Application of Fiber Optics in Bio-Sensing

The unique properties of optical fibers such as small size, immunity to electromagnetic radiation, high sensitivity with simpler sensing systems have found their applications from structural monitoring to biomedical sensing. The inclusion of optical transducers, integrated electronics and new immobilization methods, the optical fibers have been used in industrial process, environmental monitoring, food processing and clinical applications. Further, the optical fiber sensing research has also been extended to the area of detection of micro-organisms such as bacteria, viruses, fungi and protozoa. The validation of optical fibers in bio-sensing applications can be observed from the growing number of publications. This chapter provides a brief picture of optical fiber biosensors, their geometries including the necessary procedure for their development. This chapter could be a milestone for the young researchers to establish their laboratory.

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Imaging Spectroscopy Using Fiber Optics

Microscopy and Microanalysis ◽

10.1017/s1431927600011119 ◽

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.

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Carbon Allotrope-Based Optical Fibers for Environmental and Biological Sensing: A Review

Sensors ◽

10.3390/s20072046 ◽

2020 ◽

Vol 20 (7) ◽

pp. 2046 ◽

Cited By ~ 1

Author(s):

Stephanie Hui Kit Yap ◽

Kok Ken Chan ◽

Swee Chuan Tjin ◽

Ken-Tye Yong

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

High Sensitivity ◽

Optical Fiber Sensors ◽

Functional Coating ◽

Fiber Sensors ◽

Carbon Allotrope ◽

Carbon Allotropes ◽

Sensing Technology ◽

Wide Range

Recently, carbon allotropes have received tremendous research interest and paved a new avenue for optical fiber sensing technology. Carbon allotropes exhibit unique sensing properties such as large surface to volume ratios, biocompatibility, and they can serve as molecule enrichers. Meanwhile, optical fibers possess a high degree of surface modification versatility that enables the incorporation of carbon allotropes as the functional coating for a wide range of detection tasks. Moreover, the combination of carbon allotropes and optical fibers also yields high sensitivity and specificity to monitor target molecules in the vicinity of the nanocoating surface. In this review, the development of carbon allotropes-based optical fiber sensors is studied. The first section provides an overview of four different types of carbon allotropes, including carbon nanotubes, carbon dots, graphene, and nanodiamonds. The second section discusses the synthesis approaches used to prepare these carbon allotropes, followed by some deposition techniques to functionalize the surface of the optical fiber, and the associated sensing mechanisms. Numerous applications that have benefitted from carbon allotrope-based optical fiber sensors such as temperature, strain, volatile organic compounds and biosensing applications are reviewed and summarized. Finally, a concluding section highlighting the technological deficiencies, challenges, and suggestions to overcome them is presented.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.4138 ◽

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.

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Optical-Fiber Sensors: An Overview

MRS Bulletin ◽

10.1557/mrs2002.121 ◽

2002 ◽

Vol 27 (5) ◽

pp. 365-369 ◽

Cited By ~ 5

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.

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Sensitivity Enhancement of Heterocore Macrobend Fiber Optics by Adding a ZnO Film

International Journal of Optics ◽

10.1155/2021/5511342 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Noor Azie Azura Mohd Arif ◽

Dilla Duryha Berhanuddin ◽

Abang Annuar Ehsan

Keyword(s):

Refractive Index ◽

Fiber Optics ◽

Optical Fibers ◽

High Sensitivity ◽

Comsol Multiphysics ◽

Zno Films ◽

Curvature Radius ◽

Optimum Thickness ◽

Zno Film ◽

The Relationship

Optical fibers with high sensitivity are in demand due to their great potential in sensor application. Semiconductors, such as ZnO, are good materials. Using them as a second cladding offers opportunities in realizing next-generation multimaterial fiber optics. COMSOL Multiphysics is used to simulate heterocore macrobend fiber optics with the same curvature radius but different values of refractive index and thickness of ZnO films. The optimum thickness of ZnO films is identified by determining the loss of optical fibers. Macrobend heterocore fiber optics by adding ZnO thin film has been established by simulating and interpreting the relationship in terms of transmission and refractive index in the evanescent field. These results will provide a reliable fundamental to guide the performance in practice.

