Temperature sensing of the brain enabled by directly inscribed Bragg gratings in CYTOP polymer optical fiber implants

Review Medicine, Research & Experimental

Brain temperature in healthy and diseased conditions: A review on the special implications of MRS for monitoring brain temperature

Burak Yulug et al.

Summary: Brain temperature plays a crucial role in cognitive functionality and the outcomes of brain diseases, particularly in regard to amyloid beta aggregation in Alzheimer's disease.

BIOMEDICINE & PHARMACOTHERAPY (2023)

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Article Optics

Soft monolithic infrared neural interface for simultaneous neurostimulation and electrophysiology

Marcello Meneghetti et al.

Summary: Controlling neuronal activity using implantable neural interfaces is important for understanding and developing strategies against brain diseases. Infrared neurostimulation offers a promising alternative for high-resolution control of neuronal circuitry. However, there is a lack of bi-directional interfaces capable of delivering infrared light and recording electrical signals with minimal inflammation.

LIGHT-SCIENCE & APPLICATIONS (2023)

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Article Chemistry, Analytical

Online Gamma Radiation Monitoring Using Few-Mode Polymer CYTOP Fiber Bragg Gratings

Ivan Chapalo et al.

Summary: We studied the response of fiber Bragg gratings (FBGs) inscribed in a few-mode polymer optical fiber to gamma radiation. The FBGs exhibited a linear Bragg wavelength shift with the dose, with a mean sensitivity of -3.95 pm/kGy at 43 degrees C. The sensitivity increased to -10.6 pm/kGy at 58 degrees C. After irradiation, the FBGs showed partial recovery, which depended on the received dose. In addition, the reflection power of the FBGs decreased with the dose due to radiation induced attenuation in the CYTOP fiber. The linear response and recovery make CYTOP FBGs suitable for gamma radiation dosimetry, but compensation for the temperature dependence is necessary in practical applications.

SENSORS (2023)

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Review Pharmacology & Pharmacy

Using medical microwave radiometry for brain temperature measurements

Oleg Shevelev et al.

Summary: Brain temperature (BT) is a crucial physiological parameter that can be monitored non-invasively using passive microwave radiometry (MWR) and has important implications for brain diagnostics and physical performance.

DRUG DISCOVERY TODAY (2022)

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Article Engineering, Biomedical

Adaptive polymer fiber neural device for drug delivery and enlarged illumination angle for neuromodulation

Kunyang Sui et al.

Summary: This study presents the development of two flexible polymer optical fibers for efficient neuromodulation, featuring integrated microfluidic channels and an ultra-high numerical aperture. The proposed fibers have a larger illumination area and reduced bending stiffness compared to commercial silica fibers. Experimental results demonstrate their potential use as optical waveguides and in fiber photometry applications, paving the way for next-generation functional optical fibers in neuroscience.

JOURNAL OF NEURAL ENGINEERING (2022)

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Article Chemistry, Analytical

Temperature and Humidity Sensitivity of Polymer Optical Fibre Sensors Tuned by Pre-Strain

Andreas Pospori et al.

Summary: This study focuses on the selective tuning of temperature and humidity sensitivities of polymer optical fibre Bragg grating (POFBG) sensors by applying fibre pre-strain. The results show that the temperature sensitivity of POFBG sensors can be selectively tuned from positive to negative values and the humidity sensitivity can also be changed. The importance of thermal annealing treatment for improved repeatability in temperature measurements is also reported. An array of multiplexed POFBGs is fabricated to demonstrate the possibility of having targeted temperature and humidity sensitivities along the same fibre.

SENSORS (2022)

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Proceedings Paper Engineering, Electrical & Electronic

Pre-strain effects on CYTOP fibre Bragg grating temperature sensors

A. Pospori et al.

Summary: Cyclic transparent optical polymer (CYTOP) based fibre Bragg grating (FBG) sensors are of high interest due to their low optical loss. Polymer based FBGs have enhanced sensitivity to stress, pressure, and humidity compared to silica counterparts. However, temperature monitoring with polymer FBGs has inconsistent and non-linear responses. This study investigates the effects of fibre pre-strain on the temperature sensitivity of FBG sensors using an optical fibre with a CYTOP core and a Xylex cladding. The results show that fibre pre-strain greatly enhances the temperature sensitivity of the sensors.

MICRO-STRUCTURED AND SPECIALTY OPTICAL FIBRES VII (2022)

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Review Materials Science, Multidisciplinary

Emerging Applications of Optical Fiber-Based Devices for Brain Research

Roya Nazempour et al.

Summary: Research in neuroscience and neuroengineering has seen a surge of interest in recent decades. Optical fiber based technologies offer a viable and versatile tool for studying the brain, with potential applications in clinical settings. The small size, flexibility, and light weight of optical fibers make them ideal for understanding complex behaviors in living mammals.

ADVANCED FIBER MATERIALS (2022)

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Article Materials Science, Multidisciplinary

All-polymer multimaterial optical fiber fabrication for high temperature applications

Parisah Akrami et al.

