Optical apparatus, light emitting apparatus, optical cable, and method of connecting optical apparatus

A method for connecting a light emitting apparatus to a host apparatus, the method comprising:

• preparing the light emitting apparatus including a housing extending in a first direction, a light emitting device mounted in the housing, and an optical connector including a first optical connection part provided at one end of the housing, the optical connector being optically coupled to the light emitting device, and an electrical connector including a flat plate-shaped first electrical connection part provided at one end of the housing, the electrical connector being configured to receive a voltage to drive the light emitting device;
• preparing the host apparatus including a host optical connector including a second optical connection part configured to face the first optical connection part, a host electrical connector including a concave second electrical connection part configured to face the first electrical connection part and make the first electrical connection part enter therein, and a host board that mounts the host optical connector and the host electrical connector thereon;
• inserting, in a same axis direction, a plurality of guide pins provided on the host optical connector into a plurality of guide holes provided in the optical connector;
• causing the first electrical connection part to enter the second electrical connection part in the same axis direction;
• optically coupling the first optical connection part to the second optical connection part in the same axis direction;
• and
• electrically connecting the first electrical connection part to the second electrical connection part in the same axis direction.