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

C. Meuer*, J. Kim, M. Laemmlin, S. Liebich, D. Bimberg, A. Capua, G. Eisenstein, R. Bonk, T. Vallaitis, J. Leuthold, A. R. Kovsh, I. L. Krestnikov

*Corresponding author for this work

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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 p -doped samples investigated here enable small-signal wavelength conversion within a range of 30 nm, limited mainly by the gain bandwidth.

Original languageAmerican English
Article number051110
JournalApplied Physics Letters
Issue number5
StatePublished - 2008
Externally publishedYes

Bibliographical note

Funding Information:
The authors acknowledge funding by the SANDiE NoE of the European Commission Contract No. NMP4-CT-2004-500101, the TRIUMPH Project No. IST-027638 STP, the Marie Curie Fellowship MIF1-CT-2006-040250, the State of Berlin (ProFIT MonoPic and OptiDot), and the Sonderforschungsbereich SFB 787 of the German Research Council. G. Eisenstein is a Humboldt awardee at TU Berlin and thanks the Humboldt Foundation for its support.


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