An optical device module is provided which includes an optical device, an
optical fiber an end of which is optically coupled to the optical device,
a package containing the optical device and the optical fiber, and an
insertion tube fixed air-tightly through the wall of the package, the
optical fiber extending through the insertion tube out of the package,
wherein the end portion of the optical fiber is offset with respect to the
fixed portion, by the insertion tube, of the optical fiber to bend the
optical fiber between the end portion and the fixed portion of the optical
fiber, then avoiding the displacement of the end of the fiber to be
coupled to the optical device due to a change in environment temperatures
of the module, and minimize the temperature dependence of device
performance. Further, the optical device module may be fabricated such
that the end portion of the optical fiber is fixed to a ferrule which is
fixed to a ferrule holder which is capable to be deformed plastically,
whereby the optical axes of the optical device and the end of the optical
fiber can readily be adjusted accurately after assembly.
