Two-photon absorption-induced self-phase modulation in GaAs-AlGaAs waveguides for surface-emitted second-harmonic generation

Performance-limiting asymmetric distortion is observed in the spectra of fundamental pulses transmitted through GaAs-Al(0.9)Ga(0.1)As multilayer waveguides designed for surface-emitted second-harmonic generation. This behavior is attributed to refractive-index changes resulting from the accumulation...

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Bibliographic Details
Published in:Optics letters 1999-06, Vol.24 (11), p.756-758
Main Authors: Ulmer, T G, Tan, R K, Zhou, Z, Ralph, S E, Kenan, R P, Verber, C M, SpringThorpe, A J
Format: Article
Language:English
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Summary:Performance-limiting asymmetric distortion is observed in the spectra of fundamental pulses transmitted through GaAs-Al(0.9)Ga(0.1)As multilayer waveguides designed for surface-emitted second-harmonic generation. This behavior is attributed to refractive-index changes resulting from the accumulation of free carriers created by two-photon absorption in the GaAs layers. Numerical simulations of the intensity-dependent spectra by use of the separately measured two-photon absorption coefficient are shown to be in good agreement with the observed spectra.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.24.000756