Optical fiber for single mode transmission, and process for producing single mode optical fiber

摘要

'' OPTICAL FIBER FOR SINGLE MODE TANSMISSION, AND, PROCESS TO PRODUCE SINGLE MODE OPTICAL FIBER '' an optical fiber for transmission for use in a wavelength division multiplex transmission system is disclosed. The transmission fiber includes an inner core surrounded by a first, a second and at least a third layer of glass along the length of the fiber. The first glass layer has a difference of depressed refractive index and the second layer of glass has a difference of substantially zero refractive index. The third layer of glass has a positive refractive index difference. The fiber has an improved relationship between the slope of the dispersion and the volume of the depressed profile. The fiber may have a dispersion value of at least 1.5 ps / nm / km and a dispersion slope of less than approximately 0.07 ps / nm² / km over an extended range of conductive wavelengths for the system transmission, such as the 1450 - 1650 nm range.