Multi-channel optical fiber connector

• US 5,159,654 A
• Filed: 10/25/1991
• Issued: 10/27/1992
• Est. Priority Date: 10/25/1991
• Status: Expired due to Term

• Current Assignee: Camino Neurocare, Inc.
• Original Assignee: Optex Biomedical, Inc.
• Inventors: Salter, James R.
• Primary Examiner(s): Healy, Brian
• Application Number:
  US07/782,557
• Time in Patent Office: 368 Days
• Field of Search: 385/54, 385/55, 385/59, 385/71, 385/65, 385/12, 385/136, 385/137, 250/227.11, 250/227.14, 356/40, 356/41, 356/39
• US Class Current: 385/59
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3847 with means preventing fibre end damage, e.g. recessed fibre surfaces
• CPC Class Codes: G02B 6/3885 Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type optical ribbon cable G02B6/4403, G02B6/448
• CPC Class Codes: G02B 6/389 characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock, snap-in, bayonet type

Abstract

Methods and apparatuses for securely aligning a plurality of optical fiber pairs, including a connection device with a body having recesses therein for a fiber guide to which are mounted a plurality of optical fibers, a removable connector to which are mounted a corresponding plurality of fibers, and a movable locking member disposed in the body and which positively holds the connector in the body so that ends of pairs of fibers are aligned and the connector is securely disposed in the body; and a sensing system with a base unit and optical fibers which employs such a connection device.

Claims

1. A multi-fiber connector assembly for interfacing a plurality of optical fibers in aligned pairs to facilitate the transmission of signals therethrough, the assembly comprising

a receptacle body having a connector recess therein, a fiber guide recess therein, and a locking member recess therein,

a fiber guide secured in the fiber guide recess with a plurality of transmission optical fibers mounted thereto,

a connector body removably securable in the connector recess with a plurality of sensing optical fibers mounted thereto, and

a locking member movably mounted in the locking recess and movable to contact and urge the connector body into a position in the connector recess so that each of the sensing fibers is paired adjacent one of the transmission fibers and adjacent ends of each fiber pair are aligned for signal transmission therethrough.

2. The connector assembly of claim 1 wherein

the transmission optical fibers are secured in grooves in the fiber guide, one fiber in each groove, and

the sensing optical fibers are secured in grooves in the connector body, one fiber in each groove.

3. The connector assembly of claim 2 wherein epoxy alone secures the fibers in their respective grooves.

4. The connector assembly of claim 1 wherein

the connector body has a portion with a first locking surface contactable by a second locking surface of the locking member, the locking surfaces angled correspondingly so that the locking member urges the connector body in three orthogonal directions to stabilize the connector body within the receptacle body and to align the fibers of each fiber pair.

5. The connector assembly of claim 1 wherein stop means are provided in and through the receptacle body for limiting movement of the connector body resulting from urging of the connector body by the locking member.

6. The connector assembly of claim 4 wherein stop means are provided in the assembly for limiting movement of the connector body in each of the three orthogonal directions.

7. The connector assembly of claim 1 wherein the transmission optical fibers are larger in diameter than the sensing optical fibers.

8. The connector assembly of claim 1 wherein

a tracking recess is provided in the receptacle body for receiving a protruding portion of the connector body to facilitate correct insertion of the connector body into the receptacle body.

9. The connector assembly of claim 1 wherein

a spring is disposed between the locking member and a wall of the receptacle body, the spring urging the locking member outwardly, and

a stop member extending from the locking member is disposed in a stop member recess in the receptacle body, the stop member contacting a wall of the stop member recess to prevent the spring from moving the locking member completely out of the receptacle body.

10. The connector assembly of claim 9 wherein

a spring recess in the locking member receives and holds a portion of the spring.

11. The connector assembly of claim 2 wherein

the connector body comprises a lower body member and an upper lid,

the lower body member having a recess for receiving a protruding portion of the upper lid thereby providing correct position of the lower body member with respect to the lid, and

the lid disposable above the grooves in which are disposed the sensing optical fibers to close off a top opening of each groove.

12. The connector assembly of claim 2 wherein

the receptacle body comprises an upper part and a lower part, the lower part having the fiber guide recess therein, and

a fiber guide lid securable on the fiber guide to close off top openings of the grooves in which are disposed the transmission optical fibers.

