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

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6 Author(s)
Alexander V. Rylyakov ; IBM Thomas J. Watson Research Center, Yorktown Heights, NY, USA ; Clint L. Schow ; Benjamin G. Lee ; Fuad E. Doany
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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.

Published in:

Journal of Lightwave Technology  (Volume:30 ,  Issue: 4 )