&lt;title&gt;Flight tests of a fiber-optic interferometric strain gauge&lt;/title&gt;

Fuerstenau, N.; Janzen, Douglas D.; Schmidt, W.

doi:10.1117/12.141331

Cited by 2 publications

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Fiber Optics Sensors

Güemes

Sierra-Pérez

2013

CISM International Centre for Mechanical Sciences

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We report the first experimental demonstration of a humidity insensitive polymer optical fiber Bragg grating (FBG), as well as the first FBG recorded in a TOPAS polymer optical fiber in the important low loss 850nm spectral region. For the demonstration we have fabricated FBGs with resonance wavelength around 850 nm and 1550 nm in single-mode microstructured polymer optical fibers made of TOPAS and the conventional poly (methyl methacrylate) (PMMA). Characterization of the FBGs shows that the TOPAS FBG is more than 50 times less sensitive to humidity than the conventional PMMA FBG in both wavelength regimes. This makes the TOPAS FBG very appealing for sensing applications as it appears to solve the humidity sensitivity problem suffered by the PMMA FBG.

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Fiber Optics Sensors

Güemes

Sierra-Pérez

2013

CISM International Centre for Mechanical Sciences

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An intensity-based optical fibre sensor for fatigue damage detection in advanced fibre-reinforced composites

Badcock

Fernando

1995

Smart Mater. Struct.

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The detection of fatigue-induced damage within fibre-reinforced composite materials is of vital importance in areas where these materials are used for critical load-bearing applications. Embedded fibre-optic sensors are suitable for damage detection in composite materials because they can be easily integrated into the structure with minimal interference with the bulk properties of the composite. In this current study, a novel intensity-based optical fibre sensor was designed and evaluated under tensionltension and tensionlcompression fatigue loading conditions. This intensity sensor has the ability to monitor rapid strain changes without loss of the reference level. Furthermore, this sensor utilizes relatively simple and inexpensive instrumentatibn. laminate at the manufacturing stage. The embedded optical fibre sensor was not found to affect the fatigue life of the composite both under tensionltension and tensionlcompression loading. The feasibility of using the embedded sensor for fatigue damage detection was demonstrated. Excellent correlation was also obtained between the strain data from a surface mounted optical fibre sensor and a surface-mounted extensometer under fatigue loading conditions.The fibre-optic strain sensor was embedded within a 16-ply 0190 carbonlepoxy 224

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<title>Flight tests of a fiber-optic interferometric strain gauge</title>

Cited by 2 publications

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Fiber Optics Sensors

Fiber Optics Sensors

An intensity-based optical fibre sensor for fatigue damage detection in advanced fibre-reinforced composites

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