Abstract
A feasibility study of the employment of a fiber laser working as the laser source of a Brillouin distributed sensor is presented in this paper. The erbium fiber ring laser structure designed works on the single longitudinal mode regime. The main parameters of the ring cavity are analyzed in terms of the laser requirements and the performance of a Brillouin optical time domain analysis sensor using the fiber laser as light source.
Highlights
R ESEARCH efforts in the field of optical fiber sensors have considerably increased over recent years
We propose the use of a stable configuration of Erbium Fiber Ring Laser (EFRL) as the source of a Brillouin optical time domain analyzers (BOTDAs) system
The feasibility of using a Erbium fiber ring laser as the laser source in a BOTDA sensor has been analyzed in this work
Summary
R ESEARCH efforts in the field of optical fiber sensors have considerably increased over recent years. Different solutions have been proposed in an attempt to bypass that limitation and to reach higher spatial resolutions [6]–[8] Another important improvement in BOTDA is the increase in the sensing ranges, reaching distances up to 100 km by means of coding techniques [9], or via Raman [10] or Brillouin assistance [11]. These systems have limitations with the pump and probe powers injected into the optical fiber, as some detrimental effects could appear such as non-local effects [12] or pump depletion [13]. The feasibility of using EFRLs will be demonstrated measuring hot spots at the end of a 50 km fiber under test (FUT)
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