The development and performance of a high-temperature optical fiber point sensor based on fluorescence decay time of a Chromium-doped material are reported, The device exploits a novel digital signal processing scheme for decay time measurement, It is based on a modified phase-sensitive-detection technique with the phase locked to a fixed value and the modulation frequency tracking the measured decay time, The sensor was calibrated in the temperature range from -25 to 500 degrees C with a 0.1 degrees C resolution, Remarkable features are the system immunity to fluorescent intensity losses and the long-term stability, showing a maximum drift of 0.3 degrees C over more than 600 h.
DIGITAL OPTICAL-FIBER POINT SENSOR FOR HIGH-TEMPERATURE MEASUREMENT / Fernicola, Vito; Crovini, L.. - In: JOURNAL OF LIGHTWAVE TECHNOLOGY. - ISSN 0733-8724. - 13:7(1995), pp. 1331-1334. [10.1109/50.400680]
DIGITAL OPTICAL-FIBER POINT SENSOR FOR HIGH-TEMPERATURE MEASUREMENT
FERNICOLA, VITO;
1995
Abstract
The development and performance of a high-temperature optical fiber point sensor based on fluorescence decay time of a Chromium-doped material are reported, The device exploits a novel digital signal processing scheme for decay time measurement, It is based on a modified phase-sensitive-detection technique with the phase locked to a fixed value and the modulation frequency tracking the measured decay time, The sensor was calibrated in the temperature range from -25 to 500 degrees C with a 0.1 degrees C resolution, Remarkable features are the system immunity to fluorescent intensity losses and the long-term stability, showing a maximum drift of 0.3 degrees C over more than 600 h.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
