Virtual FBGs Using Saturable Absorbers for Sensing with Fiber Lasers

Sensors

卷:18

José M. Lopez-Higuera¹  Luis Rodriguez-Cobo¹  Rosa A. Perez-Herrera²  Manuel Lopez-Amo²  María A. Quintela³  Rubén Ruiz-Lombera³ 

[1]CIBER-bbn, Instituto de Salud Carlos III, 28029 Madrid, Spain

[2]|Department of Electrical Electronic and Communication Engineering and Institute of Smart Cities (ISC), Public University of Navarra, 31006 Pamplona, Spain

[3]|Photonics Engineering Group, University of Cantabria, 39005 Santander, Spain

关键词: fiber bragg gratings;    erbium doped fibers;    fiber lasers;    single-mode laser;    temperature sensor;    fiber optics sensors;   

DOI  :  10.3390/s18113593

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown