WO2001094997A2 - Low loss fiber optic jumper with electronic presence detection - Google Patents
Low loss fiber optic jumper with electronic presence detection Download PDFInfo
- Publication number
- WO2001094997A2 WO2001094997A2 PCT/US2001/017828 US0117828W WO0194997A2 WO 2001094997 A2 WO2001094997 A2 WO 2001094997A2 US 0117828 W US0117828 W US 0117828W WO 0194997 A2 WO0194997 A2 WO 0194997A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- connector
- jumper
- fiber optic
- ports
- Prior art date
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 83
- 238000001514 detection method Methods 0.000 title description 4
- 230000003287 optical effect Effects 0.000 claims abstract description 115
- 230000005355 Hall effect Effects 0.000 claims abstract description 18
- 239000013307 optical fiber Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 7
- 230000037431 insertion Effects 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- 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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3826—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres characterised by form or shape
- G02B6/3827—Wrap-back connectors, i.e. containing a fibre having an U shape
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/2931—Diffractive element operating in reflection
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
- G02B6/29382—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM including at least adding or dropping a signal, i.e. passing the majority of signals
- G02B6/29383—Adding and dropping
-
- 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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
-
- 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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3895—Dismountable connectors, i.e. comprising plugs identification of connection, e.g. right plug to the right socket or full engagement of the mating parts
-
- 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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3897—Connectors fixed to housings, casing, frames or circuit boards
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/0206—Express channels arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0215—Architecture aspects
- H04J14/0217—Multi-degree architectures, e.g. having a connection degree greater than two
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
Definitions
- This invention relates generally to a fiber optic network. More particularly the invention relates to a fiber channel jumper that may connect two fiber optic system common wavelength fibers or may be used to add or drop common wavelengths into open fiber connections.
- an OAD Optical Add Drop
- an OAD is basically two wavelength division multiplexing (WDM) devices capable , of multiplexing and de-multiplexing multiple channels or wavelengths of light.
- WDM wavelength division multiplexing
- a plurality of individual fibers are provided wherein each individual fiber communicates a particular wavelength or channel of light and another individual fiber communicates a polychromatic light signal comprising the particular wavelengths communicated by the plurality of individual fibers.
- a major function of the OAD is to pass thru or express selected individual fiber channels connected to an OAD system element. Expressing is therefore accomplished by selectively placing jumpers between the mux/demux and demux/mux devices within the OAD.
- OAD systems utilize optical jumpers that have high insertion loss, which may exceed l-3dB.
- Typical connectors that have been used may be generally classified into five major categories, including resilient ferrule, rigid ferrule, grooved plate hybrids, expanded beam and rotary.
- Desirable attributes of a jumper component include ease of installation and the ability to provide low optical power loss with a single mode fiber optic cable.
- One type of typical related art fiber optic jumpers is a jumper having a "duplex" configuration.
- a disadvantage and problem of a "duplex" configuration is that such a configuration imposes a tight bend radius on single mode fibers. The tight bend radius creates excessive fiber optic power loss.
- fiber optic jumpers may be utilized. Low optic loss can be achieved by mechanically positioning the jumper at a 1 inch pitch rather than the standard duplex inch pitch, which commonly found in the art. Additionally, low optic loss can be achieved by controlling the fiber loop radius.
- the physical presence of a fiber optic jumper in an optical add/drop device allows for connection of two fiber optic system common wavelength fibers.
- the fiber optic jumper of the invention has a casing. A first end of an optical fiber and a second end of the optical fiber extend out of a connector end of the casing.
- the retraction of the jumper from the OAD exposes fiber optic connections in the OAD and enables a system reconfiguration such as adding or dropping of common wavelengths into open fiber connections.
- An installed fully bi-directional jumper redirects light within an optical transport system.
- a bidirectional jumper allows for an additional layer of fiber optic network monitoring intelligence to what is commonly a passive fiber optic transport system.
- a presence detection device is a physical switch, which is either active or passive and which is activated upon insertion of the jumper.
- Several types of presence switches may be used including: 1) a silicone pushbutton utilizing a conductive pad; 2) a metal or polyester dome switch construction; 3) an infrared transmitter and receiver; 4) a magneto- resistive device, such as a magnetic Hall effect sensor; or other types of presences switches.
- a magnet is provided in the chassis of the jumper to engage a Hall effect sensor feature contained on the OAD product chassis to facilitate monitoring of the insertion or withdrawal of the fiber channel jumper.
