Abstract: An apparatus and method of pre-emphasising a launch power profile of a section in an optical network is provided. The method comprises measuring the output power at the output of the section, determining the predicted output power associated with a flat launch power profile using design characteristics of the section and determining the total power deviation between the measured output power and the predicted output power. Also, the method comprises determining the signal to noise ratio deviation and the nonlinear phase shift deviation as a function of the total power deviation, and pre-emphasising the launch power profile based on a function of the calculated signal to noise ratio deviations of each span and the calculated nonlinear phase shift deviations of each span, such that the sum of the nonlinear phase shift deviations and the sum of the signal to noise ratio deviations of each channel are reduced by an equal amount.

Abstract: An apparatus and method of pre-emphasising a launch power profile of a section in an optical network is provided. The method comprises measuring the output power at the output of the section, determining the predicted output power associated with a flat launch power profile using design characteristics of the section and determining the total power deviation between the measured output power and the predicted output power. Also, the method comprises determining the signal to noise ratio deviation and the nonlinear phase shift deviation as a function of the total power deviation, and pre-emphasising the launch power profile based on a function of the calculated signal to noise ratio deviations of each span and the calculated nonlinear phase shift deviations of each span, such that the sum of the nonlinear phase shift deviations and the sum of the signal to noise ratio deviations of each channel are reduced by an equal amount.

Abstract: Embodiments of the present invention relate to an optical signal processing system and method that uses, for example, four-wave mixing to produce a wavelength converted optical data-bearing signal having a power level that is proportional to at least the square of the power level of an optical data-bearing signal.

Abstract: The invention relates to the detection of parameters that are representative of a state associated with an automobile windscreen (1), by optical means. The inventive device comprises a module (20) that is sensitive to at least one of the aforementioned parameters and which is at least partially embedded in a layer (11) of the windscreen. Said windscreen comprises two glass panels (10a, 10b), which are separated by a spacer comprising the part of the module (20) that is embedded.