WO2000074278A1 - Reseau optique passif wdm avec superposition de la diffusion - Google Patents

Reseau optique passif wdm avec superposition de la diffusion Download PDF

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Publication number
WO2000074278A1
WO2000074278A1 PCT/US2000/013770 US0013770W WO0074278A1 WO 2000074278 A1 WO2000074278 A1 WO 2000074278A1 US 0013770 W US0013770 W US 0013770W WO 0074278 A1 WO0074278 A1 WO 0074278A1
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WO
WIPO (PCT)
Prior art keywords
optical
receiver
pon
optical terminal
terminal defined
Prior art date
Application number
PCT/US2000/013770
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English (en)
Inventor
Christoph P. Pfistner
Original Assignee
Advanced Fibre Communications
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 Advanced Fibre Communications filed Critical Advanced Fibre Communications
Priority to AU50303/00A priority Critical patent/AU5030300A/en
Publication of WO2000074278A1 publication Critical patent/WO2000074278A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0247—Sharing one wavelength for at least a group of ONUs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/0252—Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring

Definitions

  • the field of invention relates to fiber optic technology and, more specifically, to fiber optic solutions that may include an interface to a passive optical network.
  • each physical connection is typically coupled to a separate network and corresponding service provider.
  • a switched telephone network may be managed by a Local Exchange Carrier (LEC) and a CATV network may be managed by a CATV company.
  • Internet traffic also typically involves an Internet Service Provider (ISP) coupled to the telephone network.
  • ISP Internet Service Provider
  • FSAN Full Services Access Network
  • ITV-T G983 resulted and defined quidelines for an ATM-based passive optical network (PON).
  • PON employs fiber optic technology. Fiber optic cables allow high bandwidth over long distances and, therefore, serve as an ideal medium for delivering integrated voice, data and video services over a sizable geographic region, such as a suburban neighborhood community.
  • FIG. 1 illustrates a FTTH architecture as set forth in FSAN Specification ITU-T G.983 (hereinafter "FSAN").
  • a resource sharing PON 103 optically couples an optical line unit (OLT) 101 to multiple optical home terminals (OHTs) 106._ N in or near home total 104.. N , respectively.
  • OLT optical line unit
  • OHT optical home terminals
  • a single fiber containing all the traffic from the network 102 is communicated by OLT 101 to OHTs 106,. N using PON 103. That is, the OLT 101 distributes the services to each of homes 104 j.N via optical signaling techniques across the PON 103.
  • each of homes 104 ⁇ simultaneously receive/monitor the "downstream" signals (i.e., signals from the OLT 101 to the homes 104 ⁇ ). Furthermore, OLT 101 is capable of receiving/monitoring upstream traffic from each of the homes 104 ⁇ via OHTs 106 ⁇ respectively.
  • the downstream traffic may be implemented with 1.5um light while the upstream traffic is transmitted with 1.3um light.
  • the PON 103, OLT 105 and OHT 106.. N are responsible for converting higher level signals (such as, for example, the dialing sequence of an outgoing phone call from a ⁇ ome) into optical signals, transporting them across the PON 103, and reconverting the optical signals back into corresponding higher level signals at the other end of the PON 103.
  • higher level signals such as, for example, the dialing sequence of an outgoing phone call from a ⁇ ome
  • OLT 101 includes a 1.31 ⁇ m receiver 130 and a 1.5 ⁇ m transmitter 107, each of which is coupled to PON 103.
  • Any of the OHTs lO ⁇ such as, for example, OHT lO ⁇ j , comprises a 1.3 ⁇ m transmitter 108 and a 1.5 ⁇ m receiver 109.
  • a system is realized having 1480-1580nm traffic in a downstream (i.e., OLT 105 to OHTs 106 ⁇ ) direction and 1260-1360nm traffic in an upstream (i.e., OHTs 106 ⁇ to OLT 101) direction.
  • both the transmitters 107 and 108 and the receivers 109 and 130 are optically coupled to the PON 103.
  • both the OLT 101 and OHTs 106 ⁇ are optically coupled to the PON 103, since these devices in each are optically coupled to the PON 103.
  • the PON-based FTTH architecture specified by in the FSAN uses transceivers with comparable power levels in the OHTs lO ⁇ and OLT 101.
  • the FTTH approach of FSAN distributes the optical link costs evenly between the transmission and reception locations.
  • a transmitter's cost is typically measured by the maximum optical power it can launch into the optical fiber, while a receiver's cost is typically measured by the minimum optical power (also referred to as sensitivity) it can detect from the optical fiber.
  • a modest distance optical link in the FTTH approach of FSAN uses a modest optical launch power transmitter and a modestly receptive receiver with the costs being evenly distributed. Therefore, service providers pay the same amount in both sides of the link for the OLT and OHTs. As those OLTs and OHTs are expensive, it would be desirable to reduce their cost.
