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Optical Fiber Communications Technology, Systems and Circuits Overview

Optical Fiber Communications Technology, Systems and Circuits Overview. Lecturer: Ali Fotowat Ahmady Feb 7, 2012 Tabriz University Photonics Conference. Agenda. Why Optical Communications? Broadband Access Technologies FTTx PON Technology GPON: System Overview and Protocol Stack

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Optical Fiber Communications Technology, Systems and Circuits Overview

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  1. Optical Fiber CommunicationsTechnology, Systems and Circuits Overview Lecturer: Ali Fotowat Ahmady Feb 7, 2012 Tabriz University Photonics Conference Sharif University of Technology

  2. Agenda • Why Optical Communications? • Broadband Access Technologies • FTTx PON Technology • GPON: System Overview and Protocol Stack • Optical Transceivers • CMOS Optoelectronic Receiver • CMOS CDR and DEMUX IC Sharif University of Technology

  3. Traffic Growth and Power Consumption Sharif University of Technology

  4. Limitations of Electrical LinksMarket Transition from Electrical to Optical Sharif University of Technology

  5. Progress in Optical Communication Technology (2 of 2) Sharif University of Technology

  6. Trend of Broadband Access Studies 2010.5 40/100GbE 100G IEEE802.3 STD Next target NG-PON2 (WDM TDM Hybrid PON) 10GbE 2009.9 P-P 10G 10G-EPON NG-PON1 P-MP GbE G-PON 1G Data speed (bps) GE-PON max. (+ SCM-PON for video distribution) B-PON 100M 100BaseT min. P-P: Point to Point P-MP: Point to Multipoint SCM: Subcarrier Modulation NGA: Next Generation Access 10M ADSL STM-PON FTTH 20 mill. users 10 mill. 1995 2015 Year 2000 2005 2010 2020 Sharif University of Technology

  7. Access: Fiber To The X (FTTx) Operation System Passive Optical Splitter Service Node Internet FTTH ONT Optical Fiber Leased Line FTTB ONT VOIP OLT ONU NT FTTC PSTN Twisted Pair ONU NT Video FTTCab xDSL PON System FTTH : Fiber To The Home FTTB : Fiber To The Building FTTC: Fiber To The Curb FTTCab : Fiber To The Cabinet Sharif University of Technology

  8. 1490nm 1310nm 1550nm FTTX PON: The Critical Components ONT Access Node OLT Tx E1/DS1 NB WDM Coupler CC Splitter (and/or) Optical Fiber Cable BB GbE Rx STMn/OCn 1550nm Rx 1490nm Rx Tx 1310nm Optical Amplifier Video TX ONU Up to 60 km* physical reach (* with G.984.6 Reach Extender) Sharif University of Technology

  9. xPON Comparison Sharif University of Technology

  10. ONT ONT nxT1/E1 ONT E1 PON Applications 1. FTTP STM1 2. Cellular Backhaul ONT STM1 ONT STM1 ONT 10/100BT 3. CATV Multiple System Operator ATM Remote DSLAM/DLC 4. DSLAM Aggregation Sharif University of Technology

  11. GPON Equipments FTTC GPON ONU Splitter GPON ONU GPON OLT FTTH GPON ONT Fiber Cable Twisted Pair Electrical or Optical Sharif University of Technology

  12. GPON Equipments ONU Up to 128 10/100 Base-T OLT ADSL2+/VDSL2 Optical Splitter 10GbE GPON GbE ODN PPPoE ONT 10/100/1000 Base-T • Network processing • Advanced traffic management functionality • GPON Framer 2×POTS WiFi Sharif University of Technology

  13. Optical “Food Chain” Sharif University of Technology

  14. Optical Communication Protocol Stack Sharif University of Technology

  15. ITU-T Recommendations GPON Protocol Stack and Common Functions GPON common functions Protocol stack for the GTC Sharif University of Technology

  16. GPON GTC Frame Format GTC Layer Framing for Downstream and Upstream Downstream GPON Frame Format Sharif University of Technology

  17. Generic Optical Fiber System Sharif University of Technology

  18. An 8.5-Gb/s Fully Integrated CMOS Optoelectronic Receiver Using Slope-Detection Adaptive Equalizer, JSCC 2010 Sharif University of Technology

  19. Differential n-well Photodiode Rectangular n-well diodes are covered by light-blocking metals LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  20. Photodiode Responsivity Variation Doping dependency of the photodiode responsivity at 3-dB frequency (5.9 GHz) temperature dependency of the photodiode responsivity LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  21. Variation of CPD Doping dependencies of CPD Temperature dependencies of CPD LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  22. Proposed OEIC Receiver LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  23. Proposed Adaptation Circuit LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  24. Proposed Feedback TIA & DC-Balanced Buffer LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  25. Proposed Equalization Filter Cell Frequency Response Simulated frequency response of the proposed equalization filter cell for various capacitor control voltages LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  26. LA First Stage Gain Cell LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  27. LA Second Stage & Replica Bias Circuit LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  28. Temperature Variation Simulated bandwidth of the silicon photodiode and the proposed receiver front-end at various temperatures. LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  29. Chip microphotograph LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  30. Measurement LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  31. Measured Eye-Diagrams Minimal Equalization Optimal Equalization LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  32. Measured BER of OEIC Receiver LEE et al.: AN 8.5-Gb/s FULLY INTEGRATED CMOS OPTOELECTRONIC RECEIVER USING SLOPE-DETECTION ADAPTIVE EQUALIZER, JSCC 2010 Sharif University of Technology

  33. LDD (SB350) Sharif University of Technology

  34. TIA (SB360) Sharif University of Technology

  35. PA (SB370) Sharif University of Technology

  36. TIA/PA (SB380) Sharif University of Technology

  37. Question and Answer Thanks for your attention… Sharif University of Technology

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