EXFO FTB-5800 Chromatic Dispersion Analyzer for FTB-400 - Manual (Page 98)

Measuring Chromatic Dispersion: Theory
92 FTB-5800
Helping You Manage Chromatic Dispersion
Helping You Manage Chromatic Dispersion
The zero-dispersion wavelength (where dispersion is at zero) corresponds
to the wavelength point at which the fiber under test reaches its maximum
bandwidth. The slope from this zero-dispersion point indicates how fast
dispersion rises as wavelength increases. Key chromatic dispersion
parameters are the dispersion zero and the slope at zero dispersion.
Getting precise chromatic dispersion parameters helps you choose the
right dispersion-compensated fiber or material in order to reverse the
dispersion and dispersion slope before the data is interpreted by the
receiver at the other end of the line.
The effects of chromatic dispersion decrease with a reduction in the
absolute value of the fiber chromatic dispersion or with dispersion
compensation.