Jointing holder for optical module for single-fiber bidirectional communication and optical module incorporating the jointing holder

A jointing holder for an optical module for single-fiber bidirectional communication, the jointing holder having a unitary structure comprising:

• (a) an optical fiber-fixing portion for securely holding an optical fiber for transmitting multiwavelength light bidirectionally;
• (b) a semiconductor laser-fixing portion for securely holding a semiconductor laser for emitting outgoing light;
• (c) a photodiode-fixing portion for securely holding a photodiode for receiving incoming light;
• (d) an optical path-forming space for optically coupling the optical fiber, the semiconductor laser and the photodiode;
• and
• (e) in the optical path-forming space, an optical filter-fixing face for securely holding an optical filter for separating multiplexed wavelengths, wherein:
• the optical filter-fixing face slants against the optical axis of the optical fiber;
• the semiconductor laser-fixing portion is formed by an inner face of a cylinder coaxial with the optical axis of the optical fiber such that the semiconductor laser can be aligned both by movement of the semiconductor laser in a direction of the optical axis and in a direction of rotation,
• the photodiode-fixing portion is adapted such that the photodiode is fixable at a place where the photodiode can receive light from the optical fiber wherein the light is bent at an angle of nearly 90° by the optical filter;
• and
• the optical axis of the optical fiber and the semiconductor laser are aligned with each other, and the photodiode is arranged to be perpendicular to the optical axis of the optical fiber.