Characterization of wavelength-selective fiber-optic devices using a modified phase-shift method

We present a novel measurement setup that can be used for the complete char acterization of fiber Bragg gratings and wavelength selective fiber-optic d evices. Our setup is based on the phase-shift method (PSM), which we have m odified to include the measurement of polarization-induced effects such as polarization-dependant loss (PDL) and polarization-mode dispersion (PMD), W e measure the spectral response of devices used in transmission and in refl ection, the wavelength dependency of the group delays due to chromatic and polarization-mode dispersion, and the wavelength dependency of the polariza tion-dependent loss. Experimental results are presented and sources of erro r are discussed. Comparisons with the Jones matrix eigenanalysis method for the measurement of PDL and differential group delay due to PMD have been c arried out.