| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical transmission system which allows high quality transmission of signal light where a plurality of signal channels are multiplexed, and has a configuration that is particularly suitable for CWDM optical transmission. <P>SOLUTION: The plurality of signal channels propagating through an optical fiber transmission line 30 are demultiplexed into a signal channel group of a first wavelength band Λ<SB>1</SB>and a signal channel group of a second wavelength band Λ<SB>2</SB>by a demultiplexer 22. Each signal channel in the second wavelength band Λ<SB>2</SB>where the absolute value of chromatic dispersion is large is dispersion-compensated by a dispersion compensator 23. When the bit rate is B (Gb/s) at a specific wavelength in the second wavelength band Λ<SB>2</SB>where the total chromatic dispersion in the optical fiber transmission line 30 and the dispersion compensator is maximum, the chromatic dispersion value at the specific wavelength is set to be grater than 0 (ps/nm) but 7,500/B<SP>2</SP>(ps/nm) or less, and is set such that, the loss in the second wavelength band Λ<SB>2</SB>is lower than the maximum loss in the first wavelength band Λ<SB>1</SB>. <P>COPYRIGHT: (C)2004,JPO |
