EP0162861A4 - Dispositif de couplage/connexion de fibres optiques et dispositif d'interface electronique/fibres optiques. - Google Patents

Dispositif de couplage/connexion de fibres optiques et dispositif d'interface electronique/fibres optiques.

Info

Publication number
EP0162861A4
EP0162861A4 EP19840903877 EP84903877A EP0162861A4 EP 0162861 A4 EP0162861 A4 EP 0162861A4 EP 19840903877 EP19840903877 EP 19840903877 EP 84903877 A EP84903877 A EP 84903877A EP 0162861 A4 EP0162861 A4 EP 0162861A4
Authority
EP
European Patent Office
Prior art keywords
fiber optic
lightguide
signals
optical
transmit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19840903877
Other languages
German (de)
English (en)
Other versions
EP0162861A1 (fr
Inventor
Karel Jan Kosman
Richard Francis Cantwell
Robert Edward Dutton
William Allen Gibson
Vernon Roy Hargrave
Matthew Lee Mcconnell
David William Roecker
Jerry Leo Fife
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raycom Systems Inc
Original Assignee
Raycom Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raycom Systems Inc filed Critical Raycom Systems Inc
Publication of EP0162861A1 publication Critical patent/EP0162861A1/fr
Publication of EP0162861A4 publication Critical patent/EP0162861A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/502—LED transmitters
    • 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
    • G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two 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
    • G02B6/3887—Anchoring optical cables to connector housings, e.g. strain relief features
    • G02B6/3889—Anchoring optical cables to connector housings, e.g. strain relief features using encapsulation for protection, e.g. adhesive, molding or casting resin
    • 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
    • G02B6/40—Mechanical coupling means having fibre bundle mating means
    • G02B6/403—Mechanical coupling means having fibre bundle mating means of the ferrule type, connecting a pair of ferrules
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4212—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4246—Bidirectionally operating package structures
    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/14—Mode converters
    • 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
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • 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
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3845—Details of mounting fibres in ferrules; Assembly methods; Manufacture ferrules comprising functional elements, e.g. filters
    • 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
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3861—Adhesive bonding
    • 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
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3863—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using polishing techniques

