CN101895795A - Optical network unit device for mutual-excitation multi-wavelength dynamic scheduling in passive optical network (PON) - Google Patents
Optical network unit device for mutual-excitation multi-wavelength dynamic scheduling in passive optical network (PON) Download PDFInfo
- Publication number
- CN101895795A CN101895795A CN2010101659431A CN201010165943A CN101895795A CN 101895795 A CN101895795 A CN 101895795A CN 2010101659431 A CN2010101659431 A CN 2010101659431A CN 201010165943 A CN201010165943 A CN 201010165943A CN 101895795 A CN101895795 A CN 101895795A
- Authority
- CN
- China
- Prior art keywords
- optical
- links
- optical circulator
- longitudinal mode
- wavelength
- 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
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The invention discloses an optical network unit device for mutual-excitation multi-wavelength dynamic scheduling in a passive optical network (PON), belonging to the technical field of optical communication. The optical network unit device comprises an uplink data transmitter, a downlink data receiver and an optical circulator, wherein the output end of the optical circulator is connected with the uplink data transmitter so as to transmit downlink data optical signals, and the input end of the optical circulator is connected with the uplink data transmitter so as to transmit uplink data optical signals; and the uplink data transmitter comprises two FP multi-longitudinal model lasers with the same model intervals, an adjustable band-pass filter, two optical circulator, an optical splitting and coupling device and a control module. Based on the mutual-excitation working mode of two FP multi-longitudinal model lasers, the invention can dynamically generate uplink optical carrier with adjustable multi-wavelength, flexibly and effectively share all uplink wavelength resources, improve the utilization rate of the uplink wavelength resources, has simple structure and low cost, and meet the development requirement on rapid increase of user uplink access capability.
Description
Technical field
What the present invention relates to is the device in a kind of optical communication technique field, specifically is the optical network unit apparatus of mutual excitation multi-wavelength dynamic scheduling in a kind of EPON.
Background technology
In recent years, EPON (passive optical network, PON) technical development is ripe gradually, extensively lay in states such as the U.S., Korea S, Japan, be acknowledged as the best broadband access scheme of FTTH (the Fiber To The Home) network architecture that solves that Fiber to the home, lot of domestic and foreign research institution and communication enterprise have all dropped into strength and have researched and developed.Along with the bandwidth intensive business, as video conference (videoconference), HDTV (High-Definition Television) (HDTV), video request program (VoD) etc., or Distributed Calculation is applied in the extensive use in the optical access network, user side optical network unit apparatus (Optical Network Unit, ONU) require up average access bandwidth to reach Gigabits per second at least, and the common obtainable average upstream bandwidth of ONU user has only tens per seconds (EPON:60Mbps at present, BPON:20Mbps, GPON:40Mbps), can't satisfy the requirement of those novel business.Therefore, providing a kind of novel low cost, high bandwidth, colourless ONU structure, is the necessary condition that realizes bandwidth intensive service application of future generation in optical access network.
Through existing literature search is found, people such as C.H.Yeh and C.W.Chow has delivered the article that is entitled as " Using four wavelength-multiplexed self-seeding Fabry-Perot lasers for 10Gbpsupstream traffic in TDM-PON (realizing the uplink service of 10Gps in the time division multiplexing EPON based on the autoexcitation FP-LD laser of four wavelength multiplexings) " on Optics Express 2008, propose a kind of simple 10Gpbs TDM-PON architecture.Use four identical lasers of Fabry-Perot cheaply (FP-LD) at the ONU place, adopt the autoexcitation mode to produce four kinds of different up wavelength (λ 1～λ 4) simultaneously, the upstream data of carrying 2.5Gbps on each autoexcitation carrier wave produces the 10Gpbs upstream and sends to optical line terminal OLT (Optical Line Terminal) behind wavelength division multiplexing.In confirmatory experiment, ONU holds the transmitter module of single wavelength channel by a fiber reflector (fiber reflected mirror, FRM), one 1 * 2 optical coupler (coupler, CP), and Polarization Controller (polarization controller, PC), (wavelength demux/mux WDM) forms with a Fabry-Perot laser (FP-LD) wavelength division multiplexer.The output of FP laser links to each other with the end of Polarization Controller PC, the other end of Polarization Controller PC links to each other with the end of wavelength division multiplexer WDM, the other end of wavelength division multiplexer WDM links to each other with the road port that closes of 1 * 2 optical coupler CP, 1 * 2 optical coupler CP one of them divide road port to link to each other with fiber reflector FRM, 1 * 2 optical coupler CP another minute road port is as output port and an optical circulator (optical circulator of this transmitter module, OC) link to each other, 2.5Gbps upstream data directly be modulated on the FP laser by biasing circuit, another port of optical circulator OC links to each other with the descending receiver module Rx of ONU.But, still send the multicarrier upstream data simultaneously owing to ONU in this technology according to time division multiplexing mode, no matter uplink service load size, ONU monopolizes all wavelength resources at a certain time slot, this mechanism is not taken the ascending load of each ONU reality into consideration, do not distribute two kinds of resources of time and wavelength flexibly effectively, thereby cause burst mode transceiver utilance not high.
