There has been an explosive growth in the Internet traffic due to social networking and cloud based applications over the past few years. To meet the bandwidth requirements created by this growth, very significant progress in the area of optical transmission system technologies and capabilities has been made. A single strand of optical fibre can now carry tens of terabit-per-second of data across continents using coherent techniques (which are similar to the techniques used in radio-frequency links for wireless communications). In addition, as datacentres are becoming more communications centric, switch interface speeds are expected to hit 1.6 terabit/second/fibre in near future for intra-datacentre interconnects. Starting from basics, I will be giving an overview of the progress in this field. To keep up with power consumption budget, reliability and form factor requirements, the use of optical coherent techniques for future intra-datacentre interconnects are being proposed. I will give a brief overview of the work being done by our team at IIT Bombay in this area. We will also have a short demo of the optical setup (hardware) we are using and the chips (integrated circuits) we have developed for these systems.
Shalabh Gupta received B. Tech degree from the Indian Institute of Technology Kanpur in 2001, and M.S. and PhD degrees from UCLA in 2004 and 2009, respectively, all in Electrical Engineering. For his PhD, he worked on the development of high-resolution high-speed analog-to-digital converters using photonic time stretch technique. From 2003-2006, he worked in industry on the design of analog integrated circuits for high-speed serial links and RFICs for wireless communications. He also spent some time at NEC Labs (Princeton, NJ) to learn and contribute in the area of high speed coherent optical links. Since 2009, he has been with the Indian Institute of Technology Bombay, where he is currently an Associate Professor of Electrical Engineering. His current research interests include design of high-speed integrated circuits (including silicon photonic integrated circuits) for wired, wireless and optical communication systems.