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40 GHz small-signal cross-gain modulation in 1.3𝜇m quantum dot semiconductor optical amplifiers

Meuer, Christian; Kim, Joungmok; Laemmlin, M.; Liebich, S.; Bimberg, Dieter; Capua, Amir; Eisenstein, Gadi; Bonk, René; Vallaitis, Thomas; Leuthold, Juerg; Kovsh, A. R.; Krestnikov, Igor L.

Inst. Festkörperphysik

Small-signal cross-gain modulation of quantum dot based semiconductor optical amplifiers (QD SOAs), having a dot-in-a-well structure, is presented, demonstrating superiority for ultrahigh bit rate wavelength conversion. Optimization of the QD SOA high speed characteristics via bias current and optical pump power is presented and a small-signal 3 dB bandwidth exceeding 40 GHz is demonstrated. The đť‘ť-doped samples investigated here enable small-signal wavelength conversion within a range of 30 nm, limited mainly by the gain bandwidth.
  • This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 93, 051110 (2008) and may be found at https://doi.org/10.1063/1.2969060.