KIT scientist awarded for work with optical communication technology

Christian Koos is awarded this year’s State Prize for Applied Research (photo: Markus Breig, KIT).

 

Christian Koos is awarded this year’s State Prize for Applied Research (photo: Markus Breig, KIT).
Christian Koos is awarded this year’s State Prize for Applied Research (photo: Markus Breig, KIT).

Professor Christian Koos of the Karlsruhe Institute of Technology (KIT) is awarded this year’s Baden-Württemberg State Prize for Applied Research. Minister for Science, Research, and Art, Theresia Bauer, made the announcement in Stuttgart today. Koos conducts research on nanophotonic components and novel techniques of optical high-speed communication. Together with colleagues of the Ecole Polytechnique Fédérale de Lausanne (EPFL) he and his team succeeded in transmitting a data stream of 1.44 terabit per second – corresponding to the data volume of more than 100 million telephone calls – using a miniaturized frequency comb as an optical source.

“Optical high-speed communication is the backbone of information society. Professor Christian Koos’ research is an outstanding contribution to the solution of important problems of the future. The State Research Prize awarded to him is another acknowledgment of his great achievements,” says KIT President Professor Holger Hanselka.

Professor Christian Koos and his co-workers conduct research on new optical components and transmission techniques for terabit communications at the KIT’s Institute of Photonics and Quantum Electronics and at its Institute of Microstructure Technology. This work allows to miniaturize optical components and enables integration on optical microchips. “We seek to reduce to the size of current rack-filling transmitter and receiver systems to a matchbox format. This makes systems not only less expensive, but also saves electricity; our components are among the most energy-efficient worldwide,” explains Koos. Besides terabit communication in large data centers, he envisages a number of other possible applications of his components, e.g., in optical sensing and metrology or in life sciences, where optical chips are also becoming more and more important.

Using optical frequency combs instead of conventional laser light is a key concept to speed up data transmission: Optical frequency combs consist of thousands of closely spaced spectral lines whose distances are defined very precisely. Each of these spectral lines can be used to transmit an optical data stream. “A single frequency comb source can replace a large number of conventional lasers in a data transmission system,” says Jörg Pfeifle, who conducts research on frequency combs in the group of Christian Koos. In combination with nano-scale components that can be integrated in larger quantities on one tiny silicon chips, optical frequency combs allow data streams to be processed with highest transmission rates in an energy-efficient way. Together with colleagues of the Ecole Polytechnique Fédérale de Lausanne (EPFL), Koos and his team last year were the first research group in the world to show that miniaturized optical frequency comb sources allow data transmission rates of up to 1.44 terabit per second over 300 km to be achieved. This corresponds to a data volume of more than 100 million telephone conversations.

Christian Koos intends to spend part of the prize money on investments into equipment opening up new possibilities in nanofabrication and data transmission. In addition, he also plans to make use of the prize money as “scientific venture capital,” allowing young scientists room for creative research. “I would like to use these funds to finance work of post-graduates and post-docs who want to try out new ideas on their own,” says Koos.

The Baden-Württemberg State Ministry for Science, Research, and Art awards the State Research Prize to outstanding scientists. This most highly endowed research prize of any German federal state in the amount of EUR 200,000 is given in equal parts to one scientist each in basic research and applied research. This year’s basic research award goes to Professor Katerina Harvati-Papatheodorou, a paleoanthropologist at the University of Tübingen. The awarding ceremony will be held in Stuttgart on December 8, 2014.

Some personal information about Professor Christian Koos

Christian Koos his with Karlsruhe Institute of Technology since 2010. Since 2013, he has headed the Institute of Photonics and Quantum Electronics and has been a member of the Management Board of the Institute of Microstructure Technology. The work awarded with the State Research Prize is part of the multi-disciplinary training program of the Helmholtz International Research School for Teratronics (HIRST), whose coordinator and spokesperson Christian Koos has been since 2012.

Koos studied electrical engineering and computer technology at the then University of Karlsruhe (TH), now the KIT, between 1997 and 2002. He finished his diploma thesis at Massachusetts Institute of Technology (MIT). Afterwards, he obtained his doctorate at the High-Frequency and Quantum Electronics Laboratory of the University of Karlsruhe (TH), where he also did research as a post-doc. After spending two years with Carl Zeiss AG, where he was heading the technology radars for Nanotechnology and Metrology, Koos returned to Karlsruhe in 2010. Based on his research on nanophotonics and optical data transmission, the 36-year-old scientist was awarded a series of prizes and grants over the last years. In 2011, Koos obtained an “ERC Starting Grant” in the amount of EUR 1.5 million by the European Research Council. One year later, he won the Alfried Krupp Prize for Young University Teachers, which is endowed with 1 million euro. Christian Koos has authored and co-authored more than 200 publications in scientific journals and conference proceedings, more than 140 conference presentations, and more than 20 patent applications. The editors of the “Capital” business magazine repeatedly voted him among the “40 top talents in politics, industry, science.”

Karlsruhe Institute of Technology (KIT) is a public corporation according to the legislation of the state of Baden-Württemberg. It fulfills the mission of a university and the mission of a national research center of the Helmholtz Association. Research activities focus on energy, the natural and built environment as well as on society and technology and cover the whole range extending from fundamental aspects to application. With about 9400 employees, including more than 6000 staff members in the science and education sector, and 24500 students, KIT is one of the biggest research and education institutions in Europe. Work of KIT is based on the knowledge triangle of research, teaching, and innovation.