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2 edition of Fluorescence lifetime sensor using optical fiber and optical signal processing. found in the catalog.

Fluorescence lifetime sensor using optical fiber and optical signal processing.

William Heuywon Park

Fluorescence lifetime sensor using optical fiber and optical signal processing.

by William Heuywon Park

  • 343 Want to read
  • 7 Currently reading

Published .
Written in English


Edition Notes

Thesis (M.A.Sc.) -- University of Toronto, 1998.

The Physical Object
Pagination71 p.
Number of Pages71
ID Numbers
Open LibraryOL20200631M

Two Examples of Lifetime-Based Fluorescence Thermometers (i) Sapphire-Ruby Single-Crystal Fiber Thermometers A fluorescence lifetime measurement system recently developed by Grattan et al. [] for use in OFT is shown Figure this system, a laser diode (LD) with 5 mW optical output at a wavelength of nm is used as the light source, well suited to the excitation of the ruby. CMOS sensors, oxygen sensor, optical fiber sensor, phase detection. INTRODUCTION Recently, there has been considerable research interest in the development of optical sensors for medical, industrial and environmental applications. Most optical sensors are based on either measuring the changes in luminescence in- tensity or lifetime.

  Fiber optic chemical sensor systems generally comprise a light source, optic fiber(s), a detector sensor, optical filters, analog signal amplifiers, and signal processing hardware and software. Optical radiation of the wavelength or range selected by an optical filter is directed into the core of the optical fiber. Nigel J. Emptage's 66 research works with 1, citations and 3, reads, including: A two-compartment model of synaptic computation and plasticity.

A fiber-optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors"). Fibers have many uses in remote sensing. Depending on the application, fiber may be used because of its small size, or because no electrical power is needed at the. A kind of fluorescence optic-fiber temperature sensor is studied. It used sapphire fiber thermal probe, making use of the method that FFT transformation to carry on a processing to the fluorescence signal. Among the detection range from 0 to °C, the thermometer has an average temperature resolution of °C. The experimental results show that this temperature measuring system can.


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Fluorescence lifetime sensor using optical fiber and optical signal processing by William Heuywon Park Download PDF EPUB FB2

Chapter 1 Introduction Many have used optical fiber sensor and fluorescent lifetime to measure such parameters as temperature, pH, O2 concentration, optical fiber allows one to excite and coilect the fluorescent signal from a remote medium that may otherwise be ciifficuit to access.

The lifetime of fluorescence decay is chosen because the decay mechanism is weU understood, is sensitive. The monitoring of the fluorescence lifetime of selected materials has been one of the more successful schemes in optical fiber temperature sensing.

In principle, both the rise of the fluorescent signal at constant excitation and its decay are described by a first-order exponential, where the time constant. is a function of the by: 1.

A novel signal processing approach, which results in a significant improvement in the measurement resolution for a ruby-based fiber optic temperature sensor, is proposed.

The technique discussed is based on the phase-sensitive detection (lock-in) of the fluorescent by: 1. A novel signal processing approach, which results in a significant improvement in the measurement resolution for a fluorescent decay‐time‐based fiber optic temperature sensor, is proposed.

The technique discussed is based on the phase sensitive detection (lock‐in) of the fluorescent signal. As with the other phase‐sensitive detection techniques, it has the significant advantage of a Cited by: often using optical means, and there are a number of special uses of an optical thermometer in potential monitoring and care.

Fiber optic fluorescence techniques show real potential for use over the biomedical region [1,2].Therefore, in this paper, a kind of fluorescence optic-fiber thermometer is. Optical fiber sensors have been developed to measure a wide variety of parameters, the most common of these use the fluorescence lifetime, achieve the desired level of signal amplification.

Instead of using air as the transmission medium, optical sensors can use fiber optic cable to transmit light between a source and a detector. Fiber optic cables can be made from either plastic or glass fibers or a combination of the two, though it is now rare to find.

Extrinsic fiber optic sensors use a fiber optic cable, normally a multimode one, to transmit modulated light from a conventional sensor such as a resistance thermometer. A major feature of extrinsic sensors, which makes them so useful in such a large number of applications, is their ability to reach places that are otherwise inaccessible.

