OPTICAL TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To solve the problem associated with the degradation in the transmission characteristics of signal light beams caused by four light wave mixing generated by the signal light and stimulated light or stimulated lights themselves and a nonlinear effect between pulses of the signal light. SOLUTION: The system is constituted of a signal light source, a stimulating light source which Raman amplifies the signal light outputted from the signal light source, an optical fiber which transmits the signal light and becomes a medium to Raman amplifies the signal light, a means which inputs the stimulated light into the fiber and a means which inputs the signal light into the fiber. The zero dispersion wavelength of the fiber is set to the wavelength that is out of the wavelength band between the stimulated wavelength and the wavelength of the signal light.