| 摘要 |
An optical telecommunications network terminal ( 12 ) includes a device ( 22 ) for generating downlink optical signals and a device ( 48 ) for receiving uplink optical signals, the optical signals being conveyed in optical transmission means ( 16, 20 ) connected to the terminal ( 12 ). More particularly, the generator device ( 48 ) is adapted to generate a continuous optical signal at wavelength lambda<SUB>ii </SUB>and having an initial power greater than a power threshold for the occurrence of a stimulated Brillouin effect, above which threshold said continuous optical signal induces in the optical transmission means ( 16, 20 ) a continuous Brillouin backscattering uplink optical signal at wavelength lambda'<SUB>ii</SUB>. The optical signal receiver device ( 48 ) further includes means ( 60 ) for analyzing the power of said continuous Brillouin backscattering optical signal at wavelength lambda'<SUB>ii</SUB>.
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