CN102098106B - Optical line terminal for wavelength division multiplexing-time division multiplexing passive optical network - Google Patents
Optical line terminal for wavelength division multiplexing-time division multiplexing passive optical network Download PDFInfo
- Publication number
- CN102098106B CN102098106B CN201110043629.0A CN201110043629A CN102098106B CN 102098106 B CN102098106 B CN 102098106B CN 201110043629 A CN201110043629 A CN 201110043629A CN 102098106 B CN102098106 B CN 102098106B
- Authority
- CN
- China
- Prior art keywords
- burst
- control circuit
- optical
- micro
- division multiplexing
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The invention relates to an optical line terminal for a wavelength division multiplexing-time division multiplexing passive optical network. The optical line terminal comprises an optical sub-assembly, a continuous mode transmitter control circuit, a burst mode receiver control circuit, and a micro control unit, wherein the continuous mode transmitter control circuit is connected with the optical sub-assembly, and controls the light-emitting state of the optical sub-assembly; the burst mode receiver control circuit is connected with the optical sub-assembly to provide a working voltage for the optical sub-assembly, and receives an electrical signal of the optical sub-assembly; and both the continuous mode transmitter control circuit and the burst mode receiver control circuit are connected with the micro control unit, and are controlled and monitored by the micro control unit. The optical line terminal has the continuous mode transmitter control circuit for transmitting the optical signal and the burst mode receiver control circuit for processing the burst uplink optical signal, and is applied to a wavelength division multiplexing-time division multiplexing (WDM-TDM) passive optical network. Compared with the method for improving the bandwidth bottleneck by adopting the WDM simply, the optical line terminal for the wavelength division multiplexing-time division multiplexing passive optical network has lower cost.
Description
[technical field]
The present invention relates to passive optical-fiber network, especially relate to a kind of optical line terminal of wavelength division multiplexing-time division multiplexing passive optical-fiber network.
[background technology]
Passive optical network technique is widely accepted as this fact of one preferred technique of Optical Access Network.At present, the main way of realization of passive optical network technique is time division multiplexing mode, instant division multiplexing passive optical network network (TDM PON).
The up employing time division multiplexing of TDM PON, each optical network unit (ONU) of user side is uploaded light signal at assigned timeslot, does not interfere with each other each other.The descending employing broadcast type of TDM-PON, each ONU can only identify the message segment of respective identifier in the continuous light signal that optical line terminal (OLT) passes down.
In TDM-PON, the most widely used is EPON and two kinds of technology of GPON.EPON adopts the speed of the symmetrical 1.25G/s of up-downgoing to transmit, and GPON adopts up 1.25G/s, and descending 2.5G/s speed is transmitted, and for two kinds of technological means, terminal use's bandwidth is all shared.Along with reasons such as the quantity growth of day by day demand data amount and home-use HDTV (High-Definition Television), the bandwidth of sharing descending 2.5G/s has been difficult to meet present requirement.For meeting the demand of this big data quantity, two kinds of technical schemes are proposed gradually in passive optical network technique field: 10G EPON and Wave division multiplexing passive optical network (WDM PON).
WDM PON adopts wavelength-division multiplex technique, and each terminal all can be enjoyed independent bandwidth, is no longer shared.Because can realizing fiber optic network, WDM PON technology and TDM PON technology share, and only need local side and terminal node place to use array waveguide grating (Arrayed Waveguide Grating, the light multiplex/demultiplex Passive Optical Components such as AWG), therefore aspect technology upgrading, substantially can realize smooth upgrade, without the enforcement of infrastructure project.But WDM PON technology but exists certain cost pressure, is mainly derived from optical assembly.
[summary of the invention]
Based on this, be necessary to provide a kind of optical line terminal of the passive optical-fiber network of wavelength division multiplexing-time division multiplexing cheaply.
