Patent ID: 7881610

Claim:
A method of transmitting an optical signal in an optical transmission system, said method comprising: providing a length of an optical fiber having a zero chromatic dispersion wavelength, wherein said optical fiber belongs to an optical fiber group and wherein said optical fiber group comprises optical fibers having a zero chromatic dispersion wavelength that is unknown but comprised within a wavelength range having a minimum zero dispersion wavelength and a maximum zero dispersion wavelength and wherein a fiber specification of said optical fiber group determines said minimum zero dispersion wavelength and said maximum zero dispersion wavelength; estimating a tolerated chromatic dispersion range using said provided length of said optical fiber; transmitting said optical signal over said length of optical fiber at a first transmission wavelength, wherein it further comprises: estimating, within said wavelength range, at least one wavelength sub-range, said at least one wavelength sub-range being such that an optical signal is affected by a chromatic dispersion which is comprised within said tolerated chromatic dispersion range when said optical signal is transmitted at any wavelength of said at least one sub-range, and over any optical fiber of at least one optical fiber sub-group of said optical fiber group, wherein said first transmission wavelength is comprised within said at least one wavelength sub-range.