COTDR performance optimization for amplified transmission systems

Author

Gautheron, O. ; Leroy, J.B. ; Marmier, P.

Author_Institution

Alcatel Submarine Network, La Ville du Bois, France

Volume

9

Issue

7

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

1041

Lastpage

1043

Abstract

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.

Keywords

Rayleigh scattering; backscatter; fibre lasers; optical fibre communication; optical fibre couplers; optical fibre polarisation; optical noise; optical repeaters; optical time-domain reflectometry; optimisation; 109 km; 56 km; 900 km; COTDR dynamic range; COTDR performance optimization; amplified transmission system; amplified transmission systems; coherent Rayleigh noise; coherent optical time-domain reflectometry; cross-coupling schemes; downstream repeater input; high speed polarization scrambling; launched power; upstream repeater output; Couplings; Dynamic range; High speed optical techniques; Optimization; Polarization; Reflectometry; Repeaters; Stimulated emission; System testing; Time domain analysis;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.593393

Filename

593393