In this Letter, a low-cost interrogation technique for multiple fiber Bragg gratings (FBGs) is demonstrated. The design utilizes the major advantage of the distributed feedback lasers, which is tuning their emitted wavelength by current modulation and temperature variation. The sensitivity of this method and the influence of optical losses on the measurement have been carefully studied, and an accuracy of 5 pm is achieved.

中文翻译：

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用于静态应用的低成本多重FBG询问技术。

在这封信中，展示了一种用于多光纤布拉格光栅（FBG）的低成本询问技术。该设计利用了分布式反馈激光器的主要优点，即通过电流调制和温度变化来调整其发射波长。已经仔细研究了该方法的灵敏度以及光损耗对测量的影响，并获得了5 pm的精度。