Fabrication of Ultra-Weak Fiber Bragg Grating (UWFBG) in Single-Mode Fibers through Ti-Doped Silica Outer Cladding for Distributed Acoustic Sensing

Abstract

UWFBG was fabricated in single-mode fiber through Ti-Doped Silica Outer Cladding using KrF 248-nm excimer laser for phase-sensitive distributed acoustic sensing (DAS). This paper suggests a new approach to produce sensing fibers for DAS.