Find again that by retrieval people such as M.Attyballe and Y.J.Wen deliver " Increasingupstream capacity in TDM-PON with multiple-wavelength transmission using Fabry-Perotlaser diodes (increasing the up-link capacity of time division multiplexing EPON based on the multi-wavelength transmission mechanism of FP-LD laser) " on Optics Express 2007.In this technology: optical line terminal OLT transmitting downstream data wavelength and a plurality of unmodulated seed wavelength are to ONU, in ONU, use selector and the burst mode modulator of single Fabry-Perot laser as the upgoing wave long-channel, pass through adjustment, allow the FP-LD zlasing mode be locked on some seed excitation wavelengths, modulation sends the upstream of 2.5Gbps, thereby realizes the dynamic access mechanism of ONU multi-wavelength.The transmitter module of ONU end only is made of the FP-LD laser that is subjected to adjustment control, and upstream data directly is modulated on the FP laser.But this Technology Need sends the seed excitation wavelength from local side OLT, and the power of locating through distant-end node RN (Remote Node) is cut apart and is sent to each ONU, and the power budget of seed exciting light source is comparatively nervous; And in order to realize the dynamic locked mode of FP LD, the ONU end points needs complicated temperature-control circuit, complex structure, and cost is higher.
Also find by retrieval, people such as T.Jayasinghe and C.J.Chae delivers " Scalability of RSOA-based multi-wavelength Ethernet PON architecture with dualfeeder fiber (having the extensibility research of double-fed lambda line optical fiber based on the multi-wavelength Ethernet optical-fiber network architecture of reflective semiconductor amplifier) " on Journal of Optical Networking 2007, a kind of multi-wavelength EPON structure of capacity smooth upgrade is proposed, in this structure, OLT sends one group of seed excitation light wave FLS, power through distant-end node RN is cut apart, send to each ONU, in ONU, use and utilize filter to leach required seed excitation light wave, and modulation sends upstream data based on reflecting light amplifier RSOA.The transmitter module of ONU end is made of optical filter filter and reflecting light amplifier RSOA, the output of reflecting light amplifier RSOA links to each other with the port of optical filter filter, another port of optical filter filter links to each other with the branch road port of group wavelength division multiplexing CWDM as the output port of this transmitter module, and upstream data directly is modulated on the reflecting light amplifier RSOA.But this Technology Need sends the seed excitation wavelength from local side OLT, cuts apart through the power at distant-end node place, is sent to each ONU, and than ONU autoexcitation transmission technology, complex structure, cost are higher.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, the optical network unit apparatus of mutual excitation multi-wavelength dynamic scheduling in a kind of EPON is provided.The present invention is by using two FP Multi-Longitudinal Mode lasers that mode spacing is identical, phase mutual excitation real estate is given birth to up light carrier, and use tunable filter, the excitation wavelength of the up light carrier of Dynamic Selection, increase the flexibility of uplink, improved up wavelength resource utilization, simple in structure, cost is low, helps bandwidth intensive business or Distributed Calculation to be applied in realization in the EPON.
The present invention is achieved by the following technical solutions:
The present invention includes: upstream data transmitter, downlink data receiver and the 3rd optical circulator, wherein: the output of the 3rd optical circulator transmitting downlink data light signal that links to each other with the downlink data receiver, the input of the 3rd optical circulator transmit ascending data light signal that links to each other with the upstream data transmitter.
