| 摘要 |
To broaden the range of wavelengths over which an optical fiber has low loss and low chromatic dispersion, four optically active cladding (22, 23, 24, 25) layers are employed. The relative refractive indices and radii of the core and claddings are advantageously selected (e.g. as shown) such that the chromatic dispersion curve has three zero crossings. <IMAGE> |
