@article{Clement:20,
author = {Juan Clement and Haroldo Maestre and Germ\'{a}n Torregrosa and Carlos R. Fern\'{a}ndez-Pousa},
journal = {Opt. Express},
keywords = {Absolute distance measurement; Fourier transform spectroscopy; Low coherence interferometry; Modulation techniques; Signal processing; Temporal resolution},
number = {21},
pages = {30432--30446},
publisher = {OSA},
title = {Phase sensitive low-coherence interferometry using microwave photonics},
volume = {28},
month = {Oct},
year = {2020},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-28-21-30432},
doi = {10.1364/OE.403176},
abstract = {We report on a low-coherence interferometer based on Microwave Photonics (MWP) which allows, for the first time to the best of our knowledge, stable determination of the interferogram\&\#x2019;s phase. The interferometer is built on suppressed carrier, double-sideband modulation, dispersive propagation in a chirped fiber Bragg grating, demodulation by electro-optical frequency down-conversion, and suitable signal processing techniques to account for modulation impairments. Taking as a reference a direct normalization of the link\&\#x2019;s microwave response, the system retrieves high-resolution interferograms, both in amplitude and phase and free from distortion induced by higher-order dispersion, in an optical path difference of 16.3 mm, surpassing previously reported values based on MWP implementations. We present representative applications targeted to the characterization of C-band sources and components, such as direct analysis of interferograms with 5.5 fs temporal resolution, Fourier-transform spectroscopy with 14 GHz spectral resolution, and optical low-coherence reflectrometry of the impulse response\&\#x2019;s amplitude of fiber Bragg gratings with 0.55 \&\#x03BC;m spatial resolution.},
}