Described upstream data transmitter produces the upstream data light signal, comprise: two FP Multi-Longitudinal Mode lasers, variable band-pass filter, two optical circulators, light shunt/coupler and control module, wherein: the output of a FP Multi-Longitudinal Mode laser links to each other with the input of variable band-pass filter and transmits many longitudinal modes light carrier, the control output end mouth of control module links to each other with variable band-pass filter and transmits the control signal of control passband centre wavelength, the output of variable band-pass filter links to each other with the I/O end of first optical circulator and transmits the single longitudinal mode light carrier, the output of first optical circulator links to each other with the input of second optical circulator and transmits the single longitudinal mode light carrier, the I/O end of second optical circulator links to each other with the output of the 2nd FP Multi-Longitudinal Mode laser and transmits single longitudinal mode upstream data light signal, the data-out port of the control module transmit ascending data signal of telecommunication that links to each other with the prevention at radio-frequency port of the 2nd FP Multi-Longitudinal Mode laser, the output of second optical circulator and light shunt/coupler close the road port transmission single longitudinal mode upstream data light signal that links to each other, a branch road port of light shunt/coupler links to each other with the input of first optical circulator and transmits single longitudinal mode upstream data light signal, and another minute road port of light shunt/coupler links to each other with the input of the 3rd optical circulator and transmits self-energizing single longitudinal mode upstream data light signal.
The mode spacing of described two FP Multi-Longitudinal Mode lasers is identical.
Described light shunt/coupler is that splitting ratio is 90: 10 1 * 2 a light shunt/coupler.
Described downlink data receiver recovers downlink data.
Described the 3rd optical circulator transmit ascending data light signal and downlink data light signal.
Compared with prior art, the present invention has following beneficial effect: have identical up multi-wavelength access capability, increased the uplink bandwidth of ONU greatly, share all up wavelength resources flexibly and effectively, improved up wavelength resource utilization, satisfied the growth requirement that the user uplink access capability sharply increases, the capacity upgrade scheme of this low cost, high efficiency, colorless ONU, for the development of optical access network of future generation provides a kind of technological reserve, help bandwidth intensive business or Distributed Calculation to be applied in realization in the EPON.
Description of drawings
Fig. 1 is that the structure of embodiment is formed schematic diagram;
Wherein: 1-the one FP Multi-Longitudinal Mode laser, 2-variable band-pass filter, 3-first optical circulator, 4-second optical circulator, 5-the 2nd FP Multi-Longitudinal Mode laser, 6-light shunt/coupler, 7-control module, 8-upstream data transmitter, 9-the 3rd optical circulator and 10-downlink data receiver.
Fig. 2 is embodiment figure as a result;
Wherein: (a) be two spectrograms that the FP Multi-Longitudinal Mode laser is freely exported in no autoexcitation; (b) be the optical power spectra figure that two FP Multi-Longitudinal Mode lasers are exported when mutual excitation; (c) be light carrier power output and the side mode suppression ratio that two FP Multi-Longitudinal Mode lasers produce when mutual excitation.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed execution mode and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As shown in Figure 1, present embodiment comprises: upstream data transmitter 8, downlink data receiver 10 and the 3rd optical circulator 9, wherein: the output of the 3rd optical circulator 9 transmitting downlink data light signal that links to each other with downlink data receiver 10, the input of the 3rd optical circulator 9 transmit ascending data light signal that links to each other with upstream data transmitter 8.
Described upstream data transmitter 8 produces the upstream data light signal, comprise: a FP Multi-Longitudinal Mode laser 1 and the 2nd FP Multi-Longitudinal Mode laser 5, variable band-pass filter 2, first optical circulator 3, second optical circulator 4, splitting ratio is 90: 10 1 * 2 light shunt/coupler 6 and a control module 7, wherein: the output of a FP Multi-Longitudinal Mode laser 1 links to each other with the input of variable band-pass filter 2 and transmits many longitudinal modes light carrier, the control port of control module 7 links to each other with variable band-pass filter 2 and transmits the signal of control passband centre wavelength, the output of variable band-pass filter 2 links to each other with the I/O end of first optical circulator 3 and transmits the single longitudinal mode light carrier, the output of first optical circulator 3 links to each other with the input of second optical circulator 4 and transmits the single longitudinal mode light carrier, the I/O end of second optical circulator 4 links to each other with the output of the 2nd FP Multi-Longitudinal Mode laser 5 and transmits single longitudinal mode upstream data light signal, the data-out port of the control module 7 transmit ascending data signal of telecommunication that links to each other with the prevention at radio-frequency port of the 2nd FP Multi-Longitudinal Mode laser 5, the output of second optical circulator 4 and splitting ratio be 90: 10 1 * 2 light shunt/coupler 6 close the road port transmission single longitudinal mode upstream data light signal that links to each other, splitting ratio is 10% fen road port of 90: 10 1 * 2 light shunt/coupler 6 transmission single longitudinal mode upstream data light signal that links to each other with the input of first optical circulator 3, and splitting ratio is that 90% fen road port of 90: 10 1 * 2 light shunt/coupler 6 links to each other with the input of the 3rd optical circulator 9 and transmits self-energizing single longitudinal mode upstream data light signal.
