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!