光学
光纤布拉格光栅
外差探测
外差(诗歌)
材料科学
激光器
栅栏
光纤
光纤传感器
光纤激光器
节拍(声学)
信号(编程语言)
物理
计算机科学
声学
程序设计语言
出处
期刊:Optics Letters
[The Optical Society]
日期:2021-08-11
卷期号:46 (16): 3985-3985
被引量:4
摘要
The heterodyne detection technique is applied to a fiber Bragg grating (FBG)-based sensor. Specifically, a directly modulated distributed feedback laser array is used as a frequency scanning light source. Weak reflections from the FBG are recorded as a beat signal with a high signal-to-noise ratio using heterodyne detection. A reflection signal is clearly observed from the FBG with a reflectivity of 1% located at 60 km from the detection port.
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