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High pressure sensor based on intensity-variation using polymer optical fiber.
Sci Rep
August 2024
Faculty of Design, Aror University of Art Architecture Design and Heritage Sindh, Sukkur, Sindh, 65200, Pakistan.
Silica fiber under high pressure increases the risk of fiber breakage or permanent deformation, which may cause sensor failure due to mechanical strength limitations. High pressure can also induce birefringence in optical fiber. In this study, we present a simple design and low-cost high pressure sensor using polymer optical fiber (POF) based on the intensity-variation technique.
View Article and Find Full Text PDFBirefringence-induced phase delay enables Brillouin mechanical imaging in turbid media.
Nat Commun
June 2024
CNR-Istituto di Fotonica e Nanotecnologie, CNR-IFN, Piazza Leonardo da Vinci 32, 20133, Milano, Italy.
Article Synopsis
- Acoustic vibrations provide key viscoelastic information that can be analyzed using inelastic Brillouin scattered light, but traditional methods struggle with turbid samples due to excess background light.
- The introduction of a common-path Birefringence-Induced Phase Delay (BIPD) filter allows for better separation of Brillouin and Rayleigh signals, significantly reducing background noise by an extinction ratio of 65 dB.
- This technique was successfully applied to image bone tissues in a mouse model of osteopetrosis, revealing changes in biomechanical properties and offering new insights into mechanobiology for challenging biological samples.
Optical elements embedded in an optical fiber can be used to shape and modulate the light transmitted within. We consistently observe, via Mueller polarimetry, that the optical properties of a femtosecond (fs) laser-created spherical cavity within a perfluorinated fiber exhibit predictable patterns. Specifically, linear birefringence is always induced at the periphery of the cavity, with its value showing a bell-shape distribution.
View Article and Find Full Text PDFNano-achiral complex composites for extreme polarization optics.
Nature
June 2024
Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA.
Composites from 2D nanomaterials show uniquely high electrical, thermal and mechanical properties. Pairing their robustness with polarization rotation is needed for hyperspectral optics in extreme conditions. However, the rigid nanoplatelets have randomized achiral shapes, which scramble the circular polarization of photons with comparable wavelengths.
View Article and Find Full Text PDFAs a complex anisotropic medium, variation in birefringence within biological tissues is closely associated with numerous physiological behaviors and phenomena. In this Letter, we propose a polarization feature fusion method and corresponding polarimetric parameters, which exhibit excellent performance of capturing the birefringence dynamic variation process in complex anisotropic media. By employing the feature fusion method, we combine and transform polarization basis parameters (PBPs) to derive fused polarization feature parameters (FPPs) with explicit expressions.
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