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Proceedings Paper

Spatial and spectral imaging of LMA photonic crystal fiber amplifiers
Author(s): Marko Laurila; Thomas T. Alkeskjold; Jesper Laegsgaard; Jes Broeng
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Paper Abstract

We demonstrate modal characterization using spatial and spectral resolved (S2) imaging, on an Ytterbium-doped large-mode-area photonic crystal fiber (PCF) amplifier and compare results with conventional cut-off methods. We apply numerical simulations and step-index fiber experiments to calibrate our mathematical and experimental routines of our S2 imaging system. We systematically analyze higher order mode (HOM) content of a polarizing 40μm core double-clad PCF amplifier with various launching and coiling configurations. We demonstrate a HOM suppression of more than -24dB with variance of 2.3dB.

Paper Details

Date Published: 10 February 2011
PDF: 9 pages
Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79142D (10 February 2011); doi: 10.1117/12.874564
Show Author Affiliations
Marko Laurila, Technical Univ. of Denmark (Denmark)
Thomas T. Alkeskjold, NKT Photonics A/S (Denmark)
Jesper Laegsgaard, Technical Univ. of Denmark (Denmark)
Jes Broeng, NKT Photonics A/S (Denmark)

Published in SPIE Proceedings Vol. 7914:
Fiber Lasers VIII: Technology, Systems, and Applications
Jay W. Dawson, Editor(s)

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