  • the FSAN approach limits the downstream 1540nm signal to a single channel which forces the use of a separate connection (or other high overhead) for video services.
  • the FSAN specification does not provide for an overlay channel.
  • the high overhead associated with the single 1480-1580nm channel approach also raises costs where a simple "broadcast" video channel (i.e., traffic sent only in a downstream direction such as basic CATV service) is needed and the use of a second parallel network may be required.
  • the system includes a pair of optical terminals commiinicating using a passive optical network (PON).
  • a first optical terminal is coupled to the PON and has a transceiver that includes a transmitter and a receiver.
  • An amplifier e.g., EDFA
  • a second optical terminal is coupled to the PON.
  • the first and second optical terminals communicate over the PON using asymmetrical optical power levels.
  • the amplifier amplifies information that is to be transmitted on a channel overlayed onto the PON.
  • the optical terminal comprises a transceiver, a receiver and a first wavelength division multiplexer (WDM) filter.
  • the transceiver has a transmitter, a receiver and a second WDM filter.
  • the first WDM filter is coupled to the transceiver and the receiver and interfaces an asymmetric optical link to the transceiver.
  • the first WDM filter splits the transmission window of the asymmetric optical link to the optical terminal into two wavelengths to extract an additional channel for reception by the receiver.
  • FIG 1 is a prior art FSAN Fiber To The Home (FTTH) architecture.
  • Figure 2 is one embodiment of an asymmetrical fiber optic architecture having a broadcast overlay.
  • FIG. 3 is one embodiment of an Optical Home Terminal (OHT).
  • OHT Optical Home Terminal
  • Figure 4 is one embodiment of an optical transceiver module of the OHT of Figure 3.
  • PON passive optical network
  • a system set forth herein includes an optical line terminal (OLT) and one or more optical home terminals (OHTs) that transfer information over the PON.
  • OLT optical line terminal
  • OHTs optical home terminals
  • the communication link between the OLT and at least one OHT is an asymmetric communication link.
  • the system also provides for overlaying a channel onto this communication link.
  • the optical terminal comprises a transceiver, a receiver and a first wavelength division multiplexer (WDM) filter.
  • the transceiver has a transmitter, a receiver and a second WDM filter.
  • the first WDM filter is coupled to the transceiver and the receiver and interfaces communications from the PON to the transceiver.
  • the first WDM filter splits the transmission window of the PON into two wavelengths to extract an additional channel for reception by the receiver.
  • Figure 2 illustrates one embodiment of a system architecture.
  • the system includes OLT 201 and transmitter 202 optically coupled to passive optical networ PON) 203.
  • Mu tiple OHTs, suc as HT 206 w are optically coupled to PON
  • each of OLT 201, transmitter 202 and OHTs 206- .N are also physically coupled to PON 203.
  • OLT 201 provides an interface to a service provider sending network-based services to OHTs 206 j . N located at the home, small office or other site.
  • Each of the OHTs 206-. N may provide an interface for residential homes for receiving network based services to the home.
  • the link between the OLT 201 and OHTs 206 ⁇ is an asymmetrical communication link. That is, the long distance fiber optic communication link couples a transmitter in OLT 201 having a large optical launch power into PON 203 which is coupled to a low-cost receiver in one or more of OHTs 206 j.N to detect weak optical signals. Therefore, in this case, the transmit end at OLT 201 bears a greater proportion of the costs needed to implement the same modest link. This is advantageous because the system includes only one OLT for multiple OHTs, and the increase in cost associated with the OLT's higher power transmitter (and higher power receiver) is more than pffset by the decrease in cost of all the OHTs low power transmitters and receivers.
  • the attenuation of the link is greater than 30dB.
  • the transmitter/receiver pair sustains a greater than 30dB optical power drop between the transmitter and the receiver that it communicates with (e.g., the transmitter in OLT 201 and the receiver in an OHT, such as OHT 206.).
  • a part of the greater than 30dB drop stems from the PON 203 which uses a splitter 231 used to spread light signals from the OLT 201 transmitter to each of OHTs 206 j.N .
  • Various split ratios may be used (e.g., 1:256, 1:64, 1:32, 1:2, etc.).
  • Each link budget accounts for the optical power loss associated with the specific splitter employed.
  • split ratio relates to total distance in a manner that may be transparent to the overall link budget.
  • OLT 201 comprises a transmitter 207 and receiver 209.
  • Transmitter 207 transmits using optical transmission wavelengths of 1475-1485nm and has a relatively large maximum optical power of +3dBm.
  • Receiver 209 is receptive to optical transmission wavelengths of 1260-1360nm and has a less sophisticated sensitivity of -29dBm.
  • receiver 209 comprises a burst receiver.
  • one or more o s ._ N compr ses a transm tter an rece ver
  • Transmitter 208 has a relatively low maximum optical power of -7dBm and transmits at wavelengths of 1260-1360nm.
  • Receiver 230 has a more sophisticated sensitivity of -39dBm and is receptive to optical transmission wavelengths of 1475-
  • transmitters and/or receivers of optical powers different than those specified above may be used.
  • the system is FSAN compliant.
  • the downstream link uses a spectral window of lOOnm for the 1.5 ⁇ m. That is, the downstream channel may comprise light between 1480nm and 1580um.
  • the upstream channel may use light for the i.3 ⁇ m. That is, the upstream channel may comprise light anywhere between 1260-1360nm.
  • the system splits the downstream channel into two channels.
  • the two channels are between 1475-1485nm and between 1535-1560nm.
  • the extra channel may be referred to as on overlay channel.
  • the system comprises three channels: a 1260-1360nm upstream, a 1475-1485nm downstream and a 1535-1560nm downstream channel.
  • the 1535-1560nm downstream channel is used to carry a broadcast, such as an analog CATV broadcast, over the PON 203.
  • the channel may be a high speed digital channel.
  • Transmitter 202 e.g., a linearized transmitter module
  • EDFA Erbium Doped fiber Amplifier
  • Transmitter 202 transmits information, using a laser modulator, which EDFA 212 amplifies.
  • the results of application by EDFA 212 is an optical transmission having +26dBm optical power.
  • Other types of amplifiers may be used.
  • the transceiver formed by transmitter 207 and receiver 209 and transmitter 202 interface to PON 203 using wavelength division multiplexing (WDM) multiplexer.
  • WDM wavelength division multiplexing
  • a receiver 213 receives the optical transmission for transmitter 202.
  • receiver 213 is receptive to optical transmission wavelengths of 1535-1560nm.
  • a broadband backplane is coupled to OLT 201 and organizes or otherwise encodes and decodes digital traffic as well as separates the digital traffic associated with each service.
  • a Passive Optical Network (PON) is provided that supports bidirectional WDM point-to-multipoint transmission.
  • the downstream information is broadcasted on a rs wave eng us ng me v s on u p ex ng ce pac et ase rou ng or identification of destination.
  • the upstream information from each network unit is carried on a second wavelength using TDMA cell/packet based burst transmission mode.
  • a broadcast signal can be overlayed on a third wavelength for point to multipoint transmission.
  • FIG 3 is a block diagram of one embodiment of an OHT 206.
  • an optical connector 324 is coupled to an optical transceiver module 340.
  • the optical transceiver module 340 is coupled to a digital network interface 320, an internal switch 330 and a power management block 370.
  • Digital network interface 320 is also coupled to the power management block 350 and internal switch 330, as well as a line interface module 321.
  • Internal switch 330 is also coupled to an analog CATV broadcast interface 322.
  • Line interface module 321 is also coupled to power management block 350 and multiple service providers.
  • optical transceiver module 340 transmits and receives signals to and from PON 203, respectively, using optical connector 324.
  • Optical connector 324 may comprise a single mode fiber connector.
  • optical transceiver module 340 comprises a wavelength division multiplexing (WDM) filter module 350, a receiver 313, a transmitter 308, and a receiver 311.
  • WDM wavelength division multiplexing
  • Receiver 313 is also coupled to WDM filter module 350.
  • Transmitter 308 and receiver 311 are coupled to digital network interface 320 and operate in combination as an interface for electrical/optical (E/O) and optical/electrical (O/E) conversion between optical digital traffic and electrical digital traffic.
  • Transmitter 308 receives optical digital traffic from digital network interface 320 and transmits it upstream to OLT 201, via PON 203.
  • Receiver 311 receives optical digital traffic from OLT 201, via PON 203, and sends it to digital network interface 320.
  • transceiver 308 is a 1.3 ⁇ m burst transmitter (that transmits using an optical transmission wavelength of 1310nm) and receiver 311 is a 1480nm receiver (that receives in a 1480nm window).
  • Transmitter 308 may comprise any light source.
  • associated with transmitter 308 is a LASER and a modulator (also referred to as a driver) for the LASER.
  • Receiver 311 may comprises any typically available receiver.
  • Receiver 311 may comprise a burst receiver.
  • receiver 311 is a photodetecting device (e.g., a PLN photodiode, APD, etc.) and an amplifier.
  • Receiver 313 receives a broadcast or other channel from PON 203 which is overlayed onto the asymmetric link between OLT 201 and OHT 206.
  • receiver 313 is a 1550nm receiver (that receives in a 1550 ran window), although receiver 313 may comprises any linear receiver.
  • Receiver 313 may be associated with a photodetecting device (e.g., a PIN photodiode, APD, etc.) and an amplifier.
  • the broadcast channel overlayed on the asymmetric link between OLT 201 and OHT 206 comprises an analog cable television (CATV) channel.
  • Receiver 313 provides the received analog broadcast signal to the CATV broadcast interface 322 via internal switch 330.
  • Switch 330 controls access to CATV broadcast services and is driven by digital network interface 320. Switch 330 is not necessary when access to the CATV broadcast service does not need to be controlled.
  • Digital network interface 320 is responsible for formatting both upstream and downstream digital traffic.
  • the traffic is all digital traffic except for the analog, 1550nm CATV broadcast signal received by receiver 313.
  • the digital traffic formatting may include any method suitable for organizing and /or encoding upstream digital traffic and also may include any method that successfully reconstructs organized/encoded downstream digital traffic. In one embodiment, formatting methods specified in FSAN are used.
  • digital network interface 320 is responsible for separating digital traffic (typically before formatting in the upstream direction and after formatting in the downstream direction) according to their associated services (e.g., telephone/voice and data).
  • associated services e.g., telephone/voice and data
  • Line interface module 321 is coupled to the digital network interface 320 and presents the user of the OHT 206 with the appropriate service interface.
  • Line interface module 321 receives the separate voice and data generated by digital network interface 320.
  • Line interface module 320 includes one or more interfaces.
  • line interface module 320 may provide interfaces, which may include, but are not limited to, those set forth in FSAN.
  • line interface module 320 provides an interface to voice service with a standard plain old telephone system (POTS) interface and also presents data service with either a ATM 25 interface and/or lOBase-T interface.
  • POTS plain old telephone system
  • LEEE 1394 Firewire and /or CE Bus data interfaces may provide (in lieu of or in addition to the aforementioned voice or data services) LEEE 1394 Firewire and /or CE Bus data interfaces as well.
  • Power management block 350 provides power, along with power management, for various components in OHT 206 in a manner well known in the art. Power management block 350 may be coupled to local AC power or one or more batteries.
  • Figure 4 illustrates one embodiment of the optical transceiver module 340 of OHT 206.
  • WDM filter module 350 comprises two filters 401 and 402. These filters are referred to herein as WDM filters. WDM filters 401 and 402 extract, from the optical connector 324, each of the wavelength dependent channels in the downstream direction and launch into the optical cable any wavelength dependent channels in the upstream direction.
  • WDM filters 401 and 402 comprise interference filters.
  • Filter 401 in conjunction with receiver 313 extract the downstream overlayed channel, which is a 1550nm CATV signal in one embodiment.
  • receiver 313 comprises a 1550nm PIN photodiode and filter 401 comprises an interference filter
  • downstream light in the 1535-1560 spectrum reflects off of filter 401 and impinges upon PIN photodiode of receiver 313 (which responds to light within the 1535-1560nm spectrum).
  • Filter 402 in conjunction with receiver 311, extracts the downstream 1480nm data signal.
  • receiver 311 comprises a 1310nm PIN photodiode and filter 402 comprises an interference filter
  • downstream light in the 1475- 1485nm spectrum passes through interference filter 401 but reflects off of interference filter 402 and impinges upon the PIN photodiode of receiver 311 (which responds to light in the 1475-1485nm spectrum).
  • the 1550nm channel is extracted at the PIN photodiode of receiver 313 and the 1480 channel is extracted at the PIN photodiode of receiver 311.
  • filters 401 and 402 may be implemented using integrated waveguide techniques.
  • upstream 1300nm light is launched into the WDM filter module 350, such that it passes through both filters 401 and 402 and into a fiber optic cable via op ca connector .
  • t e ter mo u e s capa e o extracting downstream channels while launching upstream channels.
  • Table 1 One embodiment of the specifications for the WDM filter module embodied in Figure 4 is provided in Table 1.
  • the OLT 205 (referring briefly back to Figure 2) has a similar architecture to the OHT 206 shown in Figures 3 and 4. Specifically, another WDM filter module extracts upstream light from the optical fiber network while launching downstream channels into the fiber optical network.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)

Abstract

Cette invention se rapporte, dans un mode de réalisation, au réseau optique passif PON (203) qui prend en charge une transmission WDM bidirectionnelle. Les informations en aval sont diffusées sur le réseau PON (203) à une première longueur d'ondes. Les informations en amont provenant de chaque unité du réseau sont transportées sur le réseau PON (203) à une seconde longueur d'ondes. Un signal de diffusion (1535-1560) peut être superposé au réseau PON (203) à une troisième longueur d'ondes.
PCT/US2000/013770 1999-05-28 2000-05-19 Reseau optique passif wdm avec superposition de la diffusion WO2000074278A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU50303/00A AU5030300A (en) 1999-05-28 2000-05-19 Wdm passive optical network with broadcast overlay

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32274399A 1999-05-28 1999-05-28
US09/322,743 1999-05-28

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WO2000074278A1 true WO2000074278A1 (fr) 2000-12-07

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WO2002058289A2 (fr) * 2001-01-18 2002-07-25 Infineon Technologies Ag Dispositif de transmission en bande large optique et procede de distribution
FR2823393A1 (fr) * 2001-04-10 2002-10-11 France Telecom Dispositif de transmission optique haut debit
WO2003010904A2 (fr) * 2001-07-20 2003-02-06 Marconi Intellectual Property (Ringfence) Inc Mise a niveau de reseau optique passif
WO2003028260A2 (fr) * 2001-09-28 2003-04-03 Intel Corporation Procede et dispositif de transmission de donnees amont dans un reseau optique
EP1401124A2 (fr) * 2002-09-23 2004-03-24 Samsung Electronics Co., Ltd. Système de réseau optique de raccordement d'abonnés pour la réception de signaux de diffusion/communication
WO2007082490A1 (fr) 2006-01-23 2007-07-26 Huawei Technologies Co., Ltd. Réseau optique passif, équipement et procédé de prise en charge de service de multidiffusion
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KR100950151B1 (ko) 2003-06-18 2010-03-30 주식회사 케이티 광 가입자망 구성장치

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US5969836A (en) * 1997-12-12 1999-10-19 Alcatel Usa Sourcing, L.P. Method and apparatus for simultaneous transmission of digital telephony and analog video over a single optic fiber using wave division multiplexing

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US5694234A (en) * 1994-10-20 1997-12-02 Lucent Technologies Inc. Wavelength division multiplexing passive optical network including broadcast overlay
US5969836A (en) * 1997-12-12 1999-10-19 Alcatel Usa Sourcing, L.P. Method and apparatus for simultaneous transmission of digital telephony and analog video over a single optic fiber using wave division multiplexing

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002058289A3 (fr) * 2001-01-18 2003-06-05 Infineon Technologies Ag Dispositif de transmission en bande large optique et procede de distribution
WO2002058289A2 (fr) * 2001-01-18 2002-07-25 Infineon Technologies Ag Dispositif de transmission en bande large optique et procede de distribution
FR2823393A1 (fr) * 2001-04-10 2002-10-11 France Telecom Dispositif de transmission optique haut debit
WO2002084906A1 (fr) * 2001-04-10 2002-10-24 France Telecom Dispositif de transmission optique haut debit
WO2003010904A2 (fr) * 2001-07-20 2003-02-06 Marconi Intellectual Property (Ringfence) Inc Mise a niveau de reseau optique passif
WO2003010904A3 (fr) * 2001-07-20 2003-12-18 Marconi Intellectual Pty Mise a niveau de reseau optique passif
US7254330B2 (en) 2001-07-20 2007-08-07 Tellabs Bedford, Inc. Single fiber passive optical network wavelength division multiplex overlay
US6925263B2 (en) 2001-09-28 2005-08-02 Intel Corporation Method and apparatus for transmission of upstream data in an optical network
WO2003028260A2 (fr) * 2001-09-28 2003-04-03 Intel Corporation Procede et dispositif de transmission de donnees amont dans un reseau optique
WO2003028260A3 (fr) * 2001-09-28 2003-09-04 Intel Corp Procede et dispositif de transmission de donnees amont dans un reseau optique
EP1401124A2 (fr) * 2002-09-23 2004-03-24 Samsung Electronics Co., Ltd. Système de réseau optique de raccordement d'abonnés pour la réception de signaux de diffusion/communication
EP1401124A3 (fr) * 2002-09-23 2005-05-11 Samsung Electronics Co., Ltd. Système de réseau optique de raccordement d'abonnés pour la réception de signaux de diffusion/communication
KR20040026177A (ko) * 2002-09-23 2004-03-30 삼성전자주식회사 방송 및 통신 신호를 수용할 수 있는 광가입자망 시스템
KR100950151B1 (ko) 2003-06-18 2010-03-30 주식회사 케이티 광 가입자망 구성장치
EP1494382A3 (fr) * 2003-06-30 2009-01-28 Samsung Electronics Co., Ltd. Réseau Ethernet passive optique avec convergence de diffusion et communication
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WO2007082490A1 (fr) 2006-01-23 2007-07-26 Huawei Technologies Co., Ltd. Réseau optique passif, équipement et procédé de prise en charge de service de multidiffusion
EP1981196A1 (fr) * 2006-01-23 2008-10-15 Huawei Technologies Co., Ltd. Réseau optique passif, équipement et procédé de prise en charge de service de multidiffusion
EP1981196A4 (fr) * 2006-01-23 2009-06-03 Huawei Tech Co Ltd Réseau optique passif, équipement et procédé de prise en charge de service de multidiffusion

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