Patent ID: 7277613
Filing Date: 2007-10-02
Classification: G02B

Abstract:
1. An optical multiplexer/demultiplexer comprising: a first member on which a first optical waveguide and a second optical waveguide are formed so as to reach to an end face of the first member; a second member on which a third optical waveguide is formed so as to reach to an end face of the second member; and an optical filter provided between the end face of the first member and the end face of the second member, wherein the optical filter allows, among light components included in light transmitted through the first optical waveguide and outputted from the end face of the first member, a light component, which has been transmitted by the optical filter, to enter into the third optical waveguide from the end face of the second member, and a light component which has been reflected by the optical filter to enter into the second optical waveguide from the end face of the first member, or the optical filter allows, among light components included in light transmitted through the third optical waveguide and outputted from the end face of the second member, a light component, which has been transmitted by the optical filter, to enter into the first optical waveguide from the end face of the first member, and among light components included in light transmitted through the second optical waveguide and outputted from the end face of the first member, a light component which has been reflected by the optical filter to enter into the first optical waveguide from the end face of the first member, wherein the optical axis of the first optical waveguide at the end face of the first member and the optical axis of the third optical waveguide at the end face of the second member are parallel to each other but do not reside on an identical straight line.