Georgia Tech 100G Center
Georgia Tech 100G Center
Georgia Tech Industry-University 100G Networking Center
Stephen E Ralph
Prof of Electrical and Computer Engineering [email protected]
Tech 100G Center
Georgia
Tech 100G Center
School of Electrical and Computer Engineering
Georgia Tech 100G Networking Center
Mission
Develop a broad quantitative understanding of optical, electronic and
signaling interactions to enable the creation of design rules for 100Gbps
networks
Lead discovery of high-speed electronics, signal processing and optical
systems modeling to enable ultra high-speed communications
Produce sought after graduates with broad understanding and deep skills
Generate significant intellectual property
Enhance the economic prosperity of the state by attracting high
technology jobs
Methodology
An industry led communications and information technology
center that exploits a multidisciplinary team
High-speed Silicon based devices Signal processing
Tech 100G Center Tech 100G Center
Members
Founding members
Supporting members
New members
Nistica
Digital Lightwave
Tech 100G Center
Georgia
Tech 100G Center
School of Electrical and Computer Engineering
Georgia Tech Faculty
Prof. Stephen E Ralph
Director
Fiber Optics, Optoelectronic devices and signaling
Prof. Gee K Chang
Co-director
Fiber Optics, Optoelectronic devices
Prof. John Barry
Signaling
Prof. John Cressler
SiGe devices
Prof. Steve McLaughlin
Signaling
Tech 100G Center
Tech 100G Center
Georgia Tech 100G Center
Eight companies have joined forces with the Georgia Institute of
Technology to establish the 100 Gigabit-per-second optical
networking research center and testbed, the first academic
-industrial consortium of its kind in the world
Over $2.3 million in support has been secured for this facility by
the Center’s members and Georgia Tech
Academic and industry personnel to perform multidisciplinary
research in all aspects of 100G transmission
A variety of network architectures will be available each with
realistic impairments found in access networks, metro and long
haul links
Tech 100G Center
Georgia
Tech 100G Center
School of Electrical and Computer Engineering
Funding
$1.86M from 8 companies
$1,860k
$840k cash support $1020k in-kind support
Support spans two years of Phase I
Georgia Research Alliance
$300k
GRA is a state agency that invests in
Industry/University efforts that are strategically important to the Georgia economy
School of Electrical Computer Engineering
$50k
Senior Vice Provost of Research and Innovation
$50k
Tech 100G Center
Tech 100G Center
Phase I
40-100Gbps Electronics
AtoD converters
High-Throughput I/O for DSP engines Amplifiers and Clock and Data recovery Equalizers
Coherent optical links
Advanced modulation formats Polarization multiplexing
Advanced signal processing >50G
Equalization
Forward error correction Impairment mitigation
Shorter-reach high-speed optical links
<10km 100Gbps technologies FFTX
40 and 100G MMF solutions Active cables for data centers
Tech 100G Center
Georgia
Tech 100G Center
School of Electrical and Computer Engineering
100G Testbed Metrics
Simulations in conjunction with experiment
Performing analysis in multiple optical link simulator platforms
RSoft’s OptSim
OptiSystem’s OptiSystem
VPI photonics’s VPI TransmissionMaker
Isolate parameters of interest
OFDM modulation/demodulation PMD at 40Gbps
Industry/Academic/Government Support
IEEE 802.3b HSSG Phy Layer
100Gbps on 40km SMF 100Gbps on 10km SMF
Optical Internetworking Forum (OIF)
100G long distance DWDM TX framework/components FEC for 100G DP-QPSK long distance
40Gbps Optical Modulation Technologies Progressive Testing
40/43 Gbps OOK Point-to-Point 40/43 Gbps OOK Recirculating Loop 28 Gbaud DQPSK
PolMux
Input & Output OFDM Spectra: OptSim
Tech 100G Center
Tech 100G Center
Phase I Test Bed Schedule
Unamplified point-to-point
100 m OM3 and OM4 Multimode links; 850nm CWDM (30 September 2008)
10 km SMF (31 October 2008) 40G: CWDM and Serial links 100G: CWDM links
40km SMF (30 November 2008) 100G 4x25G @1300nm
Amplified DWDM point to point (October 31 2008)
