US20010001270A1 - Fiber optic module - Google Patents
Fiber optic module Download PDFInfo
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- US20010001270A1 US20010001270A1 US09/756,441 US75644101A US2001001270A1 US 20010001270 A1 US20010001270 A1 US 20010001270A1 US 75644101 A US75644101 A US 75644101A US 2001001270 A1 US2001001270 A1 US 2001001270A1
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- 230000000007 visual effect Effects 0.000 claims abstract description 34
- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 239000013307 optical fiber Substances 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4453—Cassettes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4452—Distribution frames
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4452—Distribution frames
- G02B6/44526—Panels or rackmounts covering a whole width of the frame or rack
Definitions
- the present invention relates to fiber optic modules for use in cross-connecting fiber optic equipment.
- Fiber optic peripheral equipment for cable management, cable storage and connection capabilities are well known.
- the use of modular fiber optic connector modules is known for performing so-called cross-connect applications.
- U.S. Pat. Nos. 5,432,875 and 5,363,465 to ADC Telecommunications, Inc. concern fiber optic connector modules and chassis designs for receiving the modules in cross-connect applications.
- PCT WO97/41720 also concerns a fiber optic module for use in cross-connect applications.
- the document discloses optical signal routing, monitoring, and visual path identification capabilities.
- a fiber optic module for mounting to a chassis for holding one or more modules has front and rear access defined by a plurality of connection locations. The connection locations are linked by optical couplers. Two circuits are disposed within the housing of the module. The module is used to cross-connect fiber optic equipment via patch cords on the front connection locations.
- the front of the module includes four adapters for connection to fiber optic connectors, and two visual indicators for visual path identification for the circuits.
- the front may also include visual signal identification input ports.
- the rear includes eight adapters for connection to fiber optic connectors.
- the rear of the module may include angled linear segments for the connection locations.
- the front may include adapters in a linear array, each held at an angle to the front of the module by an angled retainer.
- the visual indicators may include a lens cap at least partially transparent to visual light connectable to an optical fiber. During injection of an optical signal through the fiber in the visible light range, the lens cap will illuminate.
- FIG. 1 shows a perspective view of a chassis including several fiber optic modules mounted within the chassis
- FIG. 1B is a rear view of the chassis and modules shown in FIG. 1A with the rear door open;
- FIG. 2 shows a perspective side view of one of the four port fiber optic modules
- FIG. 6 is a schematic circuit path drawing showing the exemplary signal paths for the main signals (solid) and for the visible continuity check and identifier signals (dashed);
- FIG. 8 shows only the circuit paths for the visible continuity check and identifier signals of the drawing of FIG. 6;
- FIG. 9 shows an adapter and retainer of the type along the front of the module
- FIG. 10 shows an adapter and retainer of the type along the rear of the module
- FIG. 11 shows a further view of the adapter and retainer of FIG. 10;
- FIG. 12 is a perspective view of the visual indicator for the signal identifier output device along the front of the module
- FIG. 13 is a cross-sectional side view of the signal identifier output device
- FIG. 14 is a cross-sectional view of the lens cap and the nut of the signal identifier output device
- FIG. 16 is an exploded view of the signal identifier output device
- FIG. 17 is a perspective view of a portion of the module housing.
- Chassis 20 is mountable to a rack (not shown) for holding chassis 20 .
- Chassis 20 includes an outer housing 24 , and a pivotable front door 26 .
- Front door 26 allows access to an interior of chassis 20 , so as to access individual modules 22 , 23 such as for repair or replacement of modules 22 , 23 or to connect or disconnect the modules with other modules or fiber optic equipment.
- Rear door 27 also pivots in a similar manner to allow access to the rear areas of modules 22 , 23 .
- Housing 24 includes a plurality of guides 28 for holding the individual modules 22 , 23 in a horizontal manner. Side openings 29 allow for cable pathways into and out of chassis 20 .
- module housing 32 One construction of module housing 32 is to form front face 40 , major side 50 , and minor sides 52 , 54 from a single main piece 80 (see FIG. 17), such as from sheet metal.
