CN102291183A - burst light signal receiving method and device - Google Patents
burst light signal receiving method and device Download PDFInfo
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- CN102291183A CN102291183A CN2011102814871A CN201110281487A CN102291183A CN 102291183 A CN102291183 A CN 102291183A CN 2011102814871 A CN2011102814871 A CN 2011102814871A CN 201110281487 A CN201110281487 A CN 201110281487A CN 102291183 A CN102291183 A CN 102291183A
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Abstract
The invention discloses a burst light signal receiving method and device, which are used for solving the problems that an AGC (Automatic Gain Control) threshold value cannot be adjusted along with the magnitude of the power of a received burst light signal, burst light signals of different powers cannot be received completely, and the like due to the adoption of a preset AGC threshold value receiving burst light signal in a burst light signal receiving circuit in the prior art. The burst light signal receiving method comprises the following steps that: a light-way divider divides a received burst light signal into two paths, wherein one path is input into a light detection circuit, and the other path is input into a light caching circuit; the light detection circuit detects whether the light power changes and controls an AGC threshold value of the light signal receiving circuit to be set quickly; and the light caching circuit caches the received light signal and inputs the cached light signal into a light receiving and converting circuit. The burst light signal receiving method and the device have the beneficial technical effects that: the AGC threshold value can be automatically set quickly according to the magnitude of the power of the received burst light signal, and burst light signals of different powers can be completely received and converted into electric signals.
Description
Invention field
The present invention relates to the method for reseptance and the device of light signal in the communication system optical fiber communication, specially refer to burst luminous signal method of reseptance and device.
Background technology
GPON(is designated hereinafter simply as GPON at Gigabit-capable Passive Optical Network)/ethernet passive optical network EPON(is designated hereinafter simply as EPON) in the communication system, the transfer of data of up link adopts time-multiplexed mode to share up channel, because each Optical Network Terminal ONU(is designated hereinafter simply as ONU) be designated hereinafter simply as OLT to light network unit OLT() transmission path inequality, so each ONU is also inequality to path and the loss of OLT, therefore, derive from the light signal of different ONU sending nodes, its amplitude and phase change are very big, the variation that is power is very big, and this amplitude and the phase change light signal of big (being that variable power is bigger) are commonly called burst luminous signal.Usually relate to the reception of light signal in optical fiber telecommunications system, so-called light signal receives the process that typically refers to receiving optical signals and be converted into the signal of telecommunication.Usually, in the light signal receiving course, all adopt automatic gain control AGC(to be designated hereinafter simply as AGC) technology, to guarantee complete receiving light signal and be converted into the signal of telecommunication.And for the reception of burst luminous signal, because its variable power is bigger, need judge the size of each light signal luminous power of receiving, and according to this with the AGC threshold value setting in the middle of the amplitude of luminous power, reception burst luminous signal that like this can be complete also is converted into the signal of telecommunication.Usually, required time of the threshold value setting of AGC is less than 40ns.
Prior art burst luminous signal receiving circuit adopts and preestablishes AGC threshold values reception burst luminous signal, and the AGC threshold values can not be adjusted with the size of the burst luminous signal power that receives, therefore, and the burst luminous signal that receives different capacity that can not be complete.
In addition, trans-impedance amplifier TIA(with the quick threshold value setting function of automatic gain control AGC is designated hereinafter simply as TIA) have a function of adjusting the AGC threshold values according to the size of optical signal power automatically, only need to apply reseting pulse signal to TIA before receiving burst luminous signal each time it is resetted, TIA just can and carry out automatic gain and control according to the big or small automatic setting AGC threshold values of the optical signal power that receives.
