Patent ID: 8498536

Claim:
A method for transmitting data through an optical transmission system from a first place ( 4 ) to a second place ( 5 ), wherein said transmission system has at least a light generating sender, a transmission path ( 2 ) having at least one fiber ( 1 ) and one receiver, and comprises the following procedural steps: Generating a measuring signal (λ measurement ) of at least one wavelength which differs from the wavelengths of a data signal (λ 1 , . . . , λ N ) that includes the data to be transmitted, Coupling the measuring signal (λ measurement ) into at least one fiber ( 1 ) of the optical transmission system, Providing a reflector ( 6 ) for wavelength-selective reflection, allowing the measuring signal (λ measurement ) to be reflected after having passed through a section of the fiber ( 1 ), Decoupling the reflected measuring signal (λ measurement ) from the fiber ( 1 ), Comparing the coupled measuring signal (λ measurement ) and the decoupled reflected measuring signal (λ measurement ), and at least determining the dispersion in the fiber by comparing the coupled measuring signal (λ measurement ) and the decoupled reflected measuring signal (λ measurement ), wherein an initial modulation frequency (f measurement ) is adapted to a boundary condition of 1/f measurement larger than approximately twice the run time of the measuring signal (λ measurement ).