In Brillouin optical correlation-domain reflectometry (BOCDR), spatial resolution relies on the modulation amplitude of the light. We propose a Rayleigh-based method that utilizes the spectral width of Rayleigh-induced noise to measure this amplitude without altering the setup or requiring an optical spectrum analyzer. With high frequency resolution and ease of implementation, our approach enhances the convenience and accuracy of spatial resolution evaluation in BOCDR.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10998833PMC
http://dx.doi.org/10.1038/s41598-024-56426-2DOI Listing

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