Coaxial transmitter optical subassembly (TOSA) with an optical fiber coupling receptacle

An optical transceiver module comprising:

• a transceiver housing;
• a plurality of coaxial transmitter optical subassemblies (TOSAs) located in said transceiver housing for transmitting optical signals at different channel wavelengths, each of said plurality of coaxial TOSAs comprising:
• a laser package having an optical coupling end and an electrical connecting end opposite said optical coupling end, said laser package further comprising a laser submount including conductive paths proximate said electrical connecting end for providing electrical connections, and a laser diode mounted on said laser submount and electrically connected to said conductive paths;
• and
• an optical fiber coupling receptacle extending from the laser package, the optical fiber coupling receptacle comprising:
• a housing having a first open end to receive a fiber-terminating ferrule at one end of an optical fiber;
• a fiber-coupling ferrule holding an optical fiber segment, said fiber-coupling ferrule being secured within said housing to optically couple said optical fiber segment to a laser of said TOSA through a second open end of said housing opposite said first open end;
• and
• a sleeve disposed on an interior surface of said housing to provide a sleeve cavity for securing said fiber-terminating ferrule and align said optical fiber to said optical fiber segment;
• and
• a z-ring coupled to said laser package, said z-ring defining a z-ring cavity, said z-ring cavity receiving at least a portion of said housing;
• and
• a multi-channel receiver optical subassembly (ROSA) located in said transceiver housing for receiving optical signals at different channel wavelengths.