CN101043287A - Transmission method and system for wavelength-division multiplexed passive optical network - Google Patents

Transmission method and system for wavelength-division multiplexed passive optical network Download PDF

Info

Publication number
CN101043287A
CN101043287A CN 200610058451 CN200610058451A CN101043287A CN 101043287 A CN101043287 A CN 101043287A CN 200610058451 CN200610058451 CN 200610058451 CN 200610058451 A CN200610058451 A CN 200610058451A CN 101043287 A CN101043287 A CN 101043287A
Authority
CN
China
Prior art keywords
sled
ont
onu
olt
signal
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.)
Granted
Application number
CN 200610058451
Other languages
Chinese (zh)
Other versions
CN101043287B (en
Inventor
江涛
赵峻
王运涛
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.)
Huawei Technologies Co Ltd
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
Priority to CN 200610058451 priority Critical patent/CN101043287B/en
Priority to PCT/CN2007/000413 priority patent/WO2007109958A1/en
Publication of CN101043287A publication Critical patent/CN101043287A/en
Application granted granted Critical
Publication of CN101043287B publication Critical patent/CN101043287B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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

Landscapes

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

Abstract

The invention provides a transmission method and system of WDM-PON, the method mainly includes: setting SLED in ONU or ONT of WDM-PON; said ONU or ONT regards said SLED as the light emitter to transfer up-bound wide spectrum light signal. Using the invention can make structure of WDM- PON system simplified, and decrease the cost of WDM- PON system.

