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 .