Method and apparatus of pull-lever release for fiber optic modules

• US 6,942,395 B1
• Filed: 01/24/2002
• Issued: 09/13/2005
• Est. Priority Date: 01/29/2001
• Status: Expired due to Fees

• Current Assignee: JDS Uniphase Corporation (Lumentum Holdings Inc.)
• Original Assignee: JDS Uniphase Corporation (Lumentum Holdings Inc.)
• Inventors: Peng, Sim Yong, Chuan, Ron Pang Cheng
• Primary Examiner(s): DUVERNE, JEAN F
• Application Number:
  US10/056,394
• Time in Patent Office: 1,328 Days
• Field of Search: 385/53, 385/60, 385/97, 385/90, 439/577, 439/65, 439/357, 439/76.1, 439/92, 439/95
• US Class Current: 385/53
• CPC Class Codes: G02B 6/4246 Bidirectionally operating package structures
• CPC Class Codes: G02B 6/4277 Protection against electromagnetic interference [EMI], e.g. shielding means shielding of electric apparatus H05K9/00, of instruments G12B17/00
• CPC Class Codes: G02B 6/4278 related to pluggable or demountable opto-electronic or electronic elements
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Abstract

A fiber optic module having a pull-lever actuator to unplug it from a cage or a module receptacle. In one embodiment, the pull-lever actuator includes a pull grip, a de-latching arm, and an electromagnetic interference (EMI) shield with grounding tabs to couple to the cage or module receptacle to connect to ground. The pull-lever actuator makes it easy to de-latch and unplug a fiber optic module from the cage or module receptacle.

Claims

1. A fiber optic module comprising:

a pull-lever actuator to disengage and withdraw the fiber optic module from a cage assembly; and

one or more electro-optic transducers to convert optical signals into electrical signals or electrical signals into optical signals

wherein the pull-lever actuator includes a lever arm to lever between the fiber optic module and the cage assembly for flexing the cage assembly, thereby releasing a hook of the fiber optic module from a latch of the cage assembly.

2. The fiber optic module of claim 1 wherein, the pull-lever actuator is activated to disengage and withdraw the fiber optic module by a single downward pull action.

3. The fiber optic module of claim 1, wherein the latch comprises a catch to retain the hook therein.

4. The fiber optic module of claim 1 further comprising:

one or more electrical contacts to couple to one or more electrical contacts of a host printed circuit board.

5. The fiber optic module of claim 1 further comprising:

an edge connection of a printed circuit board with one or more electrical contacts to couple to an edge connector of a host printed circuit board.

6. The fiber optic module of claim 1 wherein, the fiber optic module is an SFP fiber optic module and the cage assembly is an SFP cage assembly.

7. The fiber optic module of claim 1, further comprising a nose receptacle for receiving one or more optical fibers;

and an optical port for supporting the one or more electro-optic transducers;

wherein, the pull-lever actuator includes an EMI shield extending from the lever arm between the nose receptacle and the optical port to contain EMI emissions.

8. The fiber optic module of claim 1 wherein, the pull-lever actuator includes:

a pull grip,

a lever arm coupled to the pull grip,

an EMI shield coupled to the lever arm, and

grounding tabs coupled to the EMI shield.

9. The fiber optic module of claim 1 wherein, the pull-lever actuator includes a pull grip having dimples to prevent slippage of a user'"'"'s grip on the pull-lever actuator.

10. The fiber optic module of claim 1 wherein, the pull-lever actuator includes a pull ring to allow a user'"'"'s finger to pull down and out on the pull-lever actuator.

11. The fiber optic module of claim 1 wherein, the pull-lever actuator is formed of a conductive material.

12. The fiber optic module of claim 11 wherein, the pull-lever actuator is formed of metal.

13. The fiber optic module of claim 1, wherein:

the one or more electro-optic transducers includes a first electro-optic transducer and a second electro-optic transducer,

the first electro-optic transducer to convert optical signals into electrical signals, and

the second electro-optic transducer to convert electrical signals into optical signals.

14. The fiber optic module of claim 1 further comprising:

a printed circuit board, the one or more electro-optic transducers coupled to the printed circuit board; and

a housing over the printed circuit board and the one or more electro-optic transducers.

15. The fiber optic module according to claim 1, wherein the pull-lever actuator includes a hole through which the catch extends.

