1000 K optical ratiometric thermometer based on Erless than sup>3+less than /sup> luminescence in yttrium gallium garnet Articles uri icon


  • Hernandez Rodriguez, M. A.
  • Kamada, K.
  • Yoshikawa, A.
  • Casasnovas Melian, A.
  • Martin, I. R.
  • Rodriguez Mendoza, U. R.
  • Lavin, V.

publication date

  • December 2021

start page

  • 1

end page

  • 11


  • 161188


  • 886

International Standard Serial Number (ISSN)

  • 0925-8388

Electronic International Standard Serial Number (EISSN)

  • 1873-4669


  • The temperature dependence of the Er+3; green luminescence in Y3Ga5O12 crystal were analysed under
    ultraviolet and near-infrared laser excitations for optical sensing purposes. Changes in the relative green
    emission intensities from the 2H11/2 and 4S3/2 thermally-coupled multiplets to the 4I15/2 ground state were
    measured from room temperature up to 1000 K. The calibrated temperature scale shows a maximum in the
    absolute thermal sensitivity of ~23.9 × 10−4K−1 at 580 K and a relative thermal sensitivity of ~1.36%K−1 at RT,
    combining results for both blue and near-infrared laser excitations. The excellent results obtained, com-
    pared with other Er3+-based optical temperature sensors, are a consequence of the advantages of garnet
    crystals as optically efficient hosts that, apart from an impressive capability to be synthesized both as bulk
    and fiber forms, allow extending the long working temperature range up to 1000 K, and beyond, to the
    melting point limit close to 2000 K. In addition, the use of green emissions for the temperature calibration,
    with negligible black-body radiation disturbance, only needs a low-cost, basic setup that uses commercially
    available lenses, lasers and detectors. All these facts support the Er3+-doped Y3Ga5O12 garnet crystal as a
    potential candidate as temperature sensor, showing large sensitivity and good temperature resolution for
    ultra-high temperature industrial applications.


  • Materials science and engineering
  • Physics


  • er3+-doped y3ga5o12 garnet crystal; micro-pulling down technique; optical temperature sensor; ultra-high temperature industrial applications