20 September 2002 Theoretical model of Er-doped Al2O3 waveguide amplifier
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Abstract
The large refractive index changes can provide a strong confinement of the electromagnetic field on the active region of erbium-doped Al2O3 rib waveguide amplifiers on silicon substrate with SiO2 buffers. The finite element technique is used to calculate the dispersion characteristics for different rib waveguide geometry. The propagation constants of the quasi-TE and quasi-TM mode and magnitude distributions of electromagnetic field components are presented at both signal and pump wavelengths. A suitable waveguide amplifier transverse cross-section sizes are determined in order to assure the single mode operate at least at the signal wavelength. Bessel distribution field in fiber excites the modes in waveguide amplifier considering fiber-waveguide coupling. The mode excitation fraction is given as a function of fiber core radius. Normalized pump and signal intensities are obtained.
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Shufeng Li, Changlie Song, Chengren Li, Wenxong Rao, "Theoretical model of Er-doped Al2O3 waveguide amplifier", Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); doi: 10.1117/12.479544; https://doi.org/10.1117/12.479544
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