A kind of optical line terminal of wavelength division multiplexing-time division multiplexing passive optical-fiber network, comprise optical assembly, continuous mode transmitter control circuit, burst-mode receiver control circuit and micro-control unit, described continuous mode transmitter control circuit is connected and controls the luminance of optical assembly with optical assembly; Described burst-mode receiver control circuit and optical assembly are connected to optical assembly provides operating voltage, and receives the signal of telecommunication of optical assembly; Described continuous mode transmitter control circuit is all connected with described micro-control unit with burst-mode receiver control circuit, is subject to control and the monitoring of micro-control unit.
Preferably, described optical assembly adopts two fine transmitting-receiving structures, comprise refrigeration mode distributed feedback utilizing emitted light assembly and burst-mode receiver optical assembly, described refrigeration mode distributed feedback utilizing emitted light assembly comprises distributed feedback laser and refrigeration module, and described burst-mode receiver optical assembly comprises avalanche diode and trans-impedance amplifier; Described distributed feedback laser is connected with continuous mode transmitter control circuit, be subject to continuous mode transmitter control circuit control utilizing emitted light signal, described refrigeration module is connected with continuous mode transmitter control circuit, is worked according to the working temperature control refrigeration module of setting by continuous mode transmitter control circuit; Described burst-mode receiver optical assembly is connected with burst-mode receiver control circuit, and light signal burst-mode receiver optical assembly being received by burst-mode receiver control circuit is processed.
Preferably, described continuous mode transmitter control circuit comprises laser driver and temperature-control circuit: described laser driver is connected with distributed feedback laser and micro-control unit, for distributed feedback laser provides drive current and monitored and controlled the size of drive current by micro-control unit; Described temperature-control circuit is connected with refrigeration module and micro-control unit, controls the operating state of refrigeration module and the working point of refrigeration module is set by micro-control unit.
Preferably, described burst-mode receiver control circuit comprises burst mode receiver, limiting amplifier, signal deteching circuit, burst received optical power observation circuit and avalanche diode booster circuit: described burst mode receiver is connected with burst-mode receiver optical assembly, for recovering the signal of telecommunication of described burst-mode receiver optical assembly output; Described limiting amplifier is connected with burst mode receiver, and the described signal of telecommunication is amplified and exported; Described signal deteching circuit is connected with limiting amplifier, for detection of and output burst luminous signal state; Described avalanche diode booster circuit is connected with avalanche diode and micro-control unit, for avalanche diode provides normal working voltage, and by the output voltage level of micro-control unit controls avalanche diode booster circuit; Described burst received optical power observation circuit is connected with avalanche diode booster circuit and micro-control unit, and sampling keeps avalanche diode photoelectric current, and sends the size of the luminous power of burst reception to micro-control unit.
Preferably, described optical assembly adopts single fiber transmitting-receiving structure, comprise refrigeration mode distributed feedback emission tube core, burst-mode receiver tube core and wavelength division multiplexer, described refrigeration mode distributed feedback utilizing emitted light assembly comprises distributed feedback laser and refrigeration module, described burst-mode receiver optical assembly comprises avalanche diode and trans-impedance amplifier: described distributed feedback laser is connected with continuous mode transmitter control circuit, be subject to continuous mode transmitter control circuit control utilizing emitted light signal, described refrigeration module is connected with continuous mode transmitter control circuit, worked according to the working temperature control refrigeration module of setting by continuous mode transmitter control circuit, described trans-impedance amplifier is connected with burst-mode receiver control circuit, by burst-mode receiver control circuit, the signal of telecommunication of trans-impedance amplifier output is processed, the complete transmission of light signal that described wavelength division multiplexer sends distributed feedback laser is exported, and the light signal receiving is reflexed to the photosurface of avalanche diode.
Preferably, described continuous mode transmitter control circuit comprises laser driver and temperature-control circuit: described laser driver is connected with distributed feedback laser and micro-control unit, for distributed feedback laser provides drive current and monitored and controlled the size of drive current by micro-control unit; Described temperature-control circuit is connected with refrigeration module and micro-control unit, controls the operating state of refrigeration module and the working point of refrigeration module is set by micro-control unit.
