Receptacle-type optical transmission/reception apparatus

A receptacle-type optical transmission/reception apparatus comprising:

• a casing;
• a glass rod arranged in said casing and including a physical contact face contacted with an optical fiber ferrule;
• a receptacle arranged in said casing and configured to detachably hold said optical fiber ferrule in tight contact with said physical contact face of said glass rod;
• a semiconductor laser device arranged in said casing and configured to emit light through said glass rod;
• a photodetecting device arranged in said casing and configured to detect light incident through said glass rod;
• an optical branching device configured to guide the light emitted from said semiconductor laser device to said glass rod and to guide the light incident through said glass rod to said photodetecting device;
• and
• an incident light imaging optical system arranged in said casing and configured to form an image of the incident light on a photodetector, said imaging optical system having an optical axis shifted substantially in parallel from that of the incident light.

A receptacle-type optical transmission/reception apparatus comprising:

• a casing;
• a glass rod arranged in said casing and having a physical contact face to be contacted tightly with an optical fiber ferrule;
• a receptacle arranged in said casing to detachably hold said optical fiber ferrule in tight contact with said physical contact face of said glass rod;
• a semiconductor laser device arranged in said casing to emit light through said glass rod;
• a quarter wave plate arranged in said casing on an optical path of the light emitted from said semiconductor laser device.

A receptacle-type optical transmission/reception apparatus comprising:

• a casing;
• a glass rod arranged in said casing and having a physical contact face to be contacted tightly with an optical fiber ferrule;
• a semiconductor laser device arranged in said casing to emit light through said glass rod;
• and
• a marker formed on said physical contact face of said glass rod to position said semiconductor laser device.

A method of manufacturing a receptacle-type optical module having a casing, a glass rod arranged in said casing and including a physical contact face configured to contact tightly with an optical fiber ferrule, and a semiconductor laser device arranged in said casing and configured to emit light through said glass rod, comprising the steps of:

• causing said semiconductor laser device to emit light;
• picking up a spot image of the light from said semiconductor laser device on said physical contact face;
• detecting a positional shift of said semiconductor laser device from the desired position on the basis of a shift amount of said spot image from a central position of said physical contact face;
• and
• positioning said semiconductor laser device on the basis of information of the positional shift.