Description

The transmission method of the EPON of wavelength division multiplexing and system
Technical field
The present invention relates to area of optical telecommunication networks, relate in particular to the transmission method and the system of a kind of WDM-PON (EPON of wavelength division multiplexing).
Background technology
The professional through-rate of many Internet inserts from dialing modem, ADSL (asymmetric digital line subscribers feeder), CM (cable modem), the VDSL modes such as (Very-high-speed Digital Subscriber Line) of 56K to several million respectively.But, for high-quality video information business, VoD (Videoon Demand are provided, video request program) various new business such as business, the bandwidth that needs about 100M is carried out the transmission of data, and above-mentioned several access waies can't satisfy the requirement of these new business, therefore, demand with the optical fibre installation Access Network increases rapidly, such as, PON (EPON) just can satisfy these new business demands, and has economy and operation maintenance characteristics easily.
A PON comprises an OLT (local side apparatus), an optical distribution network and many ONU (optical network unit) or ONT (Optical Network Terminal), difference according to the PON realization, PON can be divided into different types, be respectively ATM-PON, EPON (the Ethernet Over PON that adopts ATM (asynchronous transfer mode), EPON based on Ethernet), GPON (EPON) with gigabit speed, adopt the WDM-PON of WDM (wavelength division multiplexing) and the OCMDA-PON that adopts CDMA (code division multiple access).
The structural representation of WDM-PON as shown in Figure 1, the structural representation of the AWG among the WDM-PON (Arrayed Waveguide Grating) is as shown in Figure 2.WDM-PON is owing to the Information Security of its huge bandwidth capacity, similarity point to-point communication causes global communication expert's extensive concern, but WDM-PON network equipment complexity, cost are very high, therefore can't really realize commercialization always.Recent years, because the development of optical communication technique, the decline of relative photo communication device price, WDM-PON becomes the focus of global communications industry again once again, and many equipment vendors and communications experts are reducing WDM-PON network equipment complexity, are doing a large amount of, deep research aspect reducing cost.
In the design of ONU or ONT, convenient though each ONU or ONT will produce different up wavelength for installation and maintenance, require each ONU or ONT striking resemblances.And it is enough big that the up laser power that produces among ONU or the ONT is wanted, can tolerate or adjust the wavelength shift that causes owing to variations in temperature (40-85 ℃).
The method of the wavelength of a kind of ONU of modulation or ONT is in the prior art: adopt the ring of light to return the modulation scheme of technology.The ring of light technology of returning is to utilize the downlink optical signal of a part of OLT as carrier wave, is modulated to the wavelength that needs by reflection laser and amplifier in ONU or ONT, and the light signal after will modulating again sends to OLT.With OLT is example, adopt the ring of light return technology modulating system structural representation as shown in Figure 3, wherein the structural representation of the reflection laser among the ONT is as shown in Figure 4.
The modulation scheme that the above-mentioned employing ring of light returns technology requires the light source output power of OLT very big, and supporting descending and uplink, and because two journey signals are back and forth arranged, the upward signal dynamic range that OLT receives is 2 times of common dynamic scope.Simultaneously the frame structure of OLT need be divided into descending and up two parts, if average distribution to descending and up, then the wire rate of the uplink and downlink of OLT will double, and the sensitivity of the receiver of OLT will reduce, and will increase the Power penalty of OLT.For the single fiber bi-directional transmission, also need consider the influence of Rayleigh scattering.The way that solves is to adopt high power OLT light source, perhaps uses the modulator of integrated semiconductor image intensifer in ONU or ONT.The uplink and downlink signal will be by two fine transmission, with the interference of avoiding Rayleigh scattering to produce.
The shortcoming that the above-mentioned employing ring of light returns the modulation scheme of technology is:
Though 1, the ring of light technology of returning has been avoided use ONU or ONT light source, but require the light source output power of OLT very big, supporting descending and uplink, and because two journey light signals are back and forth arranged, the upward signal dynamic range that OLT receives is 2 times of common dynamic scope.
2, need in ONU or ONT, use laser and amplifier, increase system complexity and cost.And the price of wavelength locking F-P laser or RSOA (reflective semiconductor optical amplifier) is very expensive.
The method of the wavelength of another kind of modulation ONU or ONT is in the prior art: adopt the medical treatment scheme of tunable laser, the schematic diagram of this scheme as shown in Figure 5.The major defect of this method is: the price of tunable laser is very expensive.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide transmission method and the system of a kind of WDM-PON, thereby can make simplifying the structure of WDM-PON system, greatly reduce the cost of WDM-PON system.
The objective of the invention is to be achieved through the following technical solutions:
A kind of transmission method of EPON of wavelength division multiplexing comprises step:
A, in the optical network unit ONU of the EPON WDM-PON of wavelength division multiplexing or Optical Network Terminal ONT, superradiation light-emitting diode SLED is set;
B, described ONU or ONT as its photo-emission source, send the up-bound wide spectrum light signal with the SLED of described setting.
