1. Laboratory of Applied Mathemetics, Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
2. Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
3. Instituto de Investigaciones Energéticas y Aplicaciones Industriales (INEI), Universidad de Castilla-La Mancha, Ciudad Real, 13071, Spain