9. Glossary

COTDR

Refers to the two possible techniques used to detect the backscattered signal and locate an optical fault on the line fiber: direct detection and sequence correlation (Correlation Optical Time Domain Reflectometry) or coherent detection (Coherent Optical Time Domain Reflectometry).

DSF; Dispersion Shifted Fiber

Designates the first type of fiber used in optical amplification submarine links, and is characterized by chromatic dispersion that cancels out at a wavelength around 1,560 nm, as opposed to earlier optical fibers whose chromatic dispersion cancels out in the window around 1,300 nm.

Dispersion Slope Matched Fiber DSMF

Designates the third type of fiber used in optical amplification submarine links; this fiber is characterized by a cumulative chromatic...