA = 1,35 W P Rx = -16 dBm, OSNR 24 dB Za RFA, bez filtru

July 6, 2005ICTON 2005, Barcelona, Spain16 Extending the reach of 10 GE at 1310 nm Comparison Application #10GE reach [km] No amplification Bo85 (60 SOA) 2 Pa70/75(+OF) (-/65 SOA) 3 Bo + Pa 100/120(+OF) 3 Bo + In *Bo + RFA135 5 Bo + In + RFA200

July 6, 2005ICTON 2005, Barcelona, Spain17 Extending the reach of 10 GE at 1310 nm Thank you for your attention!