Study of the possibility of the optical fiber condition monitoring using phase-sensitive OTDR. Part I: acoustic emission testing

The paper presents the study of a phase-sensitive reflectometer's potential for recording acoustic emission signals from the early stages of optical fiber defect growth. The methods of registering acoustic emissions and two possible ways of forming defects in the optical fiber are described. As a result, it is demonstrated that pulsed acoustic emissions can be recorded during the process of defect formation on the optical fiber surface.