Fiber-optic modules with shielded housing/covers having mixed finger types

• US 6,607,308 B2
• Filed: 08/22/2001
• Issued: 08/19/2003
• Est. Priority Date: 02/12/2001
• Status: Expired due to Term

• Current Assignee: Lumentum Operations, LLC (Lumentum Holdings Inc.)
• Original Assignee: E2O Communications Incorporated (Lumentum Holdings Inc.)
• Inventors: Sim, Yong Peng, Wei, Cheng Ping, Dair, Edwin, Jiang, Wenbin
• Primary Examiner(s): Feild, Lynn
• Assistant Examiner(s): WEBB, BRIAN SCOTT
• Application Number:
  US09/934,875
• Publication Number:
  US 20020110338A1
• Time in Patent Office: 727 Days
• Field of Search: 385/92, 439/607, 439/609, 439/939
• US Class Current: 385/92
• CPC Class Codes: G02B 6/4201 Packages, e.g. shape, construction, internal or external details
• CPC Class Codes: G02B 6/4245 Mounting of the opto-electronic elements
• CPC Class Codes: G02B 6/4246 Bidirectionally operating package structures
• CPC Class Codes: G02B 6/4256 Details of housings
• 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 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Abstract

A fiber-optic module having a housing/shielding unit and a module chassis frame having optical, electrical and electro-optical components. The housing/shielding unit functions both as a protective outer housing and an electromagnetic shield. The housing/shielding unit includes forward fingers and backward fingers. The forward fingers provide an EMI seal around an opening in a bezel, face-plate, backplate, wall, or panel of a host system and thereby can ground the housing/shielding unit to a chassis ground. The backward fingers can contact host tabs of the host system and can also thereby ground the housing/shielding unit to a chassis ground. The module chassis frame may be formed of a conductive material and can be grounded as well through a host system faceplate or otherwise to the chassis ground.

Claims

1. A fiber-optic module comprising:

a module chassis frame having optical, electrical, and opto-electronic components affixed therein, the optical, electrical, and opto-electronic components to process optical and electrical signals; and

a housing/shielding unit around the module chassis frame, housing/shielding unit including a front portion and a back portion, the housing/shielding unit having a frontal opening to accept a fiber-optic cable connector, the housing/shielding unit is conductive and has one or more forward fingers and one or more backward fingers near an edge of the frontal opening to ground the housing/shielding unit and to provide an electromagnetic interference (EMI) seal around an opening in a bezel.

2. The fiber-optic module of claim 1 wherein,

the housing/shielding unit protects the optical, electrical, and opto-electronic components and shields electromagnetic radiation.

3. The fiber-optic module of claim 1 wherein,

the one or more forward fingers curve outward and forward from the edge of the frontal opening.

4. The fiber-optic module of claim 1 wherein,

the one or more backward fingers lift up from one or more surfaces of the housing/shielding unit and extend away from the edge of the frontal opening.

5. The fiber-optic module of claim 1 wherein,

the housing/shielding unit is metal, plated plastic, or conductive plastic.

6. The fiber-optic module of claim 1 wherein,

the module chassis frame is non-conductive and includes a pin to mount the fiber optic module to a host printed circuit board.

7. The fiber-optic module of claim 6 wherein,

the fiber optic module includes a duplex SC optical connector and the fiber-optic module is a 1×

9 fiber optic module.

8. The fiber-optic module of claim 1 wherein,

the optical, electrical, and opto-electronic components include a transmitter subassembly and a receiver subassembly to transceive optical signals over a duplex optical fiber ribbon and the fiber optic module is a fiber-optic transceiver module.

9. The fiber-optic module of claim 1 wherein,

at least one forward finger of the one or more forward fingers extends from a right side and a left side of the housing/shielding unit, and

at least one backward finger of the one or more backward fingers extends from a top side of the housing/shielding unit.

10. The fiber-optic module of claim 1 wherein,

at least one forward finger of the one or more forward fingers extends from a right side and a left side of the housing/shielding unit, and

at least one backward finger of the one or more backward fingers extends from a bottom side of the housing/shielding unit.

11. The fiber-optic module of claim 1 wherein,

at least one forward finger of the one or more forward fingers extends from a right side and a left side of the housing/shielding unit, and

at least one backward finger of the one or more backward fingers extends from a top side and a bottom side of the housing/shielding unit.

