title: Improved time-resolved acousto-optic technique for optical fiber analysis of axial non-uniformities by using edge interrogation.
abstract: The time-resolved acousto-optic technique demonstrated recently to be a very useful method for the analysis of fiber axial non-uniformities, able to detect variations of fiber diameter in the nanometric scale with a spatial resolution of few cm. An edge interrogation approach is proposed to improve further the performance of this technique. The detection of subnanometer fiber diameter changes or sub-ppm changes of the core refractive index is demonstrated.
authors.forename: E P
authors.initials: EP
authors.lastname: Alcusa-Sáez
authors.forename: A
authors.initials: A
authors.lastname: Díez
authors.forename: M
authors.initials: M
authors.lastname: González-Herráez
authors.forename: M V
authors.initials: MV
authors.lastname: Andrés