Summary of the invention
Preestablish AGC threshold values reception burst luminous signal for solving the employing of prior art burst luminous signal receiving circuit, the AGC threshold values can not be adjusted with the size of the burst luminous signal power that receives, the problems such as burst luminous signal that receive different capacity that can not be complete, the present invention proposes a kind of burst luminous signal method of reseptance and device.Burst luminous signal receiving circuit method of the present invention adopts optical branching device that the burst luminous signal that receives is divided into two tunnel, one tunnel input optical detection circuit, another road input light buffer circuit; Whether optical detection circuit detection luminous power changes and controls the quick threshold value setting of burst luminous signal receiving circuit automatic gain control AGC; The light buffer circuit with the light signal buffer memory that receives after input light-receiving change-over circuit.
Further, burst luminous signal method of reseptance of the present invention adopts optical branching device that the burst luminous signal that receives is divided into two the tunnel, one tunnel input optical detection circuit, another road input light buffer circuit, comprise: the burst luminous signal that receives is divided into two the tunnel by power, power is 10% burst luminous signal input optical detection circuit, and power is 90% burst luminous signal input light buffer circuit; Optical branching device receives and the burst luminous signal speed of distribution is 1.25Gbps, operation wavelength 1310nm.
Further, whether burst luminous signal method of reseptance optical detection circuit of the present invention detects luminous power and changes and control burst luminous signal and receive the quick threshold value setting of change-over circuit automatic gain control AGC, comprising: in the light-receiving change-over circuit, adopt have the quick threshold value setting function of automatic gain control AGC trans-impedance amplifier TIA as optical receiving circuit in the AGC device work; Whether the optical signal power that detects input variation has taken place, if variation has taken place, optical detection circuit applies reseting pulse signal to TIA resets it, otherwise, do not carry out any operation; The minimum input optical power of optical detection circuit is≤-37dBm, maximum input optical power is≤-15dBm; Wherein, the width of described reseting pulse signal is 16ns.
Further, burst luminous signal method of reseptance light buffer circuit of the present invention is imported optical receiving circuit after with the light signal buffer memory that receives, comprise: adopting length is that 10 to 17 meters G.652 model optical fiber is that the burst luminous signal of 1.25Gbps carries out buffer memory to speed, and its cache-time is 47ns to 80ns; And after cache-time expires, the burst luminous signal that receives is imported the light-receiving change-over circuit.
Burst luminous signal receiving system of the present invention comprises: optical branching device, optical detection circuit, light buffer circuit and light-receiving change-over circuit, wherein:
Optical branching device can receiving velocity be 1.25Gbps, the burst luminous signal of operation wavelength 1310nm, and it is divided into two tunnel, one road power by input power with it is 10% burst luminous signal input optical detection circuit, and another road power is 90% burst luminous signal input light buffer circuit;
Whether the optical signal power that optical detection circuit can detect input variation has taken place, if variation has taken place, optical detection circuit applies reseting pulse signal to the trans-impedance amplifier TIA with the quick threshold value setting function of automatic gain control AGC resets it, otherwise, do not carry out any operation; The minimum input optical power of optical detection circuit is≤-37dBm, maximum input optical power is≤-15dBm; Wherein, the width of described reset pulse is 16ns;
It is that 10 to 17 meters G.652 model optical fiber is that the burst luminous signal of 1.25Gbps carries out buffer memory to speed that the light buffer circuit adopts length, and its cache-time is 47ns to 80ns; And after cache-time expires, the burst luminous signal that receives is imported the light-receiving change-over circuit;
The light-receiving change-over circuit comprises the trans-impedance amplifier TIA with the quick threshold value setting function of automatic gain control AGC, when optical detection circuit after TIA applies reseting pulse signal and it is resetted, TIA can be according to the big or small automatic setting AGC threshold values of the optical signal power that receives; The burst luminous signal that reception light buffer circuit transmits also is converted into the signal of telecommunication.
The useful technique effect of burst luminous signal receiving circuit method of the present invention and device is to set the AGC threshold values automatically fast according to the size of the burst luminous signal power that receives, and the burst luminous signal that receives different capacity that can be complete also is converted into the signal of telecommunication.
Description of drawings
Accompanying drawing 2 is structural representations of burst luminous signal receiving system of the present invention;
Accompanying drawing 3 is effect schematic diagrames that burst luminous signal method of reseptance of the present invention and device receive burst luminous signal.
