Fiber-optic high-temperature sensor based on the fluorescence lifetime of alexandrite
- 1 August 1992
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 63 (8) , 3869-3873
- https://doi.org/10.1063/1.1143285
Abstract
A fiber‐optic sensor for continuous temperature measurement from room temperature to ≳700 °C is presented. The device is based upon the excitation of the synthetic crystal alexandrite with light from a diode laser operating at 670 nm and the measurement of its fluorescence lifetime. A simple low cost optical configuration is described together with the introduction of a new effective signal processing scheme for fluorescence lifetime measurement, and a high sensitivity and repeatability are observed, at best ±1 °C.Keywords
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