Ultrafast refractive-index dynamics in a multi-quantum well semiconductor optical amplifier

H.J.S. Dorren, X. Yang, D. Lenstra, H. Waardt, de, G.D. Khoe

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Abstract

We investigate ultrafast refractive index dynamics in a multi-quantum well InGaAsPInGaAs semiconductor optical amplifier that is operated in the gain regime by using pump and probe pulses that are cross-linearly polarized. We observe a phase shift of 200 degrees if the amplifier is pumped with 120 mA of current, but find that the phase shift vanishes if the injection current is increased to 160 mA. Our results indicate a contribution of two-photon absorption to the nonlinear phase shift that opposes the phase shift introduced by the gain. We observe that the phase shift comes up and disappears within a picosecond.
Original languageEnglish
Title of host publicationproc. Symposium IEEE/LEOS Benelux Chapter, 2002
EditorsTaco Visser, D., Daan Lenstra, Hugo Schouten, F.
Place of PublicationVrije Universiteit Amsterdam
PublisherIEEE/LEOS
Pages16-19
ISBN (Print)90-807519-1-X
Publication statusPublished - 2002
Event7th Annual Symposium of the IEEE/LEOS Benelux Chapter, December 9, 2002, Amsterdam, The Netherlands - Amsterdam, Netherlands
Duration: 9 Dec 20029 Dec 2002

Conference

Conference7th Annual Symposium of the IEEE/LEOS Benelux Chapter, December 9, 2002, Amsterdam, The Netherlands
CountryNetherlands
CityAmsterdam
Period9/12/029/12/02

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