The Experts below are selected from a list of 163230 Experts worldwide ranked by ideXlab platform
Wenwu Cao - One of the best experts on this subject based on the ideXlab platform.
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a precise boltzmann distribution law for the Fluorescence Intensity ratio of two thermally coupled levels
Applied Physics Letters, 2016Co-Authors: Feng Qin, Zhiguo Zhang, Wenwu Cao, Hua Zhao, Wei CaiAbstract:Noncontact monitoring temperature is very important in modern medicine, science, and technologies. The Fluorescence Intensity ratio (FIR) technique based on the Boltzmann distribution law exhibits excellent application potential, but the observed FIR deviates from the Boltzmann distribution law in the low temperature range. We propose a Fluorescence Intensity ratio relation FIR* = ηFIR by introducing a quantity η representing thermal population degree, which can be obtained from measured Fluorescence decay curves of the upper emitting level. Using Eu3+ as an example, the method is confirmed that the deviated FIR is able to be corrected and return to follow the Boltzmann law.
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Fluorescence Intensity ratio method for temperature sensing
Optics letters, 2015Co-Authors: Yuan Zhou, Feng Qin, Yangdong Zheng, Zhiguo Zhang, Wenwu CaoAbstract:A thermometry method based on the ratio between the valley Intensity formed by Fluorescence peak overlap and the peak Fluorescence Intensity has been developed. Excited by a 405 nm laser, the valley to peak ratio (VPR) of the emissions originating from 5D0 to 7F2 Stark sublevels in Eu3+-doped CaWO4 shows a monotonic change with temperature. Spectrum analysis indicates that this monotonic increase is caused by the homogeneous broadening of the spectral lines as the temperature increases. The relative sensitivity S(r) is in the magnitude of 10(-4) K(-1) in the experimental temperature range of 303-573 K.
Gregory W Baxter - One of the best experts on this subject based on the ideXlab platform.
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Fluorescence Intensity ratio technique for optical fiber point temperature sensing
Journal of Applied Physics, 2003Co-Authors: Scott A. Wade, Stephen F Collins, Gregory W BaxterAbstract:The Fluorescence Intensity ratio technique for optical fiber-based point temperature sensing is reviewed, including the materials suitable for this technique. The temperature dependence of the Fluorescence Intensity ratio has been studied using thermally coupled energy levels in seven different rare earth ions doped into a variety of glasses and crystals. Sensor prototypes developed using Pr3+:ZBLANP, Nd3+-doped silica fiber and Yb3+-doped silica fiber as the sensing material have been used to measure temperatures covering the range of approximately −50 to 600 °C with a resolution of the order of 1 °C.
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nd3 doped optical fiber temperature sensor using the Fluorescence Intensity ratio technique
Review of Scientific Instruments, 1999Co-Authors: Scott A. Wade, Stephen F Collins, J C Muscat, Gregory W BaxterAbstract:An optical fiber temperature sensor employing the Fluorescence Intensity ratio using Nd3+-doped silica fiber and exhibiting high sensitivity is presented. The development and construction of the sensor, which requires relatively simple electronics and data analysis, is described together with its calibration over the −50 to +500 °C temperature range.
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self referenced point temperature sensor based on a Fluorescence Intensity ratio in yb 3 doped silica fiber
Applied Optics, 1997Co-Authors: Eric Maurice, Scott A. Wade, Stephen F Collins, Gerard Monnom, Gregory W BaxterAbstract:An optical fiber temperature sensor, based on the Fluorescence Intensity ratio from the 2F5/2a and 2F5/2b Stark sublevels in ytterbium-doped silica fiber, has been investigated. Results of a sensor prototype demonstrate an accuracy near 1 °C in a 600 °C temperature range. Changes in the Fluorescence Intensity ratio because of variation in pump power, pump wavelength, and induced fiber bending loss are demonstrated to be small, supporting development of a practical sensor based on the technique described.
Scott A. Wade - One of the best experts on this subject based on the ideXlab platform.
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Fluorescence Intensity ratio technique for optical fiber point temperature sensing
Journal of Applied Physics, 2003Co-Authors: Scott A. Wade, Stephen F Collins, Gregory W BaxterAbstract:The Fluorescence Intensity ratio technique for optical fiber-based point temperature sensing is reviewed, including the materials suitable for this technique. The temperature dependence of the Fluorescence Intensity ratio has been studied using thermally coupled energy levels in seven different rare earth ions doped into a variety of glasses and crystals. Sensor prototypes developed using Pr3+:ZBLANP, Nd3+-doped silica fiber and Yb3+-doped silica fiber as the sensing material have been used to measure temperatures covering the range of approximately −50 to 600 °C with a resolution of the order of 1 °C.
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nd3 doped optical fiber temperature sensor using the Fluorescence Intensity ratio technique
Review of Scientific Instruments, 1999Co-Authors: Scott A. Wade, Stephen F Collins, J C Muscat, Gregory W BaxterAbstract:An optical fiber temperature sensor employing the Fluorescence Intensity ratio using Nd3+-doped silica fiber and exhibiting high sensitivity is presented. The development and construction of the sensor, which requires relatively simple electronics and data analysis, is described together with its calibration over the −50 to +500 °C temperature range.
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self referenced point temperature sensor based on a Fluorescence Intensity ratio in yb 3 doped silica fiber
Applied Optics, 1997Co-Authors: Eric Maurice, Scott A. Wade, Stephen F Collins, Gerard Monnom, Gregory W BaxterAbstract:An optical fiber temperature sensor, based on the Fluorescence Intensity ratio from the 2F5/2a and 2F5/2b Stark sublevels in ytterbium-doped silica fiber, has been investigated. Results of a sensor prototype demonstrate an accuracy near 1 °C in a 600 °C temperature range. Changes in the Fluorescence Intensity ratio because of variation in pump power, pump wavelength, and induced fiber bending loss are demonstrated to be small, supporting development of a practical sensor based on the technique described.
David S Ginger - One of the best experts on this subject based on the ideXlab platform.
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dependence of Fluorescence Intensity on the spectral overlap between fluorophores and plasmon resonant single silver nanoparticles
Nano Letters, 2007Co-Authors: Yeechi Chen, Keiko Munechika, David S GingerAbstract:We investigate the Fluorescence from dyes coupled to individual DNA-functionalized metal nanoparticles. We use single-particle darkfield scattering and Fluorescence microscopy to correlate the Fluorescence Intensity of the dyes with the localized surface plasmon resonance (LSPR) spectra of the individual metal nanoparticles to which they are attached. For each of three different dyes, we observe a strong correlation between the Fluorescence Intensity of the dye and the degree of spectral overlap with the plasmon resonance of the nanoparticle. On average, we observe the brightest Fluorescence from dyes attached to metal nanoparticles that have a LSPR scattering peak ∼40−120 meV higher in energy than the emission peak of the fluorophore. These results should prove useful for understanding and optimizing metal-enhanced Fluorescence.
Stephen F Collins - One of the best experts on this subject based on the ideXlab platform.
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Fluorescence Intensity ratio technique for optical fiber point temperature sensing
Journal of Applied Physics, 2003Co-Authors: Scott A. Wade, Stephen F Collins, Gregory W BaxterAbstract:The Fluorescence Intensity ratio technique for optical fiber-based point temperature sensing is reviewed, including the materials suitable for this technique. The temperature dependence of the Fluorescence Intensity ratio has been studied using thermally coupled energy levels in seven different rare earth ions doped into a variety of glasses and crystals. Sensor prototypes developed using Pr3+:ZBLANP, Nd3+-doped silica fiber and Yb3+-doped silica fiber as the sensing material have been used to measure temperatures covering the range of approximately −50 to 600 °C with a resolution of the order of 1 °C.
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nd3 doped optical fiber temperature sensor using the Fluorescence Intensity ratio technique
Review of Scientific Instruments, 1999Co-Authors: Scott A. Wade, Stephen F Collins, J C Muscat, Gregory W BaxterAbstract:An optical fiber temperature sensor employing the Fluorescence Intensity ratio using Nd3+-doped silica fiber and exhibiting high sensitivity is presented. The development and construction of the sensor, which requires relatively simple electronics and data analysis, is described together with its calibration over the −50 to +500 °C temperature range.
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self referenced point temperature sensor based on a Fluorescence Intensity ratio in yb 3 doped silica fiber
Applied Optics, 1997Co-Authors: Eric Maurice, Scott A. Wade, Stephen F Collins, Gerard Monnom, Gregory W BaxterAbstract:An optical fiber temperature sensor, based on the Fluorescence Intensity ratio from the 2F5/2a and 2F5/2b Stark sublevels in ytterbium-doped silica fiber, has been investigated. Results of a sensor prototype demonstrate an accuracy near 1 °C in a 600 °C temperature range. Changes in the Fluorescence Intensity ratio because of variation in pump power, pump wavelength, and induced fiber bending loss are demonstrated to be small, supporting development of a practical sensor based on the technique described.