CN101043287B - 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
CN101043287B
CN101043287B CN 200610058451 CN200610058451A CN101043287B CN 101043287 B CN101043287 B CN 101043287B CN 200610058451 CN200610058451 CN 200610058451 CN 200610058451 A CN200610058451 A CN 200610058451A CN 101043287 B CN101043287 B CN 101043287B
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.)
Active
Application number
CN 200610058451
Other languages
Chinese (zh)
Other versions
CN101043287A (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

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 (VDSLs) of 56K to several million respectively.But, for various new business such as high-quality video information business, VoD (Videoon Demand, video request program) business are provided; The bandwidth that needs about 100M is carried out the transmission of data, and above-mentioned several kinds of 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 (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 is as shown in Figure 1, and 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 the WDM-PON network equipment is complicated, cost is 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 the same.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: the modulation scheme that adopts the ring of light technology of returning.The ring of light technology of returning is to utilize the downlink optical signal of a part of OLT as carrier wave, in ONU or ONT, is modulated to the wavelength that needs through reflection laser and amplifier, and the light signal after will modulating again sends to OLT.With OLT is example, and the structural representation of the modulating system of the employing ring of light technology of returning is as shown in Figure 3, and wherein the structural representation of the reflection laser among the ONT is as shown in Figure 4.
The modulation scheme of the above-mentioned employing ring of light technology of returning 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 in ONU or ONT, uses the modulator of integrated semiconductor image intensifer.The uplink and downlink signal will be through two fine transmission, with the interference of avoiding Rayleigh scattering to produce.
The shortcoming of the modulation scheme of the above-mentioned employing ring of light technology of returning 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 sketch map of this scheme is 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 realize through following technical scheme:
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 ONT Optical Network Terminal ONT, superradiation light-emitting diode SLED is set and uses the directly light emission drive circuit of the SLED wide spectrum light source of modulation, SLED is set in the optical sender of the OLT in the WDM-PON system and uses the directly light emission drive circuit of the SLED wide spectrum light source of modulation;
B, said OLT utilize light emission drive circuit to send the wide range downlink optical signal through the wave multiplexer or the channel-splitting filter of SLED in OLT, and said ONU or ONT as its photo-emission source, send the up-bound wide spectrum light signal with the SLED of said setting.
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 use the directly light emission drive circuit of the SLED wide spectrum light source of modulation; SLED to said setting drives through the signal of telecommunication that sends, utilizes the light emission drive circuit of said setting to send the up-bound wide spectrum light signal through the wave multiplexer or the channel-splitting filter of this SLED to the remote node place;
Described OLT also comprises:
SLED module: be provided with SLED and use the directly light emission drive circuit of the SLED wide spectrum light source of modulation; SLED to said setting drives through the signal of telecommunication that sends, and the light emission drive circuit that utilizes said setting sends the downlink optical signal after the modulation through this SLED.
Technical scheme by the invention described above provides can find out, the present invention through 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 is the structural representation of the modulating system of the available technology adopting ring of light technology of returning;
Fig. 4 is the structural representation of the reflection laser among the ONT in the system shown in Figure 3;
Fig. 5 is the sketch map 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 sketch map from the up-bound wide spectrum light signal to AWG;
Figure 10 is the sketch map 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 according to the 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 is as shown in Figure 6, comprises the steps:
Step 6-1, in ONU or ONT, SLED is set, and with the photo-emission source of the SLED that is provided with 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 through the signal of telecommunication.
The spectrogram of the SLED of certain model is as shown in Figure 7, and as can beappreciated from fig. 7 SLED has very high luminous power on very wide spectrum.
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 through 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 through 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 road signal of OLT in the WDM-PON system forms monochromatic light road multiple wavelength optical signal through wave multiplexer and sends downwards, and the monochromatic light road multiple wavelength optical signal that far-end passes over OLT through channel-splitting filter carries out passing to each ONU or ONT after wavelength separated is handled.
In practical application; The light emission drive circuit of SLED and the SLED wide spectrum light source that can use direct modulation can also also be set at the OLT of WDM-PON end, and OLT utilizes this light emission drive circuit to send the wide range downlink optical signal through the wave multiplexer or the channel-splitting filter of this SLED in OLT then.
Said each ONU or ONT utilize the light emission drive circuit of said setting to send the up-bound wide spectrum light signal through the wave multiplexer or the channel-splitting filter of said SLED to the remote node place, and the wave multiplexer at this remote node place or channel-splitting filter can be realized through AWG.Be that example is explained 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 through the light signal of specific wavelength.Each ONU or ONT pass to AWG through the up-bound wide spectrum light signal of SLED emission through each input port.AWG carries out the spectrum dividing processing through input port to this up-bound wide spectrum light signal.ONT is as shown in Figure 9 to the sketch map that AWG sends the up-bound wide spectrum light signal.
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 is shown in figure 10 with the sketch map of the light signal of the synthetic specific wavelength of up-bound wide spectrum light signal of the different wave length that receives.
The structural representation of the embodiment of the transmission system of WDM-PON according to the invention is shown in figure 11, comprises like lower module:
OLT: as photo-emission source, send downlink optical signal to AWG through 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.The light emission drive circuit that comprises SLED and the SLED wide spectrum light source that can use direct modulation in the SLED module.OLT utilizes this light emission drive circuit to send downlink optical signal through 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, the up-bound wide spectrum light signal through this input port each ONU of reception or ONT emission carries out the spectrum dividing processing to the up-bound wide spectrum light signal that receives.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 through SLED with SLED.Receive the downlink optical signal that AWG passes over.Comprise the SLED module among ONU or the ONT.The light emission drive circuit that comprises SLED and the SLED wide spectrum light source that can use direct modulation in the SLED module.ONU or ONT utilize this light emission drive circuit to send the up-bound wide spectrum light signal through this SLED to AWG.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is 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 (7)

1. the transmission method of the EPON of a 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 ONT Optical Network Terminal ONT, superradiation light-emitting diode SLED is set and uses the directly light emission drive circuit of the SLED wide spectrum light source of modulation, SLED is set in the optical sender of the OLT in the WDM-PON system and uses the directly light emission drive circuit of the SLED wide spectrum light source of modulation;
B, said OLT utilize light emission drive circuit to send the wide range downlink optical signal through the wave multiplexer or the channel-splitting filter of SLED in OLT, and said ONU or ONT as its photo-emission source, send the up-bound wide spectrum light signal with the SLED of said setting.
2. method according to claim 1 is characterized in that, described step B specifically comprises:
Said 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 said setting, and this wide range light signal is handled the back through wave multiplexer or channel-splitting filter and arrived OLT.
3. method according to claim 1 is characterized in that, described step B specifically comprises:
Each road signal of OLT in B1, the WDM-PON system forms monochromatic light road multiple wavelength optical signal through wave multiplexer and sends downwards, and the monochromatic light road multiple wavelength optical signal that far-end passes over OLT through channel-splitting filter carries out passing to each ONU or ONT after wavelength separated is handled;
B2, said each ONU or ONT utilize the light emission drive circuit of said setting to send the up-bound wide spectrum light signal through the wave multiplexer or the channel-splitting filter of said 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.
4. method according to claim 3 is characterized in that, described wave multiplexer of described step B2 or channel-splitting filter comprise: Arrayed Waveguide Grating AWG.
5. method according to claim 4 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 through the up-bound wide spectrum light signal of SLED emission through 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.
6. the transmission system of the EPON of a 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 use the directly light emission drive circuit of the SLED wide spectrum light source of modulation; SLED to said setting drives through the signal of telecommunication that sends, utilizes the light emission drive circuit of said setting to send the up-bound wide spectrum light signal through the wave multiplexer or the channel-splitting filter of this SLED to the remote node place;
Described OLT also comprises:
SLED module: be provided with SLED and use the directly light emission drive circuit of the SLED wide spectrum light source of modulation; SLED to said setting drives through the signal of telecommunication that sends, and the light emission drive circuit that utilizes said setting sends the downlink optical signal after the modulation through this SLED.
7. system according to claim 6 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; Through the up-bound wide spectrum light signal of this input port each ONU of reception or ONT emission, the up-bound wide spectrum light signal that receives is carried out passing to OLT after spectrum is cut apart the synthetic processing of wavelength again.
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 CN101043287A (en) 2007-09-26
CN101043287B true 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)

