Radio-frequency low-coherence interferometry

摘要: A method for retrieving low-coherence interferograms, based on the use of a microwave photonics filter, is proposed and demonstrated. The equivalent to double-interferometer technique, with scanning interferometer replaced by an analog fiber-optics link visibility recorded as amplitude its radio-frequency (RF) response. As interferometry system, it shows decrease resolution induced fiber’s third-order dispersion (β3). displacement sensor, provides highly linear slope-scalable readouts interferometer’s optical path difference in terms RF, even presence dispersion. In proof-of-concept experiment, we demonstrate 20-μm using C-band EDFA sources standard single-mode fiber.