- the attachment of parts can be by fasteners, such as screws.
- Module 22 includes a plurality of first adapters 60 exposed along front face 40 for the front connection locations for connection to fiber optic connectors.
- a plurality of second adapters 62 are positioned along rear face 42 for the rear connection locations, also for connection to fiber optic connectors.
- the first and second adapters 60 , 62 are preferably positioned in linear arrays parallel to front face 40 .
- the adapters shown are FC type, but could also be SC, ST, or any other suitable connection scheme.
- the plurality of first adapters 60 are used to cross-connect fiber optic equipment connected to the plurality of rear adapters 62 of module 22 . Alternatively, the equipment may be connected to the rear adapters 62 module 22 and to another module. The two modules are cross-connected to connect the equipment in this situation.
- Front face 40 of module 22 also includes two visual indicators 64 , 66 connected to the optical components within module 22 , as will be described in greater detail below. Alternatively, module 22 can be interconnected to other equipment or another module via front adapters 60 .
- Front adapters 60 define receive and transmit ports for two passive optical circuits contained within module 22 .
- rear adapters 62 are connected to fiber optic equipment to be cross-connected at the front adapters 60 through patch cords.
- the two circuits each allow optical signal routing, monitoring and signal path identification.
- Module 22 of one preferred embodiment fits into existing chassis 20 having individual module opening widths of about 7.237 inches, and heights of about 1.100 inches. Holes 30 are positioned about 7.905 inches apart. Module 22 of one preferred embodiment has a length between sides 52 , 54 of about 7.11 inches, a length between the outside edges of side extensions 56 of about 7.96 inches, a length between sides 48 , 50 of about 1.06 inches, and a length of front face 40 including flanges 68 , 70 of about 8.61 inches. Module 22 with two independent circuits has double the density over a module 22 having only a single circuit.
- Module 22 includes two plugs 88 which fill unused holes in front face 40 in module 22 .
- adapters 60 are positioned in front face 40 (see FIG. 1A) where the plugs are in module 22 in a similar manner as the other adapters 60 , for connection to a fiber optic connector.
- two adapters 60 define a first transmit output port 100 and a first receive input port 102 as part of a first circuit 90 .
- Adapters 60 further define a second transmit output port 106 , and a receive input port 108 as part of a second circuit 92 .
- a first LED 104 defines first visual indicator 64 and is linked to first circuit 90 for circuit continuity checking and identification.
- a second LED 110 defines second visual indicator 66 and is linked to second circuit 92 for circuit continuity checking and identification.
- FIGS. 6 - 8 are schematics which show the circuit paths during use of module 22 where first circuit 90 is cross-connected to second circuit 92 with patch cords 94 , 96 .
- Each of first and second circuits 90 , 92 are also cross-connectable to circuits of other modules.
- Each of circuits 90 , 92 are inter-connectable to other modules or equipment.
- Adapters 62 define various ports for first and second circuits 90 , 92 . Specifically, a first transmit input port 120 and a first receive output port 122 are linked to first circuit front ports 100 , 102 through optical couplers within module 22 . Also, a second transmit input port 124 and a second receive output port 126 are linked to second circuit front ports 106 , 108 through optical couplers. A first transmit monitor port 128 and a first receive monitor port 130 are part of first circuit 90 , and are positioned along rear face 42 . A second transmit monitor port 132 and a second receive monitor port 134 are part of second circuit 92 , and are also positioned along rear face 42 .
- Receive monitor port 130 also is utilized as an identification input port for injecting a signal into first circuit 90 to trace a circuit path through module 22 to another circuit in module 22 or to another module altogether.
- receive monitor port 130 is shown separate from identification input port 136 . This is the case for six port module 23 .
- the two ports 130 , 136 are combined and share the same connector location. This requires an operator to selectively use the combined port as either a monitor or a visual indicator for continuity checking.
