Publication: Sagnac interferometer based optical coherence tomography
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Date
2024
Authors
Shalaby A.M.
Shalaby M.
Journal Title
Journal ISSN
Volume Title
Publisher
Ain Shams University
Abstract
We present in this paper an all-fiber Optical Coherence Tomography OCT system in the time domain by employing a Sagnac fiber loop. The optical fiber version of TD-OCT uses directional couplers to construct a Michelson interferometer instead of a beam splitter which is used in the bulk optics version. Instead of implementing the optical delay by an external movable mirror, we present a new configuration that employs a Sagnac interferometer. Avoiding the use of an external movable mirror, eliminates the problems of alignment to couple back the optical signal into the fiber after being delayed by the external mirror. Moreover, this all-fiber system has the advantage of being compact and having large values of optical path difference. ? 2023 Faculty of Engineering, Ain Shams University
Description
Keywords
Fiber optic sensors , Michelson interferometers , Mirrors , Optical fibers , All fiber , Bulk optics , Fiber-optical , Michelson's interferometer , Movable mirrors , Optical delay , Optical signals , Sagnac fiber loop , Sagnac interferometer , Time domain , Optical tomography