| 摘要 |
PURPOSE:To facilitate the assembly of the device by fitting and uniting a semiconductor laser directly on the opposite side of a transparent dielectric substrate from an optical waveguide. CONSTITUTION:The optical waveguide 12 is formed on the side of one main surface 11a of the dielectric base body 11, a semiconductor laser LD is fitted on the other main surface 11b, and the laser light Lb from the semiconductor laser LD is guided in the optical waveguide 12 through a curved holographic grating 13. Namely, a spread of the laser light Lb can be guided in the holographic grating 13 to wide area through the dielectric base body 11, so the holographic grating lens 13 is formed in such a shape that the wave front conversion of the laser light Lb is possible and the light can be guided as parallel light (a) to the optical waveguide 12. Therefore, the semiconductor laser LD can be fitted integrally and directly to the dielectric substrate 11. Consequently, the assembly is facilitated. |
