Long-period fiber grating with multi resonant wavelengths fabricated by a CO2 laser for distributed sensing
Long-period fiber grating with multi resonant wavelengths fabricated by a CO2 laser for distributed sensing
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DOI：
10.1109/icp.2011.6106811
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发表时间：
2011-12
期刊：
影响因子：
--
通讯作者：
Y. Katsuyama;O. Koyama
中科院分区：
文献类型：
--
作者：
Y. Katsuyama;O. Koyama
利用CO2激光器研制了多长周期光栅（multi- lpg）传感器，用于核电站和大型化工厂异常高温的分布式检测。为了制造多液化气传感器，引入了一种雕刻液化气，以便于在相似的损耗谱下制作不同谐振波长的多液化气传感器。实验研究了CO2激光束在雕刻中的扫描方式。阐明了CO2激光辐照能量对雕刻的影响，发现CO2激光存在最小辐照能量，确定其值为0.23 J/mm。结果表明，该方法可以制备出雕刻的液化气，并成功地实现了分布式传感器谐振波长的移位。详细介绍了纤维雕刻的工艺和雕刻的基本特点。
A multi long-period grating (multi-LPG) sensor was investigated and fabricated by a CO2 laser for distributed sensing to detect abnormal high temperatures of a nuclear power generator and a large-scale chemical plant. To fabricate the multi-LPG sensor, a carved LPG was introduced for easy fabrication of the multi-LPGs with different resonant wavelengths in a similar loss spectrum. It was investigated experimentally how the CO2 laser beam is scanned for the carving. The influence of the irradiated energy of the CO2 laser on carving has been clarified, and it was found that a minimum irradiated energy of the CO2 laser existed, and the value was determined to be 0.23 J/mm. As a result, the carved LPG could be fabricated and the resonant wavelength could be shifted successfully for the distributed sensor. The procedures for the fiber carving and the fundamental characteristics of the carving are described in details.