[fiber, fWidth, n2I] = getFiber(sFiberName) [fiber, fWidth, n2I] = getFiber(sFiberName, bBirefringent) [fiber, fWidth, n2I] = getFiber(sFiberName, sBrand, bBirefringent) bBirefringent = true/false(default) fWidth = fMFD/2; % is radius