1. (1) Matsumoto K., Development of High Power Laser in the Japanese National Project, Proceeding of international Congress on Laser Advanced Materials Processing, SPIE Vol. 4831 (2002), pp. 90-95.
2. (2) Chryssolouris G., Laser Machining Theory and Practice, (1991), p. 220, Springer-Verlag.
3. (3) Miyazaki T., Miyazawa H., Murakami M. and Yoshioka T., Laser Machining Technology (in Japanese), (1991), p. 14, Sangyo-tosyo.
4. (4) Okamoto Y., Kataoka N., Tahara H., Shiwayama K. and Uno Y., Micro Cutting of Thin Copper Plate by Fiber Laser with Laval Nozzle, Journal of Laser Micro/Nanoengineering, Vol. 1, No. 3 (2006), pp. 243-246.