Below in conjunction with drawings and the specific embodiments burst luminous signal method of reseptance of the present invention and device are further described.
Embodiment
Preestablish AGC threshold values reception burst luminous signal for solving the employing of prior art burst luminous signal receiving circuit, the AGC threshold values can not be adjusted with the size of the burst luminous signal power that receives, the problems such as burst luminous signal that receive different capacity that can not be complete, the present invention proposes a kind of burst luminous signal method of reseptance.Burst luminous signal receiving circuit method of the present invention adopts optical branching device that the burst luminous signal that receives is divided into two tunnel, one tunnel input optical detection circuit, another road input light buffer circuit; Whether optical detection circuit detection luminous power changes and controls the quick threshold value setting of burst luminous signal receiving circuit automatic gain control AGC; The light buffer circuit with the light signal buffer memory that receives after input light-receiving change-over circuit.
For satisfying the needs of GPON/ EPON communication system, it is 1.25Gbps that the quick threshold value setting method employing of burst luminous signal receiving circuit of the present invention can receive and distribute burst luminous signal speed, the optical branching device of operation wavelength 1310nm.It is 10% burst luminous signal input optical detection circuit that optical branching device is divided into two tunnel, one road power by power with the burst luminous signal that receives, and another road power is 90% burst luminous signal input light buffer circuit.
Burst luminous signal method of reseptance of the present invention adopts the trans-impedance amplifier TIA with the quick threshold value setting function of automatic gain control AGC as AGC device work in the optical receiving circuit, and making full use of TIA can be according to the characteristic of the big or small automatic setting AGC threshold values of the optical signal power that receives.Only need to apply reseting pulse signal it is resetted receiving burst luminous signal forward direction TIA each time, TIA just can and carry out automatic gain and control according to the big or small automatic setting AGC threshold values of the optical signal power that receives.Because the application of TIA, the quick A GC threshold value setting of light-receiving change-over circuit can reset it to realize by apply reset pulse to TIA.Therefore, whether the optical signal power that burst luminous signal method of reseptance optical detection circuit of the present invention detects input has taken place to change and the quick threshold value setting of control burst luminous signal reception change-over circuit automatic gain control AGC, comprise: whether the optical signal power that detects input variation has taken place, if variation has taken place, optical detection circuit applies reset pulse to TIA resets it, otherwise, do not carry out any operation; Wherein, the width of described reseting pulse signal is 16ns.Be guaranteeing the sensitivity of optical detection circuit, the minimum input optical power of burst luminous signal method of reseptance optical detection circuit of the present invention is≤-37dBm, maximum input optical power is≤-15dBm.
Because whether optical detection circuit changes to detect and apply reseting pulse signal to TIA to the power of input optical signal it is resetted need for 32 to 60ns time, in addition, for guaranteeing complete reception burst luminous signal, the burst luminous signal that needs the TIA reset pulse to import with respect to the light buffer circuit should shift to an earlier date 15 to 20ns and arrive, can calculate thus, the light buffer circuit need will be imported the light-receiving change-over circuit behind the burst luminous signal buffer memory 47 to 80ns that receive again, could guarantee the burst luminous signal that receives that the light-receiving change-over circuit can be complete.Therefore, it is that 10 to 17 meters G.652 model optical fiber is that the burst luminous signal of 1.25Gbps carries out buffer memory to speed that burst luminous signal method of reseptance light buffer circuit of the present invention adopts length, and its cache-time is 47ns to 80ns; And after cache-time expires, the burst luminous signal that receives is imported the light-receiving change-over circuit.
