12 August 2015 Characteristic of high temperature structural long period grating fabricated by femtosecond laser
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Proceedings Volume 9624, 2015 International Conference on Optical Instruments and Technology: Micro/Nano Photonics and Fabrication; 962407 (2015) https://doi.org/10.1117/12.2192814
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China
Abstract
Structural Long period gratings (LPGs) in photonic crystal fiber (PCF) were successfully fabricated using the femtosecond laser micromachining system by introducing periodic side-holes. High temperature characterizations of the fabricated gratings have been performed. The structural gratings written with the femtosecond laser micromachining technique can suffer a low shift of the resonance wavelengths with sensitivity of 23pm/oC while the temperature is increased from 20°C to 1200°C. The LPGs have been found to have negligible temperature sensitivity whilst exhibiting useful strain (-1.86pm/με)and strong directional bend sensitivity with -4.40nm•m (180°) and -2.79nm•m (0°) at low temperature. The unique sensing characteristics enable many potential sensing applications in high temperature environments, such as space aircraft, nuclear power plants, and the chemical industry.
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Shujing Liu, Shujing Liu, Mingyan Luo, Mingyan Luo, Qiang Ji, Qiang Ji, } "Characteristic of high temperature structural long period grating fabricated by femtosecond laser", Proc. SPIE 9624, 2015 International Conference on Optical Instruments and Technology: Micro/Nano Photonics and Fabrication, 962407 (12 August 2015); doi: 10.1117/12.2192814; https://doi.org/10.1117/12.2192814
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