Families Citing this family (3)

* 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
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
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1481105A (en) * 2002-08-06 2004-03-10 Wave division multiroute multiplying passive optical network system
JP2004222304A (en) * 2003-01-15 2004-08-05 Samsung Electronics Co Ltd Wavelength division multiplexing light source, and passive optical subscriber network system using the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040126112A1 (en) * 2002-12-12 2004-07-01 Kim Byoung Whi Method for optically copying packet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1481105A (en) * 2002-08-06 2004-03-10 Wave division multiroute multiplying passive optical network system
JP2004222304A (en) * 2003-01-15 2004-08-05 Samsung Electronics Co Ltd Wavelength division multiplexing light source, and passive optical subscriber network system using the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Katsumi Iwatsuki等.Access and Metro Networks Based on WDM Technologies.《JOURNAL OF LIGHTWAVE TECHNOLOGY》.IEEE,2004,第22卷(第11期),第2624页左栏最后一段至第2626页左栏第一段，附图2，5. *

Also Published As

Publication number Publication date
CN101043287A (en) 2007-09-26
WO2007109958A1 (en) 2007-10-04

Similar Documents

Publication Publication Date Title
EP1887724B1 (en) A wavelength division multiplexing passive optical network and its implement method
Lee et al. Fiber to the home using a PON infrastructure
US20170317778A1 (en) TWDM Passive Network with Extended Reach and Capacity
KR100921797B1 (en) Wavelength Division Multiplexing - Passive Optical Network system
CN101009530B (en) Passive optical network, multiplexing/de-multiplexing device and method supporting the multicast service
CN101729949B (en) WDM PON device with dynamically allocable wavelengths
US8886043B2 (en) Optical network system, optical line terminal, optical network unit and optical distribution network apparatus
KR100785436B1 (en) Wavelength division multiplexing passive optical network for convergence broadcasting service and communication service
US7421206B2 (en) Optical transceiver for transmitting light source control information and optical network using the same
KR100975882B1 (en) Time division multiple access over wavelength division multiplexed passive optical network
KR100842290B1 (en) Wavelength conversion apparatus in TDM-PON system based on WDM system and optical transmission apparatus and method using the same
CN103354625B (en) The passive light network transmission system of the stacking wavelength-division and time-division multiplexing based on OFDM
CN102695101B (en) EPON on a kind of wavelength division multiplexing
WO2007143931A1 (en) A wavelena wavelength division multiplexing passive optical network
JP2008543213A (en) Wavelength division multiplexing passive optical network system
Gupta et al. Passive optical networks: Review and road ahead
Sundar et al. Performance investigation of 16/32-channel DWDM PON and long-reach PON systems using an ASE noise source
CN105721098B (en) The OLT in the symmetrical TWDM PON systems of high-speed transfer is realized with low speed optical device
CN101345599A (en) Upgrading method of time division multiple access passive optical network and passive optical network system
CN101043287B (en) Transmission method and system for wavelength-division multiplexed passive optical network
CN202004922U (en) Passive optical network system on wavelength division multiplexing
Kim et al. WDM-PON development and deployment as a present optical access solution
KR20050055098A (en) Wavelength division multiplexing - passive optical network system
US20140376912A1 (en) Optical access network
US20150372758A1 (en) Transmitting and receiving apparatus using wavelength-tunable filter and method thereof

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