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40 Gbit/s directly modulated passive feedback laser with complex-coupled DFB section

: Kreissl, J.; Troppenz, U.; Rehbein, W.; Gaertner, T.; Harde, P.; Radziunas, M.

Verband der Elektrotechnik, Elektronik, Informationstechnik -VDE-; IEEE Lasers and Electro-Optics Society; Informationstechnische Gesellschaft -ITG-; Institution of Engineering and Technology -IET-:
ECOC 2007, 33rd European Conference and Exhibition on Optical Communication. CD-ROM : September 16 - 20, 2007, Berlin, Germany
Berlin: VDE Verlag, 2007
ISBN: 3-8007-3042-1
ISBN: 978-3-8007-3042-1
2 S.
European Conference on Optical Communication (ECOC) <33, 2007, Berlin>
Fraunhofer HHI ()
Laser; Lichtemission; Lichtquelle; verteilte Rückkopplung; Lichtmodulation

40 Gbit/s open eyes are demonstrated for a passive feedback laser transmitter with complex coupled DFB section. The transmitter shows superior single mode emission in combination with chirp tuning capability and high reliability. For a multisection PFL transmitter including a complex-coupled DFB section optical modulation bandwidth of 30 GHz and open eyes for large signal 40 Gbit/s direct current modulation with 6 dB extinction ratio have been demonstrated. The device shows high single mode stability under varying phase conditions of the integrated feedback which is necessary for optical bandwidth enhancement. For data rates below 40 Gbit/s, the PFL structure has the potential to be applied for feedback controlled chirp management, thus opening up a huge potential for applications in new highly dispersion tolerant modulation formats. Reasonable life times of about 100000 h could be estimated proving reliable technological fabrication.
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