A described FP Multi-Longitudinal Mode laser 1 is identical with the mode spacing of the 2nd FP Multi-Longitudinal Mode laser 5, all is 1.34nm, and is biased in simultaneously under the room temperature environment of 28mA and 25 ℃.
Described control module 7 sends upstream data and sending controling instruction.
The three dB bandwidth of described variable band-pass filter 2 is 0.4nm, and the insertion loss is 3.5dB.
Described downlink data receiver 10 is photoelectric detectors, and it recovers downlink data.
The I/O end transmit ascending data light signal and the downlink data light signal of described the 3rd optical circulator 9.
The course of work of present embodiment is: in upstream data transmitter 8, the output of the one FP Multi-Longitudinal Mode laser 1 links to each other with the input of variable band-pass filter 2 and transmits many longitudinal modes light carrier, the control port of control module 7 transmission of control signals that links to each other with variable band-pass filter 2, according to this control signal, the single longitudinal mode light carrier (its centre wavelength be 1550.0nm) of dynamic adjustments variable band-pass filter 2 to leach appointment, the output of variable band-pass filter 2 links to each other with the I/O end of first optical circulator 3 and transmits the single longitudinal mode light carrier, the output of first optical circulator 3 links to each other with the input of second optical circulator 4 and transmits the single longitudinal mode light carrier, the I/O end of second optical circulator 4 links to each other with the output of the 2nd FP Multi-Longitudinal Mode laser 5, the data-out port of control module 7 links to each other with the prevention at radio-frequency port of the 2nd FP Multi-Longitudinal Mode laser 5 and transmits the 1.25Gbit/s upstream data signal of telecommunication, directly the upstream data signal of telecommunication is modulated on this single longitudinal mode light carrier of being excited, thereby produces 1.25Gbit/s upstream data light signal.The output of second optical circulator 4 and splitting ratio be 90: 10 1 * 2 light shunt/coupler 6 close the road port transmission single longitudinal mode upstream data light signal that links to each other, 10% fen road port of 1 * 2 light shunt/coupler 6 links to each other with the input of first optical circulator 3 and transmits single longitudinal mode upstream data light signal, like this, first optical circulator 3, second optical circulator 4 and 1 * 2 light shunt/coupler 6 constitute a fiber optic loop, this single longitudinal mode upstream data light signal is through this fiber optic loop, former road turns back to first ring of light device 3, a variable band-pass filter 2 and a FP Multi-Longitudinal Mode laser 1, form mutual excitation thus between a FP Multi-Longitudinal Mode laser 1 and the 2nd FP Multi-Longitudinal Mode laser 5,90% fen road port of 1 * 2 light shunt/coupler 6 links to each other with the input of the 3rd optical circulator 9 and transmits self-energizing single longitudinal mode upstream data light signal.
Two FP Multi-Longitudinal Mode lasers are that 28mA, temperature are under 25 ℃ of room temperature environments at bias current in the present embodiment, the spectrogram that no autoexcitation (without self-seeding) is freely exported is 1.34nm by the mode spacing of visible many longitudinal modes among Fig. 2 (a) shown in Fig. 2 (a); Two FP Multi-Longitudinal Mode lasers under the mutual excitation situation, adjustable extent be 1544.7nm between the 1563.4nm, the optical power spectra figure of output is shown in Fig. 2 (b); (side-mode suppression ratio is SMSR) shown in Fig. 2 (c) for light carrier power output Power that mutual excitation produces in the wavelengthtunable scope and side mode suppression ratio.Present embodiment is that to obtain maximum power output on 1556.67nm and the 1546.0nm be 9.0dBm for-3.42dBm and minimum power output at wavelength respectively, and side mode suppression ratio SMSR is to obtain maximum on the 1556.67nm at wavelength also, and this maximum is 71.43dB.
