Strain/Temperature Discrimination Using Combined Fiber Bragg Grating and Long Period Grating Sensors

Patrick, Heather J.; Williams, Glen M.; Kersey, Alan D.; Pedrazzani, J. R.; Vengsarkar, Ashish M.

doi:10.1364/ofs.1996.tu42

Cited by 14 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bragg gratings can, however, be used as the fiber sensing element in a host of other applications, and some interesting possibilities exist for the development of multiparameter sensor suites based on FBGs. Gratings are also currently being investigated for use in fiber laser sensors configurations, which can be configured for ultrahigh strain sensitivity applications.The current trends in grating sensor research are toward the use of modified or tailored gratings, such as chirped grating sensors [149,150], multimode gratings [151], other types of gratings, such as polarization rocking filters [152] and long period gratings [153,154], π -phase shifted devices [155], and "structured" gratings [156]. …”

mentioning

confidence: 99%

A Review of Recent Developments in Fiber Optic Sensor Technology

Kersey

1996

Optical Fiber Technology

395

214

View full text Add to dashboard Cite

mentioning

confidence: 99%

A Review of Recent Developments in Fiber Optic Sensor Technology

Kersey

1996

Optical Fiber Technology

395

214

View full text Add to dashboard Cite

“…As an example, for long-period gratings the shifting of the wavelength, which was caused as a result of strain and temperature, varies at about 0,5 and 7 time with relation to shorter period gratings 13 …”

Section: A2mentioning

confidence: 99%

<title>Strain sensors based on fiber Bragg gratings</title>

et al. 2004

View full text Add to dashboard Cite

In this paper, a review is given on the principles of optical fiber Bragg grating (FBG) sensors and their applications as strain sensors. Since the discovery of photosensitivity in optical fibers there has been great interest in the fabrication of Fiber Bragg Gratings within the core of a fiber. The ability to inscribe Bragg gratings in these photosensitive fibers has revolutionized the field of optical fiber based sensor technology. This work reviews the achievements about the FBG as a strain sensor and describes the potential applications of these sensors. The present paper discusses some of the parameters of gratings, which are important for sensor's constructions. These sensors are constructed on the basis of elasto-optic effects where the deformation is coded in wavelength.

show abstract

“…For composite cure monitoring using fiber optic sensors (FOSs), most research has been conducted only to measure the fabrication strain using various types of sensors, such as the extrinsic Fabry-Perot interferometric (EFPI) sensor [9][10][11][12], the FBG sensor [13], and the refractive index sensor [14]. Several techniques, however, have been reported in recent years for the simultaneous measurement of strain and temperature using FOSs [15][16][17][18][19]. With these techniques, simultaneous monitoring of the fabrication strain and the cure temperature is possible with a single FOS.…”

Section: Introductionmentioning

confidence: 99%

Strain and Temperature Monitoring of Asymmetric Composite Laminate using FBG Hybrid Sensors

Guo

2007

Structural Health Monitoring

View full text Add to dashboard Cite

Fiber Bragg grating (FBG) hybrid sensors and thermocouples measure strain and temperature simultaneously during and after cure of asymmetric cross-ply composite laminates. FBG strain sensor is used to measure strain; FBG temperature sensor and thermocouple are used to measure temperature. The characteristic matrix of the sensor is derived analytically and measurements can be done without sensor calibration experiments. A wavelength-swept fiber laser is used as the light source. Two FBG hybrid sensors and two K-type thermocouples are embedded in a carbon/epoxy asymmetric cross-ply composite laminate in different directions and different locations. The real-time measurement of fabrication strains and temperatures is performed at two points within the asymmetric composite laminate during the cure process in a hot press. Through these experiments, FBG hybrid sensors are proven to be an efficient choice for smart monitoring of composite structures.

show abstract

Strain/Temperature Discrimination Using Combined Fiber Bragg Grating and Long Period Grating Sensors

Cited by 14 publications

References 0 publications

A Review of Recent Developments in Fiber Optic Sensor Technology

A Review of Recent Developments in Fiber Optic Sensor Technology

<title>Strain sensors based on fiber Bragg gratings</title>

Strain and Temperature Monitoring of Asymmetric Composite Laminate using FBG Hybrid Sensors

Contact Info

Product

Resources

About