Patent ID: 7198411

Claim:
A manufacturing method of an optical communication module that optically couples at least one optical device and an optical transmitter, comprising: providing a tapered through-hole in a substrate, the tapered through-hole having a first end in a first side of the substrate and a second end in a second side of the substrate, the first end being smaller in diameter than the second end; housing a first optical device within the tapered through-hole between the first and second ends, the first optical device having an optical transmission point substantially coincident with a geometrical center of the tapered through-hole; and inserting an optical transmitter having a larger diameter than a diameter of the optical device in the tapered through-hole housing the optical device, thereby aligning a core of the optical transmitter with the geometrical center of the tapered through-hole, wherein providing the tapered through-hole comprises: irradiating the substrate with a femto-second pulse laser while relatively moving the femto-second pulse laser in an axial direction of the tapered through-hole; and removing a region of the substrate changed by the irradiation of the femto-second pulse laser so that the tapered through-hole emerges.