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  • American Institute of Physics (AIP)  (43)
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  • 1
    Electronic Resource
    Electronic Resource
    Fiber-optic absorption temperature sensor using fluorescence reference channel (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 1175-1178 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this work a fiber-optic thermometer is demonstrated, using the change in absorption characteristics of a doped glass plate as the principle of operation of the transducer. A novel reference channel, generated at the sensor element itself is used, based on the fluorescence induced in a piece of neodymium/glass. Operation from −60 to 200 °C is reported and the potential for higher temperature operation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138624
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  • 2
    Electronic Resource
    Electronic Resource
    Infrared fluorescence "decay-time'' temperature sensor (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1784-1787 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The principle of the change in the "decay time'' of the fluorescence of a small sample of neodymium in a glass matrix, excited by infrared radiation from a high-power light emitting diode has been used in the construction of a fiber-optic temperature sensor. Such a device is an inexpensive transducer and has demonstrated a fiber-optic sensor not requiring referencing to the intensity of the exciting radiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138094
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  • 3
    Electronic Resource
    Electronic Resource
    Erbium/ytterbium fluorescence based fiber optic temperature sensor system (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 4017-4022 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Erbium/ytterbium co-doped fibers have been investigated in this work for the first time to determine their potential in thermometry applications based on the use of fluorescence decay. Several samples have been used and their performance characteristics determined. These have included studies of fiber annealing as well as thermal cycling tests and it was found that unlike other rare-earth ion doped fibers previously studied, such as Nd3+, Er3+, or Tm3+ doped fibers, the Er/Yb co-doped samples used here have shown a much smaller degree of thermal annealing when their thermal characteristics have been evaluated and compared. The response of the thermometer and the error in the measurement was found to be, at 〈±5 °C, within the stability of the oven used in the tests over a wide temperature range from 0 to 850 °C. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1289682
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  • 4
    Electronic Resource
    Electronic Resource
    Probe design aspects of ruby decay-time fluorescent sensors (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 87-89 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This paper describes the design, construction, and testing of fiber-optic probes for temperature monitoring. Results obtained over a temperature range of 20–160 °C demonstrate the usefulness of crushed crystal ruby, in several different configurations, as a means of temperature measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140583
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  • 5
    Electronic Resource
    Electronic Resource
    Ruby decay-time fluorescence thermometer in a fiber-optic configuration (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 1328-1335 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this article, a fluorescence decay-time thermometer using ruby crystal as the transducer material and carefully designed signal processing, with a light-emitting diode source and solid-state optical detection is reported. Results over a range to 170 °C are discussed with a standard deviation in the measurement, at best, corresponding to ±0.04 K, in laboratory tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140257
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  • 6
    Electronic Resource
    Electronic Resource
    Fluorescence referencing for fiber-optic thermometers using visible wavelengths (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 256-259 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A fiber-optic temperature sensor, operating on the principle of differential absorption effects with temperature, has been constructed using visible wavelength sensing and a ruby fluorescence-based internally generated reference scheme. Results of an investigation of the system and a comparison with previous work by the authors on a related system are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140275
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  • 7
    Electronic Resource
    Electronic Resource
    Intrinsic strain and temperature characteristics of Yb-doped silica-based optical fibers (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 1447-1451 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An investigation of strain and temperature characteristics of Yb-doped fibers has been carried out in this article. Results obtained are compared with those reported on Nd-doped fibers, showing that the lifetime variation rate of the single mode Yb-doped fiber with increasing strain is temperature independent, and within experimental error similar to that of Nd, although in each case, the fiber modes, the dopant concentration level, and the rare earth ion itself are different. Their stable behavior may form the basis of a dual element sensor with which to obtain stress and temperature information independently in so-called "smart structures." © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149603
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  • 8
    Electronic Resource
    Electronic Resource
    Thermal characteristics of alexandrite fluorescence decay at high temperatures, induced by a visible laser diode emission (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 3493-3498 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Resulting from an experimental study to develop a fiber-optic temperature sensor based on the fluorescence decay of Cr3+-doped crystalline alexandrite, a simple configurational coordinate model is proposed to describe the kinetics of alexandrite fluorescence over the temperature region from 20 to 700 °C, to link experimental and theoretical work. This model fits well the experimental fluorescence lifetime data over the above region and successfully explains the observed phenomenon that a sharp reduction in the fluorescence lifetime occurs beyond ∼400 °C. The model was also used to study the temperature dependence of the intensity of the fluorescence emission induced by light from a visible laser diode, and as a result it is suggested that a phonon-assisted absorption is involved in a specific absorption process, where the energy of a single incident photon is below that of the primary absorption band 4T2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354054
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  • 9
    Electronic Resource
    Electronic Resource
    Ruby fluorescence wavelength division fiber-optic temperature sensor (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1231-1234 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A LED-based fiber-optic temperature sensor is developed which uses the change in the wavelength distribution of emission of fluorescence from a small sample of pink ruby as the means of sensing temperature. An all fiber-optic system is described using simple electronics to measure temperature in the range from 293 to 433 K, with an accuracy of ±3 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139443
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  • 10
    Electronic Resource
    Electronic Resource
    Thulium-doped intrinsic fiber optic sensor for high temperature measurements (〉1100 °C) (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 3210-3214 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The need to achieve higher temperature performance from fluorescence-based optical thermometers has prompted the investigation of a range of rare-earth doped materials. In this work, results are presented on the use of a thulium-doped fiber-based system. The performance of the thermometer is presented, and stable measurements at temperatures up to 1250 °C are reported using the fluorescence lifetime approach. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149085
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