| 摘要 |
<p>A method for monitoring a system using optical reflectometry comprises: receiving a first optical response signal coming from the system in response to a first optical excitation signal, said first excitation signal carrying a first numeric sequence (A), receiving a second optical response signal coming from the system in response to a second optical excitation signal, said second excitation signal carrying a second numeric sequence (1A, B), and determining correlations between said optical response signals and said numeric sequences in order to detect a singularity of the system. The first and second excitation signals are transmitted simultaneously within the optical system on separate carrier wavelengthsλ0,λ1) by wavelength division multiplexing, and the first and second response signals are received simultaneously on said separate carrier wavelengths.</p> |