Claims (4)
1. the optical network unit apparatus of mutual excitation multi-wavelength dynamic scheduling in the EPON, comprise: upstream data transmitter, downlink data receiver and the 3rd optical circulator, it is characterized in that, the output of the 3rd optical circulator transmitting downlink data light signal that links to each other with the downlink data receiver, the input of the 3rd optical circulator transmit ascending data light signal that links to each other with the upstream data transmitter;
Described upstream data transmitter produces the upstream data light signal, comprise: two FP Multi-Longitudinal Mode lasers, variable band-pass filter, two optical circulators, light shunt/coupler and control module, wherein: the output of a FP Multi-Longitudinal Mode laser links to each other with the input of variable band-pass filter and transmits many longitudinal modes light carrier, the control output end mouth of control module links to each other with variable band-pass filter and transmits the control signal of control passband centre wavelength, the output of variable band-pass filter links to each other with the I/O end of first optical circulator and transmits the single longitudinal mode light carrier, the output of first optical circulator links to each other with the input of second optical circulator and transmits the single longitudinal mode light carrier, the I/O end of second optical circulator links to each other with the output of the 2nd FP Multi-Longitudinal Mode laser and transmits single longitudinal mode upstream data light signal, the data-out port of the control module transmit ascending data signal of telecommunication that links to each other with the prevention at radio-frequency port of the 2nd FP Multi-Longitudinal Mode laser, the output of second optical circulator and light shunt/coupler close the road port transmission single longitudinal mode upstream data light signal that links to each other, a branch road port of light shunt/coupler links to each other with the input of first optical circulator and transmits single longitudinal mode upstream data light signal, and another minute road port of light shunt/coupler links to each other with the input of the 3rd optical circulator and transmits self-energizing single longitudinal mode upstream data light signal.
2. the optical network unit apparatus of mutual excitation multi-wavelength dynamic scheduling is characterized in that in the EPON according to claim 1, and the mode spacing of described two FP Multi-Longitudinal Mode lasers is identical.
3. the optical network unit apparatus of mutual excitation multi-wavelength dynamic scheduling is characterized in that in the EPON according to claim 1, and described light shunt/coupler is that splitting ratio is 90: 10 1 * 2 a light shunt/coupler.
4. the optical network unit apparatus of mutual excitation multi-wavelength dynamic scheduling is characterized in that in the EPON according to claim 1, and described downlink data receiver is a photoelectric detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101659431A CN101895795B (en) | 2010-05-07 | 2010-05-07 | Optical network unit device for mutual-excitation multi-wavelength dynamic scheduling in passive optical network (PON) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101659431A CN101895795B (en) | 2010-05-07 | 2010-05-07 | Optical network unit device for mutual-excitation multi-wavelength dynamic scheduling in passive optical network (PON) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101895795A true CN101895795A (en) | 2010-11-24 |
| CN101895795B CN101895795B (en) | 2012-09-19 |
Family
ID=43104834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101659431A Expired - Fee Related CN101895795B (en) | 2010-05-07 | 2010-05-07 | Optical network unit device for mutual-excitation multi-wavelength dynamic scheduling in passive optical network (PON) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101895795B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015143730A1 (en) * | 2014-03-28 | 2015-10-01 | 武汉光迅科技股份有限公司 | Method for monitoring wavelength of turnable laser device of client by means of local side optical line terminal |
| CN105264794A (en) * | 2013-06-28 | 2016-01-20 | 华为技术有限公司 | Information processing method and device |
| CN112602331A (en) * | 2018-10-02 | 2021-04-02 | 华为技术有限公司 | Transceiving with predetermined frequency spacing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020179912A1 (en) * | 2001-01-08 | 2002-12-05 | Lightbit Corporation, A Corporation Of The State Of Delaware | Polarization-insensitive integrated wavelength converter |
| CN101303507A (en) * | 2006-12-01 | 2008-11-12 | 华中科技大学 | Full optical wavelength converting device based on non-linear optical waveguide |
-
2010
