The invention discloses a low-loss large-effective area single mode
fiber and a manufacturing method of the low-loss large-effective area single mode
fiber, and relates to the field of optical fibers. The low-loss large-effective area single mode
fiber comprises a
quartz glass cladding, an internal
coating and an external
coating, wherein the
quartz glass cladding, the internal
coating and the external coating are arranged in sequence from inside to outside; the inside of the
quartz glass cladding comprises a first fiber core area, a second fiber core area, a third fiber core area, a fourth fiber core area and a
refractive index concave cladding, wherein the first fiber core area, the second fiber core area, the third fiber core area, the fourth fiber core area and the
refractive index concave cladding are arranged in sequence from inside to outside; the
refractive index concave cladding is subjected to deposition through a PCVD process; the quartz glass cladding is manufactured through an OVD process or a sleeving process. According to the low-loss large-effective area single mode fiber and the manufacturing method of the low-loss large-effective area single mode fiber, the
scattering loss of the low-loss large-effective area single mode fiber and the additional loss of the low-loss large-effective area single mode fiber in a bent state can be reduced; due to the fact that the spire distribution of fiber core
basic mode electromagnetic field power is adjusted into
flattop distribution,
optical power density is reduced, the effective area of the low-loss large-effective area single mode fiber is enlarged, the nonlinearity of the low-loss large-effective area single mode fiber is reduced, the incident power of an
optical fiber communication
system is increased by 0.4-2.6 dB, and the low-loss large-effective area single mode fiber is suitable for
mass production.