CN103618975A - Burst optical signal producing circuit as well as method for producing burst optical signals - Google Patents
Burst optical signal producing circuit as well as method for producing burst optical signals Download PDFInfo
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- CN103618975A CN103618975A CN201310686363.0A CN201310686363A CN103618975A CN 103618975 A CN103618975 A CN 103618975A CN 201310686363 A CN201310686363 A CN 201310686363A CN 103618975 A CN103618975 A CN 103618975A
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Abstract
The invention discloses a burst optical signal producing circuit as well as a method for producing burst optical signals. The burst optical signal producing circuit comprises a programmable error code unit, a plurality of optical decay units as well as a photosynthesis way unit which are connected in sequence; each optical decay unit receives electric signals under the effect of multiple burst enable signals output by the programmable error code unit and converts the electric signals into optical signals to decay; each decayed optical signal is converted into an optical signal by the photosynthesis way unit to output; an electric signal shunt unit is connected between the programmable error code unit and each optical decay unit; the programmable error code unit outputs a burst electric signal separated at a time domain to the electric signal shunt unit; the electric signal shunt unit separates the burst electric signal into multiple paths of identical burst electric signals, and transmits the multiple paths of identical burst electric signals respectively to each optical decay unit. According to the burst optical signal producing circuit disclosed by the invention, the equipment connection can be simplified; moreover, various parameters of the burst optical signals can be adjusted; the application range can be expanded.
Description
Technical field
The present invention relates to light burst field tests, is specifically a kind of method that burst luminous signal being applied in optical module test produces circuit and generation burst luminous signal.
Background technology
EPON because large bandwidth cheaply advantage be deployed in a large number in the broadband access network of all parts of the world, and demand has kept the impetus of sustainable growth always.Passive optical network is generally comprised of optical line terminal (OLT, Optical Line Terminal), optical network unit (ONU, Optical Network Unit) and Optical Distribution Network (ODN, optical Distribution Network).From OLT process 1:N light passive splitter to ONU is downstream signal, works in continuous operation mode.From ONU to OLT, be called upward signal, work in burst mode.
Up technology is the core technology of PON system, how to realize the measurement of upward signal has also just been become to the Focal point and difficult point in PON system testing with assessment.As the OLT optical module of one of critical component in PON system, the burst receptivity of its receiver is directly connected to the service behaviour of whole PON system, therefore the Performance Evaluation of burst receiver is seemed to particularly important.What burst receiver received is the uplink burst light signal of time-division, and amplitude and the phase place of these burst luminous signals are not quite similar, and burst receiver must meet certain sensitivity, saturation and dynamic range index could process these burst luminous signals.
In typical burst receptivity simulation evaluating system, in General Requirements test macro, there is two-way burst luminous signal, the phase place of this two-way burst luminous signal and amplitude and inter-packet gap can regulate.In current burst test macro, there are two kinds of methods that produce two-way burst luminous signal.
As shown in Figure 1, burst luminous signal produces circuit and comprises programming bit error rate tester 1, bursting light emission module 21 and bursting light emission module 31, optical attenuator 22 and optical attenuator 32, optical combiner 4 a kind of method.Wherein, programming bit error rate tester 1 produces two signals of telecommunication that independently happen suddenly, and inputs respectively bursting light emission module 21 and bursting light emission module 31 generation two-way burst luminous signals, and two-way burst luminous signal forms up burst luminous signal through optical combiner 4.
In the circuit shown in Fig. 1, programming bit error rate tester 1 need to produce the two-way burst signal of telecommunication.The Error Detector that receives now test for happening suddenly is generally parallel Error Detector, produces the two-way burst signal of telecommunication and need adopt two pattern generators, not only increases equipment investment, and signal connects also more loaded down with trivial details.
Another kind method is as shown in Figure 2, and burst luminous signal produces circuit and comprises programming bit error rate tester 1, bursting light emission module 2, optical attenuator 22 and optical attenuator 32, optical combiner 4 and optical branching device 5.Wherein, the single channel burst signal of telecommunication input bursting light emission module 2 that programming bit error rate tester 1 produces, burst luminous signal is divided into two-way through optical branching device 5, wherein a road light signal inserts in the gap of another road burst luminous signal after 6 time delays of fiber delay time device, through optical combiner 4, forms required uplink burst light signal.
