Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
AWE Aldermaston, Reading, Berkshire RG7 4PR, UK.
Sensors (Basel). 2019 Apr 10;19(7):1697. doi: 10.3390/s19071697.
In this paper, a simple detonation velocity measurement scheme is presented, which exploits the length-dependent amplified spontaneous emission (ASE) power emitted by off-the-shelf Er-doped fibres. This measurement scheme is first calibrated using cutback tests, so that minimal processing is required between data collection and velocity readout. We then demonstrate the use of this method in an explosive cylinder test and achieve a spatial resolution of approximately ±2 mm, owing to its implementation in a helical geometry. Alongside the standard Er fibres, a specially made, high-concentration Er/Yb-doped fibre is also calibrated, which demonstrates a potential spatial resolution approaching ±20 μ m.
本文提出了一种简单的爆轰波速度测量方案，该方案利用市售掺铒光纤的长度相关放大自发发射（ASE）功率。该测量方案首先通过截断测试进行校准，因此在数据采集和速度读取之间几乎不需要进行任何处理。然后，我们在爆炸筒测试中展示了该方法的应用，由于采用了螺旋几何形状，因此实现了约±2mm 的空间分辨率。除了标准的掺铒光纤之外，还对一种特殊制造的高浓度掺铒/镱光纤进行了校准，其空间分辨率可达到±20μm。
