Crack monitoring using short-gauged Brillouin fiber optic sensor

Detection and quantification of cracks for various civil infrastructures on a large scale are difficult both technologically economically through current sensing methodologies. This study presents novel fiber-optic sensor named short-gauged Brillouin fiber optic sensor, which enables basic Brillouin-based analyzers to achieve early crack detection accurate width measurement. The concept design the proposed firstly introduced, followed by respective instrumentation procedures. On this basis, theoretical deduction numerical simulations crack-induced gain spectrum (BGS) response using carried out, verified subsequently controlled laboratory tests. measured BGS responses then leveraged quantification. A peak-fitting-based methodology was adopted analyze data may facilitate economical long-distance distributed as generic technique.