| 摘要 |
PURPOSE:To provide the optical fiber array which remains uniform in quality to a temp. change and to eliminates the coupling loss depending on the temp. change by constituting the optical fiber array of the same material as the material of an optical waveguide. CONSTITUTION:This optical fiber array is constituted by using the same material as the material of an optical waveguide element substrate as the array material. The array is formed by forming a V-grooved substrate A for the array and a holding plate for pressure contact by using LiNbO3, then adhering the V-grooved substrate fixed with optical fibers to a metallic base B by the holding plate for pressure contact in the case of use of, for example, an LiNbO3 substrate as the optical waveguide element substrate. The waveguide surface of the optical waveguide substrate D is then covered with an end face block C made of the LiNbO3 and is similarly adhered to the metallic base. The optical fibers and the optical waveguide are then aligned in accordance with the conventional method and the metallic bases are fused and fixed to each other by using a YAG laser beam. Alloys which are so composed and formulated as to have the same coefft. of thermal expansion as the coefft. of thermal expansion of the LiNbO3 are used for the metallic bases at this time. |
