Abstract
To optimize the optical fiber temperature sensor employing the deep-grooved process, a novel scheme was proposed. Fabricated by the promising CO2 laser irradiation system based on the two-dimensional scanning motorized stage with high precision, the novel deep-grooved optical fiber temperature sensor was obtained with its temperature sensitivity of the transmission attenuation −0.107 dB/°C, which was 18.086 times higher than the optical fiber sensor with the normal depth of grooves while other parameters remained unchanged. The principal research and experimental testing showed that the designed temperature sensor measurement unit had the ability of high sensitivity in transmission attenuation and insensitivity to the wavelength, which offers possible applications in engineering.
Highlights
The temperature sensor fabricated by the optical fiber materials has attracted significant attentions of researchers, owing to the advantages of their light volume, high sensitivity, short response time, anti-electromagnetic interference, and corrosion resistance in recent years [1]
A novel optical fiber temperature sensor (OFTS) employing the deep-grooved process which was fabricated by the CO2 laser irradiation system to carve the grooves with certain depth was proposed
Based on realizing the similar sensitivity of the resonant wavelength, the sensitivity of transmission attenuation could be increased by deepening the depth of the grooves on one side of the fiber when the temperature increased
Summary
The temperature sensor fabricated by the optical fiber materials has attracted significant attentions of researchers, owing to the advantages of their light volume, high sensitivity, short response time, anti-electromagnetic interference, and corrosion resistance in recent years [1]. Various types of temperature sensors in the optical fiber have been employed to achieve superior precision, which still have intrinsic defects such as the poor stability, numerous cycle numbers, long length, and low sensitivity to the temperature [2,3,4,5]. A novel optical fiber temperature sensor (OFTS) employing the deep-grooved process which was fabricated by the CO2 laser irradiation system to carve the grooves with certain depth was proposed. This deep-grooved OFTS obtained a large dip attenuation of –33.85 dB at the resonant wavelength of 1426.7 nm, which was achieved in a
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