Fiber-Optic Instrument for Temperature Measurement

Kyuma, Kazuo; Tai, Shuichi; Sawada, Takao; Nunoshita, Masahiro

doi:10.1109/tmtt.1982.1131092

Cited by 19 publications

(5 citation statements)

References 2 publications

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“…Complementary with tethered electrical sensors, such an optical-based technique is more suitable for use in environments with strong electromagnetic interferences, and in particular, capable of obtaining signals during magnetic resonance imaging (MRI). As a consequence, some commercially available fiber optic temperature sensors 40 , 41 based on the temperature-dependent optical properties, e.g., the bandgap of a GaAs crystal material, as the thermal transduction mechanisms have been put into practice 42 . Different from these semiconductor-based sensors via downconversion photoluminescence, our thin-film devices leverage the thermal behaviors of semiconductor bandgaps and diode junctions, which potentially provide improved sensitivities, and the upconversion mechanism minimizes tissue attenuation and autofluorescence associated with the use of visible excitation sources.…”

Section: Resultsmentioning

confidence: 99%

An Optoelectronic thermometer based on microscale infrared-to-visible conversion devices

Ding

Xue

et al. 2022

Light Sci Appl

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Thermometric detectors are crucial in evaluating the condition of target objects spanning from environments to the human body. Optical-based thermal sensing tools have received extensive attention, in which the photon upconversion process with low autofluorescence and high tissue penetration depth is considered as a competent method for temperature monitoring, particularly in biomedical fields. Here, we present an optoelectronic thermometer via infrared-to-visible upconversion, accomplished by integrated light receiving and emission devices. Fully fabricated thin-film, microscale devices present temperature-dependent light emission with an intensity change of 1.5% °C−1 and a spectral shift of 0.18 nm °C−1. The sensing mechanism is systematically characterized and ascribed to temperature dependent optoelectronic properties of the semiconductor band structure and the circuit operation condition. Patterned device arrays showcase the capability for spatially resolved temperature mapping. Finally, in vitro and in vivo experiments implemented with integrated fiber-optic sensors demonstrate real-time thermal detection of dynamic human activity and in the deep brain of animals, respectively.

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Section: Resultsmentioning

confidence: 99%

An Optoelectronic thermometer based on microscale infrared-to-visible conversion devices

Ding

Xue

et al. 2022

Light Sci Appl

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“…Basically, the Fabry-Perot temperature sensor (FPI) is a thin platelet of a material that has a temperature-dependent refractive index [1]. It is composed of two parallel reflecting surfaces separated by a certain distance called etalon and are classified into two categories: one is extrinsic and the other is intrinsic [2], [3]. The extrinsic FPI sensor uses the reflections from an external cavity formed out of the interesting fiber [4].…”

Section: Fabry-perot Interferometermentioning

confidence: 99%

Fiber-Optic Temperature Sensor Design Adapted For Libyan Environment

Saeed

Twati

2018

Proceedings of First Conference for Engineering Sciences and Technology: Vol. 1

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In this work, the design of the Fiber optic Temperature Sensor has been performed using two different techniques aimed at determining the optimum design parameters of the fiber optic sensor that should work properly in the Libyan environment (temperature:-13 to 57.8 degrees Celsius). The first technique is based on Fabry-Perot Interferometer that tracks the phase change of the received light by the interferometer due to the sensitivity of the Fabry-Perot's cavity to the surrounding temperature changes. Three different substances (GaAs, Ge and Si) were used in determining the optimum design parameters of the fiber optic sensor. The optical wavelength used is 1550nm with line width of 40nm. The material selected is Si where the optimum Fabry-Perot length was found to be 20.7µm. The second technique studied is based on Fiber Coupling Actuated by a Bimetal Strip to read the change in temperature with respect to coupling power loss. Three different standard Bimetal types were used for the design of the strip, (KANTAL 200 TB20110 Ni/MnNiCu), (KANTAL 135 Ni/NiMn-steel) and (KANTAL100 TB0965 Ni/NiMn-steel). The (KANTAL 200 TB20110 Ni/MnNiCu) Bimetal material was selected for the optimal sensor design. The optimum design length, delta deflection and thickness for the strip were found to be 5.6µm, 35µm and 1.3µm respectively.

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“…Optical temperature sensors are important in many thermometry applications because they provide immunity to electrical noise and exhibit better sensitivity, selectivity, and fast response. A variety of devices have been reported utilizing various methods, such as optical ber sensing, 1 surface plasmon resonance (change in dielectric constant and refractive index), 2 photoluminescence (change in intensity, peak position, and lifetime), [3][4][5][6][7] and shi in optical absorption edge, 8 to realize optical thermometers in different ranges. In particular, photoluminescence (PL) based temperature sensors are widely applicable because of their lowcost, simple preparation, easy instrumentation, noninvasive operation, and nondestructive technique for the detection of temperature even for living or cancer cells.…”

Section: Introductionmentioning

confidence: 99%

CdS : SiO₂ nanocomposite as a luminescence-based wide range temperature sensor

2015

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A wide range (20-560K) temperature sensor is devised for the first time from CdS:SiO 2 nanocomposite thin films grown by pulsed laser deposition. Highly intense, stable, and broad red emission observed from CdS:SiO 2 nanocomposite is employed to achieve the luminescence thermometer. Nearly monodispersity and small size of CdS nanocrystals (~ 3 nm) in SiO 2 matrix as viewed by transmission electron microscope may be accountable for the absence of band edge emission even at 20 K. The sensor exhibits almost linear behavior in all cryogenic, physiological, and high temperature ranges. The average sensitivity and resolution of the sensor reported here are ≈ 10 -2 K -1 and 10 -4 K respectively with a maximum relative sensitivity ~ 8.4 % K -1 at 120 K.

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Fiber-Optic Instrument for Temperature Measurement

Cited by 19 publications

References 2 publications

An Optoelectronic thermometer based on microscale infrared-to-visible conversion devices

An Optoelectronic thermometer based on microscale infrared-to-visible conversion devices

Fiber-Optic Temperature Sensor Design Adapted For Libyan Environment

CdS : SiO₂ nanocomposite as a luminescence-based wide range temperature sensor

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Fiber-Optic Instrument for Temperature Measurement

Cited by 19 publications

References 2 publications

An Optoelectronic thermometer based on microscale infrared-to-visible conversion devices

An Optoelectronic thermometer based on microscale infrared-to-visible conversion devices

Fiber-Optic Temperature Sensor Design Adapted For Libyan Environment

CdS : SiO2 nanocomposite as a luminescence-based wide range temperature sensor

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Product

Resources

About

CdS : SiO₂ nanocomposite as a luminescence-based wide range temperature sensor