In the circuit shown in Fig. 2, although the use amount of pattern generator and bursting light emission module is all less, light path connects more complicated, and the delay time of optical fiber is fixed, the width of the bag of malleable burst luminous signal length and inter-packet gap, has not used limitation.
Summary of the invention
In view of this, a kind of method that provides burst luminous signal to produce circuit and produce burst luminous signal is provided the technical problem to be solved in the present invention, can regulate the various parameters of burst luminous signal, expands the scope of application.
Another object of the present invention is to a kind of method that burst luminous signal produces circuit and produces burst luminous signal, connection that can simplified apparatus, reduces production costs.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
A kind of burst luminous signal produces circuit, it comprises error code able to programme unit, a plurality of optical attenuations unit and the light combiner unit connecting successively, respectively this optical attenuation unit receives the signal of telecommunication and is converted to the light signal that light signal decays after the decay of ，Ge road and transfers a road light signal output to through light combiner unit under the effect of the multichannel burst enable signal of this error code able to programme unit output; In described error code able to programme unit and be respectively connected with signal of telecommunication branching unit between this optical attenuation unit, the burst signal of telecommunication of road separation in time domain is exported to described signal of telecommunication branching unit in this error code able to programme unit, and this signal of telecommunication branching unit is divided into this burst signal of telecommunication the burst signal of telecommunication that multichannel is identical and transfers to respectively respectively this optical attenuation unit.
As preferred version, described error code able to programme unit is programming bit error rate tester, and described programming bit error rate tester comprises a pattern generator, and described pattern generator can be created in the burst signal of telecommunication separated in time domain.
As preferred version, described optical attenuation unit comprises bursting light emission module and optical attenuator, respectively this burst enable signal is opened this corresponding bursting light emission module, this bursting light emission module receives the signal of telecommunication in corresponding time domain, and this signal of telecommunication is converted to optical signal transmission to this optical attenuator decay.
As preferred version, described signal of telecommunication branching unit is high speed signal fan-out device.
As preferred version, described smooth combiner unit is optical combiner.
As preferred version, the quantity of described optical attenuation unit is two.
Another kind of technical scheme provided by the invention:
A method that produces burst luminous signal, it comprises:
A, the circulation of a plurality of burst packet are exported, and form the burst signal of telecommunication of road separation in time domain;
B ,Jiang mono-tunnel separated burst signal of telecommunication in time domain is divided into the signal of telecommunication that multichannel is identical;
C, under the effect of different enable signals, receive the burst signal of telecommunication in corresponding time domain and be converted to light signal and decay;
D, by the synthetic road of decay Hou Ge road light signal separated burst luminous signal in time domain.
As preferred version, the quantity of described burst packet is two.
The technique effect that the present invention reaches is as follows:
1, the present invention only need to use a pattern generator, has reduced the resource of the equipment that takies, and has reduced production cost, has simplified the connection between equipment.
2, the width of the phase place of the adjustable burst luminous signal of the present invention, amplitude, bag length and inter-packet gap, it is simple accurate to adjust, and there is no limitation, can produce burst receiver and test required burst.
3, to produce the method for burst luminous signal simple in the present invention, easy operating.
Accompanying drawing explanation
Fig. 1 is that a kind of existing burst luminous signal produces circuit;
Fig. 2 is that another kind of existing burst luminous signal produces circuit;
Fig. 3 is that burst luminous signal of the present invention produces circuit;
Fig. 4 is the method flow diagram that the present invention produces light signal.
[critical piece symbol description]
1 programming bit error rate tester
2 bursting light emission modules
21 bursting light emission modules
22 optical attenuators
31 bursting light emission modules
32 optical attenuators
4 optical combiners
5 optical branching devices
6 fiber delay time devices
100 error code able to programme unit
110 signal of telecommunication branching units
120 optical attenuation unit
121 bursting light emission modules
122 optical attenuators
130 optical attenuation unit
131 bursting light emission modules
132 optical attenuators
140 smooth combiner units.
Embodiment
As shown in Figure 3, burst luminous signal generation circuit of the present invention comprises error code able to programme unit 100, signal of telecommunication branching unit 110, a plurality of optical attenuations unit and light combiner unit 140.
In the present embodiment, described optical attenuation unit is provided with two altogether, is respectively optical attenuation unit 120 and optical attenuation unit 130.But not as limit, in actual production process, can set as required.
