Ferrule for optical fiber transmitting linearly polarized light and optical fiber connector using this ferrule
AssigneeNippon Telegraph and Telephone Corporation
InventorsRyo Nagase, Juichi Noda, Etsuji Sugita
Life of this patent
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Abstract
A ferrule for optical fibers transmitting linearly polarized light capable of preventing deterioration and fluctuation of the extinction ratio. The ferrule incorporates at least two paths connecting a region in a vicinity of an end of a puncture for an optical fiber inside the flange portion with outside of the ferrule. These paths effectively enable the removal of air in such a region which could have caused an extraneous stress on the optical fiber resulting in deterioration of the extinction ratio. An optical fiber connector using this ferrule is also disclosed.
Claims17
A ferrule for optical fibers transmitting linearly polarized light, comprising:
- an insertion portion having a puncture for an optical fiber;
- and
- a flange portion having an open end for receiving a coated optical fiber, having a tapering inner diameter between a part including the open end which has a smaller diameter and another part including another end to be attached to the insertion portion which has a larger diameter;
- said ferrule including at least two paths connecting a region in a vicinity of an end of the puncture inside the flange portion with the outside of the ferrule.
An optical fiber connector for optical fiber transmitting linearly polarized light, comprising:
- a pair of ferrules to be contacted with each other, each ferrule including:
- an insertion portion with an end face to be contacted and a puncture for an optical fiber reaching to an end face to be contacted;
- and
- a flange portion with an open end for receiving a coated optical fiber, having a tapering inner diameter between a part including the open end which has a smaller diameter and another part including another end to be attached to the insertion portion which has a larger diameter, said ferrule including at least two paths connecting a region in a vicinity of an end of the puncture inside the flange portion with the outside of the ferrule;
- a pair of plug housings for installing the pair of ferrules, each plug housing including a spring for pressing the ferrule installed along its central axis;
- and
- an alignment sleeve for receiving the insertion portions of the pair of ferrules such that the end faces of the pair of ferrules are contacted with each other.
Dependencies are inferred from the claim text.