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Updated: Jan 21, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
Optimised Chirped Fibre Bragg Gratings for Detonation Velocity Measurements
Josh Pooley1, Ed Price2, James W Ferguson2
1Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
Abstract:
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.
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