Title :
The performance of depressed-cladding single-mode fibers with different b/a ratios
Author :
Hagemann, Hans-Jürgen ; Lade, Hartmut ; Warnier, Jaques ; Wiechert, Detlef U.
Author_Institution :
Philips Res. Lab., Aachen, Germany
fDate :
6/1/1991 12:00:00 AM
Abstract :
Depressed-cladding single-mode fibers with a first cladding-to-core ratio (b/a) ranging from seven to one and relative refractive-index differences of the core from 0.25 to 0.35% and of the cladding from 0 to -0.2% are investigated experimentally with respect to the LP11 mode cutoff properties, the mode-field diameter, the dispersion, and the bending attenuation. Numerical calculations based on actual profile parameters of the bend loss and the mode-field diameter agree well with experiment. It is demonstrated that low attenuation and bend losses independent of b/a can be obtained if the cutoff wavelength is kept constant by adjusting the core radius, the core index or the index of the first cladding
Keywords :
claddings; optical dispersion; optical fibres; optical losses; refractive index; bend loss; bending attenuation; cladding-to-core ratio; core index; core radius; cutoff wavelength; depressed-cladding single-mode fibers; dispersion; first cladding; mode cutoff properties; mode-field diameter; performance; profile parameters; relative refractive-index differences; Attenuation; Costs; Fabrication; Glass; Modems; Optical attenuators; Optical refraction; Refractive index; Samarium; Silicon compounds;
Journal_Title :
Lightwave Technology, Journal of
