Spatial and spectral imaging of LMA photonic crystal fiber amplifiers

Marko Laurila, Jesper Lægsgaard, Thomas Tanggaard Alkeskjold, Jes Broeng

Research output: Contribution to journalConference articleResearchpeer-review


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.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Pages (from-to)79142D
Publication statusPublished - 2011
EventFiber Lasers 8: Technology, Systems, and Applications - San Francisco, CA, United States
Duration: 24 Jan 201127 Jan 2011
Conference number: 8


ConferenceFiber Lasers 8
CountryUnited States
CitySan Francisco, CA

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