1.3 mu m Quantum Dot Laser in coupled-cavity-injection-grating design with bandwidth of 20 GHz under direct modulation

F. Gerschuetz*, M. Fischer, J. Koeth, I. Krestnikov, A. Kovsh, C. Schilling, W. Kaiser, Sven Höfling, A. Forchel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Using a multi section laser in coupled cavity injection grating design based on 1.3 mu m InGaAs/GaAs quantum dot (QD) active region we were able to enhance the 3 dB modulation bandwidth well beyond the inherent material modulation bandwidth. The material bandwidth was determined by measurements on distributed feedback (DFB) devices to approximately 8 GHz. The special multisectional design allows interaction between the lasing mode and a second mode used as catalyst and enables a high resonance frequency of the device. Based on active QD material this approach allowed us to reach a cut off frequency of 20 GHz in the small signal response of the device. (C) 2008 Optical Society of America.

Original languageEnglish
Pages (from-to)5596-5601
Number of pages6
JournalOptics Express
Volume16
Issue number8
Publication statusPublished - 14 Apr 2008

Keywords

  • DBR LASERS
  • FEEDBACK

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