| 摘要 |
PROBLEM TO BE SOLVED: To realize stable optical coupling with little changeover time by making a core and a clad of glass materials and preventing defects to semiconductor laser beam. SOLUTION: An optical waveguide 11 is composed of the core 12 which is made of the glass material whose width or thickness is gradually varied in the propagation direction of light and the clad 13 which is made of the glass material to surround the core, and specified total reflection conditions are obtained by making the core 12 have a 1.60 to 1.65 refractive index and the clad 13 have a 1.45 to 1.55 refractive index, thus obtaining the optical waveguide 11 with superior characteristics which less reflects, scatters, and absorbs light. COPYRIGHT: (C)2004,JPO |
