Low loss large effective area single mode fibers are designed and fabricated. The effective area and attenuation at 1550 nm wavelength are 130μm

2

and 0.182 dB/km respectively

and the macrobending loss at 1625 nm（Φ60 mm×100 turns） is 0.013 dB. Compared with the transmission performance of G.652 fibers

the FOM contribution of large effective area fibers are 2.23 dB.