| http://www.w3.org/ns/prov#value | - Referring to FIG. 3 a compensating fiber for removing the centrally propagating modes has a cladding diameter of 125 microns with a cladding refractive index of 1.458, and a core having an index variation corresponding essentially to the equation n(r)=n(0) sech Ar where n(r) is the refractive index at a distance r from the fiber core, n(0) is the refractive index at the core, and A is a constant.
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