Patent ID: 7494286
Filing Date: 2009-02-24
Classification: G02B,G02F,H01S

Abstract:
1. A laser module, comprising: a sub-mount; a semiconductor laser secured to a surface of the sub-mount; and an optical waveguide device joined to the surface of the sub-mount by an adhesive layer so that the optical waveguide device is coupled optically with the semiconductor laser, wherein a first groove is formed at the surface of the sub-mount at a region corresponding to an incident end side of the optical waveguide device, the first groove being formed parallel to an outgoing end face of the semiconductor laser with a predetermined space therefrom, and wherein a second groove is formed at the surface of the sub-mount at a region corresponding to the incident end side of the optical waveguide device, the second groove being formed parallel to the first groove and being positioned between the first groove and the outgoing end face of the optical waveguide device, wherein a distance L the adhesive layer is formed as a single layer provided under the optical waveguide device ranging from a surface of the sub-mount to the inside of the first groove, so that an end portion of the adhesive layer on the incident end side of the optical waveguide device is positioned inside the first groove so as to adhere to a surface of a wall of the first groove under the optical waveguide device and does not contact with the outgoing end face of the semiconductor laser.