J. Jasapara, M. Andrejco, D. DiGiovanni, and R. Windeler, "Effect of heat and H2 gas on the photodarkening of Yb3+ fibers," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies 2006, Technical Digest (Optical Society of America, Washington, DC, 2006), CTuQ5.
A. V. Shubin, M. V. Yashkov, M. A. Melkumov, S. A. Smirnow, I. A. Bufetov, and E. M. Dianov, "Photodarkening of aluminosilicate and phosphosilicate Yb-doped fibers," in Conf. Digest of CLEO Europe-EQEC 2007, CJ3-1-THU.
J. Koponen, M. Söderlund, H. J. Hoffman, D. Kliner, and J. Koplow, "Photodarkening Measurements in Large-Mode-Area Fibers," in Fiber Lasers IV: Technology, Systems, and Applications, D. J. Harter,A. Tünnermann, J. Broeng, and C. Headley, eds., Proc. SPIE 6453, 64531E-1-11 (2007).
B. Morasse, S. Chatigny, E. Gagnon, C. Hovington, J.-P. Martin, and J.-P. De Sandro, "Low photodarkening single cladding ytterbium fibre amplifier," in Fiber Lasers IV: Technology, Systems, and Applications, D. J. Harter, A. Tünnermann, J. Broeng, and C. Headley, eds., Proc. SPIE 6453, 64530H-1-9 (2007).
J. Kirchhof, S. Unger, and A. Schwuchow, "Properties of Yb-doped materials for solid and microstructured high power fiber lasers," in Proceedings of ICMAT 2007 Symposium on Microstructured and Nanostructured Optical Fibers, Singapore, 1-6 July, 2007.