基于REC技术的激光器阵列传感系统设计

分析并提出了基于重构等效啾啁（REC）技术激光器阵列的传感系统和解调算法。REC工艺满足激光器阵列的低成本大量生产，并具备小体积的优势，在未来传感领域中有较大的实用价值。提出了一种激光器扫描的高效算法用来测量光纤布拉格光栅（FBG）因外界应力而产生的位移量。系统的独特性在于阵列激光器通道仅需调谐0.4 nm采样数据，取代了扫描FBG主功率峰，并且算法在FBG的任意谱段均适用，可以用于多通道波峰复用的FBG传感网络中。在单通道和四通道的实验中对FBG反射谱的位移进行精确定位，初步实验证明了该系统和算法的有效性和可行性。算法得出单通道中心波长与实际中心波长误差均在5 pm以下，四通道可以到达在2 pm以下，应力与算法结果中心波长呈现很好的线性度。对今后多通道激光阵列传感具有一定参考价值。

Design of laser array based on REC technology

The sensing system and demodulation algorithm of laser array based on REC technology were analyzed and put forward. REC process met the low-cost mass production of laser array, and had the advantages of small size, and a greater practical value in the field of sensing in future. An efficient algorithm for laser scanning was proposed to measure the displacement of fiber Bragg grating (FBG) due to external stress. The system was unique in that accurate demodulation can be achieved by scanning only 0.4 nm bandwidth FBG spectrum instead of relying on scanning FBG main power peak and the algorithm can be applied in any FBG band, which enable using of wavelength-division multiplexing(WDM) for FBG sensing network. In the experiment, the single-channel and four-channel can accurately search the displacement of FBG reflection spectrum. Preliminary experiments demonstrate the effectiveness and feasibility of the proposed method, results show that the error of single-channel is less than 5 pm, four-channel's is below 2 pm, stress and algorithm results show good linearity. It has certain reference value for the multi-channel laser array sensing.