Abstract
This paper describes an interrelationship between loss and dispersion which can result in a high bandwidth over a much wider wavelength region than predicted for perfect power-law profiles.(1) The fibers studied were drawn from MCVD preforms with germania phosphosilicate (Ge02-P205-Si02) cores and phosphoborosilicate (P205-B203-Si02) barrier layers which separate the cores from silica (Si02) claddings. Results are compared for two fibers. Fiber #1 has a moderately high OH ion concentration and a core profile shape that is well graded for the 0.8-1.1-µn wavelength region.(2) Fiber #2 is a low-loss fiber containing very little water.
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