Described steps A specifically comprises:
SLED is set in ONU in the WDM-PON system or the optical sender of ONT and can uses the light of SLED to launch drive circuit.
Described step B specifically comprises:
Described ONU or ONT receive the downlink optical signal from local side apparatus OLT, and ONU or ONT as its photo-emission source, send the up-bound wide spectrum light signal with the SLED of described setting, and this wide range light signal is handled the back through wave multiplexer or channel-splitting filter and arrived OLT.
The up-bound wide spectrum modulation signal that described ONU or ONT upwards send is by directly modulating acquisition to SLED.
Described step B specifically comprises:
Each the road signal of OLT in B1, the WDM-PON system forms monochromatic light road multiple wavelength optical signal by wave multiplexer and sends downwards, and the monochromatic light road multiple wavelength optical signal that far-end passes over OLT by channel-splitting filter carries out passing to each ONU or ONT after wavelength separated is handled;
B2, described each ONU or ONT utilize the light emission drive circuit of described setting to send the up-bound wide spectrum light signal by the wave multiplexer or the channel-splitting filter of described SLED to the remote node place, this wave multiplexer or channel-splitting filter carry out the up-bound wide spectrum light signal that receives to pass to OLT after spectrum cuts apart that wavelength is synthetic again and handle.
Described step B1 also comprises:
SLED is set in the optical sender of the OLT in the WDM-PON system and can uses the light of SLED to launch drive circuit, OLT utilizes this light emission drive circuit to send the wide range downlink optical signal by the wave multiplexer or the channel-splitting filter of this SLED in OLT.
Described wave multiplexer of described step B2 or channel-splitting filter comprise: Arrayed Waveguide Grating AWG.
Described step B2 specifically comprises:
In AWG, be provided with and each ONU or ONT corresponding input end mouth, each ONU or ONT pass to AWG by the up-bound wide spectrum light signal of SLED emission by this input port, AWG carries out the up-bound wide spectrum light signal that receives to pass to OLT after spectrum cuts apart that wavelength is synthetic again and handle.
A kind of transmission system of EPON of wavelength division multiplexing comprises:
OLT: send downlink optical signal to the wave multiplexer at remote node place or channel-splitting filter, the uplink optical signal that the wave multiplexer at receiving remote node place or channel-splitting filter pass over after synthetic;
The wave multiplexer at remote node place or channel-splitting filter: have the function that spectrum is cut apart and synthesized, the downlink optical signal that OLT is passed over carries out passing to each ONU or ONT after the spectrum dividing processing, and the uplink optical signal that each ONU or ONT are passed over carries out passing to OLT after spectrum is cut apart that wavelength is synthetic again and handled;
ONU or ONT: be provided with SLED and can use the light of SLED to launch drive circuit, SLED to described setting drives by the signal of telecommunication that sends, utilizes the light emission drive circuit of described setting to send the up-bound wide spectrum light signal by the wave multiplexer or the channel-splitting filter of this SLED to the remote node place.
Wave multiplexer/the channel-splitting filter at described remote node place specifically comprises:
Spectrum is cut apart module: the downlink optical signal that the OLT that receives is passed over carries out passing to each ONU or ONT after wavelength separated handles;
Spectrum synthesis module: comprise and each ONU or ONT corresponding input end mouth, receive the up-bound wide spectrum light signal of each ONU or ONT emission by this input port, the up-bound wide spectrum light signal that receives is carried out passing to OLT after spectrum is cut apart that wavelength is synthetic again and handled.
Described OLT also comprises:
The SLED module: be provided with SLED and can use the light emission drive circuit of SLED, the SLED to described setting drives by the signal of telecommunication that sends, and the light emission drive circuit that utilizes described setting sends downlink optical signal after the modulation by this SLED.
As seen from the above technical solution provided by the invention, the present invention by in the ONU of WDM-PON system or ONT and OLT with the SLED (superradiation light-emitting diode) of cheapness as photo-emission source.Thereby can need not the complicated ring of light and return technology, make simplifying the structure of WDM-PON system, greatly reduce the cost of WDM-PON system, improve the reliability of WDM-PON system.
Description of drawings
Fig. 1 is the structural representation of WDM-PON;
Fig. 2 is the structural representation of the AWG among the WDM-PON of the prior art;
Fig. 3 returns the structural representation of the modulating system of technology for the available technology adopting ring of light;
Fig. 4 is the structural representation of the reflection laser among the ONT in the system shown in Figure 3;
Fig. 5 is the schematic diagram of the medical treatment scheme of available technology adopting tunable laser;
Fig. 6 is the process chart of the embodiment of the method for the invention;
Fig. 7 is the spectrogram of the SLED of certain model;
Fig. 8 is for adopting the structural representation of SLED as the optical sender of ONU of light source or ONT;
Fig. 9 is ONT sends a schematic diagram from the up-bound wide spectrum light signal to AWG;
Figure 10 is the schematic diagram of AWG with the light signal of the synthetic specific wavelength of up-bound wide spectrum light signal of the different wave length that receives;
Figure 11 is the structural representation of embodiment of the transmission system of WDM-PON of the present invention.
Embodiment
