SLEDs are used in the diagnostics of optical networks. Several fiber optic measurement techniques like Wavelength Drift Monitoring, Chromatic Dispersion and Polarization Mode Dispersion exploit the characteristics of SLEDs, taking advantage of their large bandwidth, high power spectral density, low ripple and operating wavelengths extending in the C and L communication bands.

Fiber Optic Test Equipment that is designed to perform Polarization Mode Dispersion (PMD) measurements in the C and L bands can take advantage of the wide optical spectrums and high power densities offered by the EXALOS SLEDs in the 1300nm and 1550nm bands.