12. The fiber-optic module of claim 1 wherein,

at least one backward finger of the one or more backward fingers extends from a right side and a left side of the housing/shielding unit, and

at least one forward finger of the one or more forward fingers extends from a top side of the housing/shielding unit.

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

at least one backward finger of the one or more backward fingers extends from a right side and a left side of the housing/shielding unit, and

at least one forward finger of the one or more forward fingers extends from a top side and a bottom side of the housing/shielding unit.

14. The fiber-optic module of claim 1 wherein,

the one or more fingers are equally sized and equally spaced around each side around a perimeter of the housing/shielding unit.

15. The fiber-optic module of claim 1, wherein

the housing/shielding unit further has

a pair of bottom side flaps, and

a strap and a septum coupled to the strap,

the strap wrapping around a part of the frontal opening and the module chassis frame, the septum to couple to the pair of bottom side flaps, the strap and the septum to hold the module chassis frame and the housing/shielding unit together.

16. The fiber-optic module of claim 15 wherein,

the internal electromagnetic shield is a shielding collar around an opto-electronic device to shield it from electromagnetic radiation.

17. The fiber-optic module of claim 15 wherein,

the one or more forward fingers of the housing/shielding unit are spring loaded to flex into position and couple to a bezel, faceplate, or panel, and

the one or more backward fingers are spring loaded to flex into position and couple to one or more host tabs.

18. The fiber-optic module of claim 1 wherein,

the housing/shielding unit is an external electromagnetic shield and the fiber-optic module further has an internal electromagnetic shield coupled to the housing/shielding unit.

19. The fiber-optic module of claim 18 wherein,

the internal electromagnetic shield is a U-plate to provide an EMI seal around an optical connector and deter electromagnetic radiation from leaking out through the frontal opening of the fiber optic module.

20. The fiber-optic module of claim 19 wherein,

the U-plate includes a flap, the flap to couple to the housing/shielding unit to ground the U-plate when the housing/shielding unit is grounded.

21. The fiber-optic module of claim 1 wherein,

at least one forward finger of the one or more forward fingers extends from a right side or a left side of the housing/shielding unit to couple to a backside surface of the bezel near the opening, and

at least one backward finger of the one or more backward fingers extends from a top side of the housing/shielding unit to couple to at least one host tab of the bezel.

22. The fiber-optic module of claim 1 wherein,

at least one forward finger of the one or more forward fingers extends from a right side or a left side of the housing/shielding unit to couple to a backside surface of the bezel near the opening, and

at least one backward finger of the one or more backward fingers extends from a bottom side of the housing/shielding unit to couple to at least one host tab of the bezel.

23. The fiber-optic module of claim 1 wherein,

at least a pair of forward fingers of the one or more forward fingers extend respectively from a right side and a left side of the housing/shielding unit to couple to a backside surface of the bezel near the opening, and

at least a pair of backward finger of the one or more backward fingers extend respectively from a top side and a bottom side of the housing/shielding unit to couple to a pair of host tabs of the bezel.

24. The fiber-optic module of claim 1 wherein,

at least a pair of backward fingers of the one or more backward fingers extend respectively from a right side and a left side of the housing/shielding unit to couple to a pair of host tabs of the bezel, and

at least one forward finger of the one or more forward fingers extends from a top side of the housing/shielding unit to couple to a backside surface of the bezel near the opening.

25. The fiber-optic module of claim 1 wherein,

at least a pair of backward fingers of the one or more backward fingers extend respectively from a right side and a left side of the housing/shielding unit to couple to a pair of host tabs of the bezel, and

at least a pair of forward fingers of the one or more forward fingers extend respectively from a top side and a bottom side of the housing/shielding unit to couple to a backside surface of the bezel near the opening.

26. The fiber-optic module of claim 1 wherein,

the bezel is a faceplate, a backplate, or a host panel of a host system.

27. The fiber-optic module of claim 1 wherein,

the front portion of the housing/shielding unit includes the one or more forward fingers and the one or more backward fingers.

28. The fiber-optic module of claim 27 wherein,

the back portion of the housing/shielding unit is around the module chassis frame to cover over the optical, electrical, and opto-electronic components affixed therein.

29. The fiber-optic module of claim 27 wherein,

the front portion of the housing/shielding unit is around the module chassis frame to cover over an optical connector receptacle of the module chassis frame.

