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40 Gbit/s directly modulated passive feedback laser

: Troppenz, U.; Kreissl, J.; Rehbein, W.; Bornholdt, C.; Sartorius, B.; Schell, M.


IEEE Lasers and Electro-Optics Society; IEEE Electron Devices Society:
20th International Conference on Indium Phosphide and Related Materials, IPRM 2008 : 25-29 May 2008, Versailles, France
New York, NY: IEEE, 2008
ISBN: 978-1-4244-2258-6
4 S.
International Conference on Indium Phosphide and Related Materials (IPRM) <20, 2008, Versailles>
Fraunhofer HHI ()

High speed directly modulated lasers are key devices for compact, low cost transmitters. In this paper we describe the mechanism of modulation bandwidth enhancement by passive feedback sections and the characteristics of accordingly fabricated 1.55 µm InGaAsP/InP lasers. The system performance at 40 Gbit/s is analysed, including VSR transmission and BER measurements, and the potential for chirp tuning is shown.