We characterize the temporal response of fiber-optic components using a fiber-based frequency comb interferometer; measurements are compared and validated against a commercial instrument. The main advantage of the instrument lies in the absence of moving parts or a tunable laser, leading to very fast scanning. A measurement of a mechanical distortion, cycled at , on a fiber Bragg grating (FBG) is presented. A complete profile of the mechanical distortion is taken every ( scanning speed) and each “snapshot” is taken in . This scanning speed was arbitrarily chosen, and the instrument could be set to scan much faster, up to hundreds of kilohertz. With high-reflectivity FBGs, the same instrument could scan simultaneously the profile of 140 wavelength-multiplexed FBGs at .
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