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TRANSCRIPT
ClariPhy Confidential
200G Single-Wavelength Transmission
for Metro and Superchannel Applications
Dr. Paul Voois Cofounder & Chief Strategy Officer
ECOC 2013 Market Focus
Session 2 – High Speed Optical Transmission
Outline
• Background • 200G Technology and Applications • Extension to Long Haul Networks • Conclusion
September 22, 2013 2 ECOC 2013 Market Focus
Background
• 100G QPSK coherent is technology of choice for long haul networks
• Operators are demanding coherent solutions for metro networks – Key benefits: Ease of
deployment, flexibility, scalability – Key challenge: cost vs. 10G
• Several approaches being proposed for lowering cost: CFP, integrated photonics, etc.
• 200G 16QAM is a compelling solution, achieving double the capacity at nearly half the cost per bit of 100G QPSK
September 22, 2013 3 ECOC 2013 Market Focus
- 20 40 60 80
100 120 140 160 180
CY11 CY12 CY13 CY14 CY15 CY16 CY17
Port
s (K)
100G Coherent Ports
Source: Infonetics
200G 16QAM Technology & Applications
September 22, 2013 4 ECOC 2013 Market Focus
200G DP-16QAM Modulation
Double the data rate at the same channel spacing
September 22, 2013 5 ECOC 2013 Market Focus
DP-16QAM
DP- QPSK
DP- 16QAM
Constellation Points 4 16
Bits per DP Symbol 4 8
Symbol Rate 32GBaud 32GBaud
Data Rate 128Gb/s 256Gb/s
Constellation diagrams from 32GBaud transmission using ClariPhy’s DAC and optical reference design
DP-QPSK
Applications
September 22, 2013 6 ECOC 2013 Market Focus
Optics λ1
Analog
CAUI
4x100G Muxponder
200GCoherent
ASIC
CFP 100GE
Client
CFP 100GE
Client
CAUI
Optics λ2
Analog
CAUI
200GCoherent
ASIC
CFP 100GE
Client
CFP 100GE
Client
CAUI
• Switching, routing, transport
• 4 x 100G Ethernet/OTU4 Muxponder
• 400GE transponder
• P-OTP line card
Optics λ1
Analog
OTL4.x
OTNProcessor
400G P-OTP Line Card
200GCoherent
ASIC
200GNPU w/Fabric
Interface
Back
plan
e
Optics λ2
Analog
OTNProcessor
200GCoherent
ASIC
200GNPU w/Fabric
Interface
OTL4.x
OTL4.x
OTL4.x
Superchannels
• With effective Nyquist shaping (requires high-resolution DAC), superchannels based on 200G DP-16QAM can achieve – 200G @ 37.5GHz grid
– 400G @ 75 GHz grid
– 1T @ 187.5GHz grid
• 2.7x the spectral efficiency of today’s 100G DP-QPSK on 50GHz grid
September 22, 2013 7 ECOC 2013 Market Focus
Source: Lightwave
Single-Chip 200G DP-16QAM ASIC
Key Requirements
• High resolution ADC, DAC
• OTN/Ethernet framer / mapper / mux
• High gain (SD) FEC
• Advanced carrier phase estimation
September 22, 2013 8 ECOC 2013 Market Focus
Image Removed
Component Ecosystem
200G ecosystem is maturing:
– Proven optical components
– Coherent ASICs
– Compatibility with existing networks demonstrated in field trials
200G deployments will ramp in 2014
September 22, 2013 9 ECOC 2013 Market Focus
ClariPhy’s 200G Coherent Optical Reference Design (Announced at ECOC 2013)
Image Removed
Pros and Cons of 200G 16QAM (Relative to 100G QPSK)
• Pros – Works on same network, same DWDM grid – Same optics – Double the fiber capacity – Half the cost per Gb/s – ~40% less power per Gb/s
• Cons – ~6.5dB higher (worse) OSNR sensitivity – More susceptible to DWDM nonlinearity – <1000km reach with today’s technology
September 22, 2013 10 ECOC 2013 Market Focus
Extension to Long Haul
September 22, 2013 11 ECOC 2013 Market Focus
Tradeoffs
• Fundamental tradeoff in coherent optical transmission is – Spectral efficiency versus OSNR (Reach)
• For example a single wavelength 200G system could use the following modulation & symbol rate: – DP-QPSK @ 64GBaud (75GHz) – Long Haul (>3000km)
– DP-8QAM @ 43GBaud (50GHz) – Long Haul/Metro (~1500km)
– DP-16QAM @ 32GBaud (37.5GHz) – Metro (~800km)
• However, higher symbol rates (>32GBaud) require next generation (higher bandwidth) optical component and ADC/DAC technologies
September 22, 2013 12 ECOC 2013 Market Focus
Today’s Systems vs. Channel Capacity Channel Capacity vs. OSNR
Chan
nel C
apac
ity [G
b/s]
OSNR over 0.1nm [dB]
Channel Width=37.5GHz
Channel Width=100GHz
Channel Width=50GHz
SNRCWOSNR
=
5.122/
)1(log2 2 SNRCWC +=
Assumptions
•Dual Polarization •White, Gaussian noise •Channel Width (CW) is equal
to the DWDM grid channel spacing
•Baseband bandwidth is ½ CW
9dB
9dB
Typical operating points of current technology. Note gaps to channel capacity.
September 22, 2013 ECOC 2013 Market Focus 13
Potential for Future Enhancements
• Gaps to capacity create an opportunity for improvement, which could be exploited by one or more of the following techniques: – Improved FEC
– Iterative decoding
– Trellis coded modulation
• Or improve OSNR – Higher launch power (Requires nonlinear compensation and/or high
linearity fiber)
– Lower noise amplifiers
14 September 22, 2013 ECOC 2013 Market Focus
15
Example: State of the Art FEC for 100/200 Gb/s
September 22, 2013 ECOC 2013 Market Focus
Conclusion
• 200G DP-16QAM is a compelling solution for metro – 2x spectral efficiency and ~½ cost per bit
– Maturing ecosystem
– Will ramp in 2014
• Extending single-λ 200G (or higher) to long haul requires further innovation
September 22, 2013 16 ECOC 2013 Market Focus
ClariPhy Confidential
Thank You!