The invention provides transmission method and the system of a kind of WDM-PON, core of the present invention is: adopt the light source of cheap SLED as ONU in the WDM-PON system or ONT.
Describe the present invention in detail below in conjunction with accompanying drawing, the handling process of the embodiment of the method for the invention comprises the steps: as shown in Figure 6
Step 6-1, in ONU or ONT, SLED is set, and with the SLED that the is provided with photo-emission source as ONU or ONT.
The present invention at first need be provided with SLED in the optical sender of ONU in the WDM-PON system or ONT.SLED is a kind of high stable light source with high-output power, wide spectral range.Because its power output is bigger, can effectively improve the resolution of system.SLED can directly drive by the signal of telecommunication.
The spectrogram of the SLED of certain model as shown in Figure 7, SLED has very high luminous power on very wide spectrum as can be seen from Figure 7.
The present invention also need be provided with the light emission drive circuit of the SLED wide spectrum light source that can use direct modulation in ONU or ONT, according to this light emission drive circuit, ONU or ONT as its photo-emission source, and directly drive by the signal of telecommunication that sends the SLED that is provided with to this SLED.Adopt SLED as shown in Figure 8 as the structural representation of the optical sender of ONU of light source or ONT.
Step 6-2, each ONU or ONT pass to the wave multiplexer or the channel-splitting filter at remote node place by the up-bound wide spectrum light signal of SLED emission, the wave multiplexer at remote node place or channel-splitting filter carry out the up-bound wide spectrum light signal that receives after spectrum cuts apart, and the light signal of synthetic specific wavelength passes to OLT again.
Each the road signal of OLT in the WDM-PON system forms monochromatic light road multiple wavelength optical signal by wave multiplexer and sends downwards, and the monochromatic light road multiple wavelength optical signal that far-end passes over OLT by channel-splitting filter carries out passing to each ONU or ONT after wavelength separated is handled.
In actual applications, can also SLED also is set and can use the light of the SLED wide spectrum light source of direct modulation to launch drive circuit at the OLT of WDM-PON end, OLT utilizes this light emission drive circuit to send the wide range downlink optical signal by the wave multiplexer or the channel-splitting filter of this SLED in OLT then.
Described each ONU or ONT utilize the light emission drive circuit of described setting to send the up-bound wide spectrum light signal by the wave multiplexer or the channel-splitting filter of described SLED to the remote node place, and the wave multiplexer at this remote node place or channel-splitting filter can be realized by AWG.Be that example illustrates the present invention below with AWG.
Comprise among the AWG and each ONU or ONT corresponding input end mouth, this input port can only be by the light signal of specific wavelength.Each ONU or ONT pass to AWG by the up-bound wide spectrum light signal of SLED emission by each input port.AWG carries out the spectrum dividing processing by input port to this up-bound wide spectrum light signal.The schematic diagram that ONT sends the up-bound wide spectrum light signal to AWG as shown in Figure 9.
AWG carries out to having carried out uplink optical signal after the spectrum dividing processing that wavelength is synthetic to be handled again, will carry out the light signal of the synthetic specific wavelength of uplink optical signal after the spectrum dividing processing after, pass to OLT.AWG with the schematic diagram of the light signal of the synthetic specific wavelength of up-bound wide spectrum light signal of the different wave length that receives as shown in figure 10.
The structural representation of the embodiment of the transmission system of WDM-PON of the present invention comprises as shown in figure 11 as lower module:
OLT: as photo-emission source, send downlink optical signal to AWG by SLED with SLED.Receive the uplink optical signal of the specific wavelength behind synthetic that AWG passes over.Comprise the SLED module among the OLT.Comprise SLED in the SLED module and can use the light of the SLED wide spectrum light source of direct modulation to launch drive circuit.OLT utilizes this light emission drive circuit to send downlink optical signal by this SLED to AWG.
AWG: have the function that spectrum is cut apart and synthesized.The downlink optical signal that OLT is passed over carries out passing to each ONU or ONT after the spectrum dividing processing.The up-bound wide spectrum light signal that each ONU or ONT are passed over carries out that spectrum is cut apart, wavelength is synthetic passes to OLT after handling.AWG comprises: spectrum is cut apart module and spectrum synthesis module.
Wherein, spectrum is cut apart module: after the downlink optical signal that the OLT that receives is passed over carries out the spectrum dividing processing, pass to each ONU or ONT.
Wherein, spectrum synthesis module: comprise and each ONU or ONT corresponding input end mouth, receive the up-bound wide spectrum light signal of each ONU or ONT emission, the up-bound wide spectrum light signal that receives is carried out the spectrum dividing processing by this input port.Then, will carry out the light signal of the synthetic specific wavelength of uplink optical signal after the spectrum dividing processing again, pass to OLT.
ONU or ONT: as photo-emission source, send the up-bound wide spectrum light signal to AWG by SLED with SLED.Receive the downlink optical signal that AWG passes over.Comprise the SLED module among ONU or the ONT.Comprise SLED in the SLED module and can use the light of the SLED wide spectrum light source of direct modulation to launch drive circuit.ONU or ONT utilize this light emission drive circuit to send the up-bound wide spectrum light signal by this SLED to AWG.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (11)

1, a kind of transmission method of EPON of wavelength division multiplexing is characterized in that, comprises step:
A, in the optical network unit ONU of the EPON WDM-PON of wavelength division multiplexing or Optical Network Terminal ONT, superradiation light-emitting diode SLED is set;
B, described ONU or ONT as its photo-emission source, send the up-bound wide spectrum light signal with the SLED of described setting.
2, method according to claim 1 is characterized in that, described steps A specifically comprises:
SLED is set in ONU in the WDM-PON system or the optical sender of ONT and can uses the light of SLED to launch drive circuit.
3, method according to claim 1 and 2 is characterized in that, described step B specifically comprises:
Described ONU or ONT receive the downlink optical signal from local side apparatus OLT, and ONU or ONT as its photo-emission source, send the up-bound wide spectrum light signal with the SLED of described setting, and this wide range light signal is handled the back through wave multiplexer or channel-splitting filter and arrived OLT.
4, method according to claim 3 is characterized in that, the up-bound wide spectrum modulation signal that described ONU or ONT upwards send is by directly modulating acquisition to SLED.
5, method according to claim 3 is characterized in that, described step B specifically comprises:
Each the road signal of OLT in B1, the WDM-PON system forms monochromatic light road multiple wavelength optical signal by wave multiplexer and sends downwards, and the monochromatic light road multiple wavelength optical signal that far-end passes over OLT by channel-splitting filter carries out passing to each ONU or ONT after wavelength separated is handled;
B2, described each ONU or ONT utilize the light emission drive circuit of described setting to send the up-bound wide spectrum light signal by the wave multiplexer or the channel-splitting filter of described SLED to the remote node place, this wave multiplexer or channel-splitting filter carry out the up-bound wide spectrum light signal that receives to pass to OLT after spectrum cuts apart that wavelength is synthetic again and handle.
6, method according to claim 5 is characterized in that, described step B1 also comprises:
SLED is set in the optical sender of the OLT in the WDM-PON system and can uses the light of SLED to launch drive circuit, OLT utilizes this light emission drive circuit to send the wide range downlink optical signal by the wave multiplexer or the channel-splitting filter of this SLED in OLT.
7, method according to claim 5 is characterized in that, described wave multiplexer of described step B2 or channel-splitting filter comprise: Arrayed Waveguide Grating AWG.
8, method according to claim 7 is characterized in that, described step B2 specifically comprises:
In AWG, be provided with and each ONU or ONT corresponding input end mouth, each ONU or ONT pass to AWG by the up-bound wide spectrum light signal of SLED emission by this input port, AWG carries out the up-bound wide spectrum light signal that receives to pass to OLT after spectrum cuts apart that wavelength is synthetic again and handle.
9, a kind of transmission system of EPON of wavelength division multiplexing is characterized in that, comprising:
OLT: send downlink optical signal to the wave multiplexer at remote node place or channel-splitting filter, the uplink optical signal that the wave multiplexer at receiving remote node place or channel-splitting filter pass over after synthetic;
The wave multiplexer at remote node place or channel-splitting filter: have the function that spectrum is cut apart and synthesized, the downlink optical signal that OLT is passed over carries out passing to each ONU or ONT after the spectrum dividing processing, and the uplink optical signal that each ONU or ONT are passed over carries out passing to OLT after spectrum is cut apart that wavelength is synthetic again and handled;
ONU or ONT: be provided with SLED and can use the light of SLED to launch drive circuit, SLED to described setting drives by the signal of telecommunication that sends, utilizes the light emission drive circuit of described setting to send the up-bound wide spectrum light signal by the wave multiplexer or the channel-splitting filter of this SLED to the remote node place.
10, system according to claim 9 is characterized in that, the wave multiplexer or the channel-splitting filter at described remote node place specifically comprise:
Spectrum is cut apart module: the downlink optical signal that the OLT that receives is passed over carries out passing to each ONU or ONT after wavelength separated handles;
Spectrum synthesis module: comprise and each ONU or ONT corresponding input end mouth, receive the up-bound wide spectrum light signal of each ONU or ONT emission by this input port, the up-bound wide spectrum light signal that receives is carried out passing to OLT after spectrum is cut apart that wavelength is synthetic again and handled.
11, according to claim 9 or 10 described systems, it is characterized in that described OLT also comprises:
The SLED module: be provided with SLED and can use the light emission drive circuit of SLED, the SLED to described setting drives by the signal of telecommunication that sends, and the light emission drive circuit that utilizes described setting sends downlink optical signal after the modulation by this SLED.
CN 200610058451 2006-03-24 2006-03-24 Transmission method and system for wavelength-division multiplexed passive optical network Active CN101043287B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN 200610058451 CN101043287B (en) 2006-03-24 2006-03-24 Transmission method and system for wavelength-division multiplexed passive optical network
PCT/CN2007/000413 WO2007109958A1 (en) 2006-03-24 2007-02-07 A stransmission method, device and system for wdm-pon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200610058451 CN101043287B (en) 2006-03-24 2006-03-24 Transmission method and system for wavelength-division multiplexed passive optical network

