Wavelength-Division Multiplexed Interrogation of FBGs Using a Distributed-Feedback Laser Array
Wavelength-Division Multiplexed Interrogation of FBGs Using a Distributed-Feedback Laser Array
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使用分布式反馈激光阵列对 FBG 进行波分复用询问
DOI：
10.1109/lpt.2022.3168853
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发表时间：
2022
影响因子：
2.6
通讯作者：
Kuroda Keiji
中科院分区：
文献类型：
--
作者：
Yunfeng Lu;Marie Tabaru;Kuroda Keiji
报道了光纤布拉格光栅（FBG）的波分复用解调。直接调制的分布反馈激光器阵列被用作多波长、频率扫描的脉冲光源。利用外差探测技术提高微弱反射信号的信噪比。同时观察到三个不同峰值波长的光纤光栅的反射为拍频振荡。反射率为1%、间隔约1.5 m的三个光纤布拉格光栅可以清晰地看到反射光谱，信噪比约为20 dB。
Wavelength-division multiplexed interrogation of fiber Bragg gratings (FBGs) is reported. A directly modulated distributed-feedback laser array is used as a multi-wavelength, frequency scanning, pulsed-light source. A heterodyne detection technique is used to increase the signal-to-noise ratio of weak reflection signals. Reflections from three fiber Bragg gratings with different peak wavelengths are simultaneously observed as beat oscillations. Reflection spectra are clearly seen with a signal-to-noise ratio of approximately 20 dB from the three fiber Bragg gratings with a reflectivity of 1% and an interval of approximately 1.5 m.