Preferably, described burst-mode receiver control circuit comprises burst mode receiver, limiting amplifier, signal deteching circuit, burst received optical power observation circuit and avalanche diode booster circuit: described burst mode receiver is connected with burst-mode receiver tube core, the signal of telecommunication of exporting for recovering the trans-impedance amplifier of described optical assembly; Described limiting amplifier is connected with burst mode receiver, and the described signal of telecommunication is amplified and exported; Described signal deteching circuit is connected with limiting amplifier, for detection of and output burst luminous signal state; Described avalanche diode booster circuit is connected with described avalanche diode and micro-control unit, for avalanche diode provides normal working voltage, and by the output voltage level of micro-control unit controls avalanche diode booster circuit; Described burst received optical power observation circuit is connected with avalanche diode booster circuit and micro-control unit, and sampling keeps avalanche diode photoelectric current, and sends the size of the luminous power of burst reception to micro-control unit.
Above-mentioned optical line terminal has the continuous mode transmitter control circuit of utilizing emitted light signal and has the burst-mode receiver control circuit of processing burst uplink optical signal, it is applied to the passive optical network of WDM carrying TDM, with respect to utilizing merely WDM to improve the mode of bandwidth bottleneck, there is lower cost.
[accompanying drawing explanation]
Fig. 1 is the systematic schematic diagram of WDM-TDM EPON;
Fig. 2 is the module map of the optical line terminal of the wavelength division multiplexing-time division multiplexing passive optical-fiber network of an embodiment;
Fig. 3 is the optical line terminal structure chart of a preferred embodiment;
Fig. 4 is the optical line terminal structure chart of an alternate embodiment.
[embodiment]
As shown in Figure 1, be the systematic schematic diagram of WDM-TDM EPON.WDM-TDM passive optical network comprises optical line terminal (the Optical Line Terminal of local side in system, and the optical network unit of user side (Optical Network Unit OLT), ONU), between OLT and ONU, communicate to connect by multiplexing & demultiplexing device.This system is the implementation of a kind of WDM carrying TDM, is also the applied system of OLT of the present embodiment.In system, each WDM-TDM PON OLT optical module is descending takies a wavelength channel, carries out broadcast type transmission; Multichannel WDM-TDM PON ONU optical module occupies a wavelength channel and happens suddenly up after time division multiplexing.Use with demultiplexing Nodes and all use condensation wave to divide optical passive component in recovery, as array waveguide grating (Arrayed Waveguide Grating, AWG), high density Wave division multiplexing technology (Dense Wave Length Division Multiplexing, DWDM) passive optical module etc.
As shown in Figure 2, be the module map of the optical line terminal of the wavelength division multiplexing-time division multiplexing passive optical-fiber network of an embodiment.This optical line terminal comprises optical assembly (OSA) 100, continuous mode transmitter control circuit (Continuous Mode Transmitter Control Circuit) 200, burst-mode receiver control circuit (Burst Mode Receiver Control Circuit) 300 and micro-control unit (Micro Control Unit, MCU) 400.
Continuous mode transmitter control circuit 200 and optical assembly 100 are connected and control the luminance of optical assembly 100.Continuous mode transmitter control circuit 200 constantly produces light signal in a continuous manner, sends to multiplexing & demultiplexing device.The luminance of optical assembly 100 comprises the centre wavelength of luminous power, extinction ratio and light wave etc.
Burst-mode receiver control circuit 300 is connected with optical assembly 100, for optical assembly 100 provides operating voltage, and receives the signal of telecommunication of optical assembly 100.Burst-mode receiver control circuit 300 is for receiving and process the light signal of optical assembly 100 burst transfer.
Continuous mode transmitter control circuit 200 is all connected with micro-control unit 400 with burst-mode receiver control circuit 300, is subject to control and the monitoring of micro-control unit 400.
