OPTICAL DEVICE AND FORMATION OF OPTICAL WAVEGUIDE USING LIGHT-INDUCED EFFECT ON REFRACTIVE INDEX

摘要

The focused pulsed laser light 2 having a maximum power density of 10 ⁵ W / cm ² or more and a repeatability of 10 kHz or more is irradiated to the glass 1. The refractive index of the glass 1 irradiated with the laser beam 2 changes at the condensing point 4. While irradiating a laser beam to form a refractive index change region (i.e., an optical waveguide 5) having a predetermined pattern, the glass 1 moves continuously with respect to a focusing point of the pulsed laser beam 2, or The light is continuously scanned by the focused laser light 2. The glass 1 on which the optical waveguide 5 is to be formed may be any kind of glass having high transparency.