Spacer and strain relief for fiber optic connectors

• US 6,585,421 B1
• Filed: 09/15/2000
• Issued: 07/01/2003
• Est. Priority Date: 09/15/2000
• Status: Expired due to Term

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Barnes, Brandon A., Leyva, Daniel Jr.
• Primary Examiner(s): Epps, Georgia
• Assistant Examiner(s): HINDI, OMAR Z
• Application Number:
  US09/662,942
• Time in Patent Office: 1,019 Days
• Field of Search: 385/53, 385/59, 385/56, 385/62, 385/55, 385/70, 385/71, 385/72, 385/96, 385/98, 385/97
• US Class Current: 385/53
• CPC Class Codes: G02B 6/3644 the coupling means being through-holes or wall apertures
• CPC Class Codes: G02B 6/3696 by moulding, e.g. injection moulding, casting, embossing, stamping, stenciling, printing, or with metallic mould insert manufacturing using LIGA or MIGA techniques shaping the mould surface by machining B29C33/38; moulding techniques B29C39/00, B29C43/00, B29C45/00, B29C48/00, B29C59/00; stamping, printing or embossing techniques B81C1/00444; surface micromachining using LIGA B81C2201/032
• CPC Class Codes: G02B 6/3833 Details of mounting fibres in ferrules; Assembly methods; Manufacture
• CPC Class Codes: G02B 6/3834 Means for centering or aligning the light guide within the ferrule
• CPC Class Codes: G02B 6/3837 forwarding or threading methods of light guides into apertures of ferrule centering means
• CPC Class Codes: G02B 6/3846 with fibre stubs
• CPC Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression

Abstract

A spacer is provided to assist in orienting and aligning optical fibers in a connector. The spacer may also provide strain relief for the optical fibers. The spacer is especially useful with smaller optical fibers that are to be used in connectors that are designed for larger optical fibers or cables. Openings extending through the spacer, which may have a channel that allows for communication between the openings. The spacer can have as many openings as there are fibers for the connector. The spacer also assists in holding the fibers during the cleaving process so that the fibers are cleaved simultaneously and consistently.

Claims

1. A spacer for use with a multifiber connector, the spacer comprising:

an elongated central element, said elongated central element being formed of a resin material and having first and second ends formed thereon;

at least two openings extending between the first and second ends of the elongated central element; and

a channel in the elongated central element and in communication with the at least two openings to allow an optical fiber to pass therethrough.

2. The spacer according to claim 1, wherein the channel is sized to allow a 125 micron fiber to pass therethrough.

3. The spacer according to claim 1, wherein the elongated central element has a longitudinal axis, the longitudinal axis being parallel to the openings, and wherein at least one of the first and second ends is oriented at an angle between 30°

and 90°

relative to the longitudinal axis to allow for easier insertion of optical fibers.

4. The spacer according to claim 1, wherein the at least two openings are each sized for a 250 micron fiber.

5. The spacer according to claim 1, wherein the at least two openings are generally annular.

6. The spacer according to claim 1, wherein the elongated central element has a generally oval shape.

7. The spacer according to claim 1, wherein the openings have centers that are about 750 microns apart.

8. The spacer according to claim 1, the spacer is made of a resilient material.

9. The spacer according to claim 8, wherein the spacer is made of Teflon.

10. The spacer according to claim 1, wherein the spacer is monolithic.

11. The spacer according to claim 1, wherein the spacer is extruded.

12. The spacer according to claim 1, wherein the spacer is injection molded.

13. The spacer according to claim 1, wherein the second end of the elongated central element has a flared portion to allow easier insertion of optical fibers.

14. The spacer according to claim 1, wherein the spacer is configured to fit into a fiber optic connector that is configured to accept at least two 900 Micron optical fibers.

15. The spacer according to claim 1, wherein spacer is configured to fit within a lead-in tube of a fiber optic connector.

16. The spacer according to claim 15, wherein the spacer provides strain relief for the optical fibers when the lead-in tube is crushed around the spacer.

17. A spacer for use with a multifiber connector, the spacer comprising:

a resilient elongated central element having a first and second end;

at least two openings extending between the first and second ends of the elongated central element, the openings have centers that are about 750 microns apart; and

a channel in the elongated central element and in communication with the at least two openings to allow an optical fiber to pass therethrough.

18. The spacer of claim 17, wherein at least one end of the resilient elongated central element has a flared portion to allow easier insertion of optical fibers.

19. A spacer for use with a multifiber connector, the spacer comprising:

an elongated central element having a first and second end; and

at least two openings extending between the first and second ends of the elongated central element, said openings being sized for an optical fiber having a diameter of about 250 microns;

wherein the elongated central element has a longitudinal axis, the longitudinal axis being parallel to the openings, and wherein at least one of the first and second ends is oriented at an angle between about 30° and

90°

relative to the longitudinal axis to allow for easier insertion of optical fibers.

20. A spacer fiber use with a multifiber connector, the spacer comprising:

an elongated central element having first and second ends; and

at least two openings extending between the first and second ends of the elongated central element, said openings having centers that are about 750 microns apart; and

wherein the elongated central element is comprised of two halves joined along an edge parallel to the openings.

21. A spacer for use with a multifiber connector, comprising:

said spacer being formed of a resilient fluorocarbon resin material imparting mechanical resiliency to said spacer, and said spacer comprising an elongated central element having first and second ends, at least two openings extending between said first and second ends and a channel m the elongated central element and in communication with the at least two openings to allow an optical fiber to pass therethrough.

22. A multifiber fiber optic connector assembly, said assembly comprising:

a spacer, said spacer being formed of a resilient material imparing mechanical resiliency to said spacer, and said spacer comprising an elongated central element having first and second ends, at least two openings extending between said first and second ends and a channel in the elongated central element and in communication with the at least two openings to allow an optical fiber to pass therethrough; and

a lead-in tube, said spacer being inserted into said lead-in tube, said lead-in tube being crimpable about said spacer, said resiliency inhibiting optical attenuation effects, and providing strain relief and protection of said optical fibers.

23. The assembly of claim 22, said resilient material comprising a fluorocarbon material.

24. The assembly of claim 22, said at least two openings being sized for an optical fiber of about 250 microns in diameter.

25. A spacer for use with a multifiber connector, the spacer comprising:

an elongated central element, said elongated central element being formed of a resin material and having first and second ends formed thereon; and

at least two openings extending between the first and second ends of the elongated central element;

wherein the elongated central element has a longitudinal axis, the longitudinal axis being

parallel to the openings, and wherein at least one of the first and second ends is oriented at an angle between about 30° and

90°

relative to the longitudinal axis to allow for easier insertion of optical fibers.

26. A spacer for use with a multifiber connector, the spacer comprising:

a resilient elongated central element having a first and second end; and

at least two openings extending between the first and second ends of the elongated central element, the openings have centers that are about 750 microns apart and

wherein the elongated central element is comprised of two halves joined along an edge parallel to the openings.