Summary: This study successfully fabricated a multimaterial optical fiber based on two different grades of polymers with excellent heat stability, which represents a significant advancement for the polymer optical fiber community.

OPTICAL MATERIALS EXPRESS (2021)

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Article Engineering, Electrical & Electronic

Single Peak Fiber Bragg Grating Sensors in Tapered Multimode Polymer Optical Fibers

G. Woyessa et al.

Summary: This research demonstrates the use of low loss commercially available multi-mode perfluorinated polymer optical fibers for robust and reliable fiber Bragg grating sensing. The single peak FBG reflection spectrum achieved through tapering the fiber and inscribing the FBG allows for high sensitivity strain and humidity measurements. The approach enables multi-point strain sensing at 1550 nm over long distances and combines the advantages of single mode POFs and MM POFs.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2021)

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Article Optics

Thermally unable dispersion modulation in a chalcogenide-based hybrid optical fiber

Marcello Meneghetti et al.

Summary: A novel hybrid optical fiber structure composed of metal electrodes, high performance polymers, and a highly nonlinear glass core is presented as a platform for mid-infrared nonlinear devices. Electrical temperature tuning via joule heating introduces alternating signs of dispersion, resulting in strong modulation effects. Enhanced spectral broadening through supercontinuum generation in the mid-infrared region is investigated numerically.

OPTICS LETTERS (2021)

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Article Multidisciplinary Sciences

Adaptive and multifunctional hydrogel hybrid probes for long-term sensing and modulation of neural activity

Seongjun Park et al.

Summary: This study introduces a hybrid neural probe embedded with a hydrogel structure to achieve adaptive bending stiffness, enabling minimised tissue damage during insertion into the rodent brain.

NATURE COMMUNICATIONS (2021)

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Review Optics

Distributed polymer optical fiber sensors: a review and outlook

Yosuke Mizuno et al.

Summary: This review focuses on recently developed distributed and quasi-distributed POF-based sensing techniques based on Rayleigh scattering, Brillouin scattering, and fiber Bragg gratings. Polymer or plastic optical fibers (POFs) have been extensively used to develop advanced fiber sensors due to their unique features such as high flexibility, large breakage strain, and impact resistance.

PHOTONICS RESEARCH (2021)

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Article Engineering, Electrical & Electronic

Recent trends and advances of fibre Bragg grating sensors in CYTOP polymer optical fibres

Antreas Theodosiou et al.

OPTICAL FIBER TECHNOLOGY (2020)

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Proceedings Paper Optics

Femtosecond laser written long period grating in a multimode CYTOP polymer fibre

Antreas Theodosiou et al.

MICRO-STRUCTURED AND SPECIALTY OPTICAL FIBRES VI (2020)

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Article Neurosciences

The Three-Dimensional Signal Collection Field for Fiber Photometry in Brain Tissue

Marco Pisanello et al.

FRONTIERS IN NEUROSCIENCE (2019)

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Article Engineering, Electrical & Electronic

All-in-Fiber Cladding Interferometric and Bragg Grating Components Made via Plane-by-Plane Femtosecond Laser Inscription

Antreas Theodoslou et al.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2019)

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Review Chemistry, Multidisciplinary

Flexible fiber-based optoelectronics for neural interfaces

Seongjun Park et al.

CHEMICAL SOCIETY REVIEWS (2019)

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Review Chemistry, Multidisciplinary

Multifunctional Fibers as Tools for Neuroscience and Neuroengineering

Andres Canales et al.

ACCOUNTS OF CHEMICAL RESEARCH (2018)

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Article Polymer Science

Polymer Optical Fiber Bragg Gratings in CYTOP Fibers for Angle Measurement with Dynamic Compensation

Arnaldo Leal-Junior et al.

POLYMERS (2018)

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Article Engineering, Biomedical

Optical and thermal simulations for the design of optodes for minimally invasive optogenetics stimulation or photomodulation of deep and large cortical areas in non-human primate brain

A. Dubois et al.

JOURNAL OF NEURAL ENGINEERING (2018)

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Article Materials Science, Multidisciplinary

Zeonex microstructured polymer optical fiber: fabrication friendly fibers for high temperature and humidity insensitive Bragg grating sensing

Getinet Woyessa et al.

OPTICAL MATERIALS EXPRESS (2017)

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Article Engineering, Electrical & Electronic

Low Loss Polycarbonate Polymer Optical Fiber for High Temperature FBG Humidity Sensing

Getinet Woyessa et al.

IEEE PHOTONICS TECHNOLOGY LETTERS (2017)

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Article Engineering, Electrical & Electronic

Plane-by-Plane Femtosecond Laser Inscription Method for Single-Peak Bragg Gratings in Multimode CYTOP Polymer Optical Fiber

Antreas Theodosiou et al.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2017)

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Article Engineering, Biomedical

Simultaneous in vivo recording of local brain temperature and electrophysiological signals with a novel neural probe

Z. Fekete et al.

JOURNAL OF NEURAL ENGINEERING (2017)

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Article Optics

5 Direct writing of plane-by-plane tilted fiber Bragg gratings using a femtosecond laser

Andreas Ioannou et al.

