Patent ID: 7244069

Claim:
An optical module comprising: (a) a holder that houses an optical device selected from the group consisting of a light-emitting device and a photodetection device; (b) a condenser lens that is fixed in the interior of the holder and that optically couples an outside optical fiber and the optical device; (c) a receptacle that: (c1) is provided with a ferrule-holding hole for holding on a detachable basis a ferrule to which the outside optical fiber is fixed; (c2) is provided with a light-passing hole at its end portion; and (c3) is bonded with the holder at its end face in the direction of the axis; (d) a Faraday rotator that is fixed at one place selected from the group consisting of the inside of the light-passing hole of the receptacle and the end face of the receptacle; and (e) a permanent magnet for giving a flux density, B, to the Faraday rotator in the direction of the axis, wherein the receptacle is bonded with the holder so as to be displaced in a direction perpendicular to the axial line, so that an imaginary line connecting the lens and the Faraday rotator is slanted to the center line of the holder.