Zhu, MengshiLeandro González, DanielLópez-Amo Sáinz, ManuelMurayama, Hideaki2020-01-072020-04-1520190146-959210.1364/OL.44.001884https://academica-e.unavarra.es/handle/2454/36010The authors proposed a quasi-distributed vibration sensing technique using in-line weak reflectors and optical frequency domain reflectometry (OFDR). As a result, they achieved an 8 kHz measurable vibration frequency with a 15-20 cm spatial resolution employing a low repetition rate (similar to 8 Hz). Moreover, a measurable frequency of 30 kHz was achieved for a 1.5 m spatial resolution. The ability of the system to determine the frequency and amplitude of several sections vibrating simultaneously is evaluated for different configurations. Because of the simple arrangement, high detectable frequency, and high sensitivity, this approach is expected to be especially well suited for mechanical vibration sensing applications, particularly in medium-sized structures.6 p.application/pdfeng© 2019 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.Quasi-distributed vibrationOptical frequency domain reflectometry (OFDR)Weak reflectorsinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess