Virtual FBGs using saturable absorbers for sensing with fiber lasers
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Rodríguez Cobo, Luis



Date
2018-10-23Derechos
Attribution 4.0 International
Publicado en
Sensors, 2018, 18(11), 3593
Publisher
MDPI
Palabras clave
Fiber bragg gratings
Erbium doped fibers
Fiber lasers
Single-mode laser
Temperature sensor
Fiber optics sensors
Abstract:
The spectral narrowing of Fiber Bragg Gratings (FBGs) introduced by unpumped Er-doped fiber (EDF) was analyzed for fiber lasers (FL). Owing to spatial hole burning (SHB), the spectral response of a virtual FBG can be employed for narrowing the band pass filter employed to determine the lasing wavelength of laser cavities. A common FL was mounted to analyze the spectral stability of the method, and a FL sensor for strain and temperature measurements was experimentally characterized to determine the stability of the narrowing effect achieved by the unpumped EDF, which acts as a virtual FBG. The results exhibited remarkably good narrowing effects of the spectral response of uniform FBGs.
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