OPTICS LETTERS (2017)

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Review Optics

Roadmap on optical sensors

Mario F. S. Ferreira et al.

JOURNAL OF OPTICS (2017)

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Article Multidisciplinary Sciences

Flexible and stretchable nanowire-coated fibers for optoelectronic probing of spinal cord circuits

Chi Lu et al.

SCIENCE ADVANCES (2017)

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Article Optics

Single mode step-index polymer optical fiber for humidity insensitive high temperature fiber Bragg grating sensors

Getinet Woyessa et al.

OPTICS EXPRESS (2016)

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Article Biochemical Research Methods

Portable optical fiber probe for in vivo brain temperature measurements

Stefan Musolino et al.

BIOMEDICAL OPTICS EXPRESS (2016)

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Article Materials Science, Multidisciplinary

Fabrication and characterization of polycarbonate microstructured polymer optical fibers for high-temperature-resistant fiber Bragg grating strain sensors

Andrea Fasano et al.

OPTICAL MATERIALS EXPRESS (2016)

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Article Engineering, Electrical & Electronic

Femtosecond Laser Inscribed Bragg Gratings in Low Loss CYTOP Polymer Optical Fiber

Amedee Lacraz et al.

IEEE PHOTONICS TECHNOLOGY LETTERS (2015)

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Article Biotechnology & Applied Microbiology

Multifunctional fibers for simultaneous optical, electrical and chemical interrogation of neural circuits in vivo

Andres Canales et al.

NATURE BIOTECHNOLOGY (2015)

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Article Optics

Bragg grating writing in PMMA microstructured polymer optical fibers in less than 7 minutes

Ivan-Lazar Bundalo et al.

OPTICS EXPRESS (2014)

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Review Neurosciences

Infrared neural stimulation: a new stimulation tool for central nervous system applications

Mykyta Chernov et al.

NEUROPHOTONICS (2014)

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Article Optics

High-Tg TOPAS microstructured polymer optical fiber for fiber Bragg grating strain sensing at 110 degrees

Christos Markos et al.

OPTICS EXPRESS (2013)

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Review Instruments & Instrumentation

Medical applications of infrared thermography: A review

B. B. Lahiri et al.

INFRARED PHYSICS & TECHNOLOGY (2012)

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Proceedings Paper Engineering, Electrical & Electronic

Hydrostatic pressure sensing using a polymer optical fibre Bragg gratings

Ian P. Johnson et al.

THIRD ASIA PACIFIC OPTICAL SENSORS CONFERENCE (2012)

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Article Engineering, Electrical & Electronic

Narrow Bandwidth 850-nm Fiber Bragg Gratings in Few-Mode Polymer Optical Fibers

Alessio Stefani et al.

IEEE PHOTONICS TECHNOLOGY LETTERS (2011)

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Article Optics

Label-free biosensing with high sensitivity in dual-core microstructured polymer optical fibers

Christos Markos et al.

OPTICS EXPRESS (2011)

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Article Biochemistry & Molecular Biology

Brain temperature homeostasis: physiological fluctuations and pathological shifts

Eugene A. Kiyatkin

FRONTIERS IN BIOSCIENCE-LANDMARK (2010)

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Article Engineering, Electrical & Electronic

Highly Sensitive Bend Sensor Based on Bragg Grating in Eccentric Core Polymer Fiber

Xianfeng Chen et al.

IEEE PHOTONICS TECHNOLOGY LETTERS (2010)

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Article Physiology

Body and brain temperature coupling: the critical role of cerebral blood flow

Mingming Zhu et al.

JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMIC AND ENVIRONMENTAL PHYSIOLOGY (2009)

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Article Optics

Localized biosensing with Topas microstructured polymer optical fiber

Grigoriy Emiliyanov et al.

OPTICS LETTERS (2007)

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Article Radiology, Nuclear Medicine & Medical Imaging

Measurement of regional brain temperature using proton spectroscopic imaging: validation and application to acute ischemic stroke

Ian Marshall et al.

MAGNETIC RESONANCE IMAGING (2006)

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Article Computer Science, Interdisciplinary Applications

The small world of the cerebral cortex

O Sporns et al.

NEUROINFORMATICS (2004)

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Article Biology

On the role of anesthesia on the body/brain temperature differential in rats

MM Zhu et al.

JOURNAL OF THERMAL BIOLOGY (2004)

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Article Clinical Neurology

A device for cooling localized regions of human cerebral cortex - Technical note

HE Bakken et al.

JOURNAL OF NEUROSURGERY (2003)

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Article Biochemical Research Methods

Brain temperature measurement and regulation in awake and freely moving rodents

S DeBow et al.

METHODS (2003)

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Temperature sensing of the brain enabled by directly inscribed Bragg gratings in CYTOP polymer optical fiber implants

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