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Abstract
Gas-filled capillary discharge waveguides are a commonly employed medium in laser–plasma interaction applications, such as the laser wakefield accelerator, because they can simultaneously guide high-power laser pulses while acting as the medium for acceleration. In this paper, the production of both straight and linearly tapered capillaries using a femtosecond laser micromachining technique is presented. A tapered capillary is shown to possess a smooth variation in diameter (from 305 μm to 183 μm) along its entire 40 mm length, which would lead to a longitudinal plasma density gradient, thereby dramatically improving the laser–plasma interaction efficiency in applications. Efficient guiding with up to 82% energy transmission of the fundamental Gaussian mode of a low intensity, 50 fs duration laser pulse is shown for both types of capillary waveguide.
Original language | English |
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Pages (from-to) | 355-361 |
Number of pages | 6 |
Journal | Journal of Plasma Physics |
Volume | 78 |
Issue number | special issue 4 |
Early online date | 2 Feb 2012 |
DOIs | |
Publication status | Published - 2012 |
Keywords
- straight
- linearly tapered
- capilliaries
- femtosecond laser
- micromachining
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Dive into the research topics of 'Straight and linearly tapered capillaries produced by femtosecond laser micromachining'. Together they form a unique fingerprint.Projects
- 2 Finished
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LaserLab Europe - The Integrated Initiative of European Laser Research Infrastructures II (FP7 Research Infrastructures)
Jaroszynski, D. (Principal Investigator)
European Commission - FP7 - General
1/03/09 → 31/05/12
Project: Research
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HARNESSING LASER-DRIVEN PLASMA WAVES AS PARTICLE AND RADIATION SOURCES
Jaroszynski, D. (Principal Investigator), Bingham, R. (Co-investigator), Ledingham, K. (Co-investigator) & McKenna, P. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/03/07 → 31/08/11
Project: Research