30. A fiber-optic module comprising:

a chassis having a pair of optical connector receptacles at one end and a pair of walls coupled to a base at an opposite end, the pair of walls having slots on inside surfaces, the pair of optical connector receptacles having a rectangular opening along the width of the chassis, the base having one or more pin openings;

a printed circuit board coupled into the slots in the pair of walls of the chassis, the printed circuit board having one or more pins in the one or more pin openings in the base of the chassis, the printed circuit board having electrical components to process electrical signals of the one or more pins;

a pair of opto-electronic components having pins coupled to traces of the printed circuit board at an edge, the traces coupled to at least one of the one or more pins and the electrical components of the printed circuit board, the pair of opto-electronic components to process electrical and optical signals;

a pair of optical connectors each having an optical port with a lens, a flange, a snap lock clip, a ferrule barrel, and a recess between the optical port and the flange, the pair of optical ports of the pair of optical connectors coupled to the pair of opto-electronic components respectively at one end and each of the snap lock clip and the ferrule barrel inserted into the respective pair of optical connector receptacles of the chassis at an opposite end;

a plate having a pair of u-shaped openings and a flap, the plate inserted into the rectangular opening of the chassis, the u-shaped openings of the plate engaging the recess between the optical port and the flange in each pair of the optical connectors to hold the pair of opto-electronic components and the pair of optical connectors to the chassis;

a first portion of a shielded housing around the chassis to protect the pair of opto-electronic components and the electrical components; and

a second portion of the shielded housing around the chassis coupled to the plate, the second portion of the shielded housing having one or more forward fingers and one or more backward fingers to couple to a panel.

31. The fiber-optic module of claim 30 wherein,

the first portion of the shielded housing to protect the printed circuit board, its electrical components and the pair of opto-electronic devices coupled to the printed circuit board,

the second portion of the shielded housing to shield external electrical components from electromagnetic radiation generated by the pair of opto-electronic devices and the electrical components, and

the second portion of the shielded housing to shield the pair of opto-electronic devices and the electrical components from electromagnetic radiation generated by external electrical components.

32. The fiber-optic module of claim 30 further comprising:

a pair of collars around the optical ports of the pair of optical connectors, the pair of collars coupled to the plate to couple to ground, the pair of collars to shield the pair of opto-electronic devices.

33. The fiber-optic module of claim 32 wherein,

the pair of collars to shield the pair of opto-electronic devices from electromagnetic radiation generated by the other to reduce cross-talk.

34. The fiber-optic module of claim 30 wherein,

the pair of opto-electronic devices couple to the printed circuit board by coupling pins to traces on a top side and a bottom side of the printed circuit board in a straddle mounted configuration.

35. The fiber-optic module of claim 30 wherein,

the chassis is formed of a conductive material to further shield the fiber optic module.

36. The fiber-optic module of claim 35 wherein,

the chassis further has a pair of mounting pins to mount the fiber optic module to a host printed circuit board.

37. The fiber-optic module of claim 30 wherein,

the chassis further has a pair of mounting pins coupled to a bottom surface to mount the fiber optic module.

38. The fiber-optic module of claim 30 wherein,

the chassis further has a slot between the pair of optical connector receptacles.

39. The fiber-optic module of claim 38 wherein,

the front portion of the shielded housing has a strap at one end and a septum at an opposite end to hold the shielded housing around the chassis coupled, the strap engaged in the slot of the chassis between the pair of optical connector receptacles.

40. The fiber-optic module of claim 30 wherein,

the front portion of the shielded housing is an external electromagnetic shield and the plate is an internal electromagnetic shield coupled to the external electromagnetic shield.

41. The fiber-optic module of claim 30 wherein,

the pair of optical connectors are SC optical connectors and the fiber-optic module is a 1×

9 fiber-optic module.

42. The fiber-optic module of claim 30 wherein,

the one or more forward fingers curve outward and forward from the edge.

43. The fiber-optic module of claim 30 wherein,

the one or more backward fingers lift up from one or more surfaces of the shielded housing and extend backward from the edge.

44. The fiber-optic module of claim 30 wherein,

the shielded housing to conduct electromagnetic radiation to ground.

45. The fiber-optic module of claim 44 wherein,

the front portion of the shielded housing is metal, plated plastic, or conductive plastic.

