Spatial and spectral imaging of LMA photonic crystal fiber amplifiers

Marko Laurila; Thomas T. Alkeskjold; Jesper Laegsgaard; Jes Broeng

doi:10.1117/12.874564

10 February 2011 Spatial and spectral imaging of LMA photonic crystal fiber amplifiers

Marko Laurila, Thomas T. Alkeskjold, Jesper Laegsgaard, Jes Broeng

Proceedings Volume 7914, Fiber Lasers VIII: Technology, Systems, and Applications; 79142D (2011) https://doi.org/10.1117/12.874564
Event: SPIE LASE, 2011, San Francisco, California, United States

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.

Citation Download Citation

Marko Laurila, Thomas T. Alkeskjold, Jesper Laegsgaard, and Jes Broeng "Spatial and spectral imaging of LMA photonic crystal fiber amplifiers", Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79142D (10 February 2011); https://doi.org/10.1117/12.874564

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