Innovations in Coherent Technologies for Subsea Transmission Systems

Transcription

1 Innovations in Coherent Technologies for Subsea Transmission Systems Anuj Malik Senior Product Manager Infinera

2 The Challenge of Operational Scale Demand 40% CAGR for 5 years = 5X Scaling Data Rate per Wavelength How is the industry approaching this problem of operational scale? Time Single wavelength operation seems to have run out of steam The best the industry can do today is just 200Gb/s per wavelength at significant cost to the reach Infinera

3 The Industry-Wide Response: Operational Scale Through Coherent Super-Channel Coherent Super-Channels Multiple coherent carriers Seen as a single unit of capacity Brought into service in one operational cycle Implemented on one chassis/line card Large Scale Photonic Integration >600 optical functions integrated >250 fiber connectors eliminated Power/space reduced Reliability enhanced PIC makes it practical Super-Channel Infinera

4 Next Generation of Coherent Technologies Infinera Photonics Large scale PIC Higher Order Modulation Advanced Digital Signal Processing Advanced Coherent Toolkit (ACT) + = Electronics FlexCoherent DSP/ASIC Increased Network Reach & Capacity with the Infinera ACT FCP PM-BPSK, PM-3QAM, PM-QPSK PM-8QAM, PM-16-QAM PIC Infinera optical engine Rx Based Tx (TX-DAC) & Rx Based Nyquist subcarriers SD-FEC Gain Sharing Matrix Enhanced Phase Shift Keying (ME-PSK) High Gain SD-FEC Flexible Channel Spacing

5 Innovation: Nyquist Subcarriers Super-channel carriersare split into Nyquist subcarriers Lower baud rate of subcarriers increases tolerance to nonlinearities such as XPM Increased tolerance to nonlinearities results in increased reach Infinera Super-channel carriers 37.5 GHz 35 GHz 35 GHz Super-channel with subcarriers Non Linear Tolerance NLT Q Value Increased overall fiber capacity and reach X Y Subcarrier Single Carrier B A Baud Rate With Subcarriers Single Carrier Launch Power

6 Innovation: SD-FEC Gain Sharing Q Factor Strong Channel Commissioning level [CL] Q Factor Strong Channel Both channels now exceed CL CL Weak Channel Launch Power Might be forced to run this channel in BPSK vs 3QAM or QPSK Weak Channel Launch Power Mitigates nonlinearities Enables use of higher order modulation format Increased overall fiber capacity and reach Infinera

7 Other Tools in the Infinera ACT Q Value ME-PSK PM-BPSK Launch Power SD-FEC Matrix Enhanced - Phase Shift Keying (ME-PSK) - Enhancement to PM-BPSK (for subsea reach) - Enhanced coding techniques w/advanced constellation - Increased channel gain over PM-BPSK High Gain SD-FEC: Advanced algorithm for optimized SD-FEC gain, low latency or higher optical reach Flexible channel spacing: Granular spatial tuning - Applicable to carriers within, fraction or entire super-channel - Reduced impact of non-linear effects (XPM) Maximizing available spectrum and boosting fiber capacity Infinera

8 Validating Key Next Gen Coherent Super-channel Technologies Telstra Endeavour subsea cable 9000km fiber link -Sydney to Hawaii Trial results validated Infinera s Advanced Coherent Toolkit (ACT) for super-channels The flexibility of PIC-based super-channels has proven to be a major advantage in subsea operations, and the addition of next generation coherent processing provides an important capacity boost. These capabilities see us continue to exceed the demands of our customers, and provide exceptional service levels across the Telstra Global Network and North American region. Andy Lumsden, Head of Network Services, Telstra Global Enterprise and Services Infinera

9 The Next Generation of Coherent Super-channels Infinera Advanced Coherent Toolkit (ACT) delivers next generation of coherent super-channels for enhanced capacity and reach in subsea and terrestrial networks Telstra Endeavour subsea cable trial successfully validates the Infinera ACT Large-scale PIC + FlexCoherent DSP/ASIC Cutting-edge photonics and electronics power the Infinera ACT Infinera