Remote Temperature Sensor Based on the Up-Conversion Fluorescence Power Ratio of an Erbium-Doped Silica Fiber Pumped at 975 nm

Abstract

This article presents experimental results demonstrating the performance of an erbium-doped silica fiber as a remote temperature sensor in the interval from 20 ı C to 200 ı C. The sensor is based on the change in the fluorescence intensity ratio of two spectral bands as a function of temperature. The green fluorescence signal was generated by up-conversion processes in the erbium-doped fiber pumped at 975 nm. A radiometric analysis was applied to the erbium-doped fiber to evaluate its performance as a temperature sensor, and the results from this analysis were compared against other rare-earth-doped fiber sensors that utilize the intensity ratio technique.

Temperature Sensing Characteristics of Tapered Doped Fiber Amplifiers

“…The development of temperature and strain fiber sensors for environmental measurements where immunity to electromagnetic interference and high personal safety are required has been studied with great interest until today. This fact has allowed the development of a large number of fiber optic temperature sensors based in different principles and desgins; among them, we can distinguish two principal groups which are based in doped [3][4][5][6][7][8][9][10] and un-doped fibers [11][12][13][14][15][16][17]. In the first group, we have sensors that use the temperature dependence of the fluorescence lifetime and involve techniques as the fluorescence intensity ratio.…”

“…In this context, the gradual progress to develop improved temperature fiber sensors requires the necessity to explore continuously novel configurations based on the sensing techniques described above. At this point, one interesting proposal is to consider the use of a tapered fiber, amply used as a temperature fiber sensor [11][12][13][14][15][16][17], inscribed simultaneously in a doped fiber amplifier, which poses an additional temperature response caused by its cross-sections [3][4][5][6][7][8][9][10][18][19][20][21]. At this respect, only the efficiency of pump absorption in tapered doped fiber lasers has been studied [23,24], but a detailed analysis of its temperature response has not be performed.…”

Enhancing of thermal effects in ultra-fattening Yb-doped fiber lasers

“…A large number of fiber optic temperature sensors based on different principles and structures have been developed; between them, we can distinguish two principal groups which are based in doped [10][11][12][13][14][15][16][17] and un-doped fibers [18][19][20][21][22][23][24]. In the first group, we can mention sensors based in the temperature dependence of the fluorescence lifetime of rare-earth doped fibers, and techniques based in the fluorescence intensity ratio, or by using the linear variation with temperature of the amplified spontaneous emission in doped fiber amplifiers [10][11][12][13][14][15][16][17]. In these sensors, the key point is the temperature dependence of the pump and signal cross-sections of the doped fiber.…”

Temperature sensing characteristics of tapered Tm3+-doped fiber amplifiers

“…In this context, several fiber optic temperature sensors based on different principles and structures have been developed. Among them we can distinguish two main groups based on doped [1][2][3][4][5][6][7][8] and un-doped fibers [9][10][11][12][13][14][15][16]. In the first group, sensors based on the temperature dependence of the fluorescent lifetime of rare-earth doped fibers, and techniques based on the fluorescence intensity ratio under different temperature conditions are included [1][2][3][4][5][6][7][8].…”