Patent ID: 6805496
Filing Date: 2004-10-19
Classification: G02B

Abstract:
An optical communication module, comprising:a semiconductor laser, a lens to convert a beam emitted from said semiconductor laser, a wavelength selective filter of the beam as converted, and a light receiving device to receive the beam transmitted through the filter, wherein said filter is shaped in a pillar-shape and is provided with a plane of incidence and a plane of emission substantially in parallel to each other, and said filter is fixed on a substrate in such a manner as a central line of the pillar-shape is inclined by &agr; degrees that is larger than 0 degrees with regard to a central axis of said lens, and there is an angle &bgr; degrees above 0 degrees between the central line of the pillar-shape and of the plane of incidence, or between the central line of the pillar-shape and the plane of emission.