| 小芯径多模光纤拉曼分布式温度传感器 |
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| 引用本文： | 何祖源,刘银萍,马麟,杨晨,童维军. 小芯径多模光纤拉曼分布式温度传感器[J]. 红外与激光工程, 2019, 48(4): 422002-0422002(7). DOI: 10.3788/IRLA201948.0422002 |
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| 作者姓名： | 何祖源 刘银萍 马麟 杨晨 童维军 |
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| 作者单位： | 1.长飞光纤光缆股份有限公司 光纤光缆制备技术国家重点实验室,湖北 武汉 430074; |
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| 基金项目： | 国家重点研发计划（2017YFB0405500）;国家自然科学基金（61775138） |
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| 摘 要： | 设计并制作了一种用于拉曼分布式温度传感的具有大有效模场面积和低模式色散的渐变折射率的小芯径多模光纤，同时达到了高空间分辨率和高温度分辨率。在现有的拉曼分布式温度传感系统基础上，测量了使用不同传感光纤和注入条件下的温度和空间分辨率。在满注入工作模式下，基于小芯径多模光纤的拉曼分布式温度传感器在25 km处达到了1℃的温度分辨率，空间分辨率的劣化仅为0.13 m，作为对比，使用多模光纤的拉曼分布式温度传感器的空间分辨率劣化了1.58 m。在单模注入条件下，基于小芯径多模光纤的拉曼分布式温度传感器在25 km处达到了4.7℃的温度分辨率，相对使用单模光纤有2.2℃的提升，同时空间分辨率没有劣化。
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| 关 键 词： | 光纤传感 温度传感器 拉曼散射 光时域反射计 |
| 收稿时间： | 2018-11-16 |
Raman distributed temperature sensor using multimode fiber with reduced core size |
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| Affiliation: | 1.State Key Laboratory of Optical Fiber and Cable Manufacture Technology,Yangtze Optical Fiber and Cable Joint Stock Limited Company(YOFC),Wuhan 430074,China;2.State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China |
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| Abstract: | A graded-index multimode fiber (GI-MMF) with reduced core size was designed and fabricated with large effective mode area and low intermodal dispersion for Raman distribution temperature sensor (RDTS) to simultaneously achieve high spatial and temperature resolution. In experiment, the temperature and spatial resolution of the RDTS was measured using different types of fibers under different launch conditions based on a commercially available RDTS system. By using the GI-MMF under the overfilled launch condition, a 1℃ temperature resolution was achieved with a spatial resolution degradation of 0.13 m at the distance of 25 km. The spatial resolution degradation using the standard MMF is 1.58 m in comparison. Moreover, the RDTS using the proposed GI-MMF under the single mode launch condition achieved a temperature resolution of 4.7℃ temperature resolution at the distance of 25 km with a 2.2℃ improvement and no degradation on spatial resolution compared with that using the standard SMF. |
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