Ultrafast pulse-pair amplification in InGaAs quantum-dot amplifiers

P. Borri, T. Arekar, V. Cesari, M. Rossetti, A. Fiore, W. Langbein

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

Semiconductor optical amplifiers (SOAs) are important devices for optical communications being low-cost and having small size, high gain, and large amplitude and phase nonlinearities. However, slow dynamics of the gain nonlinearities in conventional bulk and quantum well SOAs (mainly due to carrier heating) usually limit the performance of these amplifiers for optical signal processing at high bit rates (>10Gb/s). Using a pump-probe differential transmission technique in heterodyne detection with sub-picosecond time resolution we have measured the GS ultrafast gain recovery dynamics in electrically-pumped InGaAs/GaAs QD SOAs operating near 1.3 mum at room temperature in the presence of a pump pulse pair. Here, we have introduced a pre-pump at a variable delay time relative to the pump pulse, which can be independently adjusted in intensity and modulated separately. The results suggest a dominant effect of an inhomogeneous distribution of recovery times, as could be expected from a microstate model, rather than the effect of ES depletion. From the application point of view, our findings indicate that a pulse sequence of 2 THz repetition rate would undergo ultrafast amplification.
Original languageEnglish
Title of host publicationProceedings of the European Conference on Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference (CLEO Europe - EQEC 2009), 14-19 June 2009, Munich, Germany
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Print)978-1-4244-4079-5
DOIs
Publication statusPublished - 2009
EventThe European Conference on Lasers and Electro-Optics, CLEO_Europe 2009 - ICM Center of the New Munich Trade Fair Centre, Munich, Germany
Duration: 14 Jun 200919 Jun 2009
http://2009.cleoeurope.org/

Conference

ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe 2009
Abbreviated titleCLEO®/Europe-EQEC 2009
CountryGermany
CityMunich
Period14/06/0919/06/09
OtherCLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference
Internet address

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