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An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta Δ1MAX; and LP01 effective area 100 μm2 at 1550 nm; (ii) an inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN and ΔcoreMAXΔ2MIN; (iii) an outer c

An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta Δ1MAX; and LP01 effective area 100 μm2 at 1550 nm; (ii) an inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN and ΔcoreMAXΔ2MIN; (iii) an outer cladding surrounding the inner cladding and comprising a first outer cladding portion with a maximum refractive index Δ3A such that Δ3AΔ2MIN; and another outer cladding portion surrounding the first outer cladding portion with a maximum refractive index delta Δ3B wherein with a maximum refractive index delta Δ3B wherein Δ3BΔ3A, said another portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔCΔ3B.

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1. An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ΔcoreMAX; and LP01 effective area >100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN and ΔcoreMAX>Δ2MIN;(i

1. An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ΔcoreMAX; and LP01 effective area >100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN and ΔcoreMAX>Δ2MIN;(iii) an annular outer cladding surrounding the inner cladding and comprising (a) a first outer cladding portion with a maximum refractive index Δ3A such that Δ3A>Δ2MIN; and (b) another outer cladding portion surrounding the first outer cladding portion with a maximum refractive index delta Δ3B wherein ΔcoreMAX>Δ3B>Δ3A, said another outer cladding portion being the outermost portion of the outer cladding; and(iv) a coating layer surrounding the outer cladding, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>Δ3B, wherein, wherein said inner cladding portion is in contact with said core,−0.7%ΔC−Δ3B≧0.02% and said fiber has macrobend loss 100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN, and ΔcoreMAX>Δ2MIN, wherein −0.7%Δ3B and Δ3B−Δ3A≧0.07%, said another outer cladding portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding portion, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>Δ3B, wherein said fiber has macrobend loss 0.05%. 13. The optical fiber of claim 12, wherein the second outer cladding portion has a radial thickness from greater than or equal to about 2 microns to less than or equal to about 25 microns. 14. The optical fiber of claim 3, wherein the refractive index of the coating is 1.45 to 1.5 at 1550 nm. 15. An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ΔcoreMAX; and LP01 effective area >100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN, and ΔcoreMAX>Δ2MIN, wherein −0.7% Δ2MINΔ3B and Δ3B−Δ3A≧0.07%, said another outer cladding portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding portion, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>Δ3B, wherein the optical fiber has dispersion less than or equal to about 23 ps/nm·km at a wavelength of 1550 nm. 16. An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ΔcoreMAX; and LP01 effective area >100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN, and ΔcoreMAX>Δ2MIN, wherein −0.7%Δ3B and Δ3B−Δ3A≧0.07%, said another outer cladding portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding portion, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>Δ3B, wherein the optical fiber is a single mode optical fiber and has cable cutoff 100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN, and ΔcoreMAX>Δ2MIN, wherein −0.7%Δ3B and Δ3B−Δ3A≧0.07%, said another outer cladding portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding portion, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>→3B, wherein the difference between the refractive index delta of the coating layer and said another outer cladding portion is 0.9%>ΔC−Δ3B≧0.5%. 18. The optical fiber of claim 17, wherein said fiber has macrobend loss 100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN, and ΔcoreMAX>Δ2MIN, wherein −0.7%Δ3B and Δ3B−Δ3A≧0.07%, said another outer cladding portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding portion, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>Δ3B, wherein the difference between the refractive index delta of the coating layer and said another outer cladding portion is 1.5%>ΔC−Δ3B≧0.5%; and the difference between the refractive index delta of the another outer cladding portion and said first outer cladding portion is 1.0%>Δ3B−Δ3A≧0.05%. 21. An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ΔcoreMAX; and LP01 effective area >100 μm2 at 1550 nm;(ii) an annular inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN, and ΔcoreMAX>Δ2MIN, wherein−0.7%Δ3B and Δ3B−Δ3A≧0.07%, said another outer cladding portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding portion, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>Δ3B, wherein the core comprises a maximum relative refractive index, ΔcoreMAX relative to silica, from between −0.05% and 0.5% and essentially no germania, and the refractive index of the coating layer is 1.45 to 1.51 at 1550 nm and wherein ΔC−Δ3B≧0.5%; and the difference between the refractive index delta of the another outer cladding portion and said first outer cladding portion is 1.0%≧Δ3B−Δ3A≧0.05%.