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Proceedings Paper

Multi-core photonic crystal fibers for high-power laser
Author(s): Laurent Michaille; Charlotte R. Bennett; David M. Taylor; Terence J. Shepherd
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Paper Abstract

In this paper, we show that it is possible to arrange for an 18-core photonic crystal fibre (PCF) laser to operate in the fundamental in-phase supermode. The mode divergence is as small as 12.5 mrad. The equivalent mode field diameter is about 52 μm. Mode filtering is provided by a pinhole in the far field. The laser is Q-switched using an Acousto-Optic Modulator (AOM). An output power up to 65 W at a repetition rate of 50 kHz (corresponding to 1.3 mJ per pulse), with 22 ns short pulses, has been obtained with a slope efficiency of 46%. Ongoing amplification experiments are briefly described. Limiting factors (end facet damage threshold and thermal dissipation) are discussed for further scaling of this laser concept.

Paper Details

Date Published: 23 February 2006
PDF: 9 pages
Proc. SPIE 6102, Fiber Lasers III: Technology, Systems, and Applications, 61020W (23 February 2006); doi: 10.1117/12.657885
Show Author Affiliations
Laurent Michaille, QinetiQ (United Kingdom)
Charlotte R. Bennett, QinetiQ (United Kingdom)
David M. Taylor, QinetiQ (United Kingdom)
Terence J. Shepherd, QinetiQ (United Kingdom)

Published in SPIE Proceedings Vol. 6102:
Fiber Lasers III: Technology, Systems, and Applications
Andrew J. W. Brown; Johan Nilsson; Donald J. Harter; Andreas Tünnermann, Editor(s)

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