Strain and temperature sensors using multimode optical fiber Bragg gratings and correlation signal processing

Lim, Jirapong; Yang, Qingping; Jones, Barry E.; Jackson, P.R.

doi:10.1109/imtc.2001.929449

Cited by 11 publications

(12 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…FBGs, however, have also the drawback of a relevant cross-sensitivity with strain. This aspect has been effectively exploited in some applications [32], but here it represents a serious drawback since strain effects can not be distinguished from temperature effects. To help mitigating this problem, we protected the sensitized portion of the fiber by inserting it into a quartz capillary, which is then collapsed on one end to seal it; we verified that this solution is effective and introduces negligible optical perturbations and acceptable thermal inertia contributions [12].…”

Section: Laser Ablation System Developmentmentioning

confidence: 99%

A Fiber Optic Probe for Tumor Laser Ablation With Integrated Temperature Measurement Capability

Gassino

Liu

Konstantaki

et al. 2017

J. Lightwave Technol.

View full text Add to dashboard Cite

The paper presents the characterization results of a new all-optical applicator for improved tumor laser ablation treatments that features customized irradiation pattern and builtin temperature sensors. The probe exploits a double cladding optical fiber to integrate some Bragg gratings acting as temperature sensing elements in the core, while guiding the high power beam used for the ablation in the inner cladding. The assessment of the probe behavior has been conducted in two steps: first, with an agar gel phantom to characterize the irradiation pattern and to validate the Bragg grating based measurement setup in comparison with a thermographic camera; then, simulating actual treatments using an ex-vivo animal liver.

show abstract

Section: Laser Ablation System Developmentmentioning

confidence: 99%

A Fiber Optic Probe for Tumor Laser Ablation With Integrated Temperature Measurement Capability

Gassino

Liu

Konstantaki

et al. 2017

J. Lightwave Technol.

View full text Add to dashboard Cite

show abstract

“…This forced Lim et al to develop a cross-correlation algorithm to quantify the variation of wavelength shift caused by altering strain or temperature [79]. Caucheteur et al developed a similar demodulation technique which evaluates the position of the reflection spectrum at the measurand (in this case temperature) with respect to the spectrum of an undisturbed sensor in the specific case of a twin Bragg grating [80].…”

Section: Strain Measurements With Embedded Fbgsmentioning

confidence: 99%

Strain Measurements of Composite Laminates with Embedded Fibre Bragg Gratings: Criticism and Opportunities for Research

Luyckx

Voet

Lammens

et al. 2010

Sensors

225

148

View full text Add to dashboard Cite

Embedded optical fibre sensors are considered for structural health monitoring purposes in numerous applications. In fibre reinforced plastics, embedded fibre Bragg gratings are found to be one of the most popular and reliable solutions for strain monitoring. Despite of their growing popularity, users should keep in mind their shortcomings, many of which are associated with the embedding process. This review paper starts with an overview of some of the technical issues to be considered when embedding fibre optics in fibrous composite materials. Next, a monitoring scheme is introduced which shows the different steps necessary to relate the output of an embedded FBG to the strain of the structure in which it is embedded. Each step of the process has already been addressed separately in literature without considering the complete cycle, from embedding of the sensor to the internal strain measurement of the structure. This review paper summarizes the work reported in literature and tries to fit it into the big picture of internal strain measurements with embedded fibre Bragg gratings. The last part of the paper focuses on temperature compensation methods which should not be ignored in terms of in-situ measurement of strains with fibre Bragg gratings. Throughout the paper criticism is given where appropriate, which should be regarded as opportunities for future research.

show abstract

“…Since each LP mode in a FMF interacts differently with the sensing parameters, FMF-based sensors can monitor multiple parameters simultaneously. For example, writing FBGs in FMFs has been used to simultaneously sense temperature and strain [3], and bending and strain [4]. Other trials show that FMFs can construct large scale absorption-based sensing network [5] and reconstruct spatial distributions of gases that diffuse into a silica FMF [6], functionalities that are difficult to implement using the standard single-mode fiber (SMF) and multimode fiber (MMF).…”

Section: Introductionmentioning

confidence: 99%

Quasi-single mode operated few-mode fiber for distributed acoustic sensing

Ashry

Mao

et al. 2019

Advanced Sensor Systems and Applications IX

View full text Add to dashboard Cite

We experimentally report a proof-of-concept demonstration of a few-mode fiber (FMF) based distributed acoustic sensor (DAS) design, aiming at upgrading the capabilities of the typical DAS that employs the standard single mode fiber (SMF). We only excite the fundamental mode at the input port of the FMF, and further, we minimize the impact of intermodal coupling within it such that the FMF operates in a quasi-single mode (QSM) state. The QSM operated FMF keeps the basic operation principle of the DAS valid and, in comparison with the standard SMF, it allows injection of higher pump peak-power before reaching the threshold power of nonlinearity. We validate our design by sensing vibration events produced by a piezoelectric transducer (PZT) cylinder. The FMF based DAS successfully figures out the locations and frequencies of these events. This reported design would enable the realization of a DAS design with longer sensing range and higher spatial resolution, in comparison to the standard SMF based DAS.

show abstract

Strain and temperature sensors using multimode optical fiber Bragg gratings and correlation signal processing

Cited by 11 publications

References 7 publications

A Fiber Optic Probe for Tumor Laser Ablation With Integrated Temperature Measurement Capability

A Fiber Optic Probe for Tumor Laser Ablation With Integrated Temperature Measurement Capability

Strain Measurements of Composite Laminates with Embedded Fibre Bragg Gratings: Criticism and Opportunities for Research

Quasi-single mode operated few-mode fiber for distributed acoustic sensing

Contact Info

Product

Resources

About