Photonics for the Coherent CFP2-ACO Unlocking 100G and 200G for the Metro

Transcription

1 Photonics for the Coherent CFP2-ACO Unlocking 100G and 200G for the Metro Brandon Collings JDSU September, 2014 ECOC This communication contains forward looking product development plans based on our current expectations. The actual products and/or product functionality and timing of the product and/or product functionality releases could change materially. Production released products will be priced separately.

2 100G and 200G Metro Application and Device Requirements Application Requirement Low Cost Pluggable and Compact 100G DP-QPSK 200G DP-16QAM Device Requirement Integrated manufacturable technology Compact and power efficiency Dual polarization phase modulation 32Gbaud operation Narrow linewidth, compact tunable laser Nyquist modulation Compatible with CD/C Networks High Tx_OSNR Self-filtering coherent receiver Flex spectrum and rapid tuning Conventional Tx Output Power Overcome high modulation & device loss 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 2

3 100G and 200G Metro Solutions Coherent CFP2-ACO Pluggable Transceiver Primary metro 100G solution Pluggable is universal within market - ASIC located on motherboard - Compatible with everyone s ASIC - Benefits from high volume Supports both 100G and 200G Pay-as-you-grow Non-pluggable Linecard Based Solutions itxa and icr components Preserves faceplate space Leverages compact cost effective technologies icr itxa 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 3

4 100G and 200G Metro Application and Device Requirements Application Requirement Low Cost Pluggable and Compact 100G DP-QPSK 200G DP-16QAM Device Requirement Integrated manufacturable technology Compact and power efficiency Dual polarization phase modulation 32Gbaud operation Narrow linewidth, compact tunable laser Nyquist modulation Compatible with CD/C Networks High Tx_OSNR Self-filtering coherent receiver Flex spectrum and rapid tuning Conventional Tx Output Power Overcome high modulation & device loss 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 4

5 Addressing the Technical Challenges Device Requirement Integrated manufacturable technology Integrated InP Technology Compact and power efficiency Dual polarization phase modulation 32Gbaud operation Narrow linewidth, compact tunable laser Nyquist modulation High Tx_OSNR Self-filtering coherent receiver Flex spectrum and rapid tuning Overcome high modulation & device loss High Power and Power Efficiency InP Monolithic Integration Tunable Laser SOA Modulators 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 5

6 Transmitter Power Efficiency is Critical Tunable Laser Pol MUX SOA Modulators Flex Wavelocker Tx output (~0dBm) LO output (~12dBm) 1. Minimize all excess device losses Monolithic design eliminates chip-chip or chip-fiber-chip losses More loss compensation means higher power dissipation 2. Distributed, integrated moderate-power SOA s compensate losses Efficient with respect to power dissipation 3. Post-modulator optical amplification must be avoided Requires cost, size and precious power dissipation Compromises Tx_OSNR 9-12dB modulation loss (Nyquist 16QAM) Need >14 dbm per polarization to overcome modulation, device and coupling loss 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 6

7 Need: 32Gbaud Modulation (25GHz bandwidth) Optimize waveguide, quantum wells and RF electrode geometry Device length Ridge waveguide width, depth and confinement vs overlap with RF electrode Crystallographic orientation Core processing technology reused for 100G LR-4, CWDM4 and other 100G interfaces 30Gb/s Electrical Input 30Gb/s Optical Waveguide Construction Waveguide N-contact layer 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 7

8 Phase [deg] Transmission [db] Need: Linear Phase-only Optical Modulation InP has absorption & phase response Phase-only modulation achieved with proper QW design and crystal orientation Minimal amplitude modulation Minimal Absorption Operating region modulate Linear Phase Response Bias Voltage 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 8

9 Linewidth (khz) Need: Narrow Linewidth Laser with Rapid Wavelength Tuning <300kHz linewidth needed for 16-QAM All solid state design preferred for compactness and robustness Sub-100kHz linewidth achieved through shifting from current to thermal laser tuning control in SG-DBR laser SOA Front Mirror Gain Phase Back Mirror Thin film heater electrode SG-DBR Sampled gratings Ridge waveguide Thermal isolation kHz < 100kHz Linewidth Frequency (THz) M. Larson et.al, OFC 2013, paper OTh3I.4 < 50ms tuning 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 9

10 SMSR (db) Need: High Tx_OSNR for Next-Gen CD/C Networks Compatibility Need >45dB Tx_OSNR for passive filterless multiplexing Cumulative OSNR after 16x1 passive mux: 45dB 12dB = 33dB High SMSR requires suppression of non-operating laser cavity modes Desirable to avoid post-modulator optical amplification >50dB SMSR dB Frequency (THz) SMSR 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 10

11 Need: Flex Spectrum Laser Wavelength Tuning Requires sub-1 GHz granularity tuning Enables optimized superchannel sub-carrier frequency spacing Maintain proven etalon-based wavelocker approach Calibrate continuously across full C-band Optical Frequency [THz] 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 11

12 Need: Compact Coherent Receiver High Relative-Index PLC foundation for coherent mixer Low-loss fiber coupling for high Rx sensitivity Integrated power monitoring and VOA functionality Compact footprint High volume, low cost manufacturing Reliable and robust proven technology Wavelength insensitive 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 12

13 Assembling the Coherent CFP2 Transmitter + LO Coherent CFP2 Coherent Receiver 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 13

14 Metro Summary Coherent CFP2 will be the primary solution for metro 100/200G Compatible with all ASICs to maximize product volumes Multiple technology challenges have been overcome 25GHz device bandwidth Narrow linewidth and flex spectrum tunability Linear phase modulation and Nyquist 16-QAM Conventional output power with high modulation loss High Tx_OSNR Compact form factor and low power dissipation Monolithic InP transmitter design provides performance and power efficiency 2014 JDS Uniphase Corporation JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 14

15 Thank You!