Long-period fiber grating embedded in polymer structure for deformation monitoring

Luiz, Renato; Campos, Deivid; Delgado, Felipe de Souza; Santos, Alexandre Bessa dos

doi:10.1007/s00340-021-07712-8

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…Composite materials are crucial in the fabrication process of displacement and/or pressure sensors. Holographic gratings made by composite polymers represent the most intriguing technological achievement in the field of optical holography over the last few decades [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. An important role in the fabrication of holographic phase gratings is played by multi-acrylate materials that, once polymerized, give rise to a highly interconnected polymer network.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors

Castagna

Riminesi²,

Donato

et al. 2022

Sensors

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In this work, we test the effectiveness of using highly transparent holographic phase reflection and transmission volume gratings based on multifunctional acrylates as linear compression and rotation sensors. The gratings are recorded in a holographic mixture based on multi-reticulated acrylate and haloalkanes. To activate the photo-polymerization process, we used a mixture of 6-oxocamphore and rhodamine 6G. The mixture is a simplified version of the mixture used in previous works and shows some interesting features mainly in connection with the different roles played by the rhodamine 6G dye at different writing wavelengths λ = 532 nm and λ = 460 nm. Regarding reflection gratings, the maximum achieved diffraction efficiency is ≈50% and their use as linear compression sensors produces a shift in the reflection peak of 2 nm. Following the removal of compression, the grating slowly returns to the initial state. Regarding transmission gratings, the maximum achieved diffraction efficiency is ≈45% and they demonstrate very high sensitivity to even small rotations in a free-standing configuration.

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Section: Introductionmentioning

confidence: 99%

On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors

Castagna

Riminesi²,

Donato

et al. 2022

Sensors

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“…Many important advances in Science and Technology are obtained by using composite polymer materials [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. Holographic gratings made by composite polymer materials are one of the most intriguing technological achievements of the last few decades [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. In this context, a pivotal role is played by multi-acrylates or multi-functionalized polymer materials that, after polymerization, can give rise to highly reticulated polymer matrices.…”

Section: Introductionmentioning

confidence: 99%

“…The characteristics of a grating depend on the type of application. In the sensors field, e.g., for pressure/deformation measurements [ 8 , 21 , 22 ], the following properties are usually considered: high transparency, high diffraction efficiency, high wavelength selectivity, high resolution, stable and well defined periodic structure, possibility to be functionalized making them conductive or sensitive to external chemical or biological analytes. High transparency is the signature of a grating that has low scattering losses.…”

Section: Introductionmentioning

confidence: 99%

Top-Performance Transmission Gratings with Haloalkanes-Based Polymeric Composite Materials

Castagna

Riminesi²,

Donato

et al. 2022

Materials

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We report on highly transparent holographic phase transmission volume gratings recorded in the visible region at λ = 532 nm. The maximum measured diffraction efficiency is higher than 80% with a grating pitch of Λ≈ 300 nm and a refractive index modulation Δn ≈ 0.018. To obtain these results, we used a holographic mixture based on multi-reticulated acrylate and haloalkanes (1-bromo-butane and 1-bromo-hexane) and a synergic combination of camphore-quinone, which has a maximum absorbance at c.a. 470 nm, and R6G, here used as co-initiator, to efficiently initiate the photo-polymerization process. High transparent and high efficient holographic structures based on polymers can find applications in many research fields including integrated optics, sensors, high density data storage and security.

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Enhanced aroma prediction in coffee fermentation through optical fiber sensor data fusion

Faraco Filho,

de Castro,

Barino

et al. 2024

Sensors and Actuators A: Physical

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Long-period fiber grating embedded in polymer structure for deformation monitoring

Cited by 4 publications

References 24 publications

On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors

On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors

Top-Performance Transmission Gratings with Haloalkanes-Based Polymeric Composite Materials

Enhanced aroma prediction in coffee fermentation through optical fiber sensor data fusion

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