Fast and reliable interrogation of USFBG sensors based on MG-Y laser discrete wavelength channels
Fast and reliable interrogation of USFBG sensors based on MG-Y laser discrete wavelength channels
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DOI：
10.1016/j.optcom.2016.07.069
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发表时间：
2017
影响因子：
2.4
通讯作者：
J. Rohollahnejad;L. Xia;Rui Cheng;Yanli Ran;Lei Su
中科院分区：
文献类型：
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作者：
J. Rohollahnejad;L. Xia;Rui Cheng;Yanli Ran;Lei Su
在这封信中，我们提出了利用单片MG-Y激光器的离散波长通道来解调具有宽高斯谱的超短光纤Bragg光栅。利用MG-Y激光器的波长通道对超小型光纤陀螺的宽带高斯谱进行采样，并将其作为频谱的中心。这种测量继承了常见的可调谐激光询问技术的重要特征，即相对于常见的基于强度的方法，它具有高度的灵活性，对强度变化自然不敏感。而传统的可调谐激光方法需要扫描整个光谱才能获得光谱的中心波长，而本文提出的方案只需要采集几个离散的激光波长通道，大大提高了测量效率和速度。这一可靠、低成本的概念为超宽带光纤陀螺在大规模分布式测量中的应用，特别是在时域多路传输方案中的应用奠定了良好的基础。
In this letter, we propose to use discrete wavelength channels of a single chip MG-Y laser to interrogate an ultra-short fiber Bragg grating with a wide Gaussian spectrum. The broadband Gaussian spectrum of USFBG is sampled by the wavelength channels of MG-Y laser, through which the center of the spectrum. The measurement inherits the important features of a common tunable laser interrogation technique, namely its high flexibility, natural insensitivity to intensity variations relative to common intensity-based approaches. While for traditional tunable laser methods, it requires to sweep the whole spectrum to obtain the center wavelength of the spectrum, for the proposed scheme, just a few discrete wavelength channels of laser are needed to be acquired, which leads to significant improvements of the efficiency and measurement speed. This reliable and low cost concept could offer the good foundation for USFBGs future applications in large scale distributed measurements, especially in time domain multiplexing scheme.