Patent ID: 6744944
Filing Date: 2004-06-01
Classification: G02B

Abstract:
An optical coupling module comprising:at least one first optical fiber for receiving or outputting light, said optical fiber having a first end with a first end face; a plurality of second optical fibers for transmitting light to or receiving the light from said first optical fiber, said second optical fibers each having a second end with a second end face facing the first end face; an optical element inserted between the first end face and the second end faces and adapted to transmit the light between the first end face and the second end faces; a first ferrule made of a synthetic resin, for supporting the first end of said first optical fiber, said first ferrule including a first body with a first front end face and a first rear end face, and at least one first through hole formed in the first body, the first through hole extending between the first front and rear end faces and having a first front portion into which the first end of said first optical fiber is received, and a first rear portion being larger than the first front portion; and a second ferrule made of a synthetic resin, for supporting each of the second ends of said second optical fibers, said second ferrule including a second body with a second front end face and a second rear end face, and a plurality of second through holes formed in the second body, each of the second through holes extending between the second front and rear end faces and having a second front portion into which the second end of a corresponding one of said second optical fibers is received, and a second rear portion being larger than the second front portion, wherein said second through holes open in the second front end face at locations such that said second through holes are separated at respective distances from an optical axis of said first optical fiber, the distances being set depending on function of said optical element.