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Proceedings Paper

Small signal analysis of four-wave mixing in InAs/GaAs quantum-dot semiconductor optical amplifiers
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Paper Abstract

A model to study four-wave mixing (FWM) wavelength conversion in InAs-GaAs quantum-dot semiconductor optical amplifier is proposed. Rate equations involving two QD states are solved to simulate the carrier density modulation in the system, results show that the existence of QD excited state contributes to the ultra fast recover time for single pulse response by serving as a carrier reservoir for the QD ground state, its speed limitations are also studied. Nondegenerate four-wave mixing process with small intensity modulation probe signal injected is simulated using this model, a set of coupled wave equations describing the evolution of all frequency components in the active region of QD-SOA are derived and solved numerically. Results show that better FWM conversion efficiency can be obtained compared with the regular bulk SOA, and the four-wave mixing bandwidth can exceed 1.5 THz when the detuning between pump and probe lights is 0.5 nm.

Paper Details

Date Published: 24 February 2009
PDF: 7 pages
Proc. SPIE 7211, Physics and Simulation of Optoelectronic Devices XVII, 721110 (24 February 2009); doi: 10.1117/12.808320
Show Author Affiliations
Shaozhen Ma, Univ. of Connecticut (United States)
Zhe Chen, Univ. of Connecticut (United States)
Niloy K. Dutta, Univ. of Connecticut (United States)

Published in SPIE Proceedings Vol. 7211:
Physics and Simulation of Optoelectronic Devices XVII
Marek Osinski; Bernd Witzigmann; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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