| 摘要 |
PURPOSE:To improve a characteristic, to miniaturize an optical circuit element and to reduce a cost by fixing the optical circuit element to a groove, which is provided almost in the central part of a base material to be equipped with a through hole in a length-wise direction, inserting a spherical lens and optical fiber from the both sides of the through hole and fixing the spherical lens and optical fiber. CONSTITUTION:A groove 10b of prescribed width to almost vertically cut the through hole is provided in a base material 10 to have a through hole 10a, with which optical fiber 11 and 11' can be inserted without backlash. Then, a plate-shaped optical circuit element 12 as an optical isolator to have both function such as a Faraday rotator or a polarizer, etc., for example, is inserted and fixed to the groove 10b. Spherical lens 13 and 13' are inserted from the both edges of the through hole 10a and the optical fiber 13 and 13', whose end face is formed in a prescribed shape, are inserted from an outside. Then, the optical circuit element 12 is pressed from both surfaces through the spherical lens 11 and 11'. Accordingly, since the spherical lens 13 and 13' and the optical fiber 11 and 11' form an oblique surface to a light excepting for a contact point, the retuen quantity of a reflected light is reduced and a beam to be emitted from the optical fiber 11 and 11' is converged by the lens. Thus, the optical circuit element is made compact and the price is lowered. Then, the characteristic can be improved. |