46. The fiber-optic module of claim 44 wherein,

the one or more forward fingers are equally sized and equally spaced around a portion of the perimeter of the shielded housing.

47. A system for providing electromagnetic interference (EMI) shielding, the system comprising:

a module chassis frame having a front end and a back end, the front end being open to allow for a printed circuit board including electrical components to be attached therein, the back end of the module chassis frame having a pair of separately enclosed hollow compartments, one hollow compartment to house a transmitter subassembly and another hollow compartment to house a receiver subassembly;

the transmitter subassembly having a first shielding collar around a transmitter and the receiver subassembly having a second shielding collar around a receiver, an optical end of the transmitter subassembly inserted into one of the pair of separately enclosed hollow compartments and an electrical end of the transmitter subassembly coupled to the printed circuit board, an optical end of the receiver subassembly inserted into another one of the pair of separately enclosed hollow compartments and an electrical end of the receiver subassembly coupled to the printed circuit board;

a U-plate having a top portion and a bottom portion having a pair of U-shaped openings, the top portion including a flap, the U-plate coupled into a slot of the module chassis frame to hold and shield the transmitter subassembly and the receiver subassembly;

a first portion of an electromagnetic interference (EMI) shielding box wrapped around a first portion of the module chassis frame; and

a second portion of the electromagnetic interference (EMI) shielding box wrapped around a second portion of the module chassis frame and coupled to the U-plate, the second portion of the electromagnetic interference shielding box having one or more forward fingers around its perimeter to provide an EMI seal around an opening of a host system and one or more backward fingers around its perimeter to contact to a chassis ground of the host system.

48. The system of claim 47 wherein,

the EMI shielding box protects components and shield components from electromagnetic radiation.

49. The system of claim 47 wherein,

the module chassis frame is formed of a plastic, a conductive plated plastic, or a metal.

50. The system of claim 47 wherein,

the EMI shielding box is glued to the module chassis frame.

51. The system of claim 47 wherein,

the EMI shielding box is welded to the module chassis frame.

52. The system of claim 47 wherein,

the one or more forward fingers and the one or more backward fingers contact a host system faceplate of the host system to minimize electromagnetic radiation leaking out of the host system.

53. The system of claim 52 wherein,

the one or more forward fingers contact a backside of the host system faceplate around the opening therein to provide an EMI seal.

54. The system of claim 52 wherein,

the one or more backward fingers contact a surface of one or more host tabs in the host system faceplate to provide the contact to the chassis ground of the host system.

55. A fiber-optic module comprising:

a means for holding optical, electrical, and opto-electronic components, the optical, electrical, and opto-electronic components to process optical and electrical signals, the means for holding having one or more optical connector receptacles;

a first portion of a means for shielding and housing the means for holding, the first portion around the means for holding to cover over the electrical components; and

a second portion of the means for shielding and housing the means for holding, the second portion around the means for holding to cover over the one or more optical connector receptacles, the second portion having a frontal opening to accept a fiber-optic cable connector, the second portion of the means for shielding and housing being conductive and including

one or more first finger means near an edge of the frontal opening, the one or more first finger means to provide an EMI seal around an opening in a host system, and

one or more second finger means near an edge of the frontal opening, the one or more second finger means to further provide the EMI seal around the opening in the host system and a connection to a chassis ground of the host system.

56. The fiber-optic module of claim 55 wherein,

the one or more first finger means are forward fingers.

57. The fiber-optic module of claim 55 wherein,

the one or more second finger means are backward fingers and contact host tabs of the host system.

58. The fiber-optic module of claim 55 wherein,

the first and second portions of the means for shielding and housing to protect components and to shield electromagnetic radiation.

59. The fiber-optic module of claim 55 wherein,

the first and second portions of the means for shielding and housing protects the optical, electrical, and opto-electronic components and shields electromagnetic radiation.

60. The fiber-optic module of claim 55 wherein,

the first and second portions of the means for shielding and housing when coupled to a chassis ground through the one or more second finger means, conducts electromagnetic radiation thereto.

61. The fiber-optic module of claim 55 wherein,

the one or more first finger means curve outward and forward from the edge of the frontal opening.

62. The fiber-optic module of claim 55 wherein,

the one or more second means lift up from one or more surfaces of the first portion of the shielding and housing means and extend backward from the edge of the frontal opening.