16. A pull-lever actuator for fiber optic modules having one or more electro-optic transducers, the pull-lever actuator comprising:

a pull grip to allow a user to grin a first end of the pull-lever actuator;

a lever arm coupled to the pull grip, the lever arm to lever between the fiber optic module and a cage assembly to flex the cage and release a hook of the fiber optic module from a latch of the cage assembly;

an EMI shield coupled to the lever arm at a second end of the pull-lever actuator, the EMI shield to contain EMI emissions; and

grounding tabs coupled to the EMI shield, the grounding tabs to provide a grounding link between the EMI shield and the cage assembly.

17. The pull-lever actuator of claim 16 wherein, the pull-lever actuator is activated to disengage and withdraw the fiber optic module from the cage assembly by a single downward pull action.

18. The pull-lever actuator of claim 16 wherein, the pull grip has dimples.

19. The pull-lever actuator of claim 16 wherein, the pull-lever actuator is formed of metal.

20. The pull-lever actuator of claim 16 wherein, the fiber optic module is an SFP fiber optic module and the cage assembly is an SFP cage assembly.

21. The pull-lever actuator of claim 16, wherein the fiber optic module includes:

a nose receptacle for receiving one or more optical fiber; and

an optical port for supporting the one or more optical fibers; and

wherein the EMI shield extends from the lever arm between the nose receptacle and the optical port to contain EMI emissions.

22. A method to withdraw a fiber optic module including a hook from a cage including a latch, the method comprising:

providing a pull-lever actuator for the fiber optic module extending between the fiber optic module and the cage;

pushing down on an end of the pull-lever actuator to flex the cage, thereby releasing the hook from the latch; and

pulling out on the end of the pull-lever actuator to withdraw the fiber optic module from the cage.

23. The method of claim 22 wherein, the fiber optic module includes a hook to engage the catch of the latch of the cage when inserted therein and the pushing down of the end of the pull-lever actuator levers the latch so the catch is disengaged from the hook.

24. The method of claim 22 wherein, the pushing down and pulling out on the end of the pull-lever actuator is by one motion.

25. A method to withdraw a fiber optic module with a hook extending therefrom from a cage with a latch thereon, the method comprising:

providing a lever actuator extending between the fiber optic module and the cage, and a pull actuator for the fiber optic module;

pushing down on an end of the lever actuator to flex the latch, thereby releasing the hook from the latch; and

pulling out on an end of the pull actuator to withdraw the fiber optic module from the cage.

26. The method of claim 25 wherein:

the fiber optic module includes a hook to engage the catch of the latch of the cage when inserted therein; and

the pushing down of the end of the lever actuator levers the latch so the catch is disengaged from the hook.

27. The method of claim 25 wherein, the pulling out on the end of the pull actuator withdraws the fiber optic module.

28. A fiber optic module comprising:

a lever actuator to disengage the fiber optic module from a cage assembly;

a pull actuator to withdraw the fiber optic module from the cage assembly; and

one or more electro-optic transducers to convert between optical signals and electrical signals;

wherein the lever actuator includes a lever arm to lever between the fiber optic module and the cage assembly for flexing the cage assembly, thereby releasing a hook of the fiber optic module from a latch of the cage assembly.

29. The fiber optic module of claim 28 wherein, the lever actuator to lever a latch of a cage and to release a catch of the fiber optic module.

30. The fiber optic module of claim 29 wherein, the catch to engage the latch of the cage to retain the fiber optic module therein.

31. The fiber optic module of claim 28 further comprising:

an edge connection of a printed circuit board with one or more electrical contacts to couple to an edge connector of a host printed circuit board.

32. The fiber optic module of claim 28 wherein, the fiber optic module is an SFP fiber optic module which can be inserted and withdrawn from an SFP cage.

33. The fiber optic module of claim 28 wherein, the pull actuator for a user to pull out on the fiber optic module and to withdraw it from a cage.

34. The fiber optic module of claim 28 further comprising:

a printed circuit board, the one or more electro-optic transducers coupled to the printed circuit board; and

a housing over the printed circuit board and the one or more electro-optic transducers.

35. The fiber optic module of claim 28, wherein:

the one or more electro-optic transducers includes a

first electro-optic transducer and a second electro-optic transducer,

the first electro-optic transducer to convert optical signals into electrical signals, and

the second electro-optic transducer to convert electrical signals into optical signals.