Four years project time is almost over; faster than one can imagine. In October 2017 the ADDAPT project will be finalized. The overall results will be presented at the final project and review meeting which is planned for early December.
ADDAPT consortium member TU Dresden designed a VCSEL driver which incorporates an adjustable 2-tap feed-forward equalizer (FFE) in 14 nm SOI CMOS technology. Using the FFE approach it is possible to reach data rates which exceed the inherent bandwidth of the laser. Successfully implementation and measurements reveal error-free electro-optical operation up to 42 Gb/s at 2.8 pJ/bit including the VCSEL power consumption. The design and the results will be presented at 12th European Microwave Integrated Circuits Conference (EuMIC) taking place on 08-13 October 2017 in Nuremberg, Germany.
One part of the ADDAPT receiver module will be presented at the IEEE International System-on-Chip Conference (SOCC) which takes place on 05-08 September 2017 in Munich, Germany. An analog front end was designed and successfully characterized in 14-nm FinFET CMOS technology. The electro-optical subassembly provides up to 28 Gb/s at only 0.82 pJ/bit featuring a rapid power-on/off switching.
Together with partners from Technical University of Denmark, the ADDAPT consortium members VIS and WUT published the results of their studies on MultiCAP modulation scheme in 850 nm VCSEL-based multimode fiber links. For the investigations the VCSEL design by VIS in ADDAPT was used. It is shown that the proposed modulation scheme can adapt to different data traffic demands and transmission link conditions, with advantages of variable bit rate and, therefore, power consumption adaptivity.
The ADDAPT consortium is pleased to co-organize the 3rd workshop on Technology for Data Center Interconnects (DACINT) at 19th International Conference on Transparent Optical Networks (ICTON) which takes place July 2-6, 2017 in Girona, Spain. The project also contributes with four invited talks covering high-speed VCSELs and VCSEL transmission, adaptive high-speed and ultra-low power optical interconnect and adaptive VCSEL driver design. See Publications for more information.
In June, the ADDAPT optical receiver for up to 60 Gb/s with only 1.9 pJ/bit featuring a first-order digital CDR with high jitter tolerance has been presented at the Symposium on VLSI Circuits in Kyoto, Japan. More information on the work are available in a short YouTube Interview provided by IBM Research. The work is also mentioned in EE Times.
Project partner TUD presented another adaptive circuit in 28 nm CMOS technology. In June at IEEE Optical Interconnects Conference, this time an adaptive VCSEL driver is presented which is capable of up to 30 Gb/s with only 1.7 pJ/bit. Successful down-scaling to 15 Gb/s is demonstrated while reducing the power consumption significantly and maintaining the modulation amplitude.
In ADDAPT new high-speed single-mode VCSEL, which is capable to operate at data rates up to 50 Gb/s or even more, has been designed by project partner VIS. Project partner CSTG fabricated the design. The results are presented during the VCSEL Day 2017 in Cardiff, UK.
The ADDAPT consortium will meet for its 9th project meeting from 17-18 May 2017. The main topics will be the final steps on the project. Last plannings of the final packages for demos and characterization will be discussed.
IBM presents the data path of the optical ADDAPT receiver at IEEE International Solid-States Circuits Conference (ISSCC) in February 2017, San Francisco , USA. ISSCC is the foremost global forum for solid-state circuits and systems-on-a-chip. The receiver data path was successfully characterized up to 64 Gb/s optically while just consuming 1.4 pJ/bit.To the best of our knowledge, this is the highest data rate with superior energy efficiency among previously reported CMOS optical RXs.
The ADDAPT project co-organizes a special session on Optical Fibers in Telecommunication at the 17th Conference on Optical Fibers and Their Applications, taking place 23.01-27.01.2017 in Suprasl, Poland. With this unique chance the approaches and results of the project were presented in five talks from four project partners. See Publications for more information.
From 09-10 November 2016 the ADDAPT consortium meets for the 8th time.
In October 2017, the European Microwave Integrated Circuits Conference, which is one of the premier European technical conference for RF, microwave and Terahertz microelectronics, takes place in London, UK. At this conference TU Dresden will present one of the fist bandwidth and power adaptive optical receiver amplifier implemented in a 28-nm CMOS technology. By scaling down the circuit from 30 to 10 Gb/s, 50 % of its power consumption can be saved while keeping the gain constant.
The ADDAPT project will also be present at the 42nd European Conference on Optical Communications (ECOC) taking place 18-22 September 2017 in Duesseldorf, Germany. The project partner WUT will present a joint work with VIS on PAM transmssion using ADDAPT’s single mode VCSEL for up to 108 Gb/s over 100 m of fiber.
WUT publishes a paper on adaptive MultiCAP modulation together with their external collaborator Technical University of Denmark at Latin America Optics and Photonics Conference. The paper incorporates the application of VCSELs for MultiCAP modulation and investigates the adaptive use of the several bands for performance and bandwidth tuning.
The ADDAPT consortium member presents and publishes its VCSEL model at the 12th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME) in Lisbon, Portugal.
Again ADDAPT is involved in the XXXVIII-th IEEE-SPIE Joint Symposium on Photonics, Web Engineering, Electronics for Astronomy and High Energy Physics Experiments. Out project partner WUT presents high-speed transmission rest results with ADDAPT VCSELs which were designed by VIS. Continue reading
On 26th and 27th May 2016 the ADDAPT consortium will meet at IBM Research Zurich, Switzerland, for its 7th project meeting and the review meeting of the 2nd project period. During the meeting the first successful practical implementations of the ADDAPT techniques will be presented and discussed