- the magnetic Hall effect sensor is preferred because the components may be designed as a sealed construction non tactile interface, which greatly increases the reliability of the presence switch.
- Figure 1 is a schematic diagram of a fiber optic network utilizing the fiber optic jumper of the invention
- Figure 2 is a front perspective view of the optical add/drop of Figure 1;
- Figure 3 is a rear perspective view of the optical add/drop of Figure 1;
- Figure 4 is a plan view of two uninstalled wavelength division multiplexer (WDM) modules visible in Figures 1-3;
- Figure 5 is an elevational front view of the optical add/drop of Figures 1-3 having a plurality of jumpers installed therein;
- WDM wavelength division multiplexer
- Figure 6a is an elevational view of the optic jumper of Figure 5;
- Figure 6b is an elevational side view of the optic jumper of Figure 5;
- Figure 6c is an elevational end view of the optic jumper of Figure 5;
- Figure 7 is a plan view of an optic fiber loop used within the jumper of Figures 5 - 6c;
- Figure 8a is a cutaway perspective view of an embodiment of an optical add/drop device having presence indicators
- Figure 8b is a schematic diagram of an LED panel controller
- Figure 9 is a plot of optical power loss versus wavelength for various bend diameters of fiber optic cable; and Figure 10 is a plot using best fit lines through the data of Figure 9 to simulate data showing optical loss versus bend radius .
- An optical add/drop device is used to add, drop and route a plurality of optical signals from various wavelength division multiplexers.
- Modern wavelength division multiplexers are capable of transmitting a plurality, e.g. 49, signals over a single polychromatic fiber optic cable. Each of the signals are typically broken out into separate monochromatic optical signals.
- a monochromatic optical signal is defined as a narrowband optical signal.
- Each of the monochromatic optical signals are typically routed to a port in an optical add/drop device where the signal is then routed to a desired location. Oftentimes, the signal will be routed to an adjacent port that communicates with a second wavelength division multiplexer within the optical add/drop device. Alternatively, the monochromatic signal may be routed to a separate optical add/drop device. Regardless, the profusion of fiber optical cables from the optical add/drop device is disorderly. Further, short lengths of fiber optic cables used to connect adjacent ports may be bent at a tight radius, which may lead to unacceptable losses in the strength of the signal.
- FIG. 1 is a block diagram of a fiber optic network 100 in accordance with an embodiment of the present invention.
- the fiber optic network 100 provides optical communication between end points 105a, 105b, and 105c.
- Each end point 105a, 105b, and 105c may be optically coupled to a wavelength division multiplexer (WDM) 106a, 106b, and 106c, respectively.
- WDM wavelength division multiplexer
- Each end point 105a and 105c communicates a multiple number of monochromatic optical signals via fiber optic lines 112a-112n to the associated WDM 106a-106c, respectively.
- the end point 105b communicates a multiple number of monochromatic optical signals via fiber optic lines 113a-113d to/from WDM 106b, which wavelength division multiplexes the signals from monochromatic optical lines 113a-113d to WDM 115 along fiber optic line 116.
- the OAD device 118 is, in general terms, a simple form of a wavelength router with two types of input/output (I/O) ports: Monochromatic I/O ports 123a, 123b and polychromatic ports 125. Monochromatic I/O ports 123a and 123b are used to pass through, add/drop, or disable monochromatic optical signals depending upon whether a jumper 135, fiber optic lines 114 or no connection is made with monochromatic I/O ports 123a and 123b. Additionally, a switchable jumper 135a may be inserted into a first port that is in communication with a first WDM 130a. The switchable jumper 135a may selectively communicate with a plurality of other ports for selectively routing a signal. For example, as shown in Figure 1, switchable jumper 135a may route signals from WDM 130a to either WDM 130b or WDM 115.
- I/O input/output
- OAD 118 has a housing 126 ( Figures 2 and 3) .
- a plurality of pairs of rows of I/O ports 123a x to 123a n and 123b ! to 123b n are shown, wherein upper I/O ports are designated by the numerals 123a ! and 123a n and lower ports are designated by the numerals 123b ! and 123b n .
- a pair of WDM's 130a-130b ( Figures 1-3) are utilized to de-mux or separate a received polychromatic optical signal into a plurality of monochromatic optical signals and mux or combine selected mono-chromatic signals into a polychromatic optical signal for communicating the resulting polychromatic optical signal to end point 105b, via fiber optic lines 114, or switchable jumper 135a which communicate with the WDM 115.
