Connectorized inside fiber optic drop

• US 6,668,127 B1
• Filed: 11/12/2002
• Issued: 12/23/2003
• Est. Priority Date: 08/12/1999
• Status: Expired due to Term

• Current Assignee: Bellsouth Intellectual Property Corporation (AT&T, Inc.)
• Original Assignee: Bellsouth Intellectual Property Corporation (AT&T, Inc.)
• Inventors: Mahony, Glenn M.
• Primary Examiner(s): Zarroli, Michael C.
• Application Number:
  US10/291,842
• Time in Patent Office: 406 Days
• Field of Search: 385/15, 385/31-35, 385/134-139
• US Class Current: 385/135
• CPC Class Codes: G02B 6/2804 forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
• CPC Class Codes: G02B 6/501 underground installation of connection boxes

Abstract

A connectorized inside fiber optic drop that facilitates the deployment of fiber to the home by connecting a fiber optic interface device to an optical network terminal, the inside fiber optic drop including a sheath, transition fittings, pigtails, fiber optic connectors, and a fiber optic strand. The sheath is positioned over a middle section of the fiber optic strand. The transition fittings are attached to the fiber optic sheath proximate to both ends of the drop. The pigtails attach to the transition fittings and enclose the fiber optic strand from the transition fittings to the ends of the fiber optic strand, where the fiber optic connectors are attached to the fiber optic strand and the pigtails. If the drop contains more than one fiber optic strand, then one set of pigtails with connectors is provided for each fiber optic strand.

Claims

1. A connectorized inside fiber drop for connecting a fiber optic interface device of a fiber to the home network to an optical network terminal of the network, the drop comprising:

at least one fiber optic strand having a first end and a second end;

a sheath enclosing a section of the at least one fiber optic strand;

a first transition fitting attached to the sheath proximate to the first end of the at least one fiber optic strand;

a second transition fitting attached to the sheath proximate to the second end of the at least one fiber optic strand;

on each fiber optic strand, a first fiber optic connector attached to the first end;

on each fiber optic strand, a second fiber optic connector attached to the second end; and

pigtails enclosing each fiber optic strand between the first transition fitting and the first fiber optic connector, and between the second transition fitting and the second fiber optic connector, and

wherein the at least one fiber optic strand floats freely within the sheath.

2. The connectorized inside fiber drop of claim 1, wherein the first transition fitting and the second transition fitting contain gel.

3. The connectorized inside fiber drop of claim 1, wherein the pigtails are coded to identify an individual fiber optic strand of the at least one fiber optic strand at its first end and its second end.

4. The connectorized inside fiber drop of claim 1, wherein the pigtails bend to a smaller radius than the sheath.

5. The connectorized inside fiber drop of claim 1, wherein the sheath does not contain metallic strength members.

6. The connectorized insider fiber drop of claim 1, wherein the pigtails are between about 2.2 mm and 3.0 mm in thickness.

7. The connectorized inside fiber drop of claim 1, wherein the connectorized inside fiber drop has a single-mode attenuation coefficient of less than 0.4 dB/km between 1270 nm and 1350 nm, and 0.3 dB/km between 1500 nm and 1600 nm.

8. A connectorized inside fiber drop for connecting a fiber optic interface device of a fiber to the home network to an optical network terminal of the network, the drop comprising:

a sheath having a first sheath end and a second sheath end;

a first transition fitting attached to the first sheath end;

a second transition fitting attached to the second sheath end;

a first pigtail attached to the first transition fitting;

a second pigtail attached to the second transition fitting;

a fiber optic strand extending from the first pigtail to the second pigtail, wherein the fiber optic strand has a first strand end and a second strand end;

a first fiber optic connector attached to the first strand end; and

a second fiber optic connector attached to the second strand end.

9. The connectorized inside fiber drop of claim 8, wherein the first transition fitting and the second transition fitting contain gel.

10. The connectorized inside fiber drop of claim 8, wherein the first pigtail and the second pigtail bend to a smaller radius than the sheath.

11. The connectorized inside fiber drop of claim 8, wherein the pigtails are adapted to be coiled within the fiber optic interface device and the optical network terminal to provide length adjustment of the connectorized inside fiber drop.

12. The connectorized inside fiber drop of claim 8, wherein the first pigtail is attached to the first fiber optic connector and wherein the second pigtail is attached to the second fiber optic connector.

13. The connectorized inside fiber drop of claim 8, wherein the fiber optic strand floats freely within the sheath.

14. The connectorized inside fiber drop of claim 8, wherein the sheath complies with GR-409-CORE, Generic Requirements for Premise Fiber Optical Cable, Issue 1, May 1994.

15. The connectorized inside fiber drop of claim 8, wherein the first transition fitting and the second transition fitting provide strain relief for the connectorized inside fiber drop.

16. A method for connecting a fiber optic interface device to an optical network terminal in a fiber to the home network, the method comprising:

routing a fiber optic strand from the fiber optic interface device to the optical network terminal, wherein the fiber optic strand has a first end and a second end that are connectorized, wherein a middle portion of the fiber optic strand is enclosed in a sheath, wherein the fiber optic strand is enclosed in a first pigtail from the first end to the sheath, and wherein the fiber optic strand is enclosed in a second pigtail from the second end to the sheath;

placing the first pigtail in the fiber optic interface device;

inserting the first end of the fiber optic strand into a connectorized termination of the fiber optic interface device;

placing the second pigtail in the optical network terminal; and

inserting the second end of the fiber optic strand into a connectorized termination of the optical network terminal.

17. The method of claim 16, further comprising:

providing a transition fitting between the sheath and the first pigtail; and

securing the transition fitting to the fiber optic interface device.

18. The method of claim 16, wherein placing the first pigtail in the fiber optic interface device comprises storing slack of the first pigtail.

19. The method of claim 16, further comprising:

providing a transition fitting between the sheath and the second pigtail; and

securing the transition fitting to the optical network terminal.

20. The method of claim 16, wherein the sheath runs from the fiber optic interface device to the optical network terminal.