Definitions

  • Modems modulation/demodulation units
  • baud rates may be limited to the particular modem utilized.
  • baud rates have increased substantially over the past few years, the speed at which data is communicated via modems is slow when compared to other methods of communicating data. This is due, in part, to the limited bandwidth resulting from the frequency at which modems operate.
  • Greenberg discloses a time division multiplexing scheme in which problems due to reflections in a Y-coupler device are eliminated by disabling each receiver when a corresponding transmitter is transmitting data.
  • Herskowitz uses angular division multiplexing to allow for simultaneous bi-directional transmission of data over a single optic fiber.
  • Sugimoto et al, Hafle and Seki et al all disclose wavelength multiplexing to enable bi-directional transmission of optical data over a single fiber optic cable. Again, such systems require complex multiplexing schemes which are expensive to implement.
  • the present invention may also comprise a bidirectional fiber optic communication device comprising fiber optic cable means for bi-directionally communicating optical input signals and optical output signals; transmit fiber means for transmitting the optical output signals; receive fiber means for receiving optical input signals; combined coupler/connector means for axially and angularly aligning the transmit and receive fiber means with the fiber optic cable means to allow simultaneous bi-directional coupling of the optical input and output signals between the transmit and receive fiber means and the fiber optic cable means in the coupler/connector means; receiver assembly means for detecting the optical input signals and producing electrical input signals representative of the optical input signals; transmitter assembly means for producing the optical output signals in response to electrical output signals.
  • a bidirectional fiber optic communication device comprising fiber optic cable means for bi-directionally communicating optical input signals and optical output signals; transmit fiber means for transmitting the optical output signals; receive fiber means for receiving optical input signals; combined coupler/connector means for axially and angularly aligning the transmit and receive fiber means with the fiber optic cable means to allow simultaneous bi-directional coupling of the optical input and output signals
  • Fig. 1 comprises a schematic block diagram of the fiber optic interface device of the present invention.
  • Fig. 7 comprises a schematic diagram of the line receiver device.
  • Fig. 22 is an end view of the sub-assembly ferrule and fiber optic lightguides surrounded with the mode-stripping medium.
  • Fig. 27 is an end view of the PIN diode and receive fibers.
  • Fiber optic interface 10 provides an interface device for connecting various devices such as micro-computors, mini-computers, main frame computers, controllers, terminals, peripheral units, and other such devices, via a fiber optic, bi-directional cable, which is immune to electro-magnetic and radio-frequency interference, short circuits, grounding problems and static discharges. Additionally, the fiber optic link provides data security by protecting information against eavesdropping and data link taps. As illustrated in Fig. 1, the fiber optic link cable is coupled to the fiber optic interface 10 at fiber optic bi-directional input/output port 16. Fiber optic interface 10 provides interconnection with other fiber optic interface devices using bi-directional communications over a single, fiber optic cable.
  • the fiber optic interface device 10 has an encoding and fiber transmitter device 96 which receives a "data out" fiber signal from the data steering device 100 and performs transition encoding for transmission in the proper format over fiber optic output lightguides 102. Transmit F1 and transmit F2 signals produced by data steering device 100 are also received by encoding and fiber transmitter 96 to control the transmission rate of encoding and fiber transmitter 96.
  • the transmit F1 signal indicates a mark 1 transmission interval of 40 milliseconds between pulse, while the transmit F2 signal indicates a transmission interval of mark 2 or data at 15 milliseconds or less between pulses.
  • Capacitor 212 provides AC coupling between amplifier 208 and amplifier 210. Feedback is provided between the output of amplifier 210 and the input of amplifier 208 via resistor 214 and capacitor 216 to improve the pulse response of the fiber receiver. The output of the amplification stages is AC coupled to the remainder of the circuit by capacitor 218. The detected signal is then applied to bias network 220. Resistors 222 and 224 provide a voltage divider network to generate a reference voltage signal across resistor 224. Capacitor 225 ties resistor 224 to AC ground while resistor 226 maintains resistor 224 at a positive DC voltage level.
  • the fiber optic interface unit can assume one of eight states of operation, determined by the status and history of the ready-in-A, ready-in-B, ready-in-bridge and fiber optic link signals.
  • the standby state the unit is powered but all ready-in (A, B, bridge) signals are off and no signal is being received by the fiber.
  • the active state three conditions exist; active A, active B and active F. In these states, the unit is powered and one ready-in (A, B, bridge, or F signal) is on.
  • the linking state two linking conditions exist; linking A and linking B. In these states, the unit is powered on, a ready-in signal is received and an active fiber signal is received.
  • the fiber optic interface device 10 has not yet received acknowledgement of an end to end connection.
  • the bridge-active-A state occurs only when units are bridged. In this state, the A port is ready and the bridge signal from the other unit is active. In the connected state, three connected conditions exist; connected A-B, connected A-F (fiber-optics), and connected B-F (fiber-optics).
  • Case 3 B is ready, and both A and a remote device request service simultaneously: Device A is connected to device B;
  • the PWR-In input is connected to ground, and pins 7 and 13 are connected together.
  • the selection of the power options e.g. TTL only operation or RS-232 operation, is made with two power option programming pins. These pins are used to select the minus voltage powering option.
  • Fig. 13 illustrates one channel of line driver 92.
  • Line driver 92 generates five RS232 outputs from five CMOS inputs.
  • the five CMOS inputs comprise data-cut-A, data-out-B, ready-out A, ready-out B, and ready-out bridge signals. Each signal is applied to a separate channel, such as the channel illustrated in Fig. 13.
  • the data and ready signals are applied to the driver-in line 332 to operate CMOS switch 334.
  • a high level on driver input 332 causes CMOS switch 334 to be coupled to positive voltage supply 336 in the manner illustrated in Fig. 13, while a low level causes CMOS switch 334 to couple to a negative voltage supply 338.
  • the voltage levels provided by positive voltage supply 336 and negative voltage supply 338 cause current to flow through current-limiting resistors 340 and 342 to produce RS232 voltage levels and impedances at output 344.
  • the voltage supply sources provided at 336, 338 are capable of providing the drive capability necessary for RS232 communications.
  • Diodes 346, 348 provide protection from the presence of voltage levels at output 344.
  • Reflections at the combined coupler/connector interface are reduced in accordance with the present invention by mean recladding and/or mode stripping media which surround the individual glass fibers, and by precise longitudinal spacing providing a predetermined separation gap between the ends of the fibers and which is established by relative position of the fiber optic interface device ferrule and the single fiber optic link cable ferrule.
  • the individual glass fibers can be glass fibers with soft cladding stripped therefrom, glass fibers with hard cladding intact, or a combination thereof.
  • Function 558 discloses the near end reflection, with a 100 ft link using "reclad" couplers, measured concurrently with function 556. For the near end gap of between 5 and 40 micron this reflection is fairly constant and it is approximately 3 dB higher than reflection from a kilometer link. The assumption is that in a short link reflection from the far end of the cable is added to, and causes the measured increase of, the reflection at the near end.
  • strain relief insert 422 forces produced on sub-assembly coupler/connector 400, or other portions of sub-assembly device 390, will be transmitted through strain relief insert 422 via strain relief projection 424 to the fiber optic interface device enclosure, thereby preventing strain from being produced on fiber optic lightguides 406 which might cause longitudinal displacement of the fiber optic lightguides 406 in sub-assembly ferrule 402.
  • cable sleeving 416 is mounted in strain relief insert 422 to further relieve strain on fiber optic lightguides 406, as a result of forces produced on the sub-assembly device 390, or the fiber optic link cable end 396 and fiber optic link cable 398.
  • Fig. 18 comprises a schematic diagram of the assembly of fiber optic lightguides 406 in sub-assembly ferrule 402 (Fig. 16) .
  • three single fiber lightguides 406 are cut to length (as indicated by the distance between the sub-assembly ferrule 412 and transmitter/receiver board 392 in Fig. 16) .
  • Each lightguide 406 comprises a light guiding core having an optical cladding formed concentrically around it. The cladding maintains light trapped in the core by virtue of total internal reflections a result of the index of refraction of the cladding being less than the index of refraction of the core of the lightguide 406.
  • Fig. 19 discloses the fiber assembly illustrated in Fig. 18 mounted in sub-assembly ferrule 402.
  • the fiber assembly illustrated in Fig. 18 is inserted in opening 458 of sub-assembly ferrule 452 until heat shrink tube 454 abuts against abutment surface 460 in opening 458.
  • the glass fiber and recladding extend slightly from the end surface 461 of sub-assembly ferrule 402.
  • the closely spaced triangular configuration causes the fiber optic assembly to be self-centered in ferrule 402.
  • any excess lightguides and mode stripping medium are trimmed by air abrasive cutting and the rest of the process is identical to that described in connection with Fig. 19.
  • Figs. 23 through 25 illustrate strain relief insert 422.
  • Fig. 23 is a top view of strain relief insert illustrating the manner in which strain relief projection 424 protrudes from vertical portion 464.
  • Horizontal portion 466 joins vertical portion 464 at a substantially right angle, as further illustrated in Fig. 25.
  • Fig. 24 discloses opening 468 formed in vertical portion 464 which functions to hold the fiber optic lightguides 406 and cable sleeving 416 in a fixed relationship after heat shrink tube 420 has been secured to flange 424.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Paper (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