- Exemplary WDM's 130a and 130b are shown in greater detail in Figure 4.
- WDM 130a and WDM 130b each has an input/output end 131a, 131b, respectively, and a diffraction grating end 132a and 132b, respectively.
- a plurality of fiber optic lines 133a, 133b extend from a respective input/output end 131a, 131b ( Figure 4, not shown in Figures 2 & 3) .
- fiber optic lines 133a, 133b include forty-nine monochromatic lines and a single polychromatic line, although other combinations are possible.
- Each fiber optic line 133a, 133b terminates at optical connectors 134a, 134b ( Figure 4) .
- WDM 130a and WDM 130b may be selectively linked by an optical jumper 135 ( Figures 1, 5 - 8) as explained below.
- Each optical connector 134a that is affixed to a fiber optic line 133a emanating from WDM 130a preferably communicates with one of a pair of ports, e.g. upper ports 123a ! and 123a n ( Figures 2 and 5) .
- a single pair of ports, i.e., upper port 123a and lower port 123b facilitates transfer of data of a selected monochromatic frequency or of polychromatic data from WDM 130a to WDM 130b.
- a selected monochromatic frequency or polychromatic data may be referred to generally as data types.
- an optical jumper 135 is positioned in a selected one of ports 123a and ports 123b to communicate a selected data type with port 123a and port 123b.
- Figure 5 shows a plurality of optical jumpers 135 installed on OAD 118. Each optical jumper 135 communicates a single upper port 123a with a single lower port 123b for transmitting a selected data type.
- an optical jumper that is capable of transmitting data from several of ports 123a ! to 123a n and 123b ⁇ to 123b n may also be utilized, for example a 4-connector jumper may be used.
- optical jumper 135 has a casing 138 having an exposed or grip end 140 ( Figure 6a, 6b) .
- Casing 138 is preferably a plastic enclosure that is designed to protect internal components of the optical jumper 135 from possible damage.
- exposed end 140 has a grip area 142 that is provided with a plurality of ridges composed of rubber or any other material to facilitate ease of gripping and insertion or removal of the optical jumper 135 within I/O ports 123a and 123b.
- Casing 138 of optical jumper 135 also has a connector end 144.
- a pair of connector prongs i.e., first connector prong 146 and second connector prong 148, protrude from connector end 144 of optical jumper 135.
- Optical jumper 135 preferably has a 1 inch pitch or distance between the connector prongs 146, 148.
- a magnet 149 is located within casing 138 between connector prongs 146 and 148. Magnet 149 has a magnetic field capable of engaging a hall effect electronic switch 136, discussed in greater detail in Figures 8a and 8b, below.
- connector prongs 146 and 148 are SC fiber connectors.
- Other possible optical connector types include SMA, ST, FDDI, ESCON, FC/PC, D4 , and Biconic, or others.
- First protrusion 150 and second protrusion 152 extend from first connector prong 146 and second connector prong 148, respectively.
- First connector prong 146 and second connector prong 148 extend from optical connectors 154 and 156 respectively ( Figure 7) .
- First connector prong 146 and second connector prong 148 are joined together by optical fiber 164.
- optical fiber 164 is a CorningTM SMF-28 with standard 3mm jacket.
- optical jumper 135 is compact. Dimensions of one embodiment of optical jumper 135 are as follows:
- a small Hall effect electrical component or sensor 136 ( Figure 8a) is located between each upper port 123a and lower port 123b on OAD 118.
- Hall effect electrical component 136 is mounted on an electrical circuit capable of providing an electrical switch function for the electrical presence indicating system.
- LED 137 ( Figures 8a and 8b) can be incorporated into the OAD 118 and electrically switched on or off by the Hall effect sensor 136 to provide an additional visible indication of the presence or removal of jumper or jumpers 135.
- Optical jumpers 135 are schematically shown affixed in place on OAD 118.
- Magnets 149 which are contained within optical jumpers 135, communicate with a Hall effect sensor 136 that is located on OAD 118 between each of the upper I/O ports 123a and lower I/O ports 123b of OAD 118.
- a preferred Hall effect sensor 136 may be obtained from Allegro Microsystems, Inc. P/N A3210ELH.
- a preferred magnet 149 is a 1/4 inch diameter by 1/4 inch long magnet that may be obtained from McMaster-Carr P/N 57295K73.
