IEVref: 731-02-20 ID: Language: en Status: Standard Term: refractive index contrast Synonym1: Synonym2: Synonym3: Symbol: Δ Definition: a measure of the relative difference in refractive index of the core and the cladding of an optical fibre, given by: $\Delta =\frac{{n}_{1}^{2}-{n}_{2}^{2}}{2{n}_{1}^{2}}$ where n1 and n2 are, respectively, the maximum in the core and the refractive index of the innermost homogeneous cladding Publication date: 1991-10 Source: Replaces: Internal notes: 2017-06-02: Cleanup - Remove Attached Image 731-02-20.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: