WO2007109958A1 - Procédé, dispositif et système de transmission pour wdm-pon - Google Patents

Procédé, dispositif et système de transmission pour wdm-pon Download PDF

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Publication number
WO2007109958A1
WO2007109958A1 PCT/CN2007/000413 CN2007000413W WO2007109958A1 WO 2007109958 A1 WO2007109958 A1 WO 2007109958A1 CN 2007000413 W CN2007000413 W CN 2007000413W WO 2007109958 A1 WO2007109958 A1 WO 2007109958A1
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WO
WIPO (PCT)
Prior art keywords
sled
optical signal
optical
spectrum
wavelength
Prior art date
Application number
PCT/CN2007/000413
Other languages
English (en)
Chinese (zh)
Inventor
Tao Jiang
Jun Zhao
Yuntao Wang
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007109958A1 publication Critical patent/WO2007109958A1/fr

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Classifications

    • 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
    • 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
    • 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
    • H04J14/0241—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
    • H04J14/0246—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 using one wavelength per ONU
    • 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
    • H04J14/025—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 using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU

Definitions

  • the present invention relates to the field of optical communication networks, and in particular, to a transmission method, device and system for a WDM-PON (Wavelength Division Multiplexing-Passive Opticle Network).
  • WDM-PON Widelength Division Multiplexing-Passive Opticle Network
  • a P0N includes an OLT (optical line terminaton), an optical distribution network, and many OJs (Optical Network Units) or ONTs (Optical Network Terminations).
  • OLT optical line terminaton
  • OJs Optical Network Units
  • ONTs Optical Network Terminations
  • P0N can be divided into different types, namely ATM-P0N, EPON (Ethernet Over PON), and GPON (Gigabit Passive Optical Network), which are used in Asynchronous Transfer Mode (Asymmetric Transfer Mode).
  • Gigabit-rate passive optical network WDM (Wavelength Division Multiplexing), WB-P0N, and 0CMDA-P0N using CDMA (Code Division Multiple Access).
  • WDM-PON The structure diagram of WDM-PON is shown in Figure 1.
  • the structure diagram of AWG (array wave guide) in WDM-P0N is shown in Figure 2.
  • WDM-P0N has huge bandwidth capacity and information security similar to peer-to-peer communication, which has attracted widespread attention in the global communications industry.
  • WDM-PON network equipment is complex and costly, so it has not been commercially available.
  • TOM-P0N has once again become a hot spot in the global communications industry.
  • Many equipment manufacturers and communication experts are reducing the complexity of WDM-PON network equipment and reducing costs. A lot of in-depth research.
  • each 0NU or 0NT needs to generate different upstream wavelengths, it is required to be the same for each 0NU or 0NT mode for installation and maintenance. And the upstream laser power generated in each 0NU or 0NT should be large enough to tolerate or adjust the wavelength shift due to temperature variations (- 40-85 ⁇ ).
  • One method of modulating the wavelength of ONU or NMOS in the prior art is: a modulation scheme using optical loopback technology.
  • 0LT Taking ONT as an example, a schematic diagram of a modulation system using optical loopback technology is shown in FIG. 3, and a schematic structural diagram of a reflective laser in 0NT is shown in FIG. 4.
  • a part of the 0LT downlink optical signal is used as a carrier signal, that is, as a loopback wavelength, the carrier is transmitted to the ONT through the AWG.
  • the received carrier signal is modulated to a desired wavelength by a reflective laser and an amplifier, and the modulated optical signal is looped back to the 0LT.
  • the above modulation scheme using optical loopback technology requires that the output power of the 0LT source is large to support downlink and uplink transmission, and because there are two round-trip signals, the dynamic range of the uplink signal received by the 0LT is twice the normal dynamic range.
  • the frame structure of 0LT needs to be divided into two parts: downlink and uplink. If the downlink and uplink are evenly distributed, the uplink and downlink line rates of 0LT will be doubled, the sensitivity of the 0LT receiver will be reduced, and the power penalty of 0LT will be increased. . For single-fiber bidirectional transmission, the effects of Rayleigh scattering also need to be considered.
  • the solution is to use a high-power 0LT source, or a modulator that uses an integrated semiconductor optical amplifier in 0NU or 0NT.
  • the uplink and downlink signals are transmitted through the dual fiber to avoid interference caused by Rayleigh scattering.
  • optical loopback technology used in this scheme avoids the use of 0NU or 0NT light source, but requires 0LT light source output power to support downlink and uplink transmission, and because there are two rounds of optical signals, 0LT receives the uplink.
  • the signal dynamic range is twice the normal dynamic range. Therefore, this solution increases the complexity and cost of 0LT.
  • Another method for modulating the wavelength of 0NU or 0NT in the prior art is: a modulation scheme using a tunable laser, and a schematic diagram of the scheme is shown in FIG.
  • the main disadvantages of this method are: The price of the tunable laser that must be used in this method is very expensive.
  • An object of the embodiments of the present invention is to provide a WDM-PON transmission method, apparatus, and system, which can simplify the structure of the WDM-PON system and greatly reduce the cost of the WDM-PON system.
  • a method for transmitting a wavelength division multiplexed passive optical network comprising:
  • the 0NU or ONT transmits the uplink wide spectrum optical signal with the set SLED as its light emitting source.
  • a transmission device for a wavelength division multiplexed passive optical network comprising:
  • 0NU or 0NT Set with SLED and light emission drive circuit, through the transmitted electrical signal to the set SLED
  • the row driver drives the upstream optical signal through the SLED using the set light emission driving circuit.
  • a transmission system for wavelength division multiplexing passive optical networks comprising:
  • 0LT transmitting a downlink optical signal to a remote spectral splitting and combining unit, and receiving a spectral split of the far end and a synthesized uplink optical signal sent by the combining unit;
  • Spectral segmentation and synthesis unit It has the functions of spectral segmentation and synthesis.
  • the downlink optical signal sent by 0LT is spectrally segmented and transmitted to each 0NU or 0NT, and the upstream optical signals transmitted by each ONU or 0NT are spectrally split and then wavelength. After the synthesis process is passed to 0LT;
  • an SLED and a light emission driving circuit are provided, and the set SLED is driven by the transmitted electrical signal, and the set light emission driving circuit is used to send the spectral splitting and synthesizing unit to the far end through the SLED Uplink broad spectrum optical signal.
  • the embodiment of the present invention uses an inexpensive SLED (superluminescent diode) as a light emitting source in the 0NU or 0NT and 0LT of the WDM-P0N system. . Therefore, the structure of the WDM-PON system can be simplified without complicated optical loopback technology, the cost of the WDM-PON system is greatly reduced, and the reliability of the WDM-PON system is improved.
  • SLED superluminescent diode
  • Figure 1 is a schematic structural view of WDM-PON
  • FIG. 2 is a schematic structural view of an AWG in a WDM-PON in the prior art
  • FIG. 3 is a schematic structural diagram of a modulation system using optical loopback technology in the prior art
  • FIG. 4 is a schematic structural view of a reflection laser in 0NT in the system shown in FIG. 3;
  • FIG. 5 is a schematic diagram of a prior art modulation scheme using a tunable laser
  • FIG. 6 is a process flow diagram of an embodiment of the method of the present invention.
  • Figure 8 is a schematic diagram showing the structure of a 0NU or 0NT optical transmitter using SLED as a light source;
  • FIG. 9 is a schematic diagram of 0NT transmitting an uplink wide-spectrum optical signal to an AWG;
  • FIG. 10 is a schematic diagram of an AWG synthesizing an received wide-spectrum optical signal of a different wavelength into a specific wavelength optical signal;
  • FIG. 11 is a schematic structural diagram of an embodiment of a WDM-P0N transmission system according to the present invention. Mode for carrying out the invention
  • the embodiment of the invention provides a WDM-PON transmission method, device and system.
  • the main technical features of the embodiment of the present invention are: Using an inexpensive SLED as a light source of 0NU or 0NT in the TOM-PON system.
  • Step 6-1 Set the SLED in 0NU or 0NT, and set the SLED as the light source of the ONU or ONT.
  • the embodiment of the present invention first needs to set the SLED in the 0NU or 0NT optical transmitter in the WDM-P0N system.
  • SLED is a highly stable light source with high output power and a wide spectral range. Due to its large output power, it can effectively improve the resolution of the system.
  • the SLED can be driven directly by an electrical signal.
  • FIG. 7 A spectrum of an SLED provided by an embodiment of the present invention is shown in Fig. 7. It can be seen from Fig. 7 that the SLED has a high optical power over a wide spectrum.
  • 0NU or 0NT After SLED is set in 0NU or 0NT, 0NU or 0NT will use this SLED as its light source.
  • a schematic diagram of a 0NU or 0NT optical transmitter using SLED as a light source is shown in FIG.
  • the embodiment of the present invention further needs to set a light emission driving circuit capable of using a directly modulated SLED wide-spectrum light source in the ONU or the NTT.
  • 0NU or 0NT sets the SLED as its light emitting source, and directly passes through The transmitted electrical signal drives the SLED.
  • Each signal sent by the 0LT in the WDM-PON system is formed into a single optical path multi-wavelength optical signal through a combiner, and is transmitted downward through the optical network path, and the single optical path multi-wavelength optical signal transmitted by the remote end through the splitter After wavelength separation processing, it is passed to each 0NU or 0NT.
  • an SLED and an optical emission driving circuit capable of using a directly modulated SLED wide-spectrum light source may also be disposed at the 0LT end of the WDM-P0N, and then the 0LT utilizes the optical emission driving circuit to multiplex the signal into the 0LT through the SLED.
  • the splitter or splitter transmits a broad spectrum downstream optical signal.
  • the optical transmission driving circuit is configured to send an uplink wide spectrum to the multiplexer or the splitter at the remote node by using the SLED.
  • the optical signal, the combiner or splitter at the remote node can be implemented by the AWG. The embodiment of the present invention will be described below by taking an AWG as an example.
  • FIG. 1 A schematic diagram of 0NT transmitting an uplink wide spectrum optical signal to the AWG is shown in FIG.
  • the AWG contains an input port corresponding to each 0NU or 0NT, and the input port can only pass optical signals of a specific wavelength.
  • the uplink wide-spectrum optical signals transmitted by the respective ONUs or 0NTs through the SLEDs are transmitted to the AWGs through input ports corresponding to the respective ONUs or NTTs.
  • the AWG performs spectral division processing on the received uplink wide-spectrum optical signal through the above input port.
  • FIG. 1 A schematic diagram of the AWG synthesizing the received wide-spectrum optical signals of different wavelengths into optical signals of a specific wavelength is shown in FIG.
  • the AWG performs wavelength synthesis processing on the uplink optical signal subjected to the spectral division processing, and combines the uplink optical signal subjected to the spectral division processing into an optical signal of a specific wavelength, and then transmits the optical signal of the specific wavelength to the OLT.
  • the schematic diagram of the structure of the transmission system of the WDM-PON according to the embodiment of the present invention is as shown in FIG. 11, and includes the following modules: 0LT: Sends a downlink optical signal to a spectral splitting and synthesizing unit at the far end. Receiving a synthesized optical wave of a specific wavelength transmitted by the spectral division and synthesis unit.
  • the SLED module can be included in the 0LT.
  • the SLED module includes an SLED and a light emission driving circuit capable of using a directly modulated SLED broad spectrum light source.
  • the 0LT can use the light emission driving circuit to transmit a downstream optical signal to the spectral division and synthesis unit through the SLED.
  • Spectral segmentation and synthesis unit with the function of spectral segmentation and synthesis.
  • the downlink optical signal sent from 0LT is spectrally divided and transmitted to each 0NU or 0NT.
  • the uplink wide-spectrum optical signal transmitted from each ONU or ONT is subjected to spectral division and wavelength synthesis processing, and then transmitted to 0LT.
  • the spectral segmentation and synthesis unit can be implemented by AWG.
  • the spectral segmentation and synthesis unit includes: a spectral segmentation module and a spectral synthesis module.
  • the spectral segmentation module performs spectral segmentation processing on the received downlink optical signal transmitted by the 0LT, and then transmits it to each 0NU or 0NT.
  • the spectrum synthesis module includes: an input port corresponding to each 0NU or 0NT, and receives an uplink wide-spectrum optical signal transmitted by each ONU or 0NT through an input port corresponding to each ONU or 0NT, and performs the received uplink wide-spectrum optical signal. Spectral segmentation processing. Then, the uplink optical signal subjected to the spectral division processing is combined with an optical signal of a specific wavelength and transmitted to 0LT.
  • the SLED is used as the light emission source, and the uplink wide-spectrum optical signal is sent to the spectral division and synthesis unit through the SLED. Receiving a downlink optical signal transmitted by the spectral division and synthesis unit.
  • the SLED module is included in 0NU or 0NT.
  • the SLED module includes an SLED and a light emission drive circuit capable of using a directly modulated SLED wide spectrum source.
  • the 0NU or 0NT uses the light emission driving circuit to transmit an uplink wide spectrum optical signal to the AWG through the SLED.
  • the transmission device of the WDM-P0N according to the embodiment of the present invention is the above 0NU or 0NT.

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

Abstract

Procédé, dispositif et système de transmission pour WDM-PON (miltiplexage par répartition en longueur d'onde-réseau optique passif). Ce procédé englobe les opérations suivantes: réglage de la SLED (diode luminescente à super-rayonnement) dans l'ONU (unité de réseau optique) ou l'ONT (point terminal de liaison optique) de WDM-PON; utilisation par ONU ou ONT de SLED en tant que source d'émission optique, envoi d'un signal à spectre à large bande vers le haut. Le dispositif comprend ONU ou ONT. Le système comprend OLT, unité de division et de combinaison de spectre, et ONU ou ONT. L'emploi de ce procédé, de ce dispositif et de ce système peut permettre de simplifier la configuration du système WDM-PON et d'en réduire le coût.
PCT/CN2007/000413 2006-03-24 2007-02-07 Procédé, dispositif et système de transmission pour wdm-pon WO2007109958A1 (fr)

Applications Claiming Priority (2)

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CN200610058451.6 2006-03-24
CN 200610058451 CN101043287B (zh) 2006-03-24 2006-03-24 波分复用的无源光网络的传输方法和***

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114339486A (zh) * 2021-12-17 2022-04-12 中国电子科技集团公司第四十四研究所 一种时频信号的光纤网络分配与传输方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102710361B (zh) * 2012-06-01 2015-09-30 华为技术有限公司 一种分布式基站信号传输***及通信***
CN103345281B (zh) * 2013-06-27 2015-11-25 江苏亨通光网科技有限公司 高可靠波分阵列光波导温度控制装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1481105A (zh) * 2002-08-06 2004-03-10 波分多路复用无源光学网络***
US20040126112A1 (en) * 2002-12-12 2004-07-01 Kim Byoung Whi Method for optically copying packet
JP2004222304A (ja) * 2003-01-15 2004-08-05 Samsung Electronics Co Ltd 波長分割多重方式光源及びこれを利用した受動型光加入者ネットワークシステム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1481105A (zh) * 2002-08-06 2004-03-10 波分多路复用无源光学网络***
US20040126112A1 (en) * 2002-12-12 2004-07-01 Kim Byoung Whi Method for optically copying packet
JP2004222304A (ja) * 2003-01-15 2004-08-05 Samsung Electronics Co Ltd 波長分割多重方式光源及びこれを利用した受動型光加入者ネットワークシステム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114339486A (zh) * 2021-12-17 2022-04-12 中国电子科技集团公司第四十四研究所 一种时频信号的光纤网络分配与传输方法
CN114339486B (zh) * 2021-12-17 2024-02-27 中国电子科技集团公司第四十四研究所 一种时频信号的光纤网络分配与传输方法

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CN101043287A (zh) 2007-09-26

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