Substrate having V-shaped grooves and a manufacturing method therefor, and optical fiber array

摘要

To provide a substrate having V-shaped grooves including: a V-groove portion having a plurality of V-grooves; a flat portion; and a stepped portion connecting the V-groove portion to the flat portion. The stepped portion is formed so as to be curved convexly toward the surface thereof. There is also provided an optical fiber array including: the substrate having V-shaped grooves; and a fiber holding substrate for holding at least fibers inserted and arranged in the V-grooves in the substrate having V-shaped grooves. A stress concentration on the fiber can be prevented and the stress can be decreased as a whole.