title: Dynamic BOTDA measurements based on Brillouin phase-shift and RF demodulation.
abstract: We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase-shift in addition to the conventional Brillouin gain. This provides the advantage of measurements that are largely immune to variations in fiber attenuation or changes in pump pulse power. Furthermore, the optical detection deployed leads to an enhanced precision or measurement time and to the broadening of the measurement range. Proof-of-concept experiments demonstrate 1.66-kHz measurement rate with 1-m resolution over a 160 m sensing fiber length. Moreover, a measurement range of 2560 µε with a precision of 20 µε is successfully proved.
authors.affiliation: Departamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Pamplona, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Urricelqui
authors.forename: Ander
authors.initials: A
authors.lastname: Zornoza
authors.forename: Mikel
authors.initials: M
authors.lastname: Sagues
authors.forename: Alayn
authors.initials: A
authors.lastname: Loayssa
mesh_terms: D000465:Algorithms; D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D004867:Equipment Design; D006801:Humans; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014159:Transducers