scholarly journals Kilometers Long Graphene-Coated Optical Fibers for Fast Thermal Sensing

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yiyong Guo ◽  
Bing Han ◽  
Junting Du ◽  
Shanshan Cao ◽  
Hua Gao ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Optical Fibers ◽  
Rayleigh Scattering ◽  
Graphene Nanosheets ◽  
Pulse Generation ◽  
Thermal Imager ◽  
Long Distance ◽  
Fiber Sensing ◽  
Sensing Applications

The combination of optical fiber with graphene has greatly expanded the application regimes of fiber optics, from dynamic optical control and ultrafast pulse generation to high precision sensing. However, limited by fabrication, previous graphene-fiber samples are typically limited in the micrometer to centimeter scale, which cannot take the inherent advantage of optical fibers—long-distance optical transmission. Here, we demonstrate kilometers long graphene-coated optical fiber (GCF) based on industrial graphene nanosheets and coating technique. The GCF shows unusually high thermal diffusivity of 24.99 mm2 s-1 in the axial direction, measured by a thermal imager directly. This enables rapid thermooptical response both in optical fiber Bragg grating sensors at one point (18-fold faster than conventional fiber) and in long-distance distributed fiber sensing systems based on backward Rayleigh scattering in optical fiber (15-fold faster than conventional fiber). This work realizes the industrial-level graphene-fiber production and provides a novel platform for two-dimensional material-based optical fiber sensing applications.

scholarly journals Engineering nanoparticle features to tune Rayleigh scattering in nanoparticles-doped optical fibers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Victor Fuertes ◽  
Nicolas Grégoire ◽  
Philippe Labranche ◽  
Stéphane Gagnon ◽  
Ruohui Wang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Long Range ◽  
Optical Fibers ◽  
Rayleigh Scattering ◽  
Distributed Sensing ◽  
Optical Losses ◽  
Sensing Applications ◽  
Fiber Fabrication ◽  
Silica Fibers ◽  
Potential Applications

AbstractRayleigh scattering enhanced nanoparticles-doped optical fibers are highly promising for distributed sensing applications, however, the high optical losses induced by that scattering enhancement restrict considerably their sensing distance to few meters. Fabrication of long-range distributed optical fiber sensors based on this technology remains a major challenge in optical fiber community. In this work, it is reported the fabrication of low-loss Ca-based nanoparticles doped silica fibers with tunable Rayleigh scattering for long-range distributed sensing. This is enabled by tailoring nanoparticle features such as particle distribution size, morphology and density in the core of optical fibers through preform and fiber fabrication process. Consequently, fibers with tunable enhanced backscattering in the range 25.9–44.9 dB, with respect to a SMF-28 fiber, are attained along with the lowest two-way optical losses, 0.1–8.7 dB/m, reported so far for Rayleigh scattering enhanced nanoparticles-doped optical fibers. Therefore, the suitability of Ca-based nanoparticles-doped optical fibers for distributed sensing over longer distances, from 5 m to more than 200 m, becomes possible. This study opens a new path for future works in the field of distributed sensing, since these findings may be applied to other nanoparticles-doped optical fibers, allowing the tailoring of nanoparticle properties, which broadens future potential applications of this technology.

scholarly journals Study of Optical Fiber Design Parameters in Fiber Optics Communications

2017 ◽  
Vol 2 (3) ◽  
pp. 302-308 ◽  
Author(s):  
Salim Qadir Mohammed ◽  
Asaad M. Asaad M. Al-Hindawi
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Numerical Aperture ◽  
Design Parameters ◽  
Light Sources ◽  
Long Distance ◽  
Graded Index ◽  
Large Bandwidth ◽  
Telecommunication Infrastructure ◽  
Distance Communication

Fiber optics is an important part in the telecommunication infrastructure. Large bandwidth and low attenuation are features for the fiber optics to provide gigabit transmission. Nowadays, fiber optics are used widely in long distance communication and networking to provide the required information traffic for multimedia applications. In this paper, the optical fiber structure and the operation mechanism for multimode and single modes are analyzed. The design parameters such as core radius, numerical aperture, attenuation, dispersion and information capacity for step index and graded index fibers are studied, calculated and compared for different light sources.

Imaging Spectroscopy Using Fiber Optics

1997 ◽  
Vol 3 (S2) ◽  
pp. 845-846
Author(s):  
S. Michael Angel ◽  
H. Trey Skinner ◽  
Brian J. Marquardt
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Imaging System ◽  
Single Point ◽  
Imaging Spectroscopy ◽  
Small Diameter ◽  
Imaging Spectrometer ◽  
Remote Spectroscopy

Optical fiber probes are routinely used with optical spectrometers to allow measurements to be made on remotely located samples. In most of these systems, however, the optical fibers are used as non-imaging “light pipes” for the transmission of laser light, and luminescence or Raman signals to and from the sample. Thus, while these systems are suitable for remote spectroscopy, they are limited to single-point measurements. In a recent paper, we showed that a small-diameter (i.e., 350 μm) coherent optical fiber bundle can be combined with an AOTF-based imaging spectrometer for fluorescence and Raman spectral micro-imaging with increased flexibility in terms of sample positioning and in-situ capabilities. The previous paper described the operation of the fiber-optic microimaging probe and AOTF imaging system and showed preliminary Raman and fluorescence images for model compounds with 4 μm resolution. We have extended this work to include a discussion of the lateral and vertical spatial resolution of the fiber-optic microprobe in a non-contact proximity-focused configuration.

