Ultrahigh-speed distributed Brillouin reflectometry.

ABSTRACT: Optical fibre sensors based on Brillouin scattering have been vigorously studied in the context of structural health monitoring on account of their capacity for distributed strain and temperature measurements. However, real-time distributed strain measurement has been achieved only for two-end-access systems; such systems reduce the degree of freedom in embedding the sensors into structures, and furthermore render the measurement no longer feasible when extremely high loss or breakage occurs at a point along the sensing fibre. Here, we demonstrate real-time distributed measurement with an intrinsically one-end-access reflectometry configuration by using a correlation-domain technique. In this method, the Brillouin gain spectrum is obtained at high speed using a voltage-controlled oscillato

SUBMITTER: Mizuno Y 

PROVIDER: S-EPMC6059889 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature