Resonant Cavity Time-Division-Multiplexed Fiber Bragg Grating Sensor Interrogator

Lloyd, Glynn; Everall, L.A.; Sugden, Kate; Bennion, I.

doi:10.1109/lpt.2004.834849

Cited by 49 publications

(28 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each FBG is approximately 20 mm long, having a peak reflectivity of 5% along with a spectral bandwidth full width half maximum (FWHM) of 70 pm. These FBGs are specifically designed for the interrogation scheme 22 employed for the sensing array based on time division multiplexing and all have approximately the same peak wavelength.…”

Section: Curvature Sensor and Sensing Arraymentioning

confidence: 99%

Respiratory function monitoring using a real-time three-dimensional fiber-optic shaping sensing scheme based upon fiber Bragg gratings

et al. 2012

View full text Add to dashboard Cite

Abstract. An array of in-line curvature sensors on a garment is used to monitor the thoracic and abdominal movements of a human during respiration. The results are used to obtain volumetric changes of the human torso in agreement with a spirometer used simultaneously at the mouth. The array of 40 in-line fiber Bragg gratings is used to produce 20 curvature sensors at different locations, each sensor consisting of two fiber Bragg gratings. The 20 curvature sensors and adjoining fiber are encapsulated into a low-temperature-cured synthetic silicone. The sensors are wavelength interrogated by a commercially available system from Moog Insensys, and the wavelength changes are calibrated to recover curvature. A three-dimensional algorithm is used to generate shape changes during respiration that allow the measurement of absolute volume changes at various sections of the torso. It is shown that the sensing scheme yields a volumetric error of 6%. Comparing the volume data obtained from the spirometer with the volume estimated with the synchronous data from the shape-sensing array yielded a correlation value 0.86 with a Pearson's correlation coefficient p < 0.01.

show abstract

Section: Curvature Sensor and Sensing Arraymentioning

confidence: 99%

Respiratory function monitoring using a real-time three-dimensional fiber-optic shaping sensing scheme based upon fiber Bragg gratings

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Time-division multiplexing (TDM), distinguishing the FBG sensors with an identical wavelength by detecting the different time delay between reflected pulses along the fiber, has substantial potential for increasing the number of the multiplexing sensors [4][5]. Several TDM schemes with a resonant cavity were reported [6][7][8][9]. The schemes have excellent advantages such as low component count, simple drive circuitry, and high extinction signal.…”

Section: Introductionmentioning

confidence: 99%

Time division multiplexing of 106 weak fiber Bragg gratings using a ring cavity configuration

et al. 2016

View full text Add to dashboard Cite

Abstract:A time division multiplexing of 106 weak fibers Bragg gratings (FBGs) based on a ring resonant-cavity is demonstrated. A semiconductor optical amplifier is connected in the cavity to function as an amplifier as well as a switch. The 106 weak FBGs are written along a SMF-28 fiber in serial with peak reflectivity of about 30 dB and equal separations of 5 m. The crosstalk and spectral distortion are investigated through both theoretical analysis and experiments.

show abstract

“…FBG sensors have the common advantages of optical fiber based devices such as low propagation loss, light weight, durability against corrosion, and EMI immunity [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A Multiple Fiber Grating Sensor System using Code Division Multiple Access

Li¹,

Wen²

2013

Proceedings of the 2nd International Conference on Systems Engineering and Modeling

View full text Add to dashboard Cite

show abstract

Resonant Cavity Time-Division-Multiplexed Fiber Bragg Grating Sensor Interrogator

Cited by 49 publications

References 8 publications

Respiratory function monitoring using a real-time three-dimensional fiber-optic shaping sensing scheme based upon fiber Bragg gratings

Respiratory function monitoring using a real-time three-dimensional fiber-optic shaping sensing scheme based upon fiber Bragg gratings

Time division multiplexing of 106 weak fiber Bragg gratings using a ring cavity configuration

A Multiple Fiber Grating Sensor System using Code Division Multiple Access

Contact Info

Product

Resources

About