IWLS Secretariat Akira Shirakawa Institute for Laser Science, University of Electro-Communications 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182-8585, Japan Phone : +81-42-443-5714 or 5711 Fax : +81-42-485-8960 E-mail : iwls@ils.uec.ac.jp