A semiconductor device for optically coupling a semiconductor light-emitting
device
to an optical fiber, includes (a) a lens which focuses lights emitted from the
semiconductor light-emitting device, onto the optical fiber, (b) a shell which
supports the lens therewith, the shell being comprised of a cylindrical first portion,
a second portion integral with the first portion at an upper end of the first portion
and being formed centrally with an opening into which the lens is to be fit, and
a cylindrical third portion extending from the first portion upwardly beyond the
second portion, (c) glass arranged around the lens for keeping the lens and the
opening hermetically sealed, and (d) a reinforcement formed on at least one of
upper and lower surfaces of the second portion for preventing the shell from being
deformed due to a stress acting on the shell.
