Patent ID: 7483613

Claim:
An optical transmission system over a given spectral band, the system comprising: a given length (L 0 ) of an optical transmission fiber having, at a median wavelength (λ 0 ) of the given spectral band, a given chromatic dispersion D 0 (λ 0 ) and a given slope of the chromatic dispersion S 0 (λ 0 ); and at least two chromatic dispersion compensating fibers (DCF i ) of respective length (L i ), each dispersion compensating fiber having, at the median wavelength (λ 0 ), given values of chromatic dispersion D i (λ 0 ) and of slope of the chromatic dispersion S i (λ 0 ) that substantially satisfy the following equations: D 0 ⁡ ( λ 0 ) · L 0 + ∑ i ⁢ ( D i ⁡ ( λ 0 ) · Li ) = 0 ⁢ ⁢ ps ⁢ / ⁢ nm S 0 ⁡ ( λ 0 ) · L 0 + ∑ i ⁢ ( S i ⁡ ( λ 0 ) · Li ) = 0 ⁢ ⁢ ps ⁢ / ⁢ nm 2 wherein at least two of the dispersion compensating fibers have values for the slope of the slope of the dispersion SS i (λ 0 ) of opposite signs.