Ngk Insulators, Inc.

Makoto Oomori

Takashi Yoshino

Yoshimasa Kondo

Kenji Kato

A method for producing an optical waveguide by irradiating a laser beam onto an oxide single crystal material includes a means by which the scattering of light from the surface of the waveguide may be prevented when light is transmitted through the waveguide. A laser beam is irradiated onto an oxide single crystal to from an optical waveguide portion defined by laser working faces, which are then subjected to a wet etching process using, for example, a strong alkaline solution.

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Nagoya, Japan

Makoto Oomori