COTDR performance optimization for amplified transmission systems

COTDR performance optimization for amplified transmission systems

Two different cross-coupling schemes that allow coherent optical time-domain reflectometry (COTDR) on an amplified transmission system have been tested. A COTDR dynamic range of 109 km (56 km) with a coupling between the upstream repeater output to the downstream repeater input (output) has been dem...

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Veröffentlicht in:IEEE photonics technology letters 1997-07, Vol.9 (7), p.1041-1043
Hauptverfasser: Gautheron, O., Leroy, J.B., Marmier, P.
Format: Artikel
Sprache:eng
Schlagworte:
Couplings
Dynamic range
High speed optical techniques
Optimization
Polarization
Reflectometry
Repeaters
Stimulated emission
System testing
Time domain analysis
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Beschreibung
Zusammenfassung:Two different cross-coupling schemes that allow coherent optical time-domain reflectometry (COTDR) on an amplified transmission system have been tested. A COTDR dynamic range of 109 km (56 km) with a coupling between the upstream repeater output to the downstream repeater input (output) has been demonstrated on a 900-km test-bed, When the data are launched in both directions at the same wavelength, the impact of the coherent Rayleigh noise on the transmission has been evaluated. The penalty is negligible if a high speed polarization scrambling is used and the launched power per wavelength is kept below +2 dBm.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.593393