The burst signal of telecommunication of error code able to programme unit 100 output one tunnels separation in time domain is to signal of telecommunication branching unit 110, this signal of telecommunication branching unit 110 is divided into the burst signal of telecommunication signal of telecommunication that multichannel is identical and transfers to respectively described optical attenuation unit 120 and optical attenuation unit 130, described optical attenuation unit 120 and optical attenuation unit 130 receive the signal of telecommunication in different time domain and are converted to the light signal that light signal decays after the decay of ，Ge road and transfer a road light signal output to through light combiner unit 140 under the effect of the enable signal that respectively happens suddenly of this error code able to programme unit 100 outputs.
Wherein said optical attenuation unit 120 comprises bursting light emission module 121 and optical attenuator 122, and described optical attenuation unit 130 comprises bursting light emission module 131 and optical attenuator 132.Burst enable signal 1 can be opened the bursting light emission module 121 in described optical attenuation unit 120, and burst enable signal 2 can be opened the bursting light emission module 131 in described optical attenuation unit 130.
Take optical attenuation unit 120 as example, wherein, burst enable signal 1 is opened this corresponding bursting light emission module 121, the signal of telecommunication that this bursting light emission module 121 is received in corresponding time domain, and this signal of telecommunication is converted to optical signal transmission to these optical attenuator 122 decay, and the optical signal transmission after decay is to light combiner unit 140.By the light signal after 132 decay of optical attenuator 122 and optical attenuator, after processing, can be synthesized described smooth combiner unit 140 respectively a road separated two-way burst luminous signal in time domain.
Described error code able to programme unit 100 can be programming bit error rate tester, and this programming bit error rate tester comprises a pattern generator, on this pattern generator, can edit two burst packet, when this pattern generator work, described two burst packet circulation is exported, and can form the burst signal of telecommunication of road separation in time domain.Thereby make the present invention reduce the usage quantity of pattern generator, reduced production cost, simplified the connection between equipment simultaneously.
Described signal of telecommunication branching unit 110 is high speed signal fan-out device, and described high speed signal fan-out device Ke Jiang mono-tunnel separated burst signal of telecommunication in time domain is divided into the signal of telecommunication that two-way is identical and inputs to respectively bursting light emission module 121 and bursting light emission module 131.And two-way burst enable signal coordinates the burst signal of telecommunication to control respectively unlatching and the shutoff to corresponding bursting light emission module 121 and bursting light emission module 131.Described smooth combiner unit 140 is optical combiner.
As shown in Figure 4, the method that the present invention produces burst luminous signal mainly comprises:
Step 200: a plurality of burst packet circulations are exported, and form the burst signal of telecommunication of road separation in time domain.
On the pattern generator of error code able to programme unit, edit a plurality of burst packet, open pattern generator, a plurality of burst packet circulations are exported, and form the burst signal of telecommunication of road separation in time domain; And the burst enable signal of this error code able to programme unit output and burst packet equal number is to each optical attenuation unit.
Wherein, described error code able to programme is only provided with a pattern generator in unit, reduces and takies device resource, has reduced manufacturing cost.In the present embodiment, only need to be created in two-way burst luminous signal separated in time domain, therefore can edit, have two burst packet on described pattern generator.When described pattern generator work, burst packet 1 and burst packet 2 circulation outputs, be formed on the two-way burst signal of telecommunication separated in a road time domain.
Step 201: Jiang Yi road separated burst signal of telecommunication in time domain is divided into the signal of telecommunication that multichannel is identical.
In the present embodiment, the described burst signal of telecommunication is divided into via high speed signal fan-out device the signal of telecommunication that two-way is identical and inputs to respectively this optical attenuation unit.
Step 202: under the effect of different enable signals, receive the burst signal of telecommunication in corresponding time domain and be converted to light signal and decay.
Wherein, receive and carry out that signal is changed and decay be optical attenuation unit, described optical attenuation unit comprises bursting light emission module and optical attenuator, respectively this burst enable signal is opened this corresponding bursting light emission module, make this bursting light emission module receive the signal of telecommunication in corresponding time domain, and this signal of telecommunication is converted to optical signal transmission to this optical attenuator decay, and the optical signal transmission after decay is to light combiner unit.
When the pattern generator output burst signal of telecommunication 1, the enable signal 1 that happens suddenly is accordingly opened bursting light emission module 121, converts the burst signal of telecommunication 1 to burst luminous signal 1; When the pattern generator output burst signal of telecommunication 2, the enable signal 2 that happens suddenly is accordingly opened bursting light emission module 131, converts the burst signal of telecommunication 2 to burst luminous signal 2.
