Miroslav Karásek, Jan Radil, Josef Vojtěch
www.ces.net
Optical amplifiers in CzechLight and CESNET2
May 17 , 2005CEF Workshop
Praha, Czech Republic 2
Optical amplifiers in CzechLight and CESNET2 Outline
Motivations
Optical fibre amplifiers (EDFA, PDFA, Ramans)
Semiconductor optical amplifiers
Deployment of „home-made“ OAs
Conclusions
May 17 , 2005CEF Workshop
Praha, Czech Republic 3
Utilization of dark fibres – CEF networks (back to 1999)
Cost effective deployment of multigigabit lines (N x 1 GE, N x 10 GE)
Lack of optical equipment suitable for NRENs
National Research and Educational Networks (NRENs) rely on leased dark fibres and prefer to have no active components between the transmitter and the receiver
Repeaterless or Nothing-in-line (NIL) approach
Optical amplifiers in CzechLight and CESNET2 Motivations
May 17 , 2005CEF Workshop
Praha, Czech Republic 4
Optical kit composed from commercially available elements and modulesCommon and reliable elements + reliable design => cost effectivity & reliability & possibility of developmentCustomer based OFA modules – EDFA for 1550 nm, PDFA for 1310 nm (10 GE line cards for PC ), Raman modulesHigh power boosters, preamps, in-line amps…„Home made“ amplifiers - CzechLight amplifiers (CLA)
Optical amplifiers in CzechLight and CESNET2 Optical Fibre Amplifiers
May 17 , 2005CEF Workshop
Praha, Czech Republic 5
Redundant PSU from industry leading vendor (220 V AC, 48 V DC in progress)DC voltages, fan speeds, temperature are monitoredStandard micro ATX MB w/ low power & fanless CPURuns on flash disc (no vibration sensitive rotational parts)Powered from DC/DC converter (in case of PC failure amplifiers stays on)Interfaces: RS232, FastEthernet, USB, I2CExtensive management capabilities – console, LAN, GSM, Wi-Fi, BlueTooth, SSH, SNMP
Optical amplifiers in CzechLight and CESNET2 CzechLight Amplifiers Features
May 17 , 2005CEF Workshop
Praha, Czech Republic 6
Optical amplifiers in CzechLight and CESNET2 CzechLight Amplifiers Architecture
Fast Ethernet RS232C USB
MicroATX MainBoard
PSU
Alarm LEDs
PSU
OA Module 1 OA Module 2(optional)
Power & thermal management PCB
DC/DC
GSM
May 17 , 2005CEF Workshop
Praha, Czech Republic 7
Optical amplifiers in CzechLight and CESNET2 CzechLight Amplifiers
May 17 , 2005CEF Workshop
Praha, Czech Republic 8
Cost effective solutions, especially for 1310 nm windowEDFAs are more powerful and less noisy (but more expensive)But PDFAs are not so widespread and common, optical parameters (output powers and noise figures are not comparable with EDFAs) – SOAs can present an interesting solution10 GE line cards for PC (PCI-X, PCI-E) S2io (Neterion), Chelsio, Intel with fixed 1310 nm transceivers onlyThe only way to extend reach is to deploy amplifiers (10 km is not enough, even for MANs in the Czech Republic)
Optical amplifiers in CzechLight and CESNET2 Semiconductor Optical Amplifiers
May 17 , 2005CEF Workshop
Praha, Czech Republic 9
Optical amplifiers in CzechLight and CESNET2 Semiconductor Optical Amplifiers
May 17 , 2005CEF Workshop
Praha, Czech Republic 10
Optical amplifiers in CzechLight and CESNET2 SOAs versus FOAs
May 17 , 2005CEF Workshop
Praha, Czech Republic 11
Optical amplifiers in CzechLight and CESNET2 CLAs Deployment
Both in CESNET2 (production) and CzechLight (experimental and breakable) networksPraha – Hradec Králové (CESNET2 network) 150.4 km of G.652, 35.7 dB@1550nm NIL, OSA (one side amplification) w/ CLA, 1 GE Experimental since Dec 2004, fully in production
March 2005
May 17 , 2005CEF Workshop
Praha, Czech Republic 12
Optical amplifiers in CzechLight and CESNET2 CLAs Deployment
Praha – Hradec Králové (CESNET2 network) Optical spectrum analyzer measurements
Before preamp After preamp and filtering
May 17 , 2005CEF Workshop
Praha, Czech Republic 13
Optical amplifiers in CzechLight and CESNET2 CLAs Deployment
Praha – Brno (CzechLight network) 298 km, mixture of G.652/G.655+/G.655-, 67
dB@1550nm Not NIL solution, without Ramans but with one inline
CzechLight amplifier (2in1) Today 1 channel, 10 G SONET, DWDM transceivers, ready
for 8 (16 with high power boosters and inline amps) 10 G DWDM SONET/SDH/Ethernet channels!
The last week we‘ve started to experiment with DWDM MUX/DEMUXes, everything seems to be working fine
Deployment of (tuneable) FBGs and ROADMs is already planned
May 17 , 2005CEF Workshop
Praha, Czech Republic 14
Optical amplifiers in CzechLight and CESNET2 CLAs Deployment
A bit of History :-) Started with 302 km of mixture of G.652/G.655+
fibre spools, EDFAs and Ramans, 65 dB@1550nm - working fine
297 km testing fibre loops, in the ground, mixture of G.652/G.655+/G.655-, 66 dB@1550nm - working fine
The „true“ 298 km/67 dB line Praha – Brno was (and still is) sort of bewitched, the BER was too high for our NIL configuration with Ramans :- (
May 17 , 2005CEF Workshop
Praha, Czech Republic 15
Optical amplifiers in CzechLight and CESNET2 Conclusions
Development and deployment of new components (FBGs, wavelength and NRZ/RZ conversions, ROADMs, OOO equipment, TDM pumped Ramans,…)
Especially important (in our opinion) for academic and research community
New solutions for all-optical signal processing
May 17 , 2005CEF Workshop
Praha, Czech Republic 16
Optical amplifiers in CzechLight and CESNET2 Acknowledgement
Lada Altmanová, Jan Gruntorád, Stanislav Šíma, Martin Míchal
May 17 , 2005CEF Workshop
Praha, Czech Republic 17
[1] Karásek, M. - Peterka, P. - Radil, J. , „202 km repeaterless transmission of 2 x 10 GE plus 2 x 1 GE channels over standard single mode fibre. “, In: Optics Communications 235, pp. 269-274., 2004.
[2] Radil, J. - Karásek, M., „Experiments with 10 GE long-haul transmissions in academic and research networks.“, In: I2 member meeting, Arlington, VA, 2004.
[3] Altmanová L., Radil J., Šíma S., Vojtěch J., „CzechLight testbed“. In: GN2 APM meeting, Praha, Czech Republic, February 2005.
[4] Vojtěch J., „CzechLight and CzechLight amplifiers“. In: 17th TF-NGN meeting, Zurych, Switzerland, April 2005.
Optical amplifiers in CzechLight and CESNET2 References
May 17 , 2005CEF Workshop
Praha, Czech Republic 18
Optical amplifiers in CzechLight and CESNET2
Thank you for your attention!
Top Related