Transmitter Predistortion for Simultaneous Improvements in Bit Rate, Sensitivity, Jitter, and Power Efficiency in 20 Gb/s CMOS-Driven VCSEL Links

The effect of applying feed-forward equalization (FFE) on the transmitter side is studied for three different full optical links. In contrast to all previous works, the FFE settings are optimized for a complete link, rather than just the vertical-cavity surface-emitting laser output. The approach results in dramatic improvements in total link performance: >; 6 dB in sensitivity, 3X in timing margin, and 2X in power efficiency at 15 Gb/s, and a record 5.7 pJ/bit at 20 Gb/s.

[1]  Daisuke Watanabe,et al.  CMOS optical 4-PAM VCSEL driver with modal-dispersion equalizer for 10Gb/s 500m MMF transmission , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[2]  Yukito Tsunoda,et al.  25-Gb/s transmitter for optical interconnection with 10-Gb/s VCSEL using dual peak-tunable pre-emphasis , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[3]  Azita Emami-Neyestanak,et al.  A 90 nm CMOS 16 Gb/s Transceiver for Optical Interconnects , 2008, IEEE Journal of Solid-State Circuits.

[4]  Benjamin G Lee,et al.  Low-power CMOS-driven transmitters and receivers , 2010, CLEO/QELS: 2010 Laser Science to Photonic Applications.

[5]  D. Kuchta,et al.  30 Gb/s Directly Modulated 850 nm Datacom VCSELs , 2008 .

[6]  Y. Kwark,et al.  A 20 Gb/s VCSEL driver with pre-emphasis and regulated output impedance in 0.13 /spl mu/m CMOS , 2005, ISSCC. 2005 IEEE International Digest of Technical Papers. Solid-State Circuits Conference, 2005..

[7]  Sorin P. Voinigescu,et al.  Circuits and technologies for highly integrated optical networking ICs at 10 Gb/s to 40 Gb/s , 2001, Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169).

[8]  A. Chandrakasan,et al.  18Gb/s Optical IO: VCSEL Driver and TIA in 90nm CMOS , 2007, 2007 IEEE Symposium on VLSI Circuits.

[9]  C. S. Wang,et al.  High-efficiency, high-speed VCSELs with 35 Gbit=s error-free operation , 2007 .

[10]  Benjamin G. Lee,et al.  A 24-Channel, 300 Gb/s, 8.2 pJ/bit, Full-Duplex Fiber-Coupled Optical Transceiver Module Based on a Single “Holey” CMOS IC , 2011, Journal of Lightwave Technology.

[11]  Jason T. S. Liao,et al.  Optical I/O technology for tera-scale computing , 2009, ISSCC 2009.

[12]  G.C. Papen,et al.  3.3-V CMOS pre-equalization VCSEL transmitter for gigabit multimode fiber links , 1999, IEEE Photonics Technology Letters.

[13]  G. L. Lippi,et al.  Faster modulation of single-mode semiconductor lasers through patterned current switching: numerical investigation , 2004 .

[14]  F. Ellinger,et al.  A 100-mW 4/spl times/10 Gb/s transceiver in 80-nm CMOS for high-density optical interconnects , 2005, IEEE Journal of Solid-State Circuits.

[15]  C L Schow,et al.  High-performance 850 nm VCSEL and photodetector arrays for 25 Gb/s parallel optical interconnects , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[16]  M. Kennel,et al.  Shaping current waveforms for direct modulation of semiconductor lasers , 2004, IEEE Journal of Quantum Electronics.