13. The connector assembly of claim 1 wherein

the receptacle body comprises a top part and a bottom part, the top part having the locking member recess therein,

the connector recess formed by a first sub-recess in the top part and a second sub-recess in the bottom part, and

the top part having a tracking recess therein for receiving and guiding a protruding portion of the connector body to facilitate correct insertion of the connector body into the receptacle body.

14. A multi-fiber connector assembly for interfacing a plurality of optical fibers in aligned pairs to facilitate the transmission of signals therethrough, the assembly comprising

a receptacle body having a connector recess therein, a fiber guide recess therein, and a locking member recess therein,

a fiber guide secured in the fiber guide recess with a plurality of transmission optical fibers mounted thereto, the transmission optical fibers secured in grooves in the fiber guide, one fiber in each groove,

a connector body removably securable in the connector recess with a plurality of sensing optical fibers mounted thereto, the sensing optical fibers secured in grooves in the connector body, one fiber in each groove, the connector body having a first locking surface,

a locking member movably mounted in the locking recess and movable to contact and urge the connector body into a position in the connector recess so that each of the sensing fibers is paired adjacent one of the transmission fibers and adjacent ends of each fiber pair are aligned for signal transmission therethrough, the locking member having a second locking surface,

the connector body'"'"'s first locking surface contactable by the second locking surface of the locking member, the locking surfaces angled correspondingly so that the locking member urges the connector body in three orthogonal directions to stabilize the connector body within the receptacle body and to align the fibers of each fiber pair, and

stop means in and through the receptacle body for limiting movement of the connector body resulting from urging of the connector body by the locking member, the stop means limiting movement of the connector body in each of the three orthogonal directions.

15. The connector assembly of claim 14 wherein

a tracking recess is provided in the receptacle body for receiving a protruding portion of the connector body to facilitate correct insertion of the connector body into the receptacle body,

a spring is disposed between the locking member and a wall of the receptacle body, the spring urging the locking member outwardly, and a spring recess in the locking member receives and holds a portion of the spring,

a stop member extending from the locking member is disposed in a stop member recess in the receptacle body, the stop member contacting a wall of the stop member recess to prevent the spring from moving the locking member completely out of the receptacle body,

the connector body comprises

a lower body member and an upper lid,

the lower body member having a recess for receiving a protruding portion of the upper lid thereby providing correct position of the lower body member with respect to the lid, and

the lid disposable above the grooves in which are disposed the sensing optical fibers to close off a top opening of each groove,

the receptacle body comprises

an upper part and a lower part, the lower part having the fiber guide recess therein, and

a fiber guide lid securable on the fiber guide to close off top openings of the grooves in which are disposed the transmission optical fibers,

the upper part having the locking member recess therein,

the connector recess formed by a first sub-recess in the upper part and a second sub-recess in the lower part, and

the upper part having a tracking recess therein for receiving and guiding a protruding portion of the connector body to facilitate correct insertion of the connector body into the receptacle body.

16. A sensing system employing fiber optics as sensing elements, the sensing system comprising

a base unit for controlling light sent through the fiber optics and for monitoring light received through the fiber optics,

transmission fiber optics extending from the base unit to a connector assembly,

sensing fiber optics extending from the connector assembly to a sensor device,

the connector assembly comprising a multi-fiber connector assembly for

interfacing a plurality of optical fibers in aligned pairs to facilitate the transmission of signals therethrough, the assembly comprising

a receptacle body having a connector recess therein, a fiber guide recess therein, and a locking member recess therein,

a fiber guide secured in the fiber guide recess with a plurality of transmission optical fibers mounted thereto,

a connector body removably securable in the connector recess with a plurality of sensing optical fibers mounted thereto, and

a locking member movably mounted in the locking recess and movable to contact and urge the connector body into a position in the connector recess so that each of the sensing fibers is paired adjacent one of the transmission fibers and adjacent ends of each fiber pair are aligned for signal transmission therethrough.

17. The sensing system of claim 16 wherein

the connector body has a first locking surface,

the locking member has a second locking surface,

the locking surfaces angled correspondingly so that the locking member urges the connector body in three orthogonal directions to stabilize the connector body within the receptacle body and to align the fibers of each fiber pair, and

stop means in and through the receptacle body for limiting movement of the connector body resulting from urging of the connector body by the locking member, the stop means limiting movement of the connector body in each of the three orthogonal directions.