| 摘要 |
An optical waveguide amplifier fiber comprises a core region at least in part comprises Er2O3, Al2O3, GeO2 and Ga2O3. The amplifier fiber also comprises an inner clad surrounding the core region, and an outer clad surrounding the inner clad. The relative refractive index percentages and radii of the core region, inner clad and outer clad are chosen from the following ranges: the relative refractive index percent of the core segment within the range of from about 0.5% to about 1.2%; the relative refractive index percent of the inner clad within the range of from about 0.0% to about 0.3%; the outer radius of the core region within the range of from about 2.0 mum to about 5.0 mum; and, the outer radius of the inner clad within the range of from about 3.8 mum to about 10.2 mum. The amounts of Er2O3, Al2O3, GeO2 and Ga2O3 within the core region, and the relative refractive index percentages in the radii of the core region, inner clad and outer clad are selected to provide an effective area of greater than or equal to about 38.6 mum2 at a wavelength of 1590 nm.
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