Ultrafast pulse-pair amplification in InGaAs quantum-dot amplifiers

Borri, Paola, Arekar, Trupti, Cesari, Valentina, Rossetti, Marco, Fiore, Andrea and Langbein, Wolfgang 2009. Ultrafast pulse-pair amplification in InGaAs quantum-dot amplifiers. Presented at: Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, Munich, Germany, 14-19 June 2009. Published in: Borri, Paola ORCID: https://orcid.org/0000-0002-7873-3314, Arekar, Trupti, Cesari, Valentina, Rossetti, Marco, Fiore, Andrea and Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023 eds. Institute of Electrical and Electronics Engineers ( IEEE ), p. 1. 10.1109/CLEOE-EQEC.2009.5192634

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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.

Item Type:	Conference or Workshop Item (Paper)
Status:	Published
Schools:	Biosciences
Subjects:	Q Science > Q Science (General) Q Science > QC Physics T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering
Publisher:	Institute of Electrical and Electronics Engineers ( IEEE )
ISBN:	9781424440795
Related URLs:	http://www.opticsinfobase.org/abstract.c...
Last Modified:	06 Nov 2022 13:26
URI:	https://orca.cardiff.ac.uk/id/eprint/27012

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