- 2010-05-07 CN CN2010101659431A patent/CN101895795B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020179912A1 (en) * | 2001-01-08 | 2002-12-05 | Lightbit Corporation, A Corporation Of The State Of Delaware | Polarization-insensitive integrated wavelength converter |
| CN101303507A (en) * | 2006-12-01 | 2008-11-12 | 华中科技大学 | Full optical wavelength converting device based on non-linear optical waveguide |
Non-Patent Citations (2)
| Title |
|---|
| 《OPTICS EXPRESS》 20081110 Chien-Hung Yeh et al Using four wavelength-multiplexed self-seeding Fabry-Perot lasers for 10 Gbps upstream traffic in TDM-PON 第1-6页 1-4 第16卷, 第23期 * |
| 《高技术通讯》 20080831 李同伟等 一种改进的空分交换型OPS节点结构及其性能分析 第778-782页 1-4 第18卷, 第8期 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264794A (en) * | 2013-06-28 | 2016-01-20 | 华为技术有限公司 | Information processing method and device |
| CN105264794B (en) * | 2013-06-28 | 2018-01-23 | 华为技术有限公司 | Information processing method and information processor |
| WO2015143730A1 (en) * | 2014-03-28 | 2015-10-01 | 武汉光迅科技股份有限公司 | Method for monitoring wavelength of turnable laser device of client by means of local side optical line terminal |
| US9991954B2 (en) | 2014-03-28 | 2018-06-05 | Accelink Technologies Co., Ltd. | Method for monitoring wavelength of tunable laser on user end by optical line terminal on local end |
| CN112602331A (en) * | 2018-10-02 | 2021-04-02 | 华为技术有限公司 | Transceiving with predetermined frequency spacing |
| CN112602331B (en) * | 2018-10-02 | 2022-08-19 | 华为技术有限公司 | Transmitting and receiving method and device with preset frequency interval |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101895795B (en) | 2012-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kani | Enabling technologies for future scalable and flexible WDM-PON and WDM/TDM-PON systems | |
| Feldman et al. | An evaluation of architectures incorporating wavelength division multiplexing for broad-band fiber access | |
| CN101729146B (en) | Self-excitation multi-wavelength dynamically dispatched optical network unit in passive optical network | |
| US8543001B2 (en) | Cascaded injection locking of fabry-perot laser for wave division multiplexing passive optical networks | |
| TWI452852B (en) | Optical transceivers and wavelength division multiplexing passive optical network system | |
| US7073956B1 (en) | Optical transceiver and passive optical network using the same | |
| US20100278535A1 (en) | Wavelength division multiplexing-passive optical network using external seed light source | |
| EP2732514B1 (en) | Laser array mux assembly with external reflector for providing a selected wavelength or multiplexed wavelengths | |
| EP2904726B1 (en) | Wdm system with externally modulated filtered laser array | |
| JP2010507313A (en) | OLT and ONU apparatus and method for wavelength independent WDM passive optical network | |
| CN101127571A (en) | A public light source shared by WDM-PON system and method for light source sharing | |
| CN102724012A (en) | Light-source-shared WDM-PON (wavelength division multiplexed passive optical network) system based on suppressed carrier modulation technique | |
| KR20100092853A (en) | A transmission device of low-noise light signals having a low-noise multi-wavelength light source, a transmission device of broadcast signals using a low-noise multi-wavelength light source, and an optical access network having the same | |
| CN102511138B (en) | Dimmable transceiver, passive optical network system and device | |
| WO2007143931A1 (en) | A wavelena wavelength division multiplexing passive optical network | |
| CN101662707B (en) | Method and device for sharing broadband light source in a plurality of WDM-PON systems | |
| US9287987B2 (en) | Self-seeded colorless burst-mode transmitter using reflective semiconductor optical amplifier and injection locked Fabry-Perot laser | |
| CN101719804A (en) | Method and device for implementing colorless ONU in wavelength division multiplexing passive optical network | |
| Grobe et al. | PON Evolution from TDMA to WDM-PON | |
| KR101103686B1 (en) | System of wavelength division multiplexing passive optical network, and data transfer method thereof | |
| CN101895795B (en) | Optical network unit device for mutual-excitation multi-wavelength dynamic scheduling in passive optical network (PON) | |
| Chowdhury et al. | A survivable protection and restoration scheme using wavelength switching of integrated tunable optical transmitter for high throughput WDM-PON system | |
| US20170040774A1 (en) | Extended cavity fabry-perot laser assembly capable of high speed optical modulation with narrow mode spacing and wdm optical system including same | |
| KR20110052496A (en) | Anti-reflection coated quantum dot resonator for wavelength division multiplexing optical communication | |
| Park et al. | Recent research activities of WDM-PON in Korea |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20150507 |
|
| EXPY | Termination of patent right or utility model |