OPTICAL FIBER WITH LARGE MODE FIELD DIAMETER AND LOW MICROBENDING LOSSES

摘要

optical fiber is 1310 nm or more from 8.8 m mode field diameter, at 1550 nm 0.03 dB / km less than the wire mesh cover of a drum micro-bending loss, and cutoff wavelength of 1320 nm of less than 2m have. The fiber is first coated with the in situ modulus of the central core region, inner cladding region, the outer cladding region, in-situ modulus of less than 0.20 MPa, and a first coating with a glass transition temperature of -35 & 0 & C of less than, and greater than 1500 MPa the like. The fibers may further include a down index cladding region. The relative refractive index of the central core region is relatively larger than the refractive index of the outer cladding region is greater than the relative refractive index of the inner cladding region. The fibers can be produced from 30 m / s or more pull-out speed. ;