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Optical Engineering • Open Access

Optical bend sensor based on a long-period fiber grating monitored by an optical time-domain reflectometer

Paper Abstract

We report an alternative technique to interrogate a long-period fiber grating (LPG) when the grating sensitivity is based on the peak amplitude changes of the resonant wavelength. To read the amplitude changes, a conventional optical domain reflectometer was used. Bend measurements were performed to apply such method and to determine the grating sensitivity for this physical parameter. Reflective measurements, temperature insensitive, and the possibility of multiplexing LPG sensors are some advantages offered by this technique.

Paper Details

Date Published: 1 November 2005
PDF: 3 pages
Opt. Eng. 44(11) 110502 doi: 10.1117/1.2123267
Published in: Optical Engineering Volume 44, Issue 11
Show Author Affiliations
Orlando Frazão, Univ. do Porto (Portugal)
Rosane Falate, Ctr. Federal de Educação Tecnológica do Paraná (Brazil)
Jose Manuel Baptista, Instituto Superior de Engenharia do Porto (Portugal)
Jose Luis Fabris, Ctr. Federal de Educação Tecnológica do Paraná (Brazil)
Jose Luis Santos, Univ. do Porto (Portugal)


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