- a first optical coupler 140 such as a two-by-two splitter, links transmit input port 120 to transmit output port 100 and transmit monitor port 128 , each receiving a portion of the signal, such as 50%.
- a second optical coupler 142 such as a one-by-two splitter links receive input port 108 to receive output port 126 and receive monitor port 134 , each receiving a portion of the signal, such as 50%.
- Third and fourth optical couplers 144 and 146 are similarly configured for splitting of the signals from an input port between the respective output and monitor ports. Each of couplers 140 , 142 , 144 , 146 allow the identification signal to pass in the reverse direction to the main signal.
- a further optical coupler is provided in first circuit 90 .
- a secondary coupler 160 such as a 1 ⁇ 2 splitter, is provided where monitor port 130 receives about 95% of the signal, and the remaining about 5% is received by the input port 136 .
- a similar construction is provided for secondary coupler 162 of second circuit 92 .
- couplers 160 , 162 allow the identification signal to pass in the reverse direction to the main signal.
- adapter 60 is shown in greater detail with a retainer 200 for holding adapter 60 in an opening 202 (see FIG. 18) of module housing 32 .
- Retainer 200 holds adapter 60 at a non-perpendicular angle relative to the axis of opening 202 .
- Retainer 200 snaps into opening 202 .
- Retainer 200 is also removable, as desired.
- U.S. Pat. No. 5,214,735 to ADC Telecommunications, Inc. shows and describes an example retainer 200 .
- Other retainers are possible for mounting adapters 60 to module 22 . Once mounted, end 205 of adapter 60 is exposed for connection to a connector of a fiber optic patch cord, shown schematically in FIGS. 6 - 8 as cords 94 , 96 .
- adapter 62 is shown in greater detail with a retainer 208 for holding adapter 62 in one of the openings 210 along rear face 42 of module housing 32 (see FIG. 18). Retainer 208 snaps into opening 200 , and is removable as desired.
- Adapter 62 is shown with protective caps 204 . Other retainers are possible for mounting adapters 62 to module 22 . Once mounted, end 207 is exposed for connection to a connector of a fiber optic cable.
- adapters 60 , 62 include protective end caps 204 , which are removed prior to connection to a connector.
- Adapters 60 , 62 also allow connection at opposite ends 206 , 209 to FC type connectors so as to connect easily to the optical couplers within module 22 . Other connector types can be used, as desired.
- first LED 104 is shown in greater detail.
- Second LED 110 is constructed in a similar manner. Each LED includes a lens portion optically linked to a fiber connected to the main circuits to provide a continuity check for each circuit.
- a lens cap 300 is held by a nut 302 to an outer sleeve 306 .
- Lens cap 300 is made from a material at least partially transparent to visible light.
- An integrally molded lens cap 300 and nut 302 is also possible.
- An inner ferrule 304 held to outer sleeve 306 such as adhesive, holds an optical fiber 310 such that an end of the fiber is adjacent to cap 300 .
- An outer boot 308 provides strain relief for outer sleeve 306 .
- Nut 302 includes threads 320 which threadably mount to threads 322 of outer sleeve 306 .
- Cap 300 includes a plurality of flexible legs 324 which enable positioning of a recessed region 326 disposed on an outer surface of cap 300 around a shoulder 330 of nut 302 . Such a construction allows retention of cap 300 with nut 302 .
- front face 40 of module housing 32 is trapped between end 331 of nut 302 and shoulder 332 of outer sleeve 306 .
- visible light is passed through fiber 310 , the light illuminates lens cap 300 providing a visual indicator to the operator.
- lens cap 300 and the remaining components necessary to attach it to a fiber can be molded from plastic, such as a one-piece molded part.
Abstract
Description
- 1. The present invention relates to fiber optic modules for use in cross-connecting fiber optic equipment.
- 2. The telecommunications and data transmission industries are rapidly expanding their development of fiber optic transmission systems. Historically, telecommunications signals and data have been transmitted over wire lines such as twisted pair or coaxial cables. In order to accommodate higher signal rate speeds, the industry is turning to increased use of fiber optic cables as the transmission medium.
