公开(公告)号：JPH09159880A

公开(公告)日：1997-06-20

申请号：JP32765595

申请日：1995-12-15

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： MIN KIYU SON ,  SON GU KAN ,  HE TE RII ,  NAMU WAN ,  SON SU PAAKU ,  DON GU KIMU

IPC: G02B6/32 ,  B23K26/064 ,  B23K26/21 ,  G02B6/42 ,  H01S5/00 ,  B23K26/00 ,  B23K26/06 ,  H01S3/18

Abstract: PROBLEM TO BE SOLVED: To precisely fix a light focusing lens used for a semiconductor laser module for light transmission and optical amplification provided with optical fibers by utilizing a laser welding method. SOLUTION: The light focusing lens 5 is first fixed by adjusting the distance between this lens and the optical fibers and, thereafter, the position between a laser diode 1 and the light focusing lens 5 is aligned in a transverse direction and longitudinal direction. Next, a lens housing is welded to a lens ring by a laser. The position between the laser diode 1 and the light focusing lens 5 is so aligned in the transverse direction and the longitudinal direction that the magnitude of the light signal outputted to the optical fibers is maximized. A lens fixing base 8 and the lens ring are then welded to each other by the laser. Not only the productivity is enhanced but the displacement between the parts is minimized even at a temp. change after welding or in a reliability test according to thereto and, therefore, the performance of the optical module is improved.