7 Channel, 50GHz DWDM
Three 80km spans of low PMD fiber (higher PMD legacy available 2009)
Initially all EDFA amplifiers, addition of Raman 2
ndQtr 2009
Potential for 8+ spans with various dispersion and dispersion slope
Variety of ROADMs and tunable bandpass filtering
Amplified DWDM Loop (1
stQuarter 2009)
Simulate 3000+ km
Tech 100G Center
Georgia
Tech 100G Center
School of Electrical and Computer Engineering
Major Efforts
Phase based modulation formats
Coherent receivers
Polarization multiplexing
Sensitivity to dispersion map, fiber variation,
40-100Gbps Electronics
AtoD converters High-Throughput I/O for DSP engines Amplifiers and Clock and Data recovery Equalizers
Advanced signal processing >50G
Equalization
Forward error correction Impairment mitigation
Shorter-reach high-speed optical links
<10km 100Gbps technologies FFTX
40 and 100G MMF solutions Active cables for data centers
Tech 100G Center
Tech 100G Center
40/43 Gbps Point-to-Point: 10 Gbps Engineered Link
Network
50GHz channel spacing
Modern (TrueWave) and legacy(high PMD) fiber Cascaded ROADMS
Adjacent channels at 10G OOK Gain equalizers
Dynamic Spectral Shaping
Notes. INT: Interleaver
PC: Polarization Controller
DCM: Dispersion Compensation Module WSS: Wavelength Selective Switch VOA: Variable Optical Attenuator TBPF: Tunable Bandpass Filter CDR: Clock & Data Recovery
…. 40/43Gbps TX PIN/TIA 40G BERT Scope/OSA CDR VOA 80km SSMF EDFA DCM x3 10Gbps TX 10Gbps TX 10Gbps TX 10Gbps TX …... λ1 λ2 λ m λM -1 λ M .. INT INT PC PIN/TIA 10G BERT Scope/OSA CDR Power/ OSNR monitor Power/ OSNR monitor WSS Demux Demux 100GHz Mux 100GHz Mux TBPF
Tech 100G Center
Georgia
Tech 100G Center
School of Electrical and Computer Engineering
40/43 Gbps Recirculating Loop
Network
50GHz channel spacing
Modern (TrueWave) and legacy fiber Cascaded ROADMS
Adjacent channels at 10G OOK Gain equalizers
Dynamic Spectral Shaping
Notes. INT: Interleaver
PC: Polarization Controller
DCM: Dispersion Compensation Module WSS: Wavelength Selective Switch VOA: Variable Optical Attenuator TBPF: Tunable Bandpass Filter CRU: Clock Recovery Unit
…. 40/43Gbps TX PIN/TIA 40G BERT Scope/OSA CRU VOA 10Gbps TX 10Gbps TX 10Gbps TX 10Gbps TX …... λ1 λ2 λ m λM -1 λ M .. INT INT PC PIN/TIA 10G BERT Scope/OSA CRU Power/ OSNR monitor Power/ OSNR monitor Demux Demux 100GHz Mux 100GHz Mux 2x2 OS 80km SSMF DCM x3 EDFA WSS TBPF
Tech 100G Center
Tech 100G Center
Test bed overview
Network
50GHz channel spacing
Modern (TrueWave) and legacy fiber Cascaded ROADMS
Linear (pt to pt) and loop configurations Adjacent channels at 10G OOK
Gain equalizers
Dynamic Spectral Shaping
Modulation (10GSps, 28GSps, 40/43GSps)
Multilevel formats OOK (NRZ and RZ)
DPSK with >4 levels (NRZ and RZ) DQPSK (NRZ and RZ) OFDM inverse NRZ Polarization Mux Performance Monitoring OSNR
Constellation diagrams (real time) BER
Spectral Integrity
Coherent Detection
OSNR
Constellation diagrams (real time) Oversample AtoD converters Digital filters
Tech 100G Center
Georgia
Tech 100G Center
School of Electrical and Computer Engineering
40/43 Gbps Transmitters
40G PRBS Tunable DFB 40G IntMod EA 40Gbps NRZ_OOK TX Data 40G PRBS Tunable DFB 40G IntMod 40Gbps NRZ_OOK TX EA 40G PRBS Data Data Phase Shift 40Gbps RZ_OOK TX 40G PRBS Tunable DFB 40G IntMod EA 40G PRBS Data Data Phase Shift 40G Clock EA 40G IntMod Notes.EA: Electrical Amplifier MZM: Mach-Zehnder Modulator
40G IntMod: Similar construction to the MZM in the DPSK diagram, but without the π/2 phase shift
28G PRBS Tunable DFB 28Gbaud NRZ_DPSK TX EA 28G PRBS Data Data π/2 28G PRBS Tunable DFB 28Gbaud RZ_DQPSK TX EA 28G PRBS Data Data π/2 28G Clock EA 40G IntMod MZM Nested MZM
Tech 100G Center
Tech 100G Center
40/43 Gbps Receivers
Performance Monitoring
OSNR
Constellation diagrams (real time) BER
Spectral Integrity
Notes.
EA: Electrical Amplifier CRU: Clock Recovery Unit DI: Delay Interferometer BPD: Balanced PIN Photodiode
40Gbps RX (for OOK) EA 40G BERT Scope/OSA CRU PIN/TIA DI BPD
40Gbps RX with Balanced Receiver (for D(Q)PSK)
EA
40G BERT
Scope/OSA CRU