Patent ID: 9093812
Filing Date: 2015-07-28
Classification: G02B,H01S

Abstract:
1. A method of manufacturing a semiconductor laser module, the semiconductor laser module including: a laser diode array; an optical fiber array having optical fibers arranged on a substrate; a fiber array fitting for fixing the optical fiber array; a casing for supporting at least the laser diode array and the optical fiber array; and a support fitting for fixing the fiber array fitting and the casing, wherein the support fitting has a plane section parallel with the casing and two columnar sections extending vertically from right and left corners on an end surface on the laser diode array side on the plane section, wherein the fiber array fitting has a first contact section that is in line-contact or surface-contact with each of the two columnar sections of the support fitting, and the fiber array fitting and the support fitting are fixed to each other by a first laser welded section in the first contact section, and wherein the plane section of the support fitting has a second contact section that is in line-contact or surface-contact with the casing, and the support fitting and the casing are fixed to each other by a second laser welded section in the second contact section; the method further comprise the steps of: a first mating step of performing Xθ alignment by mating the fiber array fitting with the support fitting at the first contact section; a five-axis alignment step of performing five-axis alignment step of performing five-axis alignment of the optical fibers to the light emission surface of the laser diode array; a step of storing alignment coordinates being obtained in the first mating step and the five-axis alignment step; a moving step of moving the fiber array fitting by a predetermined distance in the positive direction of a Z axis; a moving-again step of moving the fiber array fitting to the stored alignment coordinates of the six axes again after the moving step; a second mating step of mating the fiber array fitting with the supporting fitting at the first contact section in the alignment coordinates of the six axes; and a laser welding step of forming the first laser welded section the second laser welded section in the first contact section and the second contact section.