Patent ID: 8873911

Claim:
A method to assemble an optical module with a pig-tailed fiber, comprising steps of: (a) welding an auxiliary holder to a housing of the optical module by a YAG laser beam, the auxiliary holder covering a window holder that supports a window to pass light for coupling the pig-tailed fiber optically with an optical device installed in the housing; (b) welding a ferrule that terminates the pig-tailed fiber with a ferrule holder by the YAG laser beam; (c) aligning the pig-tailed fiber with the optical device by sliding the ferrule holder on the auxiliary holder to attain optical coupling efficiency between the optical device and the pig-tailed fiber; (d) welding the ferrule holder with the auxiliary holder by the YAG laser beam; and (e′) welding the auxiliary holder with the window holder to recover the optical coupling efficiency degraded in step (d).