A splice module for optically interconnecting ends of first and second
optical fibers (200, 300), each of which has a predetermined radius
(R.sub.f). The splice module comprises first and second plates (20, 30),
both of which are made of silicon. The first plate 20 is provided with
grooves (22). The second plate (30) is arranged on the first plate (20) to
cover the grooves (22) and to define passage ways (26) for receiving and
aligning the ends of the first and the second optical fibers (200, 300).
The passage way (26) has an inscribed circle (28), which has a radius
(R.sub.i) larger than the predetermined radius (R.sub.f) by a
predetermined difference (D) between 0.5 .mu.m and 1.0 .mu.m, both
inclusive.