- magnet 149 and Hall effect sensor 136 are positioned such that they are spaced at a sensing distance of 0.5 inches apart, wherein "sensing distance” is defined as a straight line distance for the magnet 149 to the Hall effect sensor 136.
- Hall effect sensors 136 are connected to a serial input scan chain.
- Bus 171 communicates the input data from the Hall effect sensors 136 to microprocessor 172 for each of the sensors 136.
- Microprocessor 172 then signals LEDs 137 to illuminate via bus 173 if an optical jumper 135 is installed within the corresponding I/O ports 123a and 123b.
- OAD 118 is designed to receive 49 optical jumpers 135.
- 49 Hall effect electronic components 136 are provided for sensing the presence of the 49 optical jumpers 135.
- other numbers of optical jumpers 135 and Hall effect components 136 may be used.
- the end point 105a may be located in Boston, the end point 105b may be located in Hartford, and the end point 105c may be located in New York City.
- a network service provider in Boston receives communication signals from local towns or cities via a communication system, such as a standard telephone network.
- the communication signals which are destined to locations south of Boston (end point 105a) , such as Hartford (end point 105b) and New York City (end point 105c) , are time-division multiplexed onto monochromatic optical signals and delivered to the WDM 106a.
- the WDM 106a performs a wave division multiplexing operation on the monochromatic optical signals and the resulting polychromatic optical signal is transmitted onto the fiber optic network 100 via the fiber optic line 122a.
- the polychromatic optical signal Upon the polychromatic optical signal reaching a network service provider between Boston (end point 105a) and Hartford (end point 105b) at add/drop device 118, the polychromatic optical signal is demultiplexed by the WDM 130a in the wavelength add/drop device 118.
- the polychromatic signal will enter the WDM 130a on one of fiber optic lines 133a ( Figure 4) that are in communication with polychromatic I/O port 125 ( Figures 2 and 5) that is intended to carry the polychromatic optical signal and that receives the polychromatic optical signal from fiber optic line 122a.
- WDM 130a demuxes the polychromatic signal and transmits a plurality of monochromatic signals over fiber optic lines 133a ( Figure 4) , each of which communicate with a monochromatic I/O port, e.g. upper I/O port 123a in OAD 118 ( Figure 2) .
- the monochromatic signal then passes through first connector prong 146 ( Figures 6a - 6c) of optical jumper 135 ( Figures 1, 5 - 6c), through optical fiber 164 ( Figure 7), and through second connector prong 148 ( Figure 6a-6c) .
- Second connector prong 148 communicates with the other I/O port, e.g. lower I/O port 123b ( Figure 2), which communicates with a selected fiber optic line 133b ( Figure 4) for receiving the monochromatic signal.
- the monochromatic signal is then transmitted via fiber optic line 133b to WDM 130b for remultiplexing.
- the multiplexed signal is then transmitted over a selected fiber optic line 133b that is in communication with polychromatic port 125 and communicates with fiber optic line 122c ( Figure 1) for transmission to New York City (end point 105c) .
- the monochromatic signals destined for Hartford may be routed by fiber optic lines 114 that communicate with other of selected lower I/O ports 123a or 123b for transmission to WDM 115 along with other monochromatic signals (having different wavelengths) for remultiplexing and delivery to the end point 105b in Hartford.
- local communication signals originating from Hartford may be added to either WDM 130a or 130b to be transmitted to either Boston (end point 105a) or New York City (end point 105c) , respectively, based upon the optical frequency that the communication signals are placed.
- demuxed monochromatic optical signals are transmitted over optical cables 114 from WDM 115 to either WDM 130a or 130b.
- the monochromatic optical signals are multiplexed by WDM 130b into a polychromatic optical signal and demultiplexed by WDM 106c in New York City (end point 105c) .