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ZnO Composite Graphene Coating Micro-Fiber Interferometer for Ultraviolet Detection

Sensors ◽

10.3390/s20051478 ◽

2020 ◽

Vol 20 (5) ◽

pp. 1478 ◽

Cited By ~ 1

Author(s):

Tao Shen ◽

Xiaoshuang Dai ◽

Daqing Zhang ◽

Wenkang Wang ◽

Yue Feng

Keyword(s):

Optical Fiber ◽

Optical Fiber Sensor ◽

High Sensitivity ◽

Single Mode ◽

Ultraviolet Detection ◽

Sensing Technology ◽

Detection Technology ◽

Zno Nanosheets ◽

Optical Fiber Sensing ◽

Higher Sensitivity

A simple and reliable ultraviolet sensing method with high sensitivity is proposed. ZnO and ZnO composite graphene are successfully prepared by the hydrothermal method. The optical fiber sensor is fabricated by coating the single-mode-taper multimode-single-mode (STMS) with different shapes of ZnO. The effects of the sensitivity of ultraviolet sensors are further investigated. The results show that the sensor with ZnO nanosheets exhibits a higher sensitivity of 357.85 pm/nW·cm−2 for ultraviolet sensing ranging from 0 to 4 nW/cm2. The ultraviolet characteristic of STMS coated flake ZnO composite graphene has been demonstrated with a sensitivity of 427.76 pm/nW·cm−2. The combination of sensitive materials and optical fiber sensing technology provides a novel and convenient platform for ultraviolet detection technology.

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Long-Range Distributed Solar Irradiance Sensing Using Optical Fibers

Sensors ◽

10.3390/s20030908 ◽

2020 ◽

Vol 20 (3) ◽

pp. 908 ◽

Cited By ~ 1

Author(s):

Regina Magalhães ◽

Luis Costa ◽

Sonia Martin-Lopez ◽

Miguel Gonzalez-Herraez ◽

Alejandro F. Braña ◽

...

Keyword(s):

Solar Energy ◽

Optical Fiber ◽

Real Time ◽

Long Range ◽

Optical Fibers ◽

Solar Irradiance ◽

High Sensitivity ◽

Ground Level ◽

Solar Simulator ◽

Distributed Sensor

Until recently, the amount of solar irradiance reaching the Earth surface was considered to be a steady value over the years. However, there is increasing observational evidence showing that this quantity undergoes substantial variations over time, which need to be addressed in different scenarios ranging from climate change to solar energy applications. With the growing interest in developing solar energy technology with enhanced efficiency and optimized management, the monitoring of solar irradiance at the ground level is now considered to be a fundamental input in the pursuit of that goal. Here, we propose the first fiber-based distributed sensor able of monitoring ground solar irradiance in real time, with meter scale spatial resolutions over distances of several tens of kilometers (up to 100 km). The technique is based on an optical fiber reflectometry technique (CP-ϕOTDR), which enables real time and long-range high-sensitivity bolometric measurements of solar radiance with a single optical fiber cable and a single interrogator unit. The method is explained and analyzed theoretically. A validation of the method is proposed using a solar simulator irradiating standard optical fibers, where we demonstrate the ability to detect and quantify solar irradiance with less than a 0.1 W/m2 resolution.

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Optical fiber sensing of corroded materials using optical fibers as remote probes

10.1117/12.2030599 ◽

2013 ◽

Author(s):

Juock Namkung ◽

Paul Kulowitch ◽

Andy Schwartz

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Fiber Sensing ◽

Optical Fiber Sensing

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Design and Implementation of a Fiber Optic Sensing Alarm System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.416-417.1548 ◽

2013 ◽

Vol 416-417 ◽

pp. 1548-1551

Author(s):

Zheng Dong Chen

Keyword(s):

Optical Fiber ◽

Fiber Optic ◽

Large Range ◽

High Sensitivity ◽

Alarm System ◽

Design And Implementation ◽

Fiber Sensing ◽

Optical Fiber Sensing ◽

Fiber Optic Sensing

In this paper, a design of optical fiber sensing alarm system based on, can realize high sensitivity, long perimeter, large range of perimeter protection, convenient installation.

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