63. The fiber-optic module of claim 55 wherein,

the first and second portions of the means for shielding and housing is formed out of one of metal, plated plastic, and conductive plastic.

64. The fiber-optic module of claim 55 wherein,

the optical, electrical, and opto-electronic components include a transmitter subassembly and a receiver subassembly to transceive optical signals over an optical fiber and the fiber optic module is a fiber-optic transceiver module.

65. A fiber-optic module comprising:

a module chassis frame having a printed circuit board affixed therein with electrical and opto-electronic components coupled thereto,

the electrical and opto-electronic components to process electrical and optical signals between the printed circuit board and a pair of fiber optic cables respectively,

the module chassis frame further having a pair of optical connector receptacles to receive a pair of fiber-optic cable connectors of the pair of fiber optic cables; and

a housing/shielding unit wrapped around the module chassis frame to couple thereto and cover over the printed circuit board, the electrical and opto-electronic components, and the pair of optical connector receptacles,

the housing/shielding unit having a frontal opening to accept the pair of fiber-optic cable connectors,

the housing/shielding unit is conductive and has one or more forward fingers and one or more backward fingers integral therewith near an edge of the frontal opening,

the one or more forward fingers and the one or more backward fingers to ground the housing/shielding unit to a chassis ground of a host system and to provide an electromagnetic interference (EMI) seal around an opening of a bezel of the host system.

66. The fiber-optic module of claim 65 wherein,

the housing/shielding unit includes a front portion and a back portion.

67. The fiber-optic module of claim 65 wherein,

the housing/shielding unit protects the optical, electrical, and opto-electronic components and shields electromagnetic radiation.

68. The fiber-optic module of claim 65 wherein,

the one or more forward fingers couple to a backside surface of the bezel near the opening, and

the one or more backward fingers couple to one or more host tabs of the bezel.

69. The fiber-optic module of claim 65 wherein,

the one or more forward fingers curve outward and forward from the edge of the frontal opening.

70. The fiber-optic module of claim 65 wherein,

the one or more backward fingers lift up from one or more surfaces of the housing/shielding unit and extend away from the edge of the frontal opening.

71. The fiber-optic module of claim 65 wherein,

the housing/shielding unit is metal, plated plastic, or conductive plastic.

72. The fiber-optic module of claim 65 wherein,

the module chassis frame is non-conductive and includes a pin to mount the fiber optic module to a host printed circuit board.

73. The fiber-optic module of claim 65, wherein

the housing/shielding unit further has

a pair of bottom side flaps, and

a strap and a septum coupled to the strap,

the strap wrapping around a part of the frontal opening and the module chassis frame, the septum to couple to the pair of bottom side flaps, the strap and the septum to hold the module chassis frame and the housing/shielding unit together.

74. The fiber-optic module of claim 65 wherein,

the housing/shielding unit is an external electromagnetic shield and the fiber-optic module further has an internal electromagnetic shield coupled to the housing/shielding unit.

75. The fiber-optic module of claim 74 wherein,

the internal electromagnetic shield is a U-plate to provide an EMI seal around an optical connector and deter electromagnetic radiation from leaking out through the frontal opening of the fiber optic module.

76. The fiber-optic module of claim 75 wherein,

the U-plate includes a flap, the flap to couple to the housing/shielding unit to ground the U-plate when the housing/shielding unit is grounded.

77. The fiber-optic module of claim 76 wherein,

the internal electromagnetic shield further is a shielding collar around an opto-electronic device to shield it from electromagnetic radiation.

78. The fiber-optic module of claim 65 wherein,

the one or more forward fingers of the housing/shielding unit are spring loaded to flex into position and couple to the bezel, and

the one or more backward fingers are spring loaded to flex into position and couple to one or more host tabs.

79. The fiber-optic module of claim 65 wherein,

at least one forward finger of the one or more forward fingers extends from a right side or a left side of the housing/shielding unit to couple to a backside surface of the bezel near the opening, and

at least one backward finger of the one or more backward fingers extends from a top side of the housing/shielding unit to couple to at least one host tab of the bezel.

80. The fiber-optic module of claim 65 wherein,

at least one forward finger of the one or more forward fingers extends from a right side or a left side of the housing/shielding unit to couple to a backside surface of the bezel near the opening, and

at least one backward finger of the one or more backward fingers extends from a bottom side of the housing/shielding unit to couple to at least one host tab of the bezel.

