Patent ID: 7517158

Claim:
A method for manufacturing an optical module comprising an optical device and an optical receptacle, the optical device including a semiconductor laser diode to emit light and a lens for concentrating the light emitted from the laser diode, the optical receptacle including a stub with a coupling fiber in a center thereof, the stub accompanied with the coupling fiber providing a surface to receive the concentrated light from the lens, the surface being inclined with respect to an optical axis of the coupling fiber, the method comprising steps of: (a) determining a position of the optical receptacle where an optical coupling efficiency between the optical device and the stub becomes maximum; (b) varying a distance between the optical device and the coupling fiber; (c) deciding a direction of the light output from the lens in the optical device by iterating the steps (a) and (b); and (d) aligning a direction of the inclined surface of the stub with the direction of the light output from the optical device.