Un dispositif de couplage/connexion de fibres optiques (400) assure la transmission bidirectionnelle simultanée de signaux optiques par un seul câble de liaison à fibres optiques (398) et aligne de manière précise et sépare longitudinalement les fibres de guidage de lumière de transmission et de réception (426, 428) pour réduire la réflexion. Une densité à rapport de garniture élevé est obtenue en dépouillant les fibres de transmission et de réception de guidage de lumière (426, 428) et en appliquant un nouveau revêtement (450) ayant une épaisseur sensiblement plus petite que le revêtement d'origine. Une configuration stable, triangulaire est utilisée, laquelle présente des caractéristiques d'autocentrage et de stabilité. Le dépouillage réduit les réflexions résultant des modes de propagation d'ordre élevé du signal optique. Un tube en fluoropolymère à rétrécissement à chaud (452, 454, 482, 510) assure un alignement mécanique précis des guides de lumière et du câble de liaison (398), ainsi qu'une réduction de la divergence lumineuse aux extrémités de guidage de lumière des fibres optiques. Un dispositif d'interface électronique/fibres optiques (10) offre des doubles ports de données sérielles électroniques de sorte que des dispositifs multiples peuvent être interconnectés par un seul dispositif d'interface (10). Le renforcement des données optiques à plusieurs fréquences d'impulsions prédéterminées fournit un moyen de transmission d'informations opérationnelles d'états par la liaison de fibres optiques (95, 102) pour commander la commutation automatique du dispositif et le partage des ressources et éliminer le besoin d'avoir recours à des commutateurs mécaniques. Le câble de liaison à fibres optiques (95, 102) est protégé contre les interférences électromagnétiques et de hautes fréquences, les courts-circuits, les problèmes de mise à la terre et les décharges statiques. Le câble de liaison à fibres optiques assure la sécurité des données en prévoyant un moniteur de fibres indiquant une perte d'intégrité dans le câble de liaison. Le système fournit une liaison de communication à faible perte et grande largeur de bande, pouvant fonctionner sans aucune source d'alimentation de puissance extérieure.
EP19840903877 1983-11-15 1984-10-17 Dispositif de couplage/connexion de fibres optiques et dispositif d'interface electronique/fibres optiques. Withdrawn EP0162861A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US55203083A 1983-11-15 1983-11-15
US552030 1983-11-15

