Ferrule for optical fiber transmitting linearly polarized light and optical fiber connector using this ferrule
First Claim
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1. 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.
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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.
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Citations
17 Claims
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1. A ferrule for optical fibers transmitting linearly polarized light, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical fiber connector for optical fiber transmitting linearly polarized light, comprising:
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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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification