Patent ID: 8391657
Filing Date: 2013-03-05
Classification: G02B

Abstract:
1. An optical module comprising: a mounting substrate including an optical element and a waveguide having a core optically coupled to the optical element; an external waveguide substrate joined to said mounting substrate, said external waveguide substrate including an external waveguide having a core optically coupled to the waveguide of said mounting substrate; a first mating mechanism provided in one of said mounting substrate and said external waveguide substrate; and a joint including a second mating mechanism provided in another one of said mounting substrate and said external waveguide substrate; wherein, when said first mating mechanism and said second mating mechanism are mated, the core of the waveguide and the core of the external waveguide are aligned with each other, to generally maintain a direction of light transmission at said joint, said joint includes a flat surface outside of said second mating mechanism facing and contacting a portion of a top surface of said one of said mounting substrate and said external waveguide substrate, the portion of said top surface being an area outside of said first mating mechanism, said flat surface faces and covers one of an end portion of said waveguide and an end portion of said external waveguide, said joint is bonded to said one of said mounting substrate and said external waveguide substrate at least in a part of the portion of said top surface by adhesive, wherein an overlap area provided on said one of said mounting substrate and said external waveguide substrate that overlaps said joint is generally flush with one lengthwise side of the core of the waveguide or the external waveguide of said one of said mounting substrate and said external waveguide substrate, and said joint has a contact surface that contacts the overlap area, the contact surface being generally flush with one lengthwise side of the core of the waveguide or the external waveguide of said other one of said mounting substrate and said external waveguide substrate.