Simultaneous Measurement of Strain and Temperature by a Sawtooth Stressor-Assisted Highly Birefringent Fiber Bragg Grating

Guo, Kuikui; He, Jun; Shao, Laipeng; Xu, Gaixia; Wang, Yiping

doi:10.1109/jlt.2019.2959671

Cited by 31 publications

(20 citation statements)

References 25 publications

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“…1. The birefringence will be changed due to a larger internal stress variation on the fiber core when the proposed DFB-FL is subjected to the strain or temperature perturbation [9]. The response of the beat frequency of the proposed DFB-FL to strain and temperature can be expressed as [20]:…”

Section: Principle Of Operationmentioning

confidence: 99%

“…A sawtooth stressor was inscribed in the EDF cladding near the DFB-FL cavity (i.e., π PS-FBG). This fabrication method is similar to that in our previous study [9]. An oil-immersion microscopic objective (MO) of 100× magnification (NA = 1.25) was selected to eliminate the aberration introduced by the cylindrical shape of the EDF.…”

Section: B Femtosecond Laser-inscribed In-fiber Stressorsmentioning

confidence: 99%

“…4(c), the lasing spectrum of the DFB-FL exhibits two distinct peaks due to the increased birefringence. A strong modulated sawtooth stressor inscribed with higher fs laser intensity is in demand to increase the strain and temperature sensitivity of the birefringence [9]. However, this will also generate a high birefringence in the DFB-FL, leading to a large beat frequency shift out of the measurable range of the ESA.…”

Section: B Femtosecond Laser-inscribed In-fiber Stressorsmentioning

confidence: 99%

“…Fiber Bragg grating (FBG) sensors have attracted much attention for their intrinsic advantages such as resistance to electromagnetic interference, compact size, and wavelength multiplexing capability [3,4]. Various FBG-based techniques, for example, using two superimposed FBGs [5], using two distinct FBGs written in different fiber types [6][7][8], or using highly-birefringent FBGs [9], have been reported to simultaneously measure the strain and temperature. Broadband sources or wavelength-tunable lasers are commonly used to interrogate the FBG sensors.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, the beat frequency of the DFB-FL is typically strain insensitive due to the compensation between the straininduced birefringence change and material index change [19]. In previous work, we fabricated a sawtooth stressor in the fiber cladding and increased the strain sensitivities of the fiber birefringence [9]. However, this sawtooth stressorassisted highly birefringent FBG exhibits a relatively large bandwidth of ~0.5 nm, which leads to a low strain resolution for such passive FBG sensors.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Polarization Distributed Feedback Fiber Laser Sensor Based on Femtosecond Laser-Inscribed In-Fiber Stressors for Simultaneous Strain and Temperature Measurements

Guo

et al. 2020

IEEE Access

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We propose and experimentally demonstrate a novel dual-polarization distributed feedback fiber laser (DFB-FL) sensor based on femtosecond laser-inscribed in-fiber stressors. The resonant cavity of the DFB-FL sensor consists of a phase-shifted fiber Bragg grating (PS-FBG) in the fiber core of a section of heavily erbium-doped fiber (EDF), together with two stressors in the fiber cladding around the PS-FBG. The PS-FBG was fabricated by means of a scanning UV laser beam and shielded phase mask technique. The two in-fiber stressors, i.e. a sawtooth stressor and a straight stressor, were directly inscribed at two orthogonal planes in the EDF cladding using a near-infrared femtosecond laser. The two stressors could precisely adjust the fiber birefringence in the laser cavity, and hence the DFB-FL sensor can operate in two polarization modes. Moreover, simultaneous measurement of axial strain and temperature was demonstrated by detecting the polarization beat frequency νB and lasing wavelength λ of the dualpolarization DFB-FL sensor. Experimental results exhibit strain sensitivities of 34.5 kHz/µε, 1.25 pm/µε and temperature sensitivities of 684.6 kHz/°C, 11.5 pm/°C, respectively. As such, the proposed dualpolarization DFB-FL sensor could be used for simultaneous strain and temperature measurements, and hence is promising for application in many areas, such as smart structures and intelligent robotics.

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Section: Principle Of Operationmentioning

confidence: 99%

Section: B Femtosecond Laser-inscribed In-fiber Stressorsmentioning

confidence: 99%

Section: B Femtosecond Laser-inscribed In-fiber Stressorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dual-Polarization Distributed Feedback Fiber Laser Sensor Based on Femtosecond Laser-Inscribed In-Fiber Stressors for Simultaneous Strain and Temperature Measurements

Guo

et al. 2020

IEEE Access

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Customized Optical Fiber Birefringent Sensors to Multipoint and Simultaneous Temperature and Radial Strain Tracking of Lithium‐Ion Batteries

Matuck

Pinto

Marques

et al. 2023

Advanced Sensor Research

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Batteries are seen as a vital piece for actual carbon-neutral world needs. However, as they basically operate through extremely exothermic electrochemical events, special attention must be paid to their thermal and volumetric constraints, where continuous and accurate monitoring is of great importance. Considering it, customized optical sensors, based on fiber Bragg gratings recorded in birefringent PANDA fibers (FBG-PANDA), are developed and instrumented in a coiled configuration into a cylindrical Li-ion battery (LiB) to simultaneously track temperature and radial strain during galvanostatic cycles, in three different battery locations, for the first time. The maximum temperature and radial strain variations are achieved in the middle and at the end of the discharge steps. This thermal behavior is correlated with the internal heat generation and transfer of thermal energy processes, with a tendency to accumulate in the LiB central zone.Good feasibility and reproducibility are observed in the optical sensor's performance and demonstrated that by operating as a multiparameter decouple system, they can decrease the complexity and intrusiveness in batteries, by using only one optical fiber line. The reported results are in accordance with the literature, indicating that such sensors could be consistently used for future applications regarding battery safety parameters sensing.

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Fiber sensor based on Fabry‐Perot/Mach‐Zehnder hybrid interferometer for transverse load and temperature

Han

Liu

et al. 2020

Micro & Optical Tech Letters

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A fiber optic sensor based on array of silica microspheres and air cavity have been fabricated in fusion splicer and experimentally demonstrated in this article. The four‐microspheres structure stimulates higher‐order cladding modes of the gaussian beam, and the air cavity acts as a coupler for Mach‐Zehnder interferometer (MZI) on the one hand and a Fabry‐Perot interferometer (FPI) on the other. The sensing head is subjected to temperature and transverse load where the sensitivity of 160 pm/°C and 124.6 pm/N are obtained, respectively. Compared with similar sensors, the sensor has the advantages of high sensitivity, low‐cost and practical, and it will have a great market prospect.

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Simultaneous Measurement of Strain and Temperature by a Sawtooth Stressor-Assisted Highly Birefringent Fiber Bragg Grating

Cited by 31 publications

References 25 publications

Dual-Polarization Distributed Feedback Fiber Laser Sensor Based on Femtosecond Laser-Inscribed In-Fiber Stressors for Simultaneous Strain and Temperature Measurements

Dual-Polarization Distributed Feedback Fiber Laser Sensor Based on Femtosecond Laser-Inscribed In-Fiber Stressors for Simultaneous Strain and Temperature Measurements

Customized Optical Fiber Birefringent Sensors to Multipoint and Simultaneous Temperature and Radial Strain Tracking of Lithium‐Ion Batteries

Fiber sensor based on Fabry‐Perot/Mach‐Zehnder hybrid interferometer for transverse load and temperature

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