CN108933628A - Dense wave division multipurpose single fiber bi-directional optical amplification device and gain, Poewr control method - Google Patents
Dense wave division multipurpose single fiber bi-directional optical amplification device and gain, Poewr control method Download PDFInfo
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- CN108933628A CN108933628A CN201710381204.8A CN201710381204A CN108933628A CN 108933628 A CN108933628 A CN 108933628A CN 201710381204 A CN201710381204 A CN 201710381204A CN 108933628 A CN108933628 A CN 108933628A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
- H04B10/2942—Signal power control in a multiwavelength system, e.g. gain equalisation using automatic gain control [AGC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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Abstract
The present invention relates to a kind of dense wave division multipurpose single fiber bi-directional optical amplification device and gains, Poewr control method.Described device includes：Laser, for providing laser energy；Optical splitter, the laser for emitting laser are divided into the independent laser beam of two-way；Two Erbium-doped fiber amplifier components respectively receive laser beam all the way, are respectively used to the signal light amplification in a direction；Two two-way channel join-splitting devices, including optical fiber interface, for being connect with single fiber, two-way channel join-splitting device connects the input terminal of an Erbium-doped fiber amplifier component and the output end of another Erbium-doped fiber amplifier component, input terminal for input after partial wave Erbium-doped fiber amplifier component for the signal light of the single fiber of connection input amplifies, and by the output end of Erbium-doped fiber amplifier component export it is photosynthetic enter connection transmission single fiber in.Two conjunction partial wave equipment, two EDFA integration of equipments into a device, are improved level of integrated system, simplify optical fiber networking complexity, improve engineering maintenance ease for use by the present invention.
Description
Technical field
The present invention relates to optical fiber transmission techniques, more particularly to a kind of dense wave division multipurpose (DWDM) single fiber bi-directional light amplification
Device, gain control method and a kind of dense wavelength division for further relating to a kind of dense wave division multipurpose single fiber bi-directional optical amplification device are multiple
With the Poewr control method of single fiber bi-directional optical amplification device.
Background technique
Current DWDM single fiber bi-directional amplification system is mainly made of 4 independent equipment, and referring to Fig. 1, including two are mixed
Doped fiber amplifier (EDFA) and two conjunction partial wave equipment.Since EDFA itself does not support two-way light amplification, need to be divided using closing
Wave device first separates the light of both direction, is then utilized respectively two EDFA and amplifies respectively, then again by the letter of both direction
Number photosynthetic wave.Therefore, the system of Fig. 1 needs four independent equipment, and optical fiber networking connection is complicated, and ease for use is not high, is not easy to
Engineering maintenance
Summary of the invention
Based on this, it is necessary to provide a kind of dense wave division multipurpose single fiber bi-directional optical amplification device of high integration.
A kind of dense wave division multipurpose single fiber bi-directional optical amplification device, including：Laser, for providing laser energy；Light splitting
Device, the laser for emitting the laser are divided into the independent laser beam of two-way；Two Erbium-doped fiber amplifier components, respectively connect
The laser beam all the way is received, the signal light amplification in a direction is respectively used to；Two two-way channel join-splitting devices, including optical fiber interface,
The optical fiber interface is used to connect with transmission single fiber, and each two-way channel join-splitting device connects the input terminal of an Erbium-doped fiber amplifier component
The signal for the transmission single fiber input for being used to connect with the output end of another Erbium-doped fiber amplifier component, each two-way channel join-splitting device
The input terminal that light input after partial wave Erbium-doped fiber amplifier component amplifies, and by the output of Erbium-doped fiber amplifier component
End output it is photosynthetic enter connection transmission single fiber in.
The laser is pump laser in one of the embodiments,.
Each Erbium-doped fiber amplifier component includes in one of the embodiments,：Wave multiplexer, as Erbium-doped fiber amplifier
The input terminal of component is connect with the optical splitter and a two-way channel join-splitting device, laser beam for inputting optical splitter and two-way
The signal light of channel join-splitting device input inputs erbium-doped fiber after carrying out multiplex；The Er-doped fiber, for turning the energy of laser beam
It gives signal light and realizes power amplification；Isolator is connected between another two-way channel join-splitting device and the Er-doped fiber, for avoiding
Amplified signal light is reflected.
The laser is 980 nano wave length pump lasers in one of the embodiments, and the wave multiplexer is used for will
980 nano wave length pump lights and 1550 nano wave length signal lights input erbium-doped fiber after carrying out multiplex.
Each Erbium-doped fiber amplifier component further includes voltage-controlled attenuator in one of the embodiments, the voltage-controlled attenuator
Between the isolator and output end of Erbium-doped fiber amplifier component, by control pad value to realize to Erbium-doped fiber amplifier group
The gain control of part and/or the control of signal optical output power.
It in one of the embodiments, further include power-sensing circuit and attenuation control circuit；The power-sensing circuit
For to two Erbium-doped fiber amplifier components signal optical input power and signal optical output power detect；The decaying control
The input power and output power that circuit processed is detected according to power-sensing circuit carry out gain control and/or signal light is defeated
The control of power out.
It in one of the embodiments, further include driving circuit, the laser for exporting to the laser carries out constant
Power control.
The optical splitter is used to the laser that laser emits being divided into two-way laser in one of the embodiments,
Beam.
Above-mentioned dense wave division multipurpose single fiber bi-directional optical amplification device, by two conjunction partial wave equipment, two EDFA integration of equipments
Into a device, level of integrated system is improved, optical fiber networking complexity is enormously simplified, improves engineering maintenance ease for use.
And it realizes that two paths of signals amplifies using single laser, improves the utilization efficiency of laser.
