Nippon Telegraph and Telephone Public Corporation

Kunio Masuno

Takao Edahiro

Shiro Takahashi

Tadashi Miyashita

Masaharu Horiguchi

An eccentric core optical waveguide comprising at least one glass core having relatively large refraction index disposed in an outer cylindrical glass jacket having larger diameter than that of the glass core and relatively small refraction index. The one or more glass core being so arranged as to made tangential contact with the inner wall of the glass jacket or a dielectric thin film coated inside the jacket at a small area. The space between the glass core and the outer glass jacket or said thin film is filled by air.

Growing community of inventors

Mito, Japan

Kunio Masuno