Accompanying drawing 2 is structural representations of burst luminous signal receiving system of the present invention, and as seen from the figure, burst luminous signal receiving system of the present invention comprises: optical branching device, optical detection circuit, light buffer circuit and light-receiving change-over circuit, wherein:
Optical branching device can receiving velocity be 1.25Gbps, the burst luminous signal of operation wavelength 1310nm, and it is divided into two tunnel, one road power by input power with it is 10% burst luminous signal input optical detection circuit, and another road power is 90% burst luminous signal input light buffer circuit;
Whether the optical signal power that optical detection circuit can detect input variation has taken place, if variation has taken place, optical detection circuit applies reseting pulse signal to the trans-impedance amplifier TIA with the quick threshold value setting function of automatic gain control AGC resets it, otherwise, do not carry out any operation; The minimum input optical power of optical detection circuit is≤-37dBm, maximum input optical power is≤-15dBm; Wherein, the width of described reset pulse is 16ns;
It is that 10 to 17 meters G.652 model optical fiber is that the burst luminous signal of 1.25Gbps carries out buffer memory to speed that the light buffer circuit adopts length, and its cache-time is 47ns to 80ns; And after cache-time expires, the burst luminous signal that receives is imported the light-receiving change-over circuit;
The light-receiving change-over circuit comprises the trans-impedance amplifier TIA with the quick threshold value setting function of automatic gain control AGC, when optical detection circuit after TIA applies reseting pulse signal and it is resetted, TIA can be according to the big or small automatic setting AGC threshold values of the optical signal power that receives; The burst luminous signal that reception light buffer circuit transmits also is converted into the signal of telecommunication.
Accompanying drawing 3 is effect schematic diagrames that burst luminous signal method of reseptance of the present invention and device receive burst luminous signal, and among the figure, 1,2,3 are respectively the different burst luminous signals of power, wherein, the power maximum of No. 1 burst luminous signal, the power of No. 3 burst luminous signals is less, and the power of No. 2 burst luminous signals is littler; 1 ', 2 ', 3 ' is the burst luminous signal that receives; The threshold values of horizontal line among the figure for setting.As seen from the figure, because burst luminous signal method of reseptance of the present invention and device are all set the AGC threshold values according to the size of the burst luminous signal power that receives each before receiving burst luminous signal automatically fast, therefore, the burst luminous signal that receives different capacity that can be complete also is converted into the signal of telecommunication.The burst luminous signal that being shown in 1 ', 2 ', 3 ' receives in the accompanying drawing 3, compare with the different burst luminous signals of the power shown in 1,2,3 in the accompanying drawing 3, burst luminous signal method of reseptance of the present invention and install complete reception different capacity burst luminous signal and be converted into the signal of telecommunication.
Claims (5)
1. a burst luminous signal method of reseptance is characterized in that: adopt optical branching device that the burst luminous signal that receives is divided into two tunnel, one tunnel input optical detection circuit, another road input light buffer circuit; Whether optical detection circuit detection luminous power changes and controls the quick threshold value setting of burst luminous signal receiving circuit automatic gain control AGC; The light buffer circuit with the light signal buffer memory that receives after input light-receiving change-over circuit.
2. according to the described burst luminous signal method of reseptance of claim 1, it is characterized in that: adopt optical branching device that the burst luminous signal that receives is divided into two the tunnel, one tunnel input optical detection circuit, another road input light buffer circuit, comprise: the burst luminous signal that receives is divided into two the tunnel by power, power is 10% burst luminous signal input optical detection circuit, and power is 90% burst luminous signal input light buffer circuit; Optical branching device receives and the burst luminous signal speed of distribution is 1.25Gbps, operation wavelength 1310nm.
3. according to the described burst luminous signal method of reseptance of claim 1, it is characterized in that: whether optical detection circuit detects luminous power and changes and control burst luminous signal and receive the quick threshold value setting of change-over circuit automatic gain control AGC, comprising: in the light-receiving change-over circuit, adopt have the quick threshold value setting function of automatic gain control AGC trans-impedance amplifier TIA as optical receiving circuit in the AGC device work; Whether the optical signal power that detects input variation has taken place, if variation has taken place, optical detection circuit applies reseting pulse signal to TIA resets it, otherwise, do not carry out any operation; The minimum input optical power of optical detection circuit is≤-37dBm, maximum input optical power is≤-15dBm; Wherein, the width of described reseting pulse signal is 16ns.
