title: Limitations and strategies to improve measurement accuracy in differential pulse-width pair Brillouin optical time-domain analysis sensing.
abstract: In this work, we analyze the effects of Brillouin gain and Brillouin frequency drifts on the accuracy of the differential pulse-width pair Brillouin optical time-domain analysis (DPP-BOTDA). In particular, we demonstrate numerically that the differential gain is highly sensitive to variations in the Brillouin gain and/or Brillouin shift occurring during the acquisition process, especially when operating with a small pulse pair duration difference. We also propose and demonstrate experimentally a method to compensate for these drifts and consequently improve measurement accuracy.
authors.affiliation: Dipartimento di Ingegneria Industriale e dell’Informazione—Seconda Università di Napoli, Via Roma, 29, Aversa 81031, Italy. aldo.minardo@unina2.it
authors.forename: Aldo
authors.initials: A
authors.lastname: Minardo
authors.forename: Romeo
authors.initials: R
authors.lastname: Bernini
authors.forename: Luigi
authors.initials: L
authors.lastname: Zeni