title: Two-photon absorption-induced self-phase modulation in GaAs-AlGaAs waveguides for surface-emitted second-harmonic generation.
abstract: 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.
authors: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA.
authors: T G
authors: TG
authors: Ulmer
authors: R K
authors: RK
authors: Tan
authors: Z
authors: Z
authors: Zhou
authors: S E
authors: SE
authors: Ralph
authors: R P
authors: RP
authors: Kenan
authors: C M
authors: CM
authors: Verber
authors: A J
authors: AJ
authors: SpringThorpe