On this page you can follow the life of our group.
Leif Oxenløwe awarded the Elektropris 2009
The prestigious Elektropris, which is attributed each year by the Danish Society of Engineers (IDA), has been awarded this year to our group leader Leif Oxenløwe for his work on ultra-high speed optical communication.
The happy recipient of the Elektropris 2009 in company of past and present colleagues.
The prize recompenses for major contributions within the broad field of electrical engineering.
An happy and smiling Leif, supported by past and present colleagues, received the prize during a ceremony held on Tuesday 19 May at the Engineers House in Copenhagen.
[20-05-2009]
New record in serial binary transmission: 1.28 Tbit/s on a single wavelength channel
It has been more than 10 years since the last record for the bit rate of a single channel binary modulated signal without polarisation multiplexing had been broken, with an impressive 640 Gbit/s first demonstrated by researchers from NTT in Japan. A group of researchers from the High-Speed Optical Communications group at DTU Fotonik has now reported the generation and demultiplexing of a binary optical time division multiplexing (OTDM) signal at the unprecedented bit rate of 1.28 Tbit/s.
The use of quaternary phase modulation had allowed the demonstration by researchers at the Heinrich Hertz Institute in Berlin of signal generation, transmission and detection at 1.28 Tbit/s, and even 2.56 Tbit/s by employing polarisation multiplexing, already in 2005. However it is the first time that a signal with a symbol rate above 640 Gbaud has been generated and detected and that consequently the bit rate of 1.28 Tbit/s is reached using simple binary on-off keying modulation.
The results have been published in
H. C. Hansen Mulvad, L. K. Oxenløwe, M. Galili, A. T. Clausen, L. Grüner-Nielsen and P. Jeppesen, "1.28 Tbit/s single-polarisation serial OOK optical data generation and demultiplexing", Electronics Letters, vol. 45, no. 5, pp. 280-281, February 2009.
As a comparison, the maximum capacity ever transmitted over an optical fibre is 25.6 Tbit/s, distributed over 160 wavelength channels.
The original article can be retrieved via the IET or IEEE or SYSDOC (restricted access).
[26-02-2009]
Leif Oxenløwe to participate to the 8th CUDOS workshop
Our group leader is participating to the 8th CUDOS workshop in Lake Crackenback, N.S.W., Australia 10-13th February 2009. A frutiful collaboration has been initiated in 2008 between our group and the CUDOS research group at the University of Sydney, resulting in the first time demultiplexing of a 640 Gbit/s signal in a compact chacogenide glass chip. It is expected that the relations between the two groups will be strengthened after this workshop.
[08-02-2009]
Publication of breaktrough switching results catches media attention
The upcoming publication of our recent results on 640 Gbit/s demultiplexing in a compact chalcogenide glass chip has caught worldwide media attention after publication of a press release by the Optical Society of America. The work is a result of a collaboration between the High-Speed Optical Communications group at DTU Fotonik and the CUDOS research group at the University of Sydney. The results will be published in a forthcoming issue of Optics Express:
M. Galili, J. Xu, H. C. Hansen Mulvad, L. K. Oxenløwe, A. T. Clausen, P. Jeppesen, B. Luther-Davis, S. Madden, A. Rode, D.-Y. Choi, M. Pelusi, F. Luan, B. J. Eggleton, "Breakthrough switching speed with an all-optical chalcogenide glass chip: 640 Gbit/s demultiplexing", Optics Express, vol. 17, no. 4, pp. 2182-2187, February 2009.
The original article can be retrieved via Optics Express home page, or SYSDOC.
Following this press release, the information was reproduced by both scientific and general media all over the world.
[02-02-2009]