Self-compensated high-speed FBG interrogation using closed-loop tracking system

Kempen, Lothar U.; Mendoza, Edgar A.; Saxena, Indu

doi:10.1117/12.753550

Cited by 4 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…FBGs are also used to monitor high frequency vibrations for impact damage assessment [3,4], sonar hydrophones and acoustic emission spectroscopy [5]. Peak-tracking systems are reported that have rates approaching the megahertz range [6]. However, merely tracking the changes in the peak response of a grating reflection spectrum leaves out many of the details of the material response to a particular stress and can result in inaccurate measurements.…”

Section: Introductionmentioning

confidence: 99%

Full-spectrum interrogation of fiber Bragg gratings at 100 kHz for detection of impact loading

Vella¹,

Chadderdon²,

Selfridge³

et al. 2010

Meas. Sci. Technol.

View full text Add to dashboard Cite

This paper explains key innovations that allow monitoring of detailed spectral features of an FBG in response to impact loading. The new system demonstrates capture of FBG spectral data at rates of 100 kHz. Rapid capture of the entire reflection spectrum at such high reading rates shows important features that are missed when using systems that merely track changes in the peak location of the spectrum. The update rate of 100 kHz allows resolution of features that occur on transient time scales as short as 10 µs. This paper gives a detailed description of the unique features of the apparatus and processes used to capture the data at such a rapid rate. Furthermore, we demonstrate this interrogation scheme on a composite laminate system during impact.

show abstract

Section: Introductionmentioning

confidence: 99%

Full-spectrum interrogation of fiber Bragg gratings at 100 kHz for detection of impact loading

Vella¹,

Chadderdon²,

Selfridge³

et al. 2010

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…In a previous publication [9] and a related patent, [10] we described a technique employing broadband illumination and a matched filter [11] in front of the detector to attain a large intensity change with FBG wavelength shift. While this method provides a large ∂I/∂λ value, this solution typically only allows operation within a narrow wavelength band.…”

Section: Technologymentioning

confidence: 99%

Interrogation strategies for distributed and multipoint fiber optic sensors

Kempen

Saxena

2010

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

Fiber optic sensors have matured to allow the detection of chemical and physical parameters at multiple points, or in a distributed fashion, along the length of a single optical fiber strand. The electro-optic readout unit connected to the fiber needs to be tailored to the specific sensor application to balance the requirements for spatial and frequency resolution, interrogation intervals, readout time, noise suppression, system size and cost, and other parameters. This paper will discuss different fiber optic sensor configurations and suitable readout strategies to meet the requirements of the sensing application.

show abstract

“…Typically high speed dynamic interrogation of FBG sensors utilizes peak-tracking methods that have reading rates approaching the megahertz range [6]. However, merely tracking the changes in the peak response of an FBG sensor reflection spectrum leaves out many of the details of the material response to stresses of the system under test and can result in inaccurate measurements.…”

Section: Introductionmentioning

confidence: 99%

High-speed full-spectrum interrogation of fiber Bragg gratings for composite impact sensing

et al. 2010

View full text Add to dashboard Cite

This paper presents a means for the high repetition rate interrogation of fiber Bragg gratings (FBG's). The new system highlights a method that allows a tradeoff between the full spectrum capture rate and the wavelength range and/or the spectral resolution of the technique. Rapid capture of the entire reflection spectrum at high interrogation rates shows important features that are missed when using methods that merely track changes in the peak location of the spectrum. The essential feature of the new system is that it incorporates a MEMs tunable filter driven by a variable frequency openloop sinusoidal source. The paper demonstrates the new system on a laminated composite system under impact loading.

show abstract

Self-compensated high-speed FBG interrogation using closed-loop tracking system

Cited by 4 publications

References 8 publications

Full-spectrum interrogation of fiber Bragg gratings at 100 kHz for detection of impact loading

Full-spectrum interrogation of fiber Bragg gratings at 100 kHz for detection of impact loading

Interrogation strategies for distributed and multipoint fiber optic sensors

High-speed full-spectrum interrogation of fiber Bragg gratings for composite impact sensing

Contact Info

Product

Resources

About