BEND LOSS IN SINGLE-MODE FIBERS

In this paper, we present the results of extensive single-radius bend loss measurements for two different fibers over wide ranges of wavelen gth (800-1600 nn) and curvature radius (13.5-27.5 mm). A new bend loss formula is also derived, allowing a good fit of experimental data ove r the whole range of both parameters. Using an equivalent step-index ( ESI) approach we obtain a good agreement between estimated and real pa rameters: e.g., cutoff wavelengths are within 1%.