Real time frequency domain fibreoptic temperature sensor using ruby crystals.

@article{Alcala1996RealTF,
  title={Real time frequency domain fibreoptic temperature sensor using ruby crystals.},
  author={Josefina Alcala and Stehen Shaoyi Liao and Jian-guo Zheng},
  journal={Medical engineering & physics},
  year={1996},
  volume={18 1},
  pages={51-6}
}
The excited state phosphorescence lifetime of ruby crystals is used to monitor temperature in the physiological range from 15 degrees to 45 degrees C with precision and accuracy less than 1 degree C, in real time. Precision of 0.1 degree C is attained with 3 min integration times. A 500 micron cubic ruby crystal bounded to the distal end of an optical fibre of similar core dimensions is excited with pulsed Ne-He laser light of about 9 microW average power. The instrument uses a sampler for data… CONTINUE READING

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