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Comptes Rendus Physique
Volume 7, n° 2
pages 170-176 (mars 2006)
Doi : 10.1016/j.crhy.2006.01.015
Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 μm
Source MOPA à fibre générant des impulsions brèves de faible largeur spectrale avec une énergie de lʼordre du millijoule et une forte puissance crête à 1,55 μm

Christophe Codemard , Carl Farrell, Pascal Dupriez, Valery Philippov 1, Jayanta K. Sahu, Johan Nilsson
Optoelectronic Research Centre, University of Southampton, Southampton SO17 1BJ, United Kingdom 

Corresponding author.

In the first part of this article we review the challenges associated with erbium-ytterbium doped fibre amplifiers and the design considerations to scale-up the output power and energy using cladding-pumped large-core fibre amplifiers in master-oscillator power-amplifier (MOPA) configuration. Previous results are also given to illustrate this rather successful approach. The second part consists of our latest experimental results with improvements in terms of linewidth and peak power using shorter pulses. Sub-hundred nanosecond pulses with millijoule energy and narrow linewidth were obtained using cascaded fibre amplifiers with large-core fibres. The energy level obtained with such short pulse duration and narrow spectral linewidth is the highest ever reported. System limitations and potential routes for further improvement are also discussed. To cite this article: C. Codemard et al., C. R. Physique 7 (2006).

The full text of this article is available in PDF format.

Dans la première partie de cet article, les difficultés associés à lʼutilisation dʼamplificateurs optiques à fibre dopée Er:Yb ainsi que les paramètres de conception pour augmenter la puissance et lʼénergie des pulses en utilisant des amplificateurs optiques à fibres à cœur larges, pompées par la gaine, en configuration master-oscillator power-amplifier (MOPA) sont revus. Cette approche est illustrée par des résultats obtenus précédemment par notre groupe. Dans la deuxième partie de lʼarticle les résultats les plus récents sont donnés avec une nette amélioration en ce qui concerne la largeur spectrale de la puissance crête des impulsions obtenues. Les limitations et les différentes techniques pour améliorer ces résultats sont aussi décrites. Pour citer cet article : C. Codemard et al., C. R. Physique 7 (2006).

The full text of this article is available in PDF format.

Keywords : MOPA, Doped fiber, Erbium, Ytterbium, Pulsed laser, High energy

Mots-clés : MOPA, Fibre dopée, Erbium, Ytterbium, Laser impulsionnel, Haute énergie

1  Permanent address: Leikki Corporation, Sorronrinne 9, 08500 Lohja, Finland.

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