Ferrule, ferrule with optical fiber, and method of manufacturing ferrule with optical fiber

A ferrule that holds an end part of an optical fiber, the ferrule comprising:

• the optical fiber;
• and
• a fiber hole into which the optical fiber is inserted;
• an upper wall part and a lower wall part that define a hollow adhesive filling part, wherein
• the lower wall part faces the upper wall part;
• the upper wall part has an upper opening through which an adhesive passes into the adhesive filling part;
• and
• the lower wall part has a lower opening that ventilates the adhesive filling part to the outside of the ferrule, and
• wherein the optical fiber is inserted in the fiber hole and fixed to the ferrule with the adhesive applied between the upper wall part and the lower wall part from the upper opening.

A method of manufacturing a ferrule with an optical fiber comprising:

• preparing the ferrule that comprises:
• a fiber hole into which the optical fiber is inserted;
• an upper wall part and a lower wall part that define a hollow adhesive filling part, wherein
• the lower wall part faces the upper wall part;
• the upper wall part has an upper opening through which an adhesive passes into the adhesive filling part;
• and
• the lower wall part has a lower opening that ventilates the adhesive filling part to outside of the ferrule;
• inserting the optical fiber into the fiber hole;
• filling the adhesive in the adhesive filling part from the upper opening;
• applying the adhesive between the optical fiber and an inner wall surface of the adhesive filling part;
• and
• fixing the optical fiber to the ferrule with the adhesive.