4. according to the described burst luminous signal method of reseptance of claim 1, it is characterized in that: the light buffer circuit is imported optical receiving circuit after with the light signal buffer memory that receives, comprise: adopting length is that 10 to 17 meters G.652 model optical fiber is that the burst luminous signal of 1.25Gbps carries out buffer memory to speed, and its cache-time is 47ns to 80ns; And after cache-time expires, the burst luminous signal that receives is imported the light-receiving change-over circuit.
5. burst luminous signal receiving system, it is characterized in that: this burst luminous signal receiving system comprises: optical branching device, optical detection circuit, light buffer circuit and light-receiving change-over circuit, wherein:
Optical branching device can receiving velocity be 1.25Gbps, the burst luminous signal of operation wavelength 1310nm, and it is divided into two tunnel, one road power by input power with it is 10% burst luminous signal input optical detection circuit, and another road power is 90% burst luminous signal input light buffer circuit;
Whether the optical signal power that optical detection circuit can detect input variation has taken place, if variation has taken place, optical detection circuit applies reseting pulse signal to the trans-impedance amplifier TIA with the quick threshold value setting function of automatic gain control AGC resets it, otherwise, do not carry out any operation; The minimum input optical power of optical detection circuit is≤-37dBm, maximum input optical power is≤-15dBm; Wherein, the width of described reset pulse is 16ns;
It is that 10 to 17 meters G.652 model optical fiber is that the burst luminous signal of 1.25Gbps carries out buffer memory to speed that the light buffer circuit adopts length, and its cache-time is 47ns to 80ns; And after cache-time expires, the burst luminous signal that receives is imported the light-receiving change-over circuit;
The light-receiving change-over circuit comprises the trans-impedance amplifier TIA with the quick threshold value setting function of automatic gain control AGC, when optical detection circuit after TIA applies reseting pulse signal and it is resetted, TIA can be according to the big or small automatic setting AGC threshold values of the optical signal power that receives; The burst luminous signal that reception light buffer circuit transmits also is converted into the signal of telecommunication.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106664236A (en) * | 2015-06-10 | 2017-05-10 | 华为技术有限公司 | Signal transmission method, controller and signal transmission system |
| CN110460387A (en) * | 2019-07-24 | 2019-11-15 | 深圳市深光谷科技有限公司 | A kind of coherent receiver, optical communication system and light signal detection method |
| WO2023221837A1 (en) * | 2022-05-19 | 2023-11-23 | 华为技术有限公司 | Optical communication method and receiving-end apparatus |
Citations (2)
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| US20040247057A1 (en) * | 2003-06-04 | 2004-12-09 | Gil-Yong Park | Automatic gain control apparatus with short settling time |
| CN1574712A (en) * | 2003-06-09 | 2005-02-02 | 三星电子株式会社 | Optical power equalizer in a passive optical network |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040247057A1 (en) * | 2003-06-04 | 2004-12-09 | Gil-Yong Park | Automatic gain control apparatus with short settling time |
| CN1574712A (en) * | 2003-06-09 | 2005-02-02 | 三星电子株式会社 | Optical power equalizer in a passive optical network |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106664236A (en) * | 2015-06-10 | 2017-05-10 | 华为技术有限公司 | Signal transmission method, controller and signal transmission system |
| CN106664236B (en) * | 2015-06-10 | 2019-11-12 | 华为技术有限公司 | A kind of method for transmitting signals, controller and signal transmission system |
| CN110460387A (en) * | 2019-07-24 | 2019-11-15 | 深圳市深光谷科技有限公司 | A kind of coherent receiver, optical communication system and light signal detection method |
| WO2023221837A1 (en) * | 2022-05-19 | 2023-11-23 | 华为技术有限公司 | Optical communication method and receiving-end apparatus |
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| CN102291183B (en) | 2014-02-26 |
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