title: Distributed strain measurement based on a fiber Bragg grating and its reflection spectrum analysis.
abstract: A method of extracting the strain profile along a fiber Bragg grating from the intensity reflection spectrum is described. The procedure is based on a filter synthesis theory that relates the aperiodicity of a grating with its reflection spectrum. To illustrate the approach, we measured the strain profile near a hole in a plate and obtained a strain resolution of 80 micro. The spatial resolution depends on the strain gradient; i.e., the higher the gradient, the better the resolution. A resolution of 0.8 mm was achieved for a 5-mm grating with a gradient of 250 micro/mm.
authors.forename: M
authors.initials: M
authors.lastname: Leblanc
authors.forename: S Y
authors.initials: SY
authors.lastname: Huang
authors.forename: M
authors.initials: M
authors.lastname: Ohn
authors.forename: R M
authors.initials: RM
authors.lastname: Measures
authors.forename: A
authors.initials: A
authors.lastname: Guemes
authors.forename: A
authors.initials: A
authors.lastname: Othonos