A new demodulation method of fiber Bragg grating (FBG) sensing signal, which is by making use of the monotonic decline section of an amplified spontaneous emission (ASE) light source, is proposed.

提出一种利用放大的自发辐射(ase)光源的单调下降边带对光栅光纤传感器进行解调的新方法。

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Aiming at the deep hole detection, the method of ring light section is introduced and its principle is analyzed.

针对深孔内膛的检测，对环形光切的测量方法进行了介绍，对其测量原理进行了分析。

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By using the light ray vector method, the elliptic-section cylinder lenses have been designed to collimate the semiconductor laser beam.

采用光线矢量法设计了两个相互垂直的椭圆截面柱透镜组来准直半导体激光束。

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