Distributed feedback (DFB) phosphate glass fiber lasers that are cladding pumped with multimode diodes have been demonstrated. Single and cascaded DFB lasers with outputs up to 160 mW and 1 W, respectively, have been achieved.

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Conference Conference on Lasers and Electro-Optics, CLEO 2008
Citation
Li, L., Schülzgen, A., Temyanko, V.L., Spiegelberg, C. (Ch), Nguyen, D.T., Zhu, X., … Peyghambarian, N. (2008). Cladding-pumped distributed feedback phosphate glass fiber lasers. Presented at the Conference on Lasers and Electro-Optics, CLEO 2008.