Single-end hybrid Rayleigh Brillouin and Raman distributed fiber-optic sensing system

https://phys.org/news/2023-07-single-end-hybrid-rayleigh-brillouin-raman.html

"single-mode fiber sensor temperature, strain and vibration information of optical fiber... hybrid system 1 light source, 2 receiving ends and 1 access... real-time monitoring large structure, automated control and perimeter security... smart city construction... phase-sensitive optical time-domain reflectometry... Rayleigh scattering vibration sensing, probe of Brillouin scattering temperature and strain measurement. Raman scattering overcome temperature-strain cross sensitivity"

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