Advertisement

Topics

PubMed Journals Articles About "Global Chinese Fiber Optic Current Sensor AFOCS Industry" RSS

20:08 EST 13th December 2018 | BioPortfolio

Global Chinese Fiber Optic Current Sensor AFOCS Industry PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Global Chinese Fiber Optic Current Sensor AFOCS Industry articles that have been published worldwide.

More Information about "Global Chinese Fiber Optic Current Sensor AFOCS Industry" on BioPortfolio

We have published hundreds of Global Chinese Fiber Optic Current Sensor AFOCS Industry news stories on BioPortfolio along with dozens of Global Chinese Fiber Optic Current Sensor AFOCS Industry Clinical Trials and PubMed Articles about Global Chinese Fiber Optic Current Sensor AFOCS Industry for you to read. In addition to the medical data, news and clinical trials, BioPortfolio also has a large collection of Global Chinese Fiber Optic Current Sensor AFOCS Industry Companies in our database. You can also find out about relevant Global Chinese Fiber Optic Current Sensor AFOCS Industry Drugs and Medications on this site too.

Showing "Global Chinese Fiber Optic Current Sensor AFOCS Industry" PubMed Articles 1–25 of 23,000+

Stretchable fiber-Bragg-grating-based sensor.

A fiber-Bragg-grating-(FBG)-based sensor is a very popular fiber optic sensor due to its simplicity, mature fabrication technology, and sensitivity to a number of physical stimuli. However, due to the stiff nature of optical fiber, it is impossible to heavily stretch a FBG sensor. A stretchable sensor is highly desired in soft robotics, human motion detection, and biomedical applications, which could involve motions like tension, bending, and twisting. In this Letter, we demonstrate a stretchable FBG-based ...


High-sensitivity fiber optic hydrogen sensor in air by optimizing a self-referenced demodulating method.

Self-referenced demodulating methods of fiber optic hydrogen sensors based on WO-PdPt-Pt composite film are studied in this paper. By employing the proper baseline intensity as sensing parameters, fluctuations of the sensing signal of the hydrogen sensor can be obviously depressed, and sensitivity can be greatly improved. Experimental results show that the resolution of the hydrogen sensor can reach 3 parts per million (ppm) when the hydrogen concentration is lower than 1000 ppm. Additionally, the hydrogen...

Fiber-optic Fabry-Perot pressure sensor based on low-temperature co-fired ceramic technology for high-temperature applications.

In this study, a novel batch-producible fiber-optic Fabry-Perot (FP) pressure sensor based on a low-temperature co-fired ceramic technology is proposed and experimentally demonstrated for high-temperature applications. The sensor is fabricated by inserting a well-cut single-mode fiber (SMF) into a zirconia fiber ferrule, followed by insertion of the overall structure into an alumina sensor head. The FP cavity in the sensor is formed by placing the end face of the SMF in parallel to the diaphragm. The extern...


Ultrahigh resolution optic fiber strain sensor with a frequency-locked random distributed feedback fiber laser.

This Letter presents an ultrahigh resolution optic fiber strain sensor. A random distributed feedback fiber laser (RDFL) is locked by the proposed frequency-shift Pound-Drever-Hall technique, which tracks the resonant frequency change of a π-phase-shifted fiber Bragg grating. The random distributed feedback for the RDFL gives a Lorentzian envelope over the original laser frequency noise, which can suppress the thermally induced frequency noise. The frequency noise of the laser is reduced from about 100 to ...

Acousto-optic Catheter Tracking Sensor for Interventional MRI Procedures.

The objective of this paper is to introduce an acousto-optic optical fiber sensor for tracking catheter position during interventional magnetic resonance imaging (MRI) to overcome RF induced heating of active markers.

Fabrication of three-dimensional zinc oxide nanoflowers for high-sensitivity fiber-optic ammonia gas sensors.

ZnO is identified as one of the promising coating materials in optical fiber for ammonia gas sensors. In this work, three-dimensional ZnO nanoflowers are fabricated via a facile hydrothermal method and used as sensitive coating materials for optical fiber ammonia gas sensors. Results show that the sensor with ZnO nanoflowers exhibits a high sensitivity of 5.75  pm/(μg·L) for ammonia concentration ranging from 0 to 5460  μg·L, which is more than 2.6 times higher than that of the sensor with a coa...

Optical Sensor for Real-Time pH Monitoring in Human Tissue.

This article reports on a fiber-based ratiometric optical pH sensor for use in real-time and continuous in vivo pH monitoring in human tissue. Stable hybrid sol-gel-based pH sensing material is deposited on a highly flexible plastic optical fiber tip and integrated with excitation and detection electronics. The sensor is extensively tested in a laboratory environment before it is applied in vivo in a human model. The pH sensor performance in the laboratory environment outperforms the state-of-the-art report...

A fiber-optic bolometer based on a high-finesse silicon Fabry-Pérot interferometer.

