(2) K. Ueda, H. Sekiguchi, and H. Kan : “1kW CW output from fiber-embedded disk lasers”, Conference on Lasers and Electro-Optics 2002, Long Beach, postdeadline paper CPDC4 (2002-5)
(4) H. Sekiguchi, K. Ito, A. Tanaka, H. Yamaura, H. Kan, and K. Ueda : “1-kW Output Laser”, Rev. Laser Eng., Vol. 31, No. 8, pp. 525-529 (2003-8) (in Japanese)