Successful development of a micro-total-analysis system (µTAS, lab-on-a-chip) is strictly related to the degree of miniaturization, integration, autonomy, sensitivity, selectivity, and repeatability of its detector.

Fluorescence sensing is an optical detection method used for a large variety of biological and chemical assays, and its full integration within lab-on-a-chip devices remains a.

Lo proposed a fluorescence sensor using an optical fiber as the conducting material. The system used digital signal processing technology to modulate the LED in the light source part and a digital signal processing chip to enhance the measurement of the fluorescence signal, reducing the bending loss in the optical fiber transmission process.

A new, simple signal processing, low-cost technique for the fabrication of a portable oxygen sensor based on time-resolved fluorescence is described.

The sensing film uses the oxygen sensing dye platinum meso-tetra (pentfluorophenyl) porphyrin (PtTFPP) embedded in a polymer matrix. The ratio τ0/τ measures sensitivity of the sensing film, where τ0 and τ represent the.

Bosselmann, A. Reule, and J. Schröder, Fibre-optic temperature sensor using fluorescence decay time, Proc. of 2nd Conf. on Optical Fibre Sensors (OFS’ 84). Hence, most of optical fiber chemical sensors use bifurcated fibers (Figure 2a) or a single fiber with a semi-transparent mirror (Figure 2b).

In both cases, the chemical sensor (or the sample to analyze) is placed near or in the end of fiber, depending on fiber. Temperature sensor with microstructure fiber based ruby fluorescence lifetime Temperature sensor with microstructure fiber based ruby fluorescence lifetime Hou, Jianping Tel: Fax: Tel: 2nd International Symp.

on Adv. Optical Manufac. and Testing Tech.: Optical Test and Measurement Tech. and. Fluorescent biosensors have been widely used in biomedical applications.

To amplify the intensity of fluorescence signals, this study developed a novel structure for an evanescent wave fiber-optic biosensor by using a Fabry-Perot resonator structure. An excitation light was coupled into the optical fiber through a laser-drilled hole on the proximal end of the resonator.

Fiber optic pH/Ca2+ fluorescence microsensor based on spectral processing of sensing signals. Analytica Chimica Acta(), (99) María D.

Marazuela, María C. Moreno-Bondi, Guillermo Orellana. OFS temperature sensors exploit a range of transduction principles, such as temperature dependent fluorescence lifetime [49–52], Rayleigh scattering (change in the amplitude of the back-reflected signal with temperature) and thermal expansion and the thermo-optic effect in FBGs [54–56], LPGs and FPIs [57, 58].

The etching mechanism is modelled and etched tips are characterized both geometrically and optically in a fluorescence glucose sensor chemistry.

A Zemax model of the CPC tipped sensor predicts an optimal improvement in light capturing efficiency of a factor of compared to the conventional sensor with a plane-cut fiber tip.

Fiber-optic Sensor for Continuous Monitoring of Fermentation pH. Nature Biotechnology11 (6), DOI: /nbt Stanley M. Klainer, Johnny R. Thomas, John C. Francis. Fiber-optic chemical sensors offer a realistic solution to environmental monitoring needs.

fluorescence signal then travels back up the optical fiber (or a second optical fiber) in the opposite direction ofthe exciting light and is focused onto the slit ofa spectrometerfor analysis.

The advantage ofthis technique for geothermal well measurements is that the instrumentation remains aboveground and only the optical fiber is placed in. Fluorescence optical-fiber temperature sensor based on Planck’s law is studied in this paper. Sapphire fiber is adopted as thermal probe.

With steady physical chemistry performance, higher melting point, low loss in the waveband of ~ μm, sapphire fiber is very attractive for temperature optical fiber sensing and near infrared energy delivery.Unlike other optical pH systems that measure fluorescence, this system is ratiometric and immune to drift; the sensors can be stabilized by steam or gamma radiation; and they can be used with O 2 optrodes to provide pH and O 2 sensing in a small common package.

Furthermore, these optrodes can use "off-the-shelf detection"--miniature fiber-optic. Christian Grundahl Frankær, Kishwar J Hussain, Tommy C Dôrge, Thomas Just Sørensen, An Optical Chemical Sensor using Intensity Ratiometric Fluorescence Signals for Fast and Reliable pH Determination, ACS Sensors, /acssensors.8b, ().