We report a fiber-optic bolometer based on a high-finesse silicon Fabry-Perot interferometer (FPI). The silicon FPI absorbs and converts the incident radiation into temperature variations, which are interrogated by the shift of the reflection spectrum of the FPI. The FPI is a silicon pillar with one side coated with a high-reflectivity dielectric mirror and the other side coated with a gold mirror. A multimode fiber collimator is applied between the FPI and lead-in single-mode fiber to reduce the round-trip...

Active synchronization and modulation of fiber lasers with a graphene electro-optic modulator.

We report the synchronization of two actively -switched fiber lasers operating at 1.5 μm and 2 μm with a shared broadband graphene electro-optic modulator. Two graphene monolayer sheets separated with a high- dielectric layer are configured to enable broadband light modulation. The graphene electro-optic modulator is shared by two optical fiber laser cavities (i.e., an erbium-doped fiber laser cavity and a thulium/holmium-codoped fiber laser cavity) to actively -switch the two lasers, resulting in stable ...

Temperature and liquid refractive index sensor using P-D fiber structure-based Sagnac loop.

A cost-efficient P-D fiber structure-based Sagnac loop sensor is proposed and experimentally demonstrated for measuring temperature and liquid refractive index (RI). The P-D structure is fabricated by fusion splicing a section of polarization-maintaining fiber (PMF) to a piece of multimode D-shaped optical fiber (MMDF). Then the P-D structure is built into a Sagnac loop using a 3dB coupler. The temperature and RI characteristics of the sensor are investigated experimentally. The results show that two resona...

Pediatric optic neuritis.

Pediatric optic neuritis may be challenging to diagnose and treat. Significant clinical investigation of optic neuritis occurring in adults guides current clinical practices. Differences in presentation and prognosis exist for pediatric patients with optic neuritis when compared with adults including the risk of developing multiple sclerosis. The aim of this review is to provide an update on latest advances in the diagnosis, treatment and current research concerning pediatric optic neuritis.

High-resolution slow-light fiber Bragg grating temperature sensor with phase-sensitive detection.

This Letter reports a slow-light fiber Bragg grating (FBG) temperature sensor with a record temperature resolution of ∼0.3  m°C/√Hz, a drift of only ∼1  m°C over the typical duration of a measurement (∼30  s), and negligible self-heating. This sensor is particularly useful for applications requiring the detection of very small temperature changes, such as radiation-balanced lasers and the measurement of small absorptive losses using calorimetry. The sensor performance is demonstrated b...

Compact dual-fiber surface-enhanced Raman scattering sensor with monolayer gold nanoparticles self-assembled on optical fiber.

Employing a self-assembly method and dual-fiber structure, a compact, low-cost, highly sensitive, fast surface-enhanced Raman scattering (SERS) optical fiber sensor was realized. Through detecting a SERS signal of 10 ppm rhodamine B analyte, sensor parameters such as coupling angle, fiber types, and corresponding glass substrate structure were optimized. The ratio of the SERS signal intensity to excitation light residual peak intensity was used as a significant parameter during the optimization process. Se...

Fully automated fiber-based optical spectroscopy system for use in a clinical setting.

While there are a plethora of in vivo fiber-optic spectroscopic techniques that have demonstrated the ability to detect a number of diseases in research trials with highly trained personnel familiar with the operation of experimental optical technologies, very few techniques show the same level of success in large multicenter trials. To meet the stringent requirements for a viable optical spectroscopy system to be used in a clinical setting, we developed components including an automated calibration tool, o...

A Novel Strain Sensor with Large Measurement Range Based on All Fiber Mach-Zehnder Interferometer.

We have proposed a high sensitive photonic crystal fiber (PCF) strain sensor based on the Mach-Zehnder interferometer (MZI). The sensing head is formed by all-fiber in-line single mode-multimode-photonic-crystal-single mode fiber (SMPS) structure, using only the splicing method. Such a strain sensor exhibited a high sensitivity of -2.21 pm/με within a large measurement range of up to 5000 με and a large fringe visibility of up to 24 dB. Moreover, it was found that the strain sensitivity was weekly depen...

Fiber optic surface plasmon resonance sensor for detection of E. coli O157:H7 based on antimicrobial peptides and AgNPs-rGO.

A fiber optic surface plasmon resonance (FOSPR) sensor was developed for detection of Escherichia coli O157:H7 (E. coli O157:H7) in water and juice, based on antimicrobial peptides (AMP), Magainin I, as recognition elements and silver nanoparticles-reduced graphene oxide (AgNPs-rGO) nanocomposites assisted signal amplification. The uniform AgNPs-rGO was fixed on the surface of optical fiber and covered with gold film. Not only was the SPR response greatly enhanced, but also the AgNPs was prevented from bein...

Simultaneous implementation of enhanced resolution and large dynamic range for fiber temperature sensing based on different optical transmission mechanisms.

