Stable Multiwavelength Erbium Fiber Ring Laser With Optical Feedback for Remote Sensing

Author

Diaz, S. ; Leandro, D. ; Lopez-Amo, M.

Author_Institution

Dept. of Electr. & Electron. Eng., Public Univ. of Navarra, Pamplona, Spain

Volume

33

Issue

12

fYear

2015

fDate

June15, 15 2015

Firstpage

2439

Lastpage

2444

Abstract

In this paper, we demonstrate a stable fiber sensing system for remote temperature measurements, where the sensing element is an array of four fiber Bragg gratings and sensor interrogation is achieved with a multiwavelength erbium fiber ring laser. By introducing a feedback fiber loop in a fiber ring cavity, four laser emission lines were obtained simultaneously in single-longitudinal mode operation (SLM). The power instability obtained was lower than 0.5 dB with an optical signal-to-noise ratio higher than 50 dB for all the emitted wavelengths. The application of this system for remote temperature measurements has been demonstrated even though the SLM regime cannot be preserved.

Keywords

Bragg gratings; erbium; fibre lasers; fibre optic sensors; laser arrays; laser cavity resonators; laser feedback; laser modes; laser noise; laser stability; measurement by laser beam; remote sensing; ring lasers; feedback fiber loop; fiber Bragg grating array; laser emission lines; multiwavelength erbium fiber ring laser cavity; optical feedback; optical signal-to-noise ratio; power instability; remote sensing; remote temperature measurements; sensor interrogation; single-longitudinal mode operation; Cavity resonators; Erbium-doped fiber lasers; Laser feedback; Optical fiber sensors; Optical fibers; Temperature measurement; Erbium-doped fiber (EDF); fiber Bragg grating (FBG); multi-wavelength lasing; single-longitudinal-mode (SLM); single-longitudinal-mode (SLM).;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2014.2365257

Filename

6936847