Pooley Josh, Price Ed, Ferguson James W, Ibsen Morten
Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
AWE Aldermaston, Reading, Berkshire RG7 4PR, UK.
Sensors (Basel). 2019 Jul 29;19(15):3333. doi: 10.3390/s19153333.
Over the last decade, the use of chirped fibre Bragg gratings (CFBGs) in detonation velocity experiments has been steadily increasing. In this paper, we show how CFBG design parameters-chirp-rate, reflectivity and apodisation-affect linearity in detonation velocity tests. It is found that the optimal CFBG detonation velocity probe should have a high chirp-rate, a low reflectivity and no apodisation. As a further demonstration of these findings, we measure detonation velocity with a 24 cm optimised CFBG; the longest CFBG test of this kind so far.
在过去十年中，啁啾光纤布拉格光栅（CFBGs）在爆速实验中的应用一直在稳步增加。在本文中，我们展示了CFBG的设计参数——啁啾率、反射率和切趾——如何影响爆速测试中的线性度。研究发现，最佳的CFBG爆速探头应具有高啁啾率、低反射率且无切趾。作为这些发现的进一步证明，我们使用一个24厘米的优化CFBG测量了爆速；这是迄今为止此类最长的CFBG测试。
