ECOC Market Focus Linear Components Enabling Flexible Optical Networks. Sep 24, 2014 Lian Zhao Richard Ward

Transcription

1 ECOC Market Focus Components Enabling Flexible Optical Networks Sep 24, 2014 Lian Zhao Richard Ward

2 Firstly. 2

3 Network growth estimates pick one Video, smart phones, tablets, (cats), IoTs all add to the ever increasing network capacity requirements Sources: Cisco, Infinera + others 3

4 Per Channel Capacity and Component Baud Rate, LH <10G/channel: Intensity modulation with direct detection The Line rate and Component baud rate matched >100G/channel: Coherent systems implemented Enabled by DSP, modulation, polarization and carriers 4

5 MZ Modulator MZ Modulator Long Haul Optical Detection Methods Direct Detection served us well at 10G On Off Key (OOK) But chromatic dispersion (CD) and polarization mode dispersion (PMD) increases for 100G and above cause severe challenges MUX/ CMU DMUX /CDR TIA PD First gen Coherent Detection Precoder in Tx, decoder in Rx Preserves phase, polarization and amplitude (rx) information Phase Shift Keying (PSK) >20dB sensitivity improvements DSP MUX A D C Limiting TIA 90 o 90 o PBS LO 5

6 Integrated Coherent Receiver (ICR) Overview Optically mixes the incoming stream with a narrow linewidth LO Using orthogonal optical beam splitters, phase and polarization are preserved prior to mixing and amplification The balanced TIA Retains amplitude, phase and polarization information Balanced devices cancel the common mode noise components Differential outputs match current ADC requirements The Digital Signal Processor (DSP) compensates for Chromatic dispersion (CD) Polarization mode dispersion (PMD) Frequency and Phase offset Deskew Source: OIF 6

7 MZ Modulator MZ Modulator Coherent solutions: From 100G to 400G, and beyond MUX Limiting Tx DSP D A C DSP A D C TIA 90 o 90 o PBS LO Rx DSP A D C TIA 90 o 90 o PBS LO RxDSP with TIAs enabled the transition from 10G to 100G TxDSP with s now enables the 100G-400G+ generation 7

8 Benefits of TxDSP with a Higher order modulation for higher data rates A TX DSP enables Programmable modulation formats Nonlinearity pre-compensation for electrical/optical components Pulse/spectrum shaping Pre-compensate link for longer reach Spectral shaping for higher optical fiber capacity Courtesy : Ciena 8

9 Solutions Enabling SDN for Long Haul Networks require new flexibility for configuration, requiring: SDN for the control plane (software) DSP + components (hardware) Together, they form a reconfigurable platform solution 9

10 Industry First 32GBaud Coherent Solutions 3214SZ: Quad s 4 DAC 3214 MZ Modulator DSP Degree Hybrid Mixer BS LO Laser ADC Degree Hybrid Mixer PBS 3250: Dual TIAs 10

11 Industry First 45GBaud Coherent Solutions 400G Coherent TX/RX MZ Modulator DAC 4514 IN4514SZ Octal SPI Interface 45Gbaud 4 DSP 90 Degree Hybrid Mixer MZ Modulator PBS VOA IN4550TA Quad TIA SPI Interface 45Gbaud Degree Hybrid Mixer BS ADC 90 Degree Hybrid Mixer PBS VOA Degree Hybrid Mixer BS Inphi Proprietary and Confidential 11

12 Key Trends for Client and Datacenter Networking Higher Bandwidth for 100m to 40km: 100G => 200G => 400G => 1T Smaller Form Factor 100G Interfaces CFP : 400G 1RU 12-24W CFP2 : 800G 1RU 8-12W CFP4 : 1.6T 1RU 4-6W Source: Avago Higher baud rate components are required: 28G => 38G => 56G 4 => 2 => 1 QSFP28 : 3.2T 1RU 3.5W SFP28 : 4.8T 1RU 1.5W On Board Optics : 6.4T 1RU <1.5 W Higher density, lower cost, lower power NRZ => PAM Modulation Fewer reduces optical cost and assembly challenges PAM lowers size, cost, and power by shifting optical complexity to electronics 12

13 TIA and s Enable PAM Optical PAM (Pulse Amplitude Modulation) PAM4 Optical Signal 13

14 Summary Coherent technology has been a key enabler for 100G The majority of deploying 100G systems are Limiting drivers with TIAs today We see the conversion to both driver and TIA accelerating rapidly in the market, driven by flexibility demands solutions match Long Haul and Datacenter future needs We see Coherent technology taking us to 400G and beyond Thank you 14