1. J. Nilsson, J.K. Sahu, Y.J. Jeong, W.A. Clarkson, R. Selvas, A. Grudinin, S. Alam, High power fiber lasers: new developments, in: L.N. Durvasula (Ed.), Advances in Fiber Lasers, Proceedings of SPIE 4974, 2003, p. 50.
2. A. Liem, J. Limpert, H. Zellmer, A. Tunnermann, V. Reichel, K. Morl, S. Jetschke, S. Unger, H.R. Muller, J. Kirchof, T. Sandrock, A. Harschak, 1.3kW Yb-doped fiber laser with excellent beam quality, in: OSA Trends in Optics and Photonics Series (TOPS) vol. 96 Conf. Lasers and Electro-Optics (CLEO), Technical Digest. Postdeadline paper CPDD2, Optical Society of America, Washington, DC, 2004.
3. Ytterbium-doped large-core fiber laser with 1.36 kW continuous-wave output power
4. A 103 W erbium–ytterbium co-doped large-core fiber laser
5. Press release, IPG Photonics Corporation, March 25 2003 (www.ipgphotonics.com/pr_3252003/news_detail.htm).