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Note: femtosecond laser micromachining of straight and linearly tapered capillary discharge waveguides

Wiggins, Mark and Reijnders, Merijn and Abu-Azoum, Salima Saleh and Hart, Kerri and Welsh, Gregor H. and Issac, Riju and Jones, David and Jaroszynski, Dino (2011) Note: femtosecond laser micromachining of straight and linearly tapered capillary discharge waveguides. Review of Scientific Instruments, 82 (9). ISSN 0034-6748

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Abstract

Gas-filled capillary discharge waveguides are important structures in laser-plasma interaction applications, such as the laser wakefield accelerator. We present the methodology for applying femtosecond laser micromachining in the production of capillary channels (typically 200–300 μm in diameter and 30–40 mm in length), including the formalism for capillaries with a linearly tapered diameter. The latter is demonstrated to possess a smooth variation in diameter along the length of the capillary (tunable with the micromachining trajectories). This would lead to a longitudinal plasma density gradient in the waveguide that may dramatically improve the laser-plasma interaction efficiency in applications.

Item type: Article
ID code: 40778
Keywords: high speed optical techniques, laser beam machining, plasma density, optical waveguides, Physics, Instrumentation
Subjects: Science > Physics
Department: Faculty of Science > Physics
Technology and Innovation Centre > Advanced Science and Technology
Depositing user: Pure Administrator
Date Deposited: 08 Aug 2012 12:47
Last modified: 26 Mar 2015 18:42
URI: http://strathprints.strath.ac.uk/id/eprint/40778

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