Publications (2)

Publication Number Publication Date
CN101043287A true CN101043287A (en) 2007-09-26
CN101043287B CN101043287B (en) 2012-02-22

Family

ID=38540791

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200610058451 Active CN101043287B (en) 2006-03-24 2006-03-24 Transmission method and system for wavelength-division multiplexed passive optical network

Country Status (2)

Country Link
CN (1) CN101043287B (en)
WO (1) WO2007109958A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103345281A (en) * 2013-06-27 2013-10-09 上海亨通宏普通信技术有限公司 Temperature control device of high reliable wavelength division array optical waveguide
CN102710361B (en) * 2012-06-01 2015-09-30 华为技术有限公司 A kind of distributed base station signal transmission system and communication system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114339486B (en) * 2021-12-17 2024-02-27 中国电子科技集团公司第四十四研究所 Time-frequency signal optical fiber network distribution and transmission method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7254332B2 (en) * 2002-08-06 2007-08-07 Jun-Kook Choi Wavelength division multiplexing passive optical network system
US20040126112A1 (en) * 2002-12-12 2004-07-01 Kim Byoung Whi Method for optically copying packet
KR100520604B1 (en) * 2003-01-15 2005-10-10 삼성전자주식회사 Wavelength division multiplexed light source and system for passive optical network wsing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102710361B (en) * 2012-06-01 2015-09-30 华为技术有限公司 A kind of distributed base station signal transmission system and communication system
US9479254B2 (en) 2012-06-01 2016-10-25 Huawei Technologies Co., Ltd. Distributed base station signal transmission system and communication system
CN103345281A (en) * 2013-06-27 2013-10-09 上海亨通宏普通信技术有限公司 Temperature control device of high reliable wavelength division array optical waveguide
CN103345281B (en) * 2013-06-27 2015-11-25 江苏亨通光网科技有限公司 Temperature control device of high reliable wavelength division array optical waveguide

Also Published As

Publication number Publication date
CN101043287B (en) 2012-02-22
WO2007109958A1 (en) 2007-10-04

Similar Documents

Publication Publication Date Title
CN101009530B (en) Passive optical network, multiplexing/de-multiplexing device and method supporting the multicast service
Cvijetic et al. 100 Gb/s optical access based on optical orthogonal frequency-division multiplexing
EP1887724B1 (en) A wavelength division multiplexing passive optical network and its implement method
US8886043B2 (en) Optical network system, optical line terminal, optical network unit and optical distribution network apparatus
EP2209228B1 (en) An optical line terminal, a remote node unit, an optical transimission method and system thereof
CN1447552A (en) Wave-division multiplexing passive optical fiber network system
CN101119163B (en) WDM-PON method, system and optical line terminal for implementing multicast service
CN1741433A (en) Use the Optical Access Network and the EPON of wavelength division method
CN101032100A (en) Long-reach wavelength division multiplexing passive optical networks by using the position adjustment of broadband light source
CN1725721A (en) Passive optical network based on optical CDMA multitechnology
CN102695101B (en) EPON on a kind of wavelength division multiplexing
CN101167318A (en) Method and system for mitigating Raman crosstalk in an Ethernet passive optical network
KR100539926B1 (en) CDMA-PON by using Multi Carrier
CN101127571A (en) A public light source shared by WDM-PON system and method for light source sharing
CN101068129A (en) Method for realizing broadcasting and/or group broadcasting business in WDM-PON and system thereof
CN103109476A (en) Passive optical communication method, system, and optical line terminal
US20220158751A1 (en) System and methods for coherent optical extension
CN101060378A (en) A wave division multiple transmission system and method
Chen et al. The evolution trends of PON and key techniques for NG-PON
Qian et al. Optical OFDM transmission in metro/access networks
CN102238130A (en) OFDM (orthogonal frequency division multiplexing)-based WDM (wavelength division multiplexing)-PON (positive optical network) system and downlink data transmission method
CN101056155A (en) Optical source concentrated wave division multiplexing passive optical network for simultaneously generating the DPSK and OOK signals
CN101345599A (en) Upgrading method of time division multiple access passive optical network and passive optical network system
CN101043287A (en) Transmission method and system for wavelength-division multiplexed passive optical network
CN101075854A (en) Method and apparatus for realizing hybrid passive optical network based on WDM and TDM

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant