Design of a high temperature sensing system using luminescence lifetime measurement

Kamma, Indumathi; Kommidi, Praveena; Reddy, B. Rami

doi:10.1063/1.2981704

Cited by 15 publications

(20 citation statements)

References 17 publications

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“…The rod was inserted into a tube furnace except for the sample chamber that remained outside. The sample is in contact with the metal rod on five sides [15]. Fluoride crystals were obtained from Optovac, Inc., and oxide crystals were procured from Scientific Materials Corp.…”

Section: Methodsmentioning

confidence: 99%

“…For example, the energy gap between 4 F 3∕2 and 4 I 15∕2 is 5000 cm −1 [ Fig. 1(a)] and the cutoff phonon frequency of LaF 3 is 350 cm −1 [15]. This indicates that approximately 14 phonons are needed to bridge the energy gap.…”

Section: B Fluorescence Lifetime Sensingmentioning

confidence: 99%

“…Hence, there is a need for the development of alternate sensor technologies for high temperature measurement, preferably noncontact sensors with quick response times. To address these specific needs, we investigated the suitability of fluorescence lifetime sensing [15] and interferometer [16] techniques for temperature sensing, using rare-earth-ion-doped crystals and glasses.…”

Section: Introductionmentioning

confidence: 99%

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Optical sensing techniques for temperature measurement

2013

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Temperature is an important parameter that needs accurate measurement. Theoretical descriptions of the fluorescence ratio method, fluorescence lifetime sensing, and interferometric methods for temperature measurement are given. Fluorescence lifetime sensing calibration plots have been developed for temperature measurement from 20°C to 600°C using Er(3+)-doped glass, and from 20°C to 90°C using Sm(3+)-doped CaF(2). Lifetime sensing results of Pr(3+)-doped YAG and Ho(3+)-doped fluoride crystals for temperature measurement are also summarized. Mach-Zehnder interferometer measurements revealed that the passage of a 300 mW laser beam of 915 nm changed the temperature of the Yb(3+)-doped YAG crystal by 7.1°C. The interferometer technique is useful for measuring absolute temperature changes in laser cooling studies.

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Section: Methodsmentioning

confidence: 99%

Section: B Fluorescence Lifetime Sensingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical sensing techniques for temperature measurement

2013

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“…1 is the spectrum of exciting light and fluorescence in Y2O2S : Eu + Fe2O3. As for temperature measurement fluorescence optic-fiber sensor [8] is a newly emerging technique benefited from the well-developed fluorescence imaging [9] . Fluorescence lifetime-based temperature sensing method has attracted considerable research interest as it possesses the merits of intensityindependent.…”

Section: Fiber Optical Sensormentioning

confidence: 99%

Multifunction medical endoscope system with optical fiber temperature sensor

Zhou²,

Luo

et al. 2014

SPIE Proceedings

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Thermal therapy (or hyperthermia) is one of the effective operations for tumor treating and curing. As tumor tissues are more susceptible to heat than normal tissues, in thermal therapy operations, temperature on operation area is a crucial parameter for optimal treating. When the temperature is too low, the tumor tissues cannot be killed; otherwise, the temperature is too high, the operation may damage normal tissues around the tumor. During thermal therapy operation, the heating power is normally supplied by high-frequency EM field, so traditional temperature sensors, such as thermal couples, thermistors, cannot work stably due to EM interference. We present a multi-function endoscope optical fiber temperature sensor system. With this sensor setup based on principle of fluorescence life time, the temperature on operation point is detected in real time. Furthermore, a build-in endoscope centers in the fiber sensor, thus the operation area can be viewed or imaged directly during the operation. This design can navigate the operation, particularly for in vivo operations. The temperature range of the sensor system is 30℃-150℃, the accuracy can achieve to 0.2℃. The imaging fiber buddle is constituted of more than 50k fibers. As the sensor probe is very thin (around 4 mm in diameter), it can also be assembled inside the radiofrequency operation knife. With the presented sensor system in clinic operation physicians can check the temperature in the operation point and view the operation area at the same time.

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“…4 Another photonic temperature sensor reported in the literature is based on the measurement of luminescence life time of LaF 3 :Er 3+ . 5 But this optical sensor can work in the high temperature range, from 20 to 1000 • C, only. Bulk ruby crystal has been reported as photonic temperature sensor 6 which is found to be suitable in low as well as high temperature range.…”

mentioning

confidence: 99%

Note: Epitaxial ruby thin film based photonic sensor for temperature measurement

Kumari

Khare

2011

Review of Scientific Instruments

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Deposition of optical quality C-axis oriented epitaxial thin film of ruby via pulsed laser deposition technique on sapphire substrate is reported. The film is characterized by Raman spectra and photoluminescence spectra. The peak positions of R-line and the corresponding linewidth are observed to be temperature dependent. The sensitivity of R(1)-line position, υ, with the temperature, (dυ/dT), in the range of 138-368 K shows linear behavior confirming its applicability as temperature sensor.

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Design of a high temperature sensing system using luminescence lifetime measurement

Cited by 15 publications

References 17 publications

Optical sensing techniques for temperature measurement

Optical sensing techniques for temperature measurement

Multifunction medical endoscope system with optical fiber temperature sensor

Note: Epitaxial ruby thin film based photonic sensor for temperature measurement

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