OPTICAL FIBER SUITABLE FOR HIGH-SPEED LARGE-SCALE WDM SYSTEM, OPTICAL TRANSMISSION LINE AND OPTICAL TRANSMISSION SYSTEM USING THE SAME

摘要

PURPOSE: An optical fiber suitable for a high-speed, vast-amount WDM(Wavelength Division Multiplexing) system, an optical transmission line and an optical communication system using the same are provided to optimize distribution, distribution slope, and an effective cross sectional area of the optical fiber. CONSTITUTION: An optical fiber suitable for a high-speed, vast-amount WDM system includes a first core region having a radius of r1 and a refraction ratio difference of Δ1, a second core region having a radius of r2 and a refraction ratio difference of Δ2, a third core region having a radius of r3 and a refraction ratio difference of Δ3, and a fourth core region having a radius of r4 and a refraction ratio difference of Δ4. the radii satisfy r1 r2 r3r4. The refraction ratio differences satisfy Δ2Δ1 and Δ2 Δ3. The operational wavelength lies between 1460 and 1625nm.