- 3. As the use of fiber optic cables increases, the need for peripheral equipment has increased. For example, it is desirable to have access to a fiber optic line for the purpose of either re-routing the line in the event of damage to the line or to have access to the line for purposes of monitoring or testing the line.
- 4. Fiber optic peripheral equipment for cable management, cable storage and connection capabilities are well known. The use of modular fiber optic connector modules is known for performing so-called cross-connect applications. U.S. Pat. Nos. 5,432,875 and 5,363,465 to ADC Telecommunications, Inc. concern fiber optic connector modules and chassis designs for receiving the modules in cross-connect applications.
- 5. PCT WO97/41720 also concerns a fiber optic module for use in cross-connect applications. The document discloses optical signal routing, monitoring, and visual path identification capabilities.
- 6. There is a continuing need for fiber optic modules which provide optical signal routing, monitoring, and visual path identification capabilities.
- 7. A fiber optic module for mounting to a chassis for holding one or more modules has front and rear access defined by a plurality of connection locations. The connection locations are linked by optical couplers. Two circuits are disposed within the housing of the module. The module is used to cross-connect fiber optic equipment via patch cords on the front connection locations.
- 8. In one preferred embodiment, the front of the module includes four adapters for connection to fiber optic connectors, and two visual indicators for visual path identification for the circuits. The front may also include visual signal identification input ports. The rear includes eight adapters for connection to fiber optic connectors.
- 9. The rear of the module may include angled linear segments for the connection locations. The front may include adapters in a linear array, each held at an angle to the front of the module by an angled retainer.
- 10. The visual indicators may include a lens cap at least partially transparent to visual light connectable to an optical fiber. During injection of an optical signal through the fiber in the visible light range, the lens cap will illuminate.
- 11. In the drawings, wherein like reference letters and numerals indicate corresponding elements throughout the several views:
- 12.FIG. 1 shows a perspective view of a chassis including several fiber optic modules mounted within the chassis;
- 13.FIG. 1A is a front view of the chassis with the front door open, and showing two four port fiber optic modules, and two six port fiber optic modules mounted to the chassis;
- 14.FIG. 1B is a rear view of the chassis and modules shown in FIG. 1A with the rear door open;
- 15.FIG. 2 shows a perspective side view of one of the four port fiber optic modules;
- 16.FIG. 3 is a top view of the module of FIG. 2;
- 17.FIG. 4 is a front view of the module of FIG. 2;
- 18.FIG. 5 is a rear view of the module of FIG. 2;
- 19.FIG. 6 is a schematic circuit path drawing showing the exemplary signal paths for the main signals (solid) and for the visible continuity check and identifier signals (dashed);
- 20.FIG. 7 shows only the circuit paths for the main signals of the circuit drawing of FIG. 6;
- 21.FIG. 8 shows only the circuit paths for the visible continuity check and identifier signals of the drawing of FIG. 6;
- 22.FIG. 9 shows an adapter and retainer of the type along the front of the module;
- 23.FIG. 10 shows an adapter and retainer of the type along the rear of the module;
- 24.FIG. 11 shows a further view of the adapter and retainer of FIG. 10;
- 25.FIG. 12 is a perspective view of the visual indicator for the signal identifier output device along the front of the module;
- 26.FIG. 13 is a cross-sectional side view of the signal identifier output device;
- 27.FIG. 14 is a cross-sectional view of the lens cap and the nut of the signal identifier output device;
- 28.FIG. 15 is a cross-sectional side view of the sleeve and the ferrule of the signal identifier output device;
- 29.FIG. 16 is an exploded view of the signal identifier output device;
- 30.FIG. 17 is a perspective view of a portion of the module housing; and
- 31.FIG. 18 is a perspective view of a further portion of the module housing.
