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Extension of measurement range in OCDR based on double-modulation scheme (2309.00620v1)
Published 20 May 2023 in physics.ins-det and physics.optics
Abstract: We extend the measurement range of optical correlation-domain reflectometry (OCDR) by modulating the laser output frequency at two frequencies, while preserving spatial resolution. We demonstrate distributed reflectivity sensing with a ten-fold extended measurement range.