| 主权项 |
1. Method for supervising a set of optical fibres of an Optical Network, the method being characterized by comprising the steps of:
a) assigning to each fibre of the set of fibres an unique binary code of L bits, where said binary code is defined by a set of L polarization sensitive optical filters located in each fibre, each filter being tuned at a different wavelength of a set of L wavelengths {λ1, λ2. . . , λL}, being L a design parameter, and being sensitive to one of two orthogonal polarization components, where each bit of the binary code is defined by the polarization component to which each filter of the set is sensitive, being the binary code assigned to each fibre different from the binary code assigned to the rest of fibres of the set of fibres b) injecting a different light signal at an input of said Optical Network for each fibre to be supervised, where said light signal is the result of mapping a binary sequence into polarized light pulses, each polarized light pulse being centred at a certain wavelength of the set of L wavelengths and having a polarization which will depend on the binary code assigned to each fibre to be supervised c) for each injected signal, receiving the light signal reflected from the set of fibres by an optical receiver sensitive to wavelength and polarization, and d) determining if there has been a failure in the set of fibres and the fibre where the failure is located by analysing the received light signals. |