- 32. Referring now to FIGS. 1, 1A and 1B, a
fiber optic chassis 20 is shown for holding a plurality of thefiber optic modules Chassis 20 is mountable to a rack (not shown) for holdingchassis 20.Chassis 20 includes anouter housing 24, and a pivotablefront door 26.Front door 26 allows access to an interior ofchassis 20, so as to accessindividual modules modules Rear door 27 also pivots in a similar manner to allow access to the rear areas ofmodules Housing 24 includes a plurality ofguides 28 for holding theindividual modules Side openings 29 allow for cable pathways into and out ofchassis 20. - 33.
Modules 22 have four connection locations or ports along the front, andmodules 23 have six connection locations or ports along the front. As will be described in greater detail below,modules modules modules - 34. Both
modules module 22 and on the front formodule 23. - 35. Referring now to FIGS. 2-5,
module 22 has a module housing 32 including afront face 40, and a generally opposite facingrear face 42. The front and rear faces 40, 42 each defineconnection locations module 22 to fiber optic cables. In the embodiment shown,front face 40 is generally planar, andrear face 42 generally includes at least one angled, linear segment, and preferably two angled,linear segments 44. The angled segments allow formore connection locations 62 than would be possible with a planarrear face 42 parallel tofront face 40. In the embodiment shown, eight connection locations are defined onrear face 42, four persegment 44. In the embodiment shown, theconnection locations front face 40. - 36.
Module 22 further includes opposed majorplanar sides 48, 50.Major sides 48, 50 define a top and a bottom in the illustrated embodiment formodule 22.Module 22 further includes opposed minorplanar sides module 22 in the embodiment shown.Major side 48 hasside extensions 56 which form slide rails 56 for receipt inguides 28 ofchassis housing 24.Module 22 is mounted in either orientation as shown in FIGS. 1, 1A, and 1B. Whenmodules 22 are flipped between the left and right sides, angled connection locations on the front and the rear are directed to respective left and right sides ofchassis 20 as shown. Also,module 22 can be mounted vertically if desired. - 37. One construction of module housing 32 is to form
front face 40, major side 50, andminor sides main piece 80 to form the housing for the optical couplers and adapters which permits connection to optical equipment. The attachment of parts can be by fasteners, such as screws. - 38.
Module 22 includes a plurality offirst adapters 60 exposed alongfront face 40 for the front connection locations for connection to fiber optic connectors. A plurality ofsecond adapters 62 are positioned alongrear face 42 for the rear connection locations, also for connection to fiber optic connectors. The first andsecond adapters front face 40. The adapters shown are FC type, but could also be SC, ST, or any other suitable connection scheme. The plurality offirst adapters 60 are used to cross-connect fiber optic equipment connected to the plurality ofrear adapters 62 ofmodule 22. Alternatively, the equipment may be connected to therear adapters 62module 22 and to another module. The two modules are cross-connected to connect the equipment in this situation.Front face 40 ofmodule 22 also includes twovisual indicators module 22, as will be described in greater detail below. Alternatively,module 22 can be interconnected to other equipment or another module viafront adapters 60. - 39.
Module 22 further includesend flanges module 22 tochassis 20. Lockingmembers 72 releasably holdflanges holes 30 ofhousing 24 ofchassis 20. Lockingmembers 72 are of the type shown and described in U.S. Pat. No. 5,363,465. Lockingmembers 72 operate to lock or release by rotating 90 degrees. Other locking members, including screws may be used as desired. - 40.
Front adapters 60 define receive and transmit ports for two passive optical circuits contained withinmodule 22. In a cross-connect application,rear adapters 62 are connected to fiber optic equipment to be cross-connected at thefront adapters 60 through patch cords. The two circuits each allow optical signal routing, monitoring and signal path identification. - 41.
Module 22 of one preferred embodiment fits into existingchassis 20 having individual module opening widths of about 7.237 inches, and heights of about 1.100 inches.Holes 30 are positioned about 7.905 inches apart.Module 22 of one preferred embodiment has a length betweensides side extensions 56 of about 7.96 inches, a length betweensides 48, 50 of about 1.06 inches, and a length offront face 40 includingflanges Module 22 with two independent circuits has double the density over amodule 22 having only a single circuit. - 42.