In this paper, a high resolution and large dynamic range fiber optic temperature sensor without measurement crosstalk has been proposed. Two combinational mechanisms of anti-resonant reflecting optical waveguide and inline Mach-Zehnder interference structure are integrated in single hole twin eccentric cores fiber. The dual-effect composite spectrum is consist of several dominant resonant wavelengths and comb pattern, which are corresponding to the two above-mentioned mechanisms. Gauss fit and fast Fourier ...

Combining Videolaryngoscopy With Fiber-Optic Orotracheal Intubation for Inclusion in the Nonemergency Pathway of the Difficult Airway Algorithm.

As technology progresses, our clinical treatment options rise steadily. We are comfortable now with the handling of ready-to-use high-quality videolaryngoscopes and fiber optics, and there is increasing knowledge and practice that the combination of these 2 techniques has a high "rescue rate" in situations when fiber-optic intubation or videolaryngoscopic intubation fails. Therefore, we would recommend to specifically include this technique in the "difficult airway algorithm-nonemergency pathway," so it com...

Diaphragm-free gas-pressure sensor probe based on hollow-core photonic bandgap fiber.

A diaphragm-free probe-type gas-pressure sensor is proposed and experimentally demonstrated based on a hollow-core photonic bandgap fiber (HC-PBF) with a quartz capillary. The section of the HC-PBF acts as a Fabry-Perot cavity, and the quartz capillary acts as a microfluidic channel for a gas inlet. An inner diameter of the quartz capillary (∼2  μm) smaller than the HC-PBF (∼10.9  μm) ensures a mirror reflection and a microfluidic channel simultaneously. The sensor probe has a minimal size (...

Directivity and Frequency-Dependent Effective Sensitive Element Size of a Reflectance-Based Fiber Optic Hydrophone: Predictions from Theoretical Models Compared with Measurements.

The goal of this work was to measure directivity of a reflectance-based fiber-optic hydrophone at multiple frequencies and to compare it to four theoretical models: Rigid Baffle (RB), Rigid Piston (RP), Unbaffled (UB), and Soft Baffle (SB). The fiber had a nominal 105 μm diameter core and a 125 μm overall diameter (core + cladding). Directivity measurements were performed at 2.25, 3.5, 5, 7.5, 10, and 15 MHz from ±90° in two orthogonal planes. Effective hydrophone sensitive element radius was estimated ...

Dual-core all-fiber integrated immunosensor for detection of protein antigens.

An optical fiber interferometric microprobe for detection of specific proteins is presented in this paper. The microprobe is an all-fiber device, which is based on Michelson interferometer configuration, which allows for detection of protein antigens in an analyzed solution thanks to antibodies immobilized on the sensor surface. The interferometer is made of dual core fiber and has a precisely formed arm length difference, achieved by splicing a fragment of polarization maintaining fiber to one of the cores...

Rapid detection of Escherichia coli using fiber optic surface plasmon resonance immunosensor based on biofunctionalized Molybdenum disulfide (MoS) nanosheets.

The molybdenum disulfide (MoS) nanosheets functionalized fiber optic surface plasmon resonance (SPR) immunosensor has been reported for the sensitive detection of Escherichia coli (E. coli). The MoS nanosheets were prepared by chemical exfoliation method. The synthesised nanostructures were characterized for their structural, morphological and optical properties. The E. coli monoclonal antibodies were successfully immobilized on the MoS functionalized sensing platform via hydrophobic interactions. An altern...

Macular choroidal thickness and peripapillary retinal nerve fiber layer thickness in normal adults and patients with optic atrophy due to acute idiopathic demyelinating optic neuritis.

To evaluate the association between macular choroidal thickness and peripapillary RNFL thickness in patients with optic atrophy due to acute idiopathic demyelinating optic neuritis and in normal controls using spectral domain optical coherence tomography (SD-OCT).

Mitochondrial Impairment in Antibiotic-Induced Toxic Optic Neuropathies.

There is growing evidence for the role of mitochondrial dysfunction in the toxic optic neuropathies. Due to the structural similarities between antibiotic targets and mitochondrial machinery, several antibiotics known to cause optic neuropathy have deleterious effects on mitochondrial function. We review the literature on the prevalence, clinical manifestations, and management of antibiotic-induced toxic optic neuropathies. The effect of these antibiotics on mitochondrial function in regards to the optic ne...

Ultra-stretchable Multilayered Fiber with a Hollow-Monolith Structure for High Performance Strain Sensor.

As a crucial component of data terminal acquisition devices, flexible strain sensor has shown promising applications in numerous fields, such as healthcare, bodynet, intelligent traffic system and robotic system. For stretchable strain sensor, it remains a giant challenge to realize a fine balance of wide detection range and high sensitivity. Here, an electrically conductive carbon nanotubes (CNTs)/ thermoplastic polyurethane (TPU) fiber with a multilayered, hollow, and monolith structure, accompanying with...


Advertisement
Quick Search
Advertisement
Advertisement