Patent ID: 6748152
Filing Date: 2004-06-08
Classification: G02B,H04B

Abstract:
An optical transmission system comprising:an optical fiber transmission line having a zero-dispersion wavelength of 1350 nm to 1440 nm and a cable cutoff wavelength band of less than 1368 nm, said optical fiber transmission line transmitting signal light at least in a wavelength band from 1450 nm to 1530 nm (S band) and Raman-amplifying said signal light in S band when Raman amplification pumping light is supplied thereto; and Raman amplification pumping light supplying means for supplying said Raman amplification pumping light to said optical fiber transmission line, wherein said optical fiber transmission line has a transmission loss of 0.5 dB/km or less at a wavelength of 1380 nm.