81. The fiber-optic module of claim 65 wherein,

at least a pair of forward fingers of the one or more forward fingers extend respectively from a right side and a left side of the housing/shielding unit to couple to a backside surface of the bezel near the opening, and

at least a pair of backward finger of the one or more backward fingers extend respectively from a top side and a bottom side of the housing/shielding unit to couple to a pair of host tabs of the bezel.

82. The fiber-optic module of claim 65 wherein,

at least a pair of backward fingers of the one or more backward fingers extend respectively from a right side and a left side of the housing/shielding unit to couple to a pair of host tabs of the bezel, and

at least one forward finger of the one or more forward fingers extends from a top side of the housing/shielding unit to couple to a backside surface of the bezel near the opening.

83. The fiber-optic module of claim 65 wherein,

at least a pair of backward fingers of the one or more backward fingers extend respectively from a right side and a left side of the housing/shielding unit to couple to a pair of host tabs of the bezel, and

at least a pair of forward fingers of the one or more forward fingers extend respectively from a top side and a bottom side of the housing/shielding unit to couple to a backside surface of the bezel near the opening.

84. The fiber-optic module of claim 65 wherein,

the bezel is a faceplate, a backplate, or a host panel of a host system.

85. A fiber-optic module comprising:

a chassis having a pair of optical connector receptacles at one end and a pair of walls coupled to a base at an opposite end, the pair of walls having slots on inside surfaces, the pair of optical connector receptacles having a rectangular opening along the width of the chassis, the base having one or more pin openings;

a printed circuit board coupled into the slots in the pair of walls of the chassis, the printed circuit board having one or more pins in the one or more pin openings in the base of the chassis, the printed circuit board having electrical components to process electrical signals of the one or more pins;

a pair of opto-electronic components having pins coupled to traces of the printed circuit board at an edge, the traces coupled to at least one of the one or more pins and the electrical components of the printed circuit board, the pair of opto-electronic components to process electrical and optical signals;

a pair of optical connectors each having an optical port with a lens, a flange, a snap lock clip, a ferrule barrel, and a recess between the optical port and the flange, the pair of optical ports of the pair of optical connectors coupled to the pair of opto-electronic components respectively at one end and each of the snap lock clip and the ferrule barrel inserted into the respective pair of optical connector receptacles of the chassis at an opposite end;

a plate having a pair of u-shaped openings and a flap, the plate inserted into the rectangular opening of the chassis, the u-shaped openings of the plate engaging the recess between the optical port and the flange in each pair of the optical connectors to hold the pair of opto-electronic components and the pair of optical connectors to the chassis;

a first portion of a shielded housing around the chassis coupled to the plate, the first portion of the shielded housing to protect the pair of opto-electronic components and the electrical components; and

a second portion of the shielded housing around the chassis coupled to the first portion, the second portion of the shielded housing having one or more forward fingers and one or more backward fingers to couple to a panel.

86. The fiber-optic module of claim 85 wherein,

the panel is a bezel, a faceplate, a backplate, or a host panel of a host system.

87. The fiber-optic module of claim 85 wherein,

the first portion of the shielded housing couples to the plate to electrically couple the plate and the first portion and the second portion of the shielded housing together.

88. The fiber-optic module of claim 85 wherein,

the second portion of the shielded housing couples to the plate to electrically couple the plate and the first portion and the second portion of the shielded housing together.

89. The fiber-optic module of claim 85 further comprising:

a pair of collars respectively around the pair optical ports of the pair of optical connectors, the pair of collars coupled to the plate, the pair of collars to shield the pair of opto-electronic devices.

90. A fiber-optic module comprising:

a module chassis frame having optical, electrical, and opto-electronic components affixed therein, the optical, electrical, and opto-electronic components to process optical and electrical signals; and

a housing/shielding unit around the module chassis frame, the housing/shielding unit having a frontal opening to accept a fiber-optic cable connector, the housing/shielding unit is conductive and has one or more forward fingers and one or more backward fingers near an edge of the frontal opening to ground the housing/shielding unit and to provide an electromagnetic interference (EMI) seal around an opening in a bezel, the one or more forward fingers to couple to a backside surface of the bezel near the opening, and the one or more backward fingers to couple to one or more host tabs of the bezel.