Multimode optical fiber waveguide with graded refractive index

Details Multimode optical fiber waveguide with graded refractive index Multimode optical fiber waveguide with graded refractive index

G - Physics

02

B

88/97.2

G02B 6/028 (2006.01) C03B 37/018 (2006.01) C03C 13/04 (2006.01)

Patent

CA 1050796

MULTIMODE OPTICAL FIBER Abstract of the Disclosure A multimode optical fiber waveguide with graded refractive index for lessening modal dispersion with the gradient produced at least in part by radially decreasing boron oxide content outwardly from the core center within a high silica glass core minimizes modal dispersion by use of a non-parabolic grading function. The optimum gradient for a simple binary borosilicate system for a wavelength of from approximately 0.5 to 1.1 micrometers corresponds with .alpha. = 1.77 ? 10 percent in the equation n = n1[1-2.DELTA.(r/a).alpha.]1/2, in which n1 is the axial core index r is the distance from the fiber axis, a is the core radius, .DELTA. is the relative index difference between core center and cladding and .alpha. is a power law exponent which characterizes the profile.

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