Gambling, W.A., Matsumura, H. and Ragdale, C.M.
Zero total dispersion in graded-index single-mode fibres
Electronics Letters, 15, (15), . (doi:10.1049/el:19790343).
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The combined effects of composite material dispersion, profile and waveguide dispersion can be made zero at a wavelength which depends on core diameter. refractive-index profile and composition. Wide bandwidths over large repeater spacings are therefore possible although close fabrication tolerances may be required.
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