Polarization-Assisted Fiber Bragg Grating Sensors: Tutorial and Review

Caucheteur, Christophe; Guo, Tuan; Albert, Jacques

doi:10.1109/jlt.2016.2585738

Cited by 88 publications

(41 citation statements)

References 122 publications

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“…From our experience, it is possible to bend the fiber as long as the bent section is a few millimeters away from the sample position in such way that the section of fiber that contains the FBGs remains straight. Fiber bending close to the FBGs will, otherwise, cause background signal fluctuations [45,46] and severely reduced sensitivity. When the bend is implemented correctly, the sensitivity of the technique ( ΔL/L < 10 −6 ) is not compromised (see Figure 6).…”

Section: A Review Of Selected Recent Resultsmentioning

confidence: 99%

“…In practice, however, any transverse strain gradient on the FBG (arising, for example, from the fact that the FBG is typically glued on only one side to a sample [5,45,46]) can lead to a slight difference in the reflected spectrum depending on whether the incident light is polarized along the transverse strain gradient, or orthogonal to it. Consider, then, the case where the incident light is partially linearly polarized (e.g., the output from most SLEDs is partially linearly polarized).…”

Section: Experimental Challenges Artifacts and Strategies Used Tmentioning

confidence: 99%

“…During a high magnetic field pulse, the polarization direction of the light incident on the FBG will rotate (by many radians) due to Faraday rotation in the fiber. This will slightly modulate the center frequency of the reflected spectrum, giving an oscillatory artifact in the detected signal [45,46]. …”

Section: Experimental Challenges Artifacts and Strategies Used Tmentioning

confidence: 99%

“…The main difference between these two methods is that while the force is compressive in the case of a capacitive dilatometer, it is tensile in the case of FBG grating dilatometry (except for materials that expand on cooling, in which case it is also compressive). Further, because the force is applied to the sample side, it can be non-uniform and cause birefringence-related artifacts [5,45,46]. …”

Section: Experimental Challenges Artifacts and Strategies Used Tmentioning

confidence: 99%

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Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

Jaime

Moya

Weickert

et al. 2017

Sensors

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In this work, we review single mode SiO2 fiber Bragg grating techniques for dilatometry studies of small single-crystalline samples in the extreme environments of very high, continuous, and pulsed magnetic fields of up to 150 T and at cryogenic temperatures down to <1 K. Distinct millimeter-long materials are measured as part of the technique development, including metallic, insulating, and radioactive compounds. Experimental strategies are discussed for the observation and analysis of the related thermal expansion and magnetostriction of materials, which can achieve a strain sensitivity (ΔL/L) as low as a few parts in one hundred million (≈10−8). The impact of experimental artifacts, such as those originating in the temperature dependence of the fiber’s index of diffraction, light polarization rotation in magnetic fields, and reduced strain transfer from millimeter-long specimens, is analyzed quantitatively using analytic models available in the literature. We compare the experimental results with model predictions in the small-sample limit, and discuss the uncovered discrepancies.

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Section: A Review Of Selected Recent Resultsmentioning

confidence: 99%

Section: Experimental Challenges Artifacts and Strategies Used Tmentioning

confidence: 99%

Section: Experimental Challenges Artifacts and Strategies Used Tmentioning

confidence: 99%

Section: Experimental Challenges Artifacts and Strategies Used Tmentioning

confidence: 99%

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Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

Jaime

Moya

Weickert

et al. 2017

Sensors

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“…5 Thus, the scope of current research was recently drawn to exploration of multifunctional metasurfaces, [21][22][23][24] including reconfigurable designs. 25 For polarization-controlled optical systems, for example polarization multiplexed fiberoptic communications 26 or polarization-assisted sensing, 27 single-chip multi-functionality is highly advantageous. Here, we demonstrate design of a multifunctional metasurface, which can be straightforwardly used in such systems.…”

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confidence: 99%

Multifunctional Metamirror: Polarization Splitting and Focusing

et al. 2017

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Metasurfaces are paving the way to improve traditional optical components by integrating multiple functionalities into one optically flat metasurface design. We demonstrate the implementation of a multifunctional gap surface plasmon-based metasurface which, in reflection mode, splits orthogonal linear light polarizations and focuses into different focal spots. The fabricated configuration consists of 50 nm thick gold nanobricks with different lateral dimensions, organized in an array of 240 nm×240 nm unit cells on the top of a 50 nm thick silicon dioxide layer, which is deposited on an optically thick reflecting gold substrate. Our device features high efficiency (up to ∼ 65%) and polarization extinction ratio (up to ∼ 30 dB), exhibiting broadband response in the near-infrared band (750-950 nm wavelength) with the focal length dependent on the wavelength of incident light. The proposed optical component can be forthrightly integrated into photonic circuits or fiber optic devices. 1 arXiv:1709.04257v2 [cond-mat.mes-hall]

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In‐Fiber Switchable Polarization Filter Based on Liquid Crystal Filled Hollow‐Filament Bragg Gratings

Rahnama

Dadalyan

Aghdami

et al. 2021

Advanced Optical Materials

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Femtosecond laser filaments are formed by surface aberration to open nano‐hole arrays, passing through the silica cladding and guiding core cross‐section of a standard telecommunication fiber. The hollow filament grating presents a strong capillarity effect to draw nematic liquid crystal (NLC) into homogeneous alignment with the cylindrical walls and presents a high birefringent response in the second‐order Bragg stopband. The NLC provides a strong extinction ratio of up to 20 dB over a ≈5 nm band with only a moderate insertion loss of <1 dB arising between the two polarization states of the shifted stopbands. The Bragg grating follows the thermo‐optic response of the NLC to further offer dynamic tuning and switching of the polarization extinction response without an increase in the insertion loss. The flexible laser writing enables tailoring of the Bragg spectral and polarization responses in the telecommunication C‐band.

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Polarization-Assisted Fiber Bragg Grating Sensors: Tutorial and Review

Cited by 88 publications

References 122 publications

Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

Multifunctional Metamirror: Polarization Splitting and Focusing

In‐Fiber Switchable Polarization Filter Based on Liquid Crystal Filled Hollow‐Filament Bragg Gratings

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