Patent ID: 9385813
Filing Date: 2016-07-05
CPC Classification: G02B,H04B

Claim Text:
1. An optical fiber transmission line used for a span between two repeaters, comprising (N+1) number of optical transmission fibers of the same kind, wherein (N+1) number of the optical transmission fibers are connected in series between two connection fibers provided respectively in the two repeaters, and the value of the following formula: is 1.5 dB or less, wherein the average value of the mode field diameter of each of the two connection fibers is W′, the average value of the mode field diameter of each of (N+1) number of the optical transmission fibers is W, and the axial misalignment width at the splice point of the two connection fibers and (N+1) number of the optical transmission fibers is d, wherein the two connection fibers are based on International standard ITU-T G.652 standard.