1. The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
2. Development Bureau, Hamamatsu Photonics K.K., 1820 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
3. Advanced Material Engineering Div., TOYOTA Motor Corporation, 1200 Mishuku, Susono 410-1193, Japan
4. TOYOTA Central Research and Development Laboratories, Inc., 41-1 Yokomichi, Nagakute-cho, Aichi 480-1192, Japan