Connector ferrule for connecting optical fibers

A ferrule comprising:

• a block-shaped body having a front facet and a rear facet;
• two pin holes provided on said front facet, the two pin holes extending in a front-to-rear direction in said body for individually allowing a guide pin to be inserted thereinto;
• a fiber hole array having multiple fiber holes provided between the two pin holes on said front facet, extending in the front-to-rear direction in said body, for individually allowing an optical fiber to be inserted thereinto and passed therethrough, the multiple fiber holes forming a row of the multiple fiber holes in a direction virtually in parallel with a direction of a line connecting centers of said two pin holes with each other, the multiple fiber holes forming multiple stages of these rows in a direction virtually perpendicular to the direction of the line connecting the centers of said two pin holes with each other;
• an introduction opening formed on said rear facet, for introducing optical fibers;
• a cavity extending from said introduction opening to inner ends of said multiple fiber holes in the front-to-rear direction of said body, for storing a part of said optical fibers;
• guide grooves formed so as to communicate to said inner ends of said fiber holes in said cavity, for guiding the insertion of said optical fibers into said fiber holes;
• an adhesive filler opening formed on a side surface of said body, for filling the inside of the body with an adhesive;
• and
• a filler pit extending from said adhesive filler opening to the inside of said body to communicate to said cavity, for positioning said the ends of said guide grooves in a range of said adhesive filler opening while said adhesive filler opening is viewed as the upper side.

A ferrule comprising:

• a block-shaped body having a front facet and a rear facet;
• a pair of pin holes provided in said body, the pin holes extending in a front-to-rear direction in said body for individually allowing a guide pin to be inserted thereinto;
• a fiber hole array having multiple fiber holes provided between said pair of pin holes in said body, each of the holes having an opening on one end on the front facet of said body, for individually allowing an optical fiber to be inserted thereinto and passed therethrough, the multiple fiber holes being vertically piled up to form stages;
• a cavity extending from an introduction opening formed on the rear facet of said body toward the inside of said body, the cavity communicating to the other ends of said multiple fiber holes in said body, for allowing said optical fibers to be inserted thereinto through said introduction opening;
• and
• guide grooves formed so as to communicate to said other ends of said fiber holes in said cavity, for guiding the insertion of said optical fibers into said fiber holes.

A ferrule comprising:

• a block-shaped body having a front facet and a rear facet;
• a pair of pin holes provided in said body, the pin holes extending in a front-to-rear direction in said body for individually allowing a guide pin to be inserted thereinto;
• a fiber hole array having multiple fiber holes provided between said pair of pin holes in said body, each of the holes having an opening on one end on the front facet of said body, for individually allowing an optical fiber to be inserted thereinto and passed therethrough, the multiple fiber holes having an overall length set to a range from ⅛ to ¾ of an overall length of said body, the multiple fiber holes being vertically piled up to form stages;
• a cavity extending from an introduction opening formed on the rear facet of said body toward the inside of said body, the cavity communicating to the other ends of said multiple fiber holes in said body, for allowing said optical fibers to be inserted thereinto through said introduction opening;
• and
• a guide groove array having guide grooves formed so as to communicate to said other ends of said fiber holes in said cavity, for guiding the insertion of said optical fibers into said fiber holes, the guide grooves forming stages along with said fiber holes.