| 摘要 |
PROBLEM TO BE SOLVED: To prevent a characteristic such as an insertion loss, etc., of light from deteriorating even when a heat shock or a heat cycle is applied in a wide temp. range. SOLUTION: An optical transmission member fixing device is provided with a substrate 17 provided with a housing groove 9 housing a core wire 8 and a cap 15 integrated with the substrate 17. A housing space 39 housing at least a coating part of an optical transmission member is provided between the substrate and the cap. The size of the housing space is larger than the size of the housing groove in viewing in the width direction of the optical transmission member. An adhesives 20 for fixing the core wire is filled up to the surround of the core wire 8 in the housing groove 9. The adhesives 21, 22 for fixing the optical transmission member is filled up to the surround of the optical transmission member in the housing space 39. The thickness of the adhesive surrounding the optical transmission member 8 in a boundary area 27 between the housing space 39 and the housing groove 9 is reduced continuously toward the housing groove 9 at least in the vicinity of the opening 9a of the end of the housing groove 9. |
