OPTICAL TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To actualize long-distance transmission of high-density WDM. SOLUTION: An optical transmission device 10 multiplexes signal light of odd-numbered wavelength channels with a multiplexer 24a and signal light of even-numbered wavelength channels with a multiplexer 24b. A polarized wave multiplexer 26 multiplexes the even-numbered and odd-numbered wavelength channels with mutually orthogonal polarized waves and outputs the resulting light to an optical transmission line 12. An optical fiber 32 having large effective sectional area is arranged right behind an optical amplifier repeater 30 on the optical transmission line 12 and an optical fiber 34 having a small dispersion slope is arranged right behind it. Dispersion compensating fibers 36 are arranged at proper intervals and a gain equalizer 28 is arranged. The mean dispersion slope of the system is <=0.07 ps/nm2/km.