Patent EP0514722B1 successfully refreshed from Google Patents.
EP0514722B1
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EP
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Multifiber optical connector plug with low reflection and low insertion loss
Assignee: NTT Inc
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Filing: 1992-05-08
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Granted: 1997-03-05
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Expires: 2012-05-08
Abstract
No abstract record available.
Inventors
- 👤 Shinji Nagasawa
- 👤 Fumihiro Ashiya
- 👤 Toshiaki Satake
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 17:16
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/381; G02B6/3818; G02B6/3822; G02B6/3821; G02B6/3825; G02B6/3873; G02B6/3885; G02B6/389; G02B6/3833; G02B6/3854; G02B6/3863
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
192 words
A multifiber optical connector plug, comprising: a plurality of optical fibers (102, 102'); and a connector plug member (116, 116', 116A) having a connecting facet (117, 117') and guide pin insertion holes (104, 104') located on the connecting facet (117, 117') for receiving guide pins for aligning the multifiber optical connector plug with another multifiber optical connector plug, where the endfaces of the optical fibers (102, 102') to be connected with other optical fibers are arranged between the guide pin insertion holes (104, 104') along a transverse direction; characterized in that the connector plug member (116, 116', 116A) is made of an elastic material; the connecting facet (117, 117') has a convex ellipsoidal surface shape; and the connecting facet (117, 117') and the endfaces of the optical fibers (102, 102') are inclined with respect to a plane perpendicular to the axial direction of the optical fibers (102, 102') by an angle (θ) which is larger than the critical acceptance angle of the optical fibers (102, 102'), so that a beam propagating in the fiber and reflected at the inclined endface of that fiber is not transmitted toward the source of that beam.
Claim 2
Dependent Claim
60 words
The multifiber optical connector plug of claim 1, wherein the convex ellipsoidal surface shape of the connecting facet (117, 117') has the largest radius of curvature in the transverse direction at a center of the connecting facet and the smallest radius of curvature in a direction perpendicular to the transverse direction at the center of the connecting facet (117, 117').
Claim 3
Dependent Claim
68 words
The multifiber optical connector plug of claim 1 or 2, wherein the convex ellipsoidal surface shape of the connecting facet has a transverse radius of curvature R1, wherein 0 < R1 < ∞, in a transverse direction at a center of the connecting facet and a longitudinal radius of curvature R2, wherein 0 < R2 < ∞, in a longitudinal direction at the center of the connecting facet.
Claim 4
Dependent Claim
32 words
The multifiber optical connector plug of claim 1, wherein the material from which the connector plug member is made is an elastic material having a Young's modulus not greater than 30 GPa.
Claim 5
Dependent Claim
80 words
The multifiber optical connector plug of claim 4, further comprising spring means for pressing the multifiber optical connector plug toward another multifiber optical connector plug in the axial direction in a state in which the multifiber optical connector plug is connected with said another multifiber optical connector plug, such that an elliptical contact region surrounding the optical fibers is formed on the connecting facet by an elastic deformation of the elastic material from which the connector plug member is made.
Claim 6
Dependent Claim
28 words
The multifiber optical connector plug of any of claims 1 to 5, wherein the endfaces of the optical fibers (102) are projecting out of the connecting facet (117).
Claim 7
Dependent Claim
43 words
The multifiber optical connector plug of claim 6, wherein the endfaces of the optical fibers (102) are projecting out of the connecting facet (117) by a length (ΔL) which is significantly shorter than an outer diameter of each of the optical fibers (102).
References Cited (Backward Citations)
No citation records indexed.
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