Based on WDM carrying TDM wavelength division multiplexing downlink broadcast, the time division multiplexing up mode of operation that happens suddenly, the optical line terminal of the present embodiment has the continuous mode transmitter control circuit 200 of utilizing emitted light signal and has the burst-mode receiver control circuit 300 of processing burst uplink optical signal, therefore can be for this WDM-TDM PON.
As shown in Figure 3, in a preferred embodiment, optical assembly 100 adopts two fine transmitting-receiving structures.Optical assembly 100 comprises refrigeration mode distributed feedback (Cooled Distribute Feedback, DFB) utilizing emitted light assembly 110 and burst-mode receiver optical assembly 120.Refrigeration mode distributed feedback utilizing emitted light assembly 110 comprises distributed feedback laser and refrigeration module, and burst-mode receiver optical assembly 120 comprises avalanche diode and trans-impedance amplifier.
The distributed feedback laser of refrigeration mode distributed feedback utilizing emitted light assembly 110 is connected with continuous mode transmitter control circuit 200, be subject to continuous mode transmitter control circuit control 200 utilizing emitted light signals, refrigeration module is connected with continuous mode transmitter control circuit 200, is freezed according to the working temperature control refrigeration module of setting by continuous mode transmitter control circuit 200.
Particularly, continuous mode transmitter control circuit 200 comprises laser driver 210 and temperature-control circuit 220.Wherein laser driver 210 is connected with refrigeration mode distributed feedback utilizing emitted light assembly 110 and micro-control unit 400, for the distributed feedback laser of distributed feedback utilizing emitted light assembly 110 provides drive current and monitored and controlled the size of drive current by micro-control unit 400.Temperature-control circuit 220 is connected with refrigeration module and micro-control unit, controls the operating state of refrigeration module and the working point of refrigeration module is set by micro-control unit 400.
Burst-mode receiver optical assembly 120 is connected with burst-mode receiver control circuit 300, and light signal burst-mode receiver optical assembly 120 being received by burst-mode receiver control circuit 300 is processed.
Particularly, burst-mode receiver control circuit 300 comprises burst mode receiver 310, limiting amplifier 320, signal deteching circuit 330, burst received optical power observation circuit 340 and avalanche diode booster circuit 350.Wherein burst mode receiver 310 is connected with the burst mode optical fiber receive module 120 of optical assembly 100, the signal of telecommunication of exporting for recovering the trans-impedance amplifier of optical assembly 100.Limiting amplifier 320 is connected with burst mode receiver 310, and the described signal of telecommunication is amplified and exported.Signal deteching circuit 330 is connected with limiting amplifier 320, for detection of and output burst luminous signal state.Avalanche diode booster circuit 350 is connected with described avalanche diode and micro-control unit, for avalanche diode provides normal working voltage, and by the output voltage level of micro-control unit controls avalanche diode booster circuit.Burst received optical power observation circuit 340 is connected with avalanche diode booster circuit 350 and micro-control unit 400, and sampling keeps avalanche diode photoelectric current, and the size of the luminous power receiving to micro-control unit 400 transmission bursts.