Module 22 includes twoplugs 88 which fill unused holes infront face 40 inmodule 22. Inmodule 23,adapters 60 are positioned in front face 40 (see FIG. 1A) where the plugs are inmodule 22 in a similar manner as theother adapters 60, for connection to a fiber optic connector. - 43. FIGS. 6-8 illustrate the circuit paths through
modules - 44. Referring now to FIGS. 4 and 6, along the front of
module 22, twoadapters 60 define a first transmitoutput port 100 and a first receiveinput port 102 as part of afirst circuit 90.Adapters 60 further define a second transmitoutput port 106, and a receiveinput port 108 as part of asecond circuit 92. Afirst LED 104 defines firstvisual indicator 64 and is linked tofirst circuit 90 for circuit continuity checking and identification. Asecond LED 110 defines secondvisual indicator 66 and is linked tosecond circuit 92 for circuit continuity checking and identification. FIGS. 6-8 are schematics which show the circuit paths during use ofmodule 22 wherefirst circuit 90 is cross-connected tosecond circuit 92 withpatch cords second circuits circuits - 45.
Adapters 62 define various ports for first andsecond circuits input port 120 and a first receiveoutput port 122 are linked to firstcircuit front ports module 22. Also, a second transmitinput port 124 and a second receiveoutput port 126 are linked to secondcircuit front ports monitor port 128 and a first receivemonitor port 130 are part offirst circuit 90, and are positioned alongrear face 42. A second transmitmonitor port 132 and a second receivemonitor port 134 are part ofsecond circuit 92, and are also positioned alongrear face 42. - 46. Receive
monitor port 130 also is utilized as an identification input port for injecting a signal intofirst circuit 90 to trace a circuit path throughmodule 22 to another circuit inmodule 22 or to another module altogether. - 47. In FIG. 6, receive
monitor port 130 is shown separate fromidentification input port 136. This is the case for sixport module 23. For fourport module 22, the twoports - 48. Receive
monitor port 134 is also utilized as an identification input port for injecting a signal intosecond circuit 92 to trace a circuit path throughmodule 22 to another circuit inmodule 22 or to another module altogether. - 49. In FIG. 6, receive
monitor port 134 is shown separate fromidentification input port 138. As above forports ports module 23. Formodule 22, they are the same connection location. - 50. A first
optical coupler 140, such as a two-by-two splitter, links transmitinput port 120 to transmitoutput port 100 and transmitmonitor port 128, each receiving a portion of the signal, such as 50%. A secondoptical coupler 142, such as a one-by-two splitter links receiveinput port 108 to receiveoutput port 126 and receivemonitor port 134, each receiving a portion of the signal, such as 50%. Third and fourthoptical couplers couplers - 51. If separate ports are desired for the receive signal monitor function and the identification signal input function, a further optical coupler is provided. In
first circuit 90, asecondary coupler 160, such as a 1×2 splitter, is provided wheremonitor port 130 receives about 95% of the signal, and the remaining about 5% is received by theinput port 136. A similar construction is provided for secondary coupler 162 ofsecond circuit 92. Each ofcouplers 160, 162 allow the identification signal to pass in the reverse direction to the main signal. - 52. Referring now to FIG. 9,
adapter 60 is shown in greater detail with aretainer 200 for holdingadapter 60 in an opening 202 (see FIG. 18) of module housing 32.Retainer 200 holdsadapter 60 at a non-perpendicular angle relative to the axis ofopening 202.Retainer 200 snaps intoopening 202.Retainer 200 is also removable, as desired. U.S. Pat. No. 5,214,735 to ADC Telecommunications, Inc. shows and describes anexample retainer 200. Other retainers are possible for mountingadapters 60 tomodule 22. Once mounted, end 205 ofadapter 60 is exposed for connection to a connector of a fiber optic patch cord, shown schematically in FIGS. 6-8 ascords - 53. Referring now to FIGS. 10 and 11,