Publications (2)

Publication Number Publication Date
EP0162861A1 EP0162861A1 (fr) 1985-12-04
EP0162861A4 true EP0162861A4 (fr) 1987-04-14

Family

ID=24203666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840903877 Withdrawn EP0162861A4 (fr) 1983-11-15 1984-10-17 Dispositif de couplage/connexion de fibres optiques et dispositif d'interface electronique/fibres optiques.

Country Status (4)

Country Link
EP (1) EP0162861A4 (fr)
JP (1) JPS61500457A (fr)
AU (1) AU580740B2 (fr)
WO (1) WO1985002271A1 (fr)

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US4953947A (en) * 1986-08-08 1990-09-04 Corning Incorporated Dispersion transformer having multichannel fiber
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DE4017888C1 (en) * 1990-06-02 1991-10-24 Messer Griesheim Gmbh, 6000 Frankfurt, De Flame cutting machine for simplifying signal processing - used for data transmitting signals through lines of local network for control, automatic control or data recording
FI955200A (fi) 1995-10-31 1997-05-01 Nokia Mobile Phones Ltd Yhteiskäytäntö half-duplex -liikennöintiä varten
GB2352110A (en) * 1999-07-14 2001-01-17 Taiko Denki Co Ltd Plastic optical fibre cables in a telecommunication exchange
US7957116B2 (en) * 2006-10-13 2011-06-07 Advanced Analogic Technologies, Inc. System and method for detection of multiple current limits
US7532448B2 (en) * 2006-10-13 2009-05-12 Advanced Analogic Technologies, Inc. Current limit detector
US8267598B2 (en) 2006-12-06 2012-09-18 Motorola Mobility Llc Point to point optical communication system for conveying signals between multiple housings of a device
US7600925B2 (en) 2006-12-27 2009-10-13 Motorola, Inc. Clip connector for use in an optical communication coupling system
GB0805280D0 (en) * 2008-03-20 2008-04-30 British Telecomm Connecting a device
CN113315579A (zh) * 2021-05-14 2021-08-27 翁德喜 一种高聚物光纤的调制解调器

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Also Published As

Publication number Publication date
EP0162861A1 (fr) 1985-12-04
AU3553784A (en) 1985-06-03
AU580740B2 (en) 1989-02-02
WO1985002271A1 (fr) 1985-05-23
JPS61500457A (ja) 1986-03-13

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