Patent ID: 7387452
Filing Date: 2008-06-17
Classification: G02B,H01S

Abstract:
1. A semiconductor laser module comprising: a semiconductor laser for emitting a transmitted light; an optical fiber for optically coupling the transmitted light leaving the semiconductor laser and propagating inside; a coupling lens, which is a cylindrical lens connected by fusion with the edge face of the optical fiber and positioned on an optical path between the optical fiber and the semiconductor laser, consisting of a first GRIN lens portion, which has a numerical aperture larger than or equal to that of the semiconductor laser multiplied by 1.4 and parallelizes the incident transmitted light and is aligned at the semiconductor laser side, and a second GRIN lens portion, which has the same numerical aperture as the optical fiber and is positioned at the optical fiber side and optically couples the transmitted light passed through the first GRIN lens portion with the optical fiber; a lens mount piece for fixing to support at least one portion of the coupling lens or optical fiber so as to be capable of optically coupling the transmitted light leaving the semiconductor laser with the optical fiber via the coupling lens.