- the fiber optic lines e.g., 112a - n, 122a, c, 114, 116) are bidirectional such that optical communication can be performed in either direction.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002410937A CA2410937A1 (en) | 2000-06-02 | 2001-06-01 | Low loss fiber optic jumper with electronic presence detection |
AU2001275132A AU2001275132A1 (en) | 2000-06-02 | 2001-06-01 | Low loss fiber optic jumper with electronic presence detection |
EP01941807A EP1287394A2 (en) | 2000-06-02 | 2001-06-01 | Low loss fiber optic jumper with electronic presence detection |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20848000P | 2000-06-02 | 2000-06-02 | |
US60/208,480 | 2000-06-02 | ||
US09/724,803 US6859317B1 (en) | 2000-06-02 | 2000-11-28 | Diffraction grating for wavelength division multiplexing/demultiplexing devices |
US09/724,803 | 2000-11-28 | ||
US09/866,272 US6798965B2 (en) | 2000-06-02 | 2001-05-25 | Low loss fiber optic jumper with electronic presence detection |
US09/866,272 | 2001-05-25 |
Publications (2)
Publication Number | Publication Date |
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WO2001094997A2 true WO2001094997A2 (en) | 2001-12-13 |
WO2001094997A3 WO2001094997A3 (en) | 2002-04-25 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/017828 WO2001094997A2 (en) | 2000-06-02 | 2001-06-01 | Low loss fiber optic jumper with electronic presence detection |
Country Status (5)
Country | Link |
---|---|
US (1) | US6798965B2 (en) |
EP (1) | EP1287394A2 (en) |
AU (1) | AU2001275132A1 (en) |
CA (1) | CA2410937A1 (en) |
WO (1) | WO2001094997A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US7493044B2 (en) * | 2005-04-28 | 2009-02-17 | Corning Cable Systems, Llc | Methods and apparatus for transmitting data |
DE102005020235A1 (en) * | 2005-04-30 | 2006-09-28 | Audi Ag | Motor vehicle lighting system, has detection unit with light sensors, which are arranged within area of windscreen and rear light unit of vehicle, respectively, for detecting luminance in front and rear sides of vehicle |
US7358880B1 (en) * | 2007-02-07 | 2008-04-15 | Cirrus Logic, Inc. | Magnetic field feedback delta-sigma modulator sensor circuit |
US10527810B2 (en) | 2017-11-27 | 2020-01-07 | Auxora (Shenzhen) Inc. | Optical interconnect apparatus and system |
US10564359B2 (en) * | 2018-01-04 | 2020-02-18 | Auxora (Shenzhen) Inc. | Optical interconnect apparatus |
US11768332B1 (en) * | 2022-07-19 | 2023-09-26 | Mellanox Technologies, Ltd. | Wavelength splitter cable with mechanical key |
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US6002331A (en) * | 1998-07-20 | 1999-12-14 | Laor; Herzel | Method and apparatus for identifying and tracking connections of communication lines |
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US4952798A (en) * | 1990-01-03 | 1990-08-28 | Amp Incorporated | Optical simulator with loop-back attenuator and optical thin film |
US5109983A (en) * | 1991-01-28 | 1992-05-05 | Minnesota Mining And Manufacturing Company | Package for an optical fiber jumper |
GB9105435D0 (en) * | 1991-03-14 | 1991-05-01 | Bicc Plc | Optical cable joints |
US5155785A (en) * | 1991-05-01 | 1992-10-13 | At&T Bell Laboratories | Optical fiber interconnection apparatus and method |
US5751454A (en) * | 1996-10-10 | 1998-05-12 | Northern Telecom Limited | Wavelength bypassed ring networks |
US6305848B1 (en) * | 2000-06-19 | 2001-10-23 | Corona Optical Systems, Inc. | High density optoelectronic transceiver module |
-
2001
- 2001-05-25 US US09/866,272 patent/US6798965B2/en not_active Expired - Fee Related
- 2001-06-01 EP EP01941807A patent/EP1287394A2/en not_active Withdrawn
- 2001-06-01 WO PCT/US2001/017828 patent/WO2001094997A2/en not_active Application Discontinuation
- 2001-06-01 CA CA002410937A patent/CA2410937A1/en not_active Abandoned
- 2001-06-01 AU AU2001275132A patent/AU2001275132A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4589724A (en) * | 1980-03-03 | 1986-05-20 | Siemens Aktiengesellschaft | Multiple branching light wave guide element |
US5774245A (en) * | 1996-07-08 | 1998-06-30 | Worldcom Network Services, Inc. | Optical cross-connect module |
US6002331A (en) * | 1998-07-20 | 1999-12-14 | Laor; Herzel | Method and apparatus for identifying and tracking connections of communication lines |
Also Published As
Publication number | Publication date |
---|---|
AU2001275132A1 (en) | 2001-12-17 |
US6798965B2 (en) | 2004-09-28 |
CA2410937A1 (en) | 2001-12-13 |
US20020009266A1 (en) | 2002-01-24 |
WO2001094997A3 (en) | 2002-04-25 |
EP1287394A2 (en) | 2003-03-05 |
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