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Optimised chirped fibre Bragg gratings for detonation velocity measurements

Optimised chirped fibre Bragg gratings for detonation velocity measurements
Optimised chirped fibre Bragg gratings for detonation velocity measurements

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.

Chirped gratings, Detonation, Fibre Bragg gratings, Fibre sensing, Velocity sensing
1424-8220
1-15
Pooley, Josh
788d06b3-b7fd-4741-a2fe-c46f218ffeb1
Price, Ed
d7c2e2e5-b6ef-4cf8-b4c1-de2072647f54
Ferguson, James W.
895c1002-9e99-4320-8ec9-ec5c9bffecff
Ibsen, Morten
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Pooley, Josh
788d06b3-b7fd-4741-a2fe-c46f218ffeb1
Price, Ed
d7c2e2e5-b6ef-4cf8-b4c1-de2072647f54
Ferguson, James W.
895c1002-9e99-4320-8ec9-ec5c9bffecff
Ibsen, Morten
22e58138-5ce9-4bed-87e1-735c91f8f3b9

Pooley, Josh, Price, Ed, Ferguson, James W. and Ibsen, Morten (2019) Optimised chirped fibre Bragg gratings for detonation velocity measurements. Sensors, 19 (15), 1-15. (doi:10.3390/s19153333).

Record type: Article

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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More information

Accepted/In Press date: 23 July 2019
e-pub ahead of print date: 29 July 2019
Published date: 1 August 2019
Keywords: Chirped gratings, Detonation, Fibre Bragg gratings, Fibre sensing, Velocity sensing

Identifiers

Local EPrints ID: 433465
URI: https://eprints.soton.ac.uk/id/eprint/433465
ISSN: 1424-8220
PURE UUID: 8171fb30-5383-4369-aaed-2c4a1e901a91

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Date deposited: 23 Aug 2019 16:30
Last modified: 21 Oct 2019 16:31

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Contributors

Author: Josh Pooley
Author: Ed Price
Author: James W. Ferguson
Author: Morten Ibsen

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