Fiber optic connector and method

• US 20030142919A1
• Filed: 01/30/2002
• Published: 07/31/2003
• Est. Priority Date: 01/30/2002
• Status: Active Grant

• Current Assignee: Commscope Emea Limited (CommScope Holding Company, Inc.), CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: ADC Telecommunications Incorporated (TE Connectivity Limited)
• Inventors: Zimmel, Steven C.
• Granted Patent: US 6,916,120 B2
• Time in Patent Office: Days
• US Class Current: 385/78
• CPC Class Codes: G02B 6/3843 with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, e.g. measuring position or eccentricity testing the alignment of axes, including eccentricity, G01B11/27
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• CPC Class Codes: G02B 6/3871 Ferrule rotatable with respect to plug body, e.g. for setting rotational position adjusting fibre within the ferrule, G02B6/3843; Fixation of ferrules after rotation
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on

Abstract

A fiber optic connector including a ferrule surrounding an optical fiber and a hub engaging the ferrule. The hub includes a front portion having first and second opposing surfaces and first and second tapered regions extending from the first and second opposing surfaces to a front face. A housing includes an anti-rotation seat configured to engage the first and second opposing surfaces, the anti-rotation seat including parallel first and second contact lines positioned at a front of the anti-rotation seat. A spring within a chamber of the housing biases the ferrule through a bore in the front of the housing. The first tapered region of the hub engages the first contact line and the second tapered region engages the second contact line when the hub and ferrule are in a first rotational position so that the optical fiber is maintained at a known orientation with respect to the connector.

Claims

1. A fiber optic connector comprising:

an optical fiber;

a ferrule surrounding the optical fiber;

a hub retainably engaging the ferrule, wherein the hub includes a front portion having first and second opposing surfaces and first and second tapered regions extending from the first and second opposing surfaces to a front face of the hub at an angle with respect to a longitudinal axis of the connector;

a housing defining an anti-rotation seat configured to engage the first and second opposing surfaces of the front portion of the hub, the anti-rotation seat including parallel first and second contact lines positioned at a front of the anti-rotation seat adjacent a bore defined by the housing through which the ferrule extends; and

a spring disposed within a chamber defined by the housing and coupled to the anti-rotation seat, the spring biasing the ferrule through the bore of the housing;

wherein the first tapered region of the hub engages the first contact line and the second tapered region engages the second contact line when the hub and ferrule are in a first rotational position relative to the housing so that an end of the optical fiber is maintained at a known orientation with respect to the longitudinal axis of the connector.

2. The connector of claim 1, wherein the connector is tunable.

3. The connector of claim 2, wherein the first tapered region of the hub engages the second contact line and the second tapered region engages the first contact line when the hub and ferrule are in a second rotational position so that the end of the optical fiber is maintained at the known orientation with respect to the longitudinal axis of the connector.

4. The connector of claim 3, wherein the hub further comprises third and fourth opposing surfaces and third and fourth tapered regions extending from the third and fourth opposing surfaces to the front face of the hub at the angle.

5. The connector of claim 1, further comprising parallel third and fourth contact lines positioned at the front of the anti-rotation seat adjacent the bore defined by the housing, wherein the first tapered region of the hub engages the third contact line and the second tapered region engages the fourth contact line when the hub and ferrule are in a third rotational position and wherein the first tapered region of the hub engages the fourth contact line and the second tapered region engages the third contact line when the hub and ferrule are in a fourth rotational position.

6. The connector of claim 5, wherein the first rotational position is at a 45-degree angle with respect to the third rotational position and the second rotational position is at a 45-degree angle with respect to the fourth rotational position.

7. The connector of claim 1, wherein end faces of the ferrule and the optical fiber are angled with respect to the longitudinal axis of the connector.

8. A hub and ferrule assembly for a fiber optic connector, the assembly comprising:

a ferrule configured to surround an optical fiber; and

a hub retainably engaging the ferrule, wherein the hub includes a front portion having first and second opposing surfaces and first and second tapered regions extending from the first and second opposing surfaces to a front face of the hub at an angle with respect to a longitudinal axis extending through a center of the hub and ferrule assembly, wherein the first tapered region is positioned to engage a first contact line on the fiber optic connector and the second tapered region is positioned to engage a second contact line on the fiber optic connector.

9. A fiber optic connector housing comprising:

an exterior body configured to be received in a fiber optic adapter;

a cavity defined by a rear portion of the connector housing;

an anti-rotation seat coupled to the cavity, the anti-rotation seat including a plurality of longitudinally extending surfaces; and

first and second contact lines positioned at a front of the anti-rotation seat adjacent a bore;

the first and second contact lines being spaced apart on opposite sides of a longitudinal axis of the connector housing and parallel to each other.

10. A fiber optic connector comprising:

an optical fiber;

a ferrule surrounding the optical fiber;

a hub retainably engaging the ferrule, the hub including an anti-rotation portion;

a housing defining an anti-rotation seat configured to engage the anti-rotation portion of the hub;

a spring disposed within a chamber defined by the housing and coupled to the anti-rotation seat, the spring biasing the ferrule through the bore of the housing; and

an alignment arrangement formed by the connector, the alignment arrangement including first and second tapered regions formed on one of the hub and the housing, and also including first and second parallel contact lines formed on the other of the hub and the housing, the first and second parallel contact lines and the first and second tapered regions being spaced apart on opposite sides of a longitudinal axis of the connector;

wherein the first tapered region engages the first contact line and the second tapered region engages the second contact line when the hub and ferrule are in a first rotational position relative to the housing so that an end of the optical fiber is maintained at a known orientation with respect to the longitudinal axis of the connector.

11. A method for using a fiber optic connector comprising steps of:

providing a ferrule surrounding an optical fiber with a hub retainably engaging the ferrule, the hub including opposing first and second tapered portions;

providing a housing including a first contact line positioned to engage the first tapered portion and a second contact line positioned to engage the second tapered portion;

pushing the ferrule back to disengage the first and second tapered portions of the hub from the first and second contact lines of the housing; and

releasing the ferrule so that the first tapered portion engages the first contact line and the second tapered portion engages the second contact line, thereby retaining the optical fiber at a known orientation with respect to the longitudinal axis of the connector.

12. The method of claim 11, further comprising a step of rotating the ferrule to tune the connector.

13. The method of claim 12, further comprising a step of releasing the ferrule so that the first tapered portion engages the second contact line and the second tapered portion engages the first contact line

14. The method of claim 11, further comprising steps of:

connecting the connector to a second connector so that the optical fiber matingly engages a second optical fiber in the second connector, thereby causing the hub to be pushed back and the first tapered portion to disengage from the first contact line and the second tapered portion to disengage from the second contact line; and

disconnecting the connector from the second connector so that the first tapered portion re-engages the first contact line and the second tapered portion re-engages the second contact line, thereby retaining the optical fiber at the known orientation.

15. The method of claim 11, further comprising steps of:

providing third and fourth contact lines on the housing;

pushing the ferrule back to disengage the first and second tapered portions of the hub from the first and second contact lines of the housing;

rotating the ferrule to tune the connector; and

releasing the ferrule so that the first tapered portion engages the third contact line and the second tapered portion engages the fourth contact line, thereby retaining the optical fiber at a known orientation with respect to the longitudinal axis of the connector.