FOTP-243 Polarization-mode Dispersion Measurement for Installed Single-mode Optical Fibers by Wavelength-scanning OTDR and states-of-polarization analysis
This procedure is restricted to wavelengths at which the fiber is effectively single-mode. The cutoff wavelength of an un-cabled fiber may be determined by FOTP-80, while the cutoff wavelength of a cabled fiber may be determined by FOTP-170. This method is intended for installed cabled fibers without amplification, with PMD values in the range 0.1 to 20 ps.