Step 203: by the burst luminous signal of decay Hou Ge road light signal synthetic road separation in time domain.
Respectively via the burst luminous signal of attenuator 122 and attenuator 132 decay via the synthetic road of light combiner unit separated two-way burst luminous signal in time domain.Wherein, the width of the phase place of burst luminous signal, amplitude, bag length and inter-packet gap all can regulate as required arbitrarily, and adaptability is extensive.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (8)
1. a burst luminous signal produces circuit, it comprises error code able to programme unit, a plurality of optical attenuations unit and the light combiner unit connecting successively, respectively this optical attenuation unit receives the signal of telecommunication and is converted to the light signal that light signal decays after the decay of ，Ge road and transfers a road light signal output to through light combiner unit under the effect of the multichannel burst enable signal of this error code able to programme unit output;
It is characterized in that, in described error code able to programme unit and be respectively connected with signal of telecommunication branching unit between this optical attenuation unit, the burst signal of telecommunication of road separation in time domain is exported to described signal of telecommunication branching unit in this error code able to programme unit, and this signal of telecommunication branching unit is divided into this burst signal of telecommunication the burst signal of telecommunication that multichannel is identical and transfers to respectively respectively this optical attenuation unit.
2. burst luminous signal according to claim 1 produces circuit, it is characterized in that, described error code able to programme unit is programming bit error rate tester, and described programming bit error rate tester comprises a pattern generator, and described pattern generator can be created in the burst signal of telecommunication separated in time domain.
3. burst luminous signal according to claim 1 produces circuit, it is characterized in that, described optical attenuation unit comprises bursting light emission module and optical attenuator, respectively this burst enable signal is opened this corresponding bursting light emission module, this bursting light emission module receives the signal of telecommunication in corresponding time domain, and this signal of telecommunication is converted to optical signal transmission to this optical attenuator decay.
4. burst luminous signal according to claim 1 produces circuit, it is characterized in that, described signal of telecommunication branching unit is high speed signal fan-out device.
5. burst luminous signal according to claim 1 produces circuit, it is characterized in that, described smooth combiner unit is optical combiner.
6. according to the burst luminous signal described in any one in claim 1 ~ 5, produce circuit, it is characterized in that, the quantity of described optical attenuation unit is two.
7. a method that produces burst luminous signal, is characterized in that, it comprises:
A, the circulation of a plurality of burst packet are exported, and form the burst signal of telecommunication of road separation in time domain;
B ,Jiang mono-tunnel separated burst signal of telecommunication in time domain is divided into the signal of telecommunication that multichannel is identical;
C, under the effect of different enable signals, receive the burst signal of telecommunication in corresponding time domain and be converted to light signal and decay;
D, by the synthetic road of decay Hou Ge road light signal separated burst luminous signal in time domain.
8. the method for generation burst luminous signal according to claim 7, is characterized in that, the quantity of described burst packet is two.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201393222Y (en) * | 2009-04-24 | 2010-01-27 | 武汉理工大学 | Burst optical signal generating device |
| JP2011250000A (en) * | 2010-05-25 | 2011-12-08 | Nec Corp | Burst optical signal processing unit and burst optical signal processing method |
| CN102299741A (en) * | 2011-09-21 | 2011-12-28 | 中国电子科技集团公司第四十四研究所 | Method and device for transmitting uplink burst optical signal |
| CN203708410U (en) * | 2013-12-16 | 2014-07-09 | 武汉电信器件有限公司 | Circuit for generating burst optical signal |
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2013
- 2013-12-16 CN CN201310686363.0A patent/CN103618975B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201393222Y (en) * | 2009-04-24 | 2010-01-27 | 武汉理工大学 | Burst optical signal generating device |
| JP2011250000A (en) * | 2010-05-25 | 2011-12-08 | Nec Corp | Burst optical signal processing unit and burst optical signal processing method |
| CN102299741A (en) * | 2011-09-21 | 2011-12-28 | 中国电子科技集团公司第四十四研究所 | Method and device for transmitting uplink burst optical signal |
| CN203708410U (en) * | 2013-12-16 | 2014-07-09 | 武汉电信器件有限公司 | Circuit for generating burst optical signal |
Non-Patent Citations (1)
| Title |
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| 杨媛媛: "EPON突发式光发射模块的研究与开发", 《中国优秀硕士学位论文全文数据库（电子期刊》, 15 September 2005 (2005-09-15) * |
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