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

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 rin...

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Bibliographic Details
Published in:Journal of lightwave technology 2015-06, Vol.33 (12), p.2439-2444
Main Authors: Diaz, S., Leandro, D., Lopez-Amo, M.
Format: Article
Language:English
Subjects:
Cavity resonators
Detection
Erbium
Erbium-doped fiber (EDF)
Erbium-doped fiber lasers
fiber Bragg grating (FBG)
Fibers
Instability
Laser feedback
multi-wavelength lasing
Optical fiber sensors
Optical fibers
Remote sensing
Ring lasers
Sensor arrays
single-longitudinal-mode (SLM)
Temperature measurement
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Summary: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.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2014.2365257