Compact two wavelength Brillouin fiber laser sensor with double Brillouin frequency spacing
Compact two wavelength Brillouin fiber laser sensor with double Brillouin frequency spacing
复制标题
具有双布里渊频率间隔的紧凑型双波长布里渊光纤激光传感器
DOI：
10.1088/1054-660x/26/12/125106
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Yuncai Wang
中科院分区：
文献类型：
--
作者：
Li Liu;Mingjiang Zhang;Jianzhong Zhang;Hong Han;Xiaogang Yi;Jianguo Zhang;Yuncai Wang
提出并论证了一种紧凑型双布里渊频率间隔双波长布里渊光纤激光器(BFL)传感器。实验中采用20m的保偏光纤作为传感元件和布里渊增益介质。这种短腔结构不仅保证了两个斯托克斯波长的单纵模工作，而且在腔内没有掺铒光纤放大器的情况下，可以有效地降低BFL的外部扰动、复杂性和噪声。在实验中，泵浦与二阶斯托克斯波长之间的拍频灵敏度约为2 MHz/°C，与理论值基本一致。与传统结构相比，该结构具有更好的温度稳定性和 ±0.1dB的功率波动。该系统简单、稳定，便于更多的应用。
A compact two wavelength Brillouin fiber laser (BFL) sensor with double Brillouin frequency spacing is proposed and demonstrated. In the experiment, 20 m polarization maintaining fiber is used as the sensing element and Brillouin gain medium. This short cavity configuration not only guarantees single longitudinal mode operation of two Stokes wavelengths, but also can effectively reduce external perturbations, complexity and noise of BFL in the absence of an erbium-doped fiber amplifier in intra-cavity. In experiment, about 2 MHz/°C sensitivity of beat frequency between the pump and the 2nd-order Stokes wavelength keep in good agreement with the theoretical value. Meanwhile, 0.2 °C temperature stability and ±0.1 dB power fluctuation are better than the traditional structure. The system is simple and stable, making it convenient for more applications.