Smart Structure Based on Continuous Optical Fiber Sensing Technique (Review)

2011 ◽  
Vol 71-78 ◽  
pp. 4138-4141
Author(s):  
Wen Cheng Jin ◽  
Juan Wan ◽  
Qing Rong Ding ◽  
Chang Dong Zhou
Keyword(s):  
Optical Fiber ◽  
High Precision ◽  
Optical Fibers ◽  
Electromagnetic Interference ◽  
Signal Analysis ◽  
Continuous Measurement ◽  
Smart Structure ◽  
Fiber Sensing ◽  
Key Technologies ◽  
Optical Fiber Sensing

Continuous optical fiber sensing technique has the advantages of continuous measurement, corrosion preventing, anti-electromagnetic interference and high precision. This paper integrates continuous optical fiber into smart structure system. It combines the advantages of continuous optical fibers with self-adapting function of smart structures. It may have wide uses in engineering. But it is developing. It has some key technologies to be solved, such as the manufacture and embedment technique of special optical fibers, optimized arrangements of fibers, smart identification of the signal, analysis processing for enormous data and realization of self-adapting function.

Distributed Fiber Optic Strain Sensing with Embedded Small-Diameter Optical Fibers in CFRP Laminate

2007 ◽  
Vol 334-335 ◽  
pp. 1013-1016
Author(s):  
Tadahito Mizutani ◽  
Takafumi Nishi ◽  
Nobuo Takeda
Keyword(s):  
Spatial Resolution ◽  
Optical Fibers ◽  
Composite Structures ◽  
Fiber Optic ◽  
Current Trend ◽  
Small Diameter ◽  
Long Distance ◽  
Distributed Sensors ◽  
Cfrp Laminate ◽  
Sensing Applications

Although demand for composite structures rapidly increase due to the advantages in weight, there are few effective assessment techniques to enable the quality control and guarantee the durability. In particular, an invisible microscopic damage detection technology is highly required because damages such as transverse cracks, debondings, or delaminations can lead to the critical failure of the structures. Among many non-destructive evaluation (NDE) methods for composite structures, fiber optic sensors are especially attractive due to the high sensitivity, the lightweight, and the small size. In the current trend of the structural health monitoring technology, fiber Bragg gratings (FBG) sensors are frequently used as strain or temperature sensors, and Brillouin scattering sensors are also often used for a long distance distributed measurement. The Brillouin distributed sensors can measure strain over a distance of 10km while a spatial resolution was limited to 1m. Some novel sensing method is proposed to improve the spatial resolution. The pulse-prepump Brillouin optical time domain analysis (PPP-BOTDA) is one of the latest distributed sensing applications with a cm-order high spatial resolution. The PPP-BOTDA commercial product has the spatial resolution of 10cm, and can measure the strain with a precision of ±25og. This precision, however, can be achieved by using conventional single-mode optical fibers. In our research, small-diameter optical fibers with a cladding diameter of 40om were embedded in the CFRP laminate to avoid the deterioration of the CFRP mechanical properties. Thus, in order to verify the performance of PPP-BOTDA, the distributed strain measurement was conducted with the small-diameter optical fibers embedded in the CFRP laminate.

Optical-Fiber Sensors: An Overview

MRS Bulletin ◽  
2002 ◽  
Vol 27 (5) ◽  
pp. 365-369 ◽  
Author(s):  
D. J. Webb
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Material Characterization ◽  
Chemical Sensing ◽  
Optical Fiber Sensors ◽  
Bragg Grating ◽  
Fiber Sensors ◽  
Fiber Sensing ◽  
Recent Developments ◽  
Optical Fiber Sensing

AbstractThis article provides an overview of the field of optical-fiber sensing, including a brief introduction to the properties of optical fibers that make them suitable for material characterization and monitoring. Some of the recent developments in the field are described, with an emphasis on Bragg grating sensors, multiplexed systems, and chemical sensing, as well as the new field of microstructured fiber.

Silk: A bio-derived coating for optical fiber sensing applications

2020 ◽  
Vol 311 ◽  
pp. 127864 ◽  
Author(s):  
Asma Khalid ◽  
Lu Peng ◽  
Azim Arman ◽  
Stephen C. Warren-Smith ◽  
Erik P. Schartner ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Sensing ◽  
Sensing Applications ◽  
Optical Fiber Sensing
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