adapter 62 is shown in greater detail with aretainer 208 for holdingadapter 62 in one of theopenings 210 alongrear face 42 of module housing 32 (see FIG. 18).Retainer 208 snaps intoopening 200, and is removable as desired.Adapter 62 is shown withprotective caps 204. Other retainers are possible for mountingadapters 62 tomodule 22. Once mounted,end 207 is exposed for connection to a connector of a fiber optic cable. As illustrated,adapters protective end caps 204, which are removed prior to connection to a connector.Adapters module 22. Other connector types can be used, as desired. - 54. Referring now to FIGS. 13-16,
first LED 104 is shown in greater detail.Second LED 110 is constructed in a similar manner. Each LED includes a lens portion optically linked to a fiber connected to the main circuits to provide a continuity check for each circuit. Alens cap 300 is held by anut 302 to anouter sleeve 306.Lens cap 300 is made from a material at least partially transparent to visible light. An integrally moldedlens cap 300 andnut 302 is also possible. Aninner ferrule 304 held toouter sleeve 306, such as adhesive, holds anoptical fiber 310 such that an end of the fiber is adjacent to cap 300. Anouter boot 308 provides strain relief forouter sleeve 306.Nut 302 includesthreads 320 which threadably mount to threads 322 ofouter sleeve 306.Cap 300 includes a plurality offlexible legs 324 which enable positioning of a recessedregion 326 disposed on an outer surface ofcap 300 around ashoulder 330 ofnut 302. Such a construction allows retention ofcap 300 withnut 302. By threadingnut 302 toouter sleeve 306,front face 40 of module housing 32 is trapped betweenend 331 ofnut 302 andshoulder 332 ofouter sleeve 306. When visible light is passed throughfiber 310, the light illuminateslens cap 300 providing a visual indicator to the operator. In an alternative embodiment,lens cap 300 and the remaining components necessary to attach it to a fiber, can be molded from plastic, such as a one-piece molded part. - 55. Having described the present invention in a preferred embodiment, modifications and equivalents may occur to one skilled in the art. It is intended that such modifications and equivalents shall be included within the scope of the claims which are appended hereto.
Claims (19)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/756,441 US6307998B2 (en) | 1998-07-21 | 2001-01-08 | Fiber optic module including lens cap |
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Application Number | Priority Date | Filing Date | Title |
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US09/121,066 US6208796B1 (en) | 1998-07-21 | 1998-07-21 | Fiber optic module |
US09/756,441 US6307998B2 (en) | 1998-07-21 | 2001-01-08 | Fiber optic module including lens cap |
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US09/121,066 Division US6208796B1 (en) | 1998-07-21 | 1998-07-21 | Fiber optic module |
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US20010001270A1 true US20010001270A1 (en) | 2001-05-17 |
US6307998B2 US6307998B2 (en) | 2001-10-23 |
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US09/756,441 Expired - Lifetime US6307998B2 (en) | 1998-07-21 | 2001-01-08 | Fiber optic module including lens cap |
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US09/121,066 Expired - Lifetime US6208796B1 (en) | 1998-07-21 | 1998-07-21 | Fiber optic module |
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AT (1) | ATE292290T1 (en) |
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Cited By (65)
Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
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EP1112521A2 (en) | 2001-07-04 |
ATE292290T1 (en) | 2005-04-15 |
EP1557706A1 (en) | 2005-07-27 |
TW440729B (en) | 2001-06-16 |
AU5770199A (en) | 2000-02-14 |
WO2000005611A9 (en) | 2000-07-27 |
AU757051B2 (en) | 2003-01-30 |
US6307998B2 (en) | 2001-10-23 |
US6208796B1 (en) | 2001-03-27 |
DE69924507D1 (en) | 2005-05-04 |
WO2000005611A3 (en) | 2000-06-15 |
CA2338045A1 (en) | 2000-02-03 |
BR9912280A (en) | 2001-04-17 |
WO2000005611A2 (en) | 2000-02-03 |
DE69924507T2 (en) | 2006-02-09 |
EP1112521B1 (en) | 2005-03-30 |
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