Title :
Transmitter Predistortion for Simultaneous Improvements in Bit Rate, Sensitivity, Jitter, and Power Efficiency in 20 Gb/s CMOS-Driven VCSEL Links
Author :
Rylyakov, Alexander V. ; Schow, Clint L. ; Lee, Benjamin G. ; Doany, Fuad E. ; Baks, Christian W. ; Kash, Jeffrey A.
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
Abstract :
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.
Keywords :
equalisers; error statistics; feedforward; optical fibre communication; optical transmitters; semiconductor lasers; surface emitting lasers; timing jitter; CMOS-driven VCSEL Links; FFE; bit rate; bit rate 15 Gbit/s; bit rate 20 Gbit/s; feed-forward equalization; jitter; power efficiency; sensitivity; transmitter predistortion; vertical-cavity surface-emitting laser; CMOS integrated circuits; Optical fiber communication; Optical transmitters; Receivers; Sensitivity; Timing; Vertical cavity surface emitting lasers; CMOS analog integrated circuits; driver circuits; equalization; feed-forward equalization (FFE); optical communication; optical receivers; optoelectronic devices; photodetectors; photodiodes (PDs); pre-emphasis; semiconductor lasers;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2171917
