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Team from Technische Universitaet Berlin beats Japanese Industrial Giant in the field of Quantum Dot Lasers

Aixtron Young Scientist Award presented at the 13th International Symposium "Nanostructures: Physics and Technology"

The race is on low cost, temperature stable, high speed GaAs-based quantum dot lasers emitting at the important fiber wavelength of 1.3 µm, the strategic component for soon to come Optical Access Networks.

At the strategic Asian Photonics conference TICON in Taipeh/Taiwan in June 2004, a consortium lead by the Technische Universitaet Berlin and consisting of

• the wafer company Nanosemiconductors (a spin-off of the TU Berlin and the Ioffe Institute St. Petersburg),
• the U2T AG Berlin, a high frequency device company,
• the Heinrich-Hertz Institute Berlin and
• the Ioffe Institute St. Petersburg

presented the first directly modulated GaAs-based quantum dot laser beyond 7 GHz at 1.3 µm, promising to enable 10 Gbit/sec data transmission. Soon afterwards at ECOC in Sweden in September, Fujitsu of Tokyo/Japan presented such first digital modulation of a quantum dot laser at 10 Gbit/sec as a post-deadline paper.

Subsequently at another International Conference in Cancun, Mexico in December 2004 the Berlin team presented a 11 Gbit/sec data modulation and the essential and decisive break-through of an error rate below 10-12 bit at 10 Gbit/sec data modulation. No bit error rate measurements on quantum dot lasers were hitherto presented by any team in the world.

The latest results in this field, which were presented by TU Berlin PhD candidate Matthias Kuntz at the International Symposium on Nanostructures in St. Petersburg in June 2005, were awarded with the unique and prestigious Aixtron Young Scientist Award. Matthias received the award from Nobel Prize Laureate Zhores I. Alferov on June 25. 

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