The operation principle of this optical line terminal is below described:
As shown in Figure 4, be the optical line terminal of another alternate embodiment.In the present embodiment, optical assembly 100 adopts single fiber transmitting-receiving structure, itself and above-described embodiment difference are: adopt refrigeration mode distributed feedback emission tube core (TO-CAN) utilizing emitted light signal, adopt burst-mode receiver tube core receiving optical signals, refrigeration mode distributed feedback emission tube core is all connected with WDM with burst-mode receiver tube core, and the light signal of up-downgoing all carries out multiplexing and demultiplexing by WDM.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (3)
1. an optical line terminal for wavelength division multiplexing-time division multiplexing passive optical-fiber network, is characterized in that, comprises optical assembly, continuous mode transmitter control circuit, burst-mode receiver control circuit and micro-control unit,
Described continuous mode transmitter control circuit is connected and controls the luminance of optical assembly with optical assembly;
Described burst-mode receiver control circuit and optical assembly are connected to optical assembly provides operating voltage, and receives the signal of telecommunication of optical assembly;
Described continuous mode transmitter control circuit is all connected with described micro-control unit with burst-mode receiver control circuit, is subject to control and the monitoring of micro-control unit;
Described optical assembly adopts two fine transmitting-receiving structures, comprise refrigeration mode distributed feedback utilizing emitted light assembly and burst-mode receiver optical assembly, described refrigeration mode distributed feedback utilizing emitted light assembly comprises distributed feedback laser and refrigeration module, and described burst-mode receiver optical assembly comprises avalanche diode and trans-impedance amplifier;
Described distributed feedback laser is connected with continuous mode transmitter control circuit, be subject to continuous mode transmitter control circuit control utilizing emitted light signal, described refrigeration module is connected with continuous mode transmitter control circuit, is worked according to the working temperature control refrigeration module of setting by continuous mode transmitter control circuit;
Described burst-mode receiver optical assembly is connected with burst-mode receiver control circuit, and light signal burst-mode receiver optical assembly being received by burst-mode receiver control circuit is processed;
Or,
Described optical assembly adopts single fiber transmitting-receiving structure, comprise refrigeration mode distributed feedback emission tube core, burst-mode receiver tube core and wavelength division multiplexer, refrigeration mode distributed feedback emission tube core is all connected with wavelength division multiplexer with burst-mode receiver tube core, and the light signal of up-downgoing all carries out multiplexing and demultiplexing by wavelength division multiplexer.
2. the optical line terminal of wavelength division multiplexing-time division multiplexing passive optical-fiber network as claimed in claim 1, is characterized in that, described continuous mode transmitter control circuit comprises laser driver and temperature-control circuit:
Described laser driver is connected with distributed feedback laser and micro-control unit, for distributed feedback laser provides drive current and monitored and controlled the size of drive current by micro-control unit;
Described temperature-control circuit is connected with refrigeration module and micro-control unit, controls the operating state of refrigeration module and the working point of refrigeration module is set by micro-control unit.
3. the optical line terminal of wavelength division multiplexing-time division multiplexing passive optical-fiber network as claimed in claim 1, it is characterized in that, described burst-mode receiver control circuit comprises burst mode receiver, limiting amplifier, signal deteching circuit, burst received optical power observation circuit and avalanche diode booster circuit:
Described burst mode receiver is connected with burst-mode receiver optical assembly, for recovering the signal of telecommunication of described burst-mode receiver optical assembly output;
Described limiting amplifier is connected with burst mode receiver, and the described signal of telecommunication is amplified and exported;
Described signal deteching circuit is connected with limiting amplifier, for detection of and output burst luminous signal state;
Described avalanche diode booster circuit is connected with avalanche diode and micro-control unit, for avalanche diode provides normal working voltage, and by the output voltage level of micro-control unit controls avalanche diode booster circuit;
Described burst received optical power observation circuit is connected with avalanche diode booster circuit and micro-control unit, and sampling keeps avalanche diode photoelectric current, and sends the size of the luminous power of burst reception to micro-control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110043629.0A CN102098106B (en) | 2011-02-22 | 2011-02-22 | Optical line terminal for wavelength division multiplexing-time division multiplexing passive optical network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110043629.0A CN102098106B (en) | 2011-02-22 | 2011-02-22 | Optical line terminal for wavelength division multiplexing-time division multiplexing passive optical network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102098106A CN102098106A (en) | 2011-06-15 |
| CN102098106B true CN102098106B (en) | 2014-05-21 |
Family
ID=44130991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110043629.0A Expired - Fee Related CN102098106B (en) | 2011-02-22 | 2011-02-22 | Optical line terminal for wavelength division multiplexing-time division multiplexing passive optical network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102098106B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104796800B (en) * | 2011-12-31 | 2018-06-08 | 青岛海信宽带多媒体技术有限公司 | Optical module and the passive optical network with the optical module |
| CN102761795B (en) * | 2012-07-10 | 2015-08-12 | 青岛海信宽带多媒体技术有限公司 | EPON and light fill system thereof |
| CN104604050B (en) * | 2014-06-30 | 2019-06-11 | 索尔思光电（成都）有限公司 | A kind of laser burst control circuitry and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729154A (en) * | 2008-11-03 | 2010-06-09 | 华为技术有限公司 | Method, device and system for realizing LR-PON |
| CN101959086A (en) * | 2009-07-15 | 2011-01-26 | 中兴通讯股份有限公司 | Time division multiplex and wavelength division multiplex coexisting passive optical network system and transmission method |
-
2011
- 2011-02-22 CN CN201110043629.0A patent/CN102098106B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729154A (en) * | 2008-11-03 | 2010-06-09 | 华为技术有限公司 | Method, device and system for realizing LR-PON |
| CN101959086A (en) * | 2009-07-15 | 2011-01-26 | 中兴通讯股份有限公司 | Time division multiplex and wavelength division multiplex coexisting passive optical network system and transmission method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102098106A (en) | 2011-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10148385B2 (en) | Optical port auto-negotiation method, optical module, central office end device, and terminal device | |
| KR100875922B1 (en) | Downlink optical transmitter and method using wavelength independent light source in WDM passive optical subscriber network, and optical line termination system using the same | |
| CN101946430B (en) | Wavelength division multiplexing-passive optical network system | |
| US20170317778A1 (en) | TWDM Passive Network with Extended Reach and Capacity | |
| CN1983906B (en) | Passive light network for wave duplexing and its realization | |
| KR100641414B1 (en) | Device and method for fault management in loop-back wavelength division multiplexing passive optical network | |
| EP2088696A1 (en) | Station-side terminator | |
| EP2243234A1 (en) | Passive optical network remote protocol termination | |
| Iannone et al. | Bi-directionally amplified extended reach 40Gb/s CWDM-TDM PON with burst-mode upstream transmission | |
| CN102695101B (en) | EPON on a kind of wavelength division multiplexing | |
| CN102412897A (en) | Single-fiber four-way symmetrical optical module | |
| US9287987B2 (en) | Self-seeded colorless burst-mode transmitter using reflective semiconductor optical amplifier and injection locked Fabry-Perot laser | |
| CN102209281A (en) | 10G EPON OLT (Ethernet passive optical network optical line terminal) single-fiber three-dimensional optical module | |
| CN111344968A (en) | Optical line terminal and capacity increased optical fiber access system | |
| US9722708B2 (en) | Optical transmitter, subscriber side device, and light source temperature change suppression method | |
| CN103313150A (en) | Time-and wavelength-division multiplexed passive optical network transmission system based on directly modulated laser | |
| CN102098106B (en) | Optical line terminal for wavelength division multiplexing-time division multiplexing passive optical network | |
| CN105635860A (en) | Triple play optical path structure in EPON/OLT | |
| KR101103686B1 (en) | System of wavelength division multiplexing passive optical network, and data transfer method thereof | |
| JP2010283644A (en) | Optical access network, optical communication method, and optical subscriber device | |
| JP2010166279A (en) | Optical communication system and optical line concentrator | |
| CN112671468A (en) | OLT optical transceiver integrated module, method and system for processing multiple PONs | |
| KR20150096159A (en) | Method and apparatus for selecting wavelength on wavelength tunable optical receiver | |
| CN202004922U (en) | Passive optical network system on wavelength division multiplexing | |
| CN102256186A (en) | Optical module of novel passive optical network |
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: 20140521 Termination date: 20150222 |
|
| EXPY | Termination of patent right or utility model |