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CMOS Transceiver Circuits for Short-Reach Optical Communication, Presented by Tony Chan Carusone

Date
2017-10-23
Time
12:00 PM ET
Location
Webinar - Online
Contact
Abira Sengupta – abira.sengupta@ieee.org
Description
Abstract: Optical links 1 – 100 metres in length require low cost, low power consumption and small size. Vertical cavity surface emitting lasers (VCSELs) can be arrayed inexpensively and can be directly modulated, avoiding the need for separate optical modulator components. VCSELs coupled to multimode fiber offer a compact and inexpensive optoelectronic assembly, and are predominant for short reach optical communication. The key challenge for the transmitter circuit in such systems is to modulate single-ended VCSEL currents up to about 10mA at 25+Gb/s while maintaining bias voltages of approximately 2V across the VCSELs, and contending with inherent laser nonlinearity. At the receiver, a key challenge is to provide adequate sensitivity using photodiodes with wide (50um) aperture and, hence, large capacitance. Current commercial transceiver circuits are realized in SiGe BiCMOS, which is advantageous at both the transmitter and receiver, but CMOS offers the potential for higher levels of integration and lower power consumption. Our research efforts on low-power CMOS VCSEL drivers and optical receivers will be presented, including 65nm & 28nm CMOS designs.
 
Bio: Tony Chan Carusone has been a professor in the Department of Electrical and Computer Engineering at the University of Toronto since 2001. He has co-authored a total of 6 best paper award winners at the Custom Integrated Circuits Conference, Compound Semiconductor I.C. Symposium, and European Solid-State Circuits Conference. He has served as Editor-in-Chief of the IEEE Transactions on Circuits and Systems II: Express Briefs, and as a member of several technical program committees. He currently serves on the editorial board of the IEEE Journal of Solid-State Circuits, and on the technical program committee for ISSCC. Prof. Chan Carusone is a regular consultant to industry, and an author of the textbook “Analog Integrated Circuit Design”.

 

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