Multimode optical fiber

Abstract From the Canadian patent

Abstract of the Disclosure A multimode optical fiber waveguide with graded refractive index for lessening modal dispersions depends upon simultaneous grading of both P2O5 and B2O3 within an otherwise generally unmodified silica glass P2O5 is at a, maximum in the axial core region while B2O5 is generally, the only modifier in the peripheral core region. The defined profile, which depends critically upon P2O5 content in the axial composition and somewhat less critically upon the B2O3 periphoral composition content is near optimum, from the standpoint of mode dispersion and remains so for the entire useful range of carrier wavelength (generally defined as from 0.5 to 1.1 µm). Numerical …