Optical transmitter/receiver apparatus, method for fabricating the same and optical semiconductor module

A method of manufacturing an optical semiconductor module which comprises:

• a base;
• a semiconductor laser device on the base, for emitting semiconductor laser light;
• and an optical fiber for transmitting the laser light emitted by the semiconductor laser device therethrough, the method comprising the steps of:
• forming a concave groove and an alignment mark in the base by the same etching process on the base;
• aligning a position of the semiconductor laser device with a position of the base using the alignment mark, and thereafter securing the semiconductor laser device to the base;
• and
• installing the optical fiber in the concave groove of the base;
• wherein the base further includes a cut recess extending in a direction vertical to an optical axis direction, and
• the alignment mark comprises:
• a pair of side alignment marks formed on both sides of a region of the base, to which region the semiconductor laser device is secured, so as to be symmetrically disposed with respect to the optical axis;
• and
• a base edge alignment mark formed on an edge portion of the wall of the cut recess of the base, the wall being closer to the semiconductor laser device.

A method of manufacturing an optical semiconductor module which comprises:

• a base;
• a semiconductor laser device on the base, for emitting semiconductor laser light;
• and an optical fiber for transmitting the laser light emitted by the semiconductor laser device therethrough, the method comprising the steps of:
• forming a concave groove and an alignment mark in the base by the same etching process on the base;
• aligning a position of the semiconductor laser device with a position of the base using the alignment mark, and thereafter securing the semiconductor laser device to the base;
• and
• installing the optical fiber in the concave groove of the base;
• wherein the position of the semiconductor laser device is aligned with the position of the base also using a laser edge alignment mark formed on an edge portion of a bottom surface of the semiconductor laser device, the edge portion of the bottom surface being closer to the optical fiber.