| 摘要 |
PROBLEM TO BE SOLVED: To provide reinforcing members for an optical fiber welded part having high mechanical strength to improve reliability while maintaining the advantage that the mass production of crystallized glass of low thermal expansion is easy. SOLUTION: The reinforcing members 13 and 14 for the optical fiber welded part are composed of the crystallized glass of low thermal expansion to an approximately planar or bar form and have surface layers in precipitation ofβ-quartz solid solution crystals or the surface layers in precipitation ofβ-spodumene crystals on surfaces 13a, 13b, 14a and 14b which face the optical fibers having the welded part and are approximately parallel thereto. |