It there is a need to provide a kind of gain control method of dense wave division multipurpose single fiber bi-directional optical amplification device.
A kind of gain control method of dense wave division multipurpose single fiber bi-directional optical amplification device, the dense wave division multipurpose single fiber
Two-way optical amplification device is dense wave division multipurpose single fiber bi-directional optical amplification device described in any of the above-described embodiment；The method packet
It includes：Monitor the signal optical input power and signal optical output power of two Erbium-doped fiber amplifier components；According to signal light input work
Rate and signal light output power calculate the gain of two Erbium-doped fiber amplifier components；Judge whether gain meets gain desired value,
The signal optical input power of described two Erbium-doped fiber amplifier components of monitoring and the step of signal optical output power are returned if meeting
Suddenly, otherwise according to the pad value of the corresponding voltage-controlled attenuator of the gain adjustment, two Er-doped fibers of the monitoring are then returned
The step of signal optical input power and signal optical output power of amplifier module.
In one of the embodiments, further include that firm power control is carried out to the laser of laser output, makes institute
The step of stating laser transmission power constant laser.
It in one of the embodiments, further include the first direction signal that 8 road waves are loaded with from a two-way wave multiplexer input
Light inputs the step of being loaded with the second direction signal light of 8 road waves from another two-way wave multiplexer.
It there is a need to provide a kind of Poewr control method of dense wave division multipurpose single fiber bi-directional optical amplification device.
A kind of Poewr control method of dense wave division multipurpose single fiber bi-directional optical amplification device, the dense wave division multipurpose single fiber
Two-way optical amplification device is dense wave division multipurpose single fiber bi-directional optical amplification device described in any of the above-described embodiment；The method packet
It includes：Monitor the signal optical output power of two Erbium-doped fiber amplifier components；Judge whether the output power meets power expectation
The step of being worth, the signal optical output power of two Erbium-doped fiber amplifier components of the monitoring returned if meeting, otherwise according to institute
The pad value that output power adjusts corresponding voltage-controlled attenuator is stated, described two Erbium-doped fiber amplifier components of monitoring are then returned
The step of signal optical output power.
The gain control method and Poewr control method of above-mentioned dense wave division multipurpose single fiber bi-directional optical amplification device, by right
The monitoring of signal light output and the attenuated feedback control algolithm of voltage-controlled attenuator, can be realized automated power control/automatic gain
Control, and improve the adjustable range of optical power.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains the attached drawing of other embodiments.
Fig. 1 is a kind of structural block diagram of traditional DWDM single fiber bi-directional amplification system；
Fig. 2 is the structural block diagram of dense wave division multipurpose single fiber bi-directional optical amplification device in an embodiment；
Fig. 3 is the structural block diagram of dense wave division multipurpose single fiber bi-directional optical amplification device in another embodiment；
Fig. 4 is the flow chart of the gain control method of dense wave division multipurpose single fiber bi-directional optical amplification device in an embodiment；
Fig. 5 is the flow chart of the Poewr control method of dense wave division multipurpose single fiber bi-directional optical amplification device in an embodiment；
Fig. 6 is the application schematic diagram of dense wave division multipurpose single fiber bi-directional optical amplification device in an embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", "upper",
"lower", "left", "right" and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Fig. 2 is the structural block diagram of dense wave division multipurpose single fiber bi-directional optical amplification device in an embodiment.Including laser 10,
20, two Erbium-doped fiber amplifier components 30 of optical splitter and two two-way channel join-splitting devices 40.Laser 10 is for providing laser energy
Amount, it is subsequent that laser energy is converted to the amplification that signal light is realized to signal light in Erbium-doped fiber amplifier component 30.Optical splitter
20 for being divided into the independent laser beam of two-way for the laser that laser 10 is emitted, and every Shu Jiguang inputs an Erbium-doped fiber amplifier component
30.The combination of laser 10 and optical splitter 20 can realize the signal light amplification of two Erbium-doped fiber amplifier components 30 with single light source
Function.
Erbium-doped fiber amplifier component 30 receives laser beam all the way, is respectively used to the signal light amplification in a direction.In Fig. 2 institute
Showing in embodiment, the Erbium-doped fiber amplifier component 30 above Fig. 2 is used to amplify the condensation wave (signal light) of A to the direction B, under
The Erbium-doped fiber amplifier component 30 of side is for amplifying the condensation wave (signal light) of B to the direction A.
Two-way channel join-splitting device 40 includes optical fiber interface, for connecting with transmission single fiber.In the embodiment depicted in figure 2, A to B
The input of transmission single fiber that the signal light in direction is connect from the two-way channel join-splitting device 40 with the left side Fig. 2, the signal light of B to the direction A from
The transmission single fiber input being connect with the two-way channel join-splitting device 40 on the right of Fig. 2.40 connection figure of two-way channel join-splitting device, 2 top on the left side
The output end of the Erbium-doped fiber amplifier component 30 of the input terminal and lower section of Erbium-doped fiber amplifier component 30, the two-way conjunction partial wave on the right
The input of the Erbium-doped fiber amplifier component 30 of the output end and lower section of the Erbium-doped fiber amplifier component 30 of 40 connection figure of device, 2 top
End.The signal light for the transmission single fiber input that two-way channel join-splitting device 40 is used to connect inputs Erbium-doped fiber amplifier group after carrying out partial wave
The input terminal of part 30 amplifies, and by the output end of Erbium-doped fiber amplifier component 30 export it is photosynthetic enter connection transmission list
In fibre.
Referring to Fig. 6, above-mentioned dense wave division multipurpose single fiber bi-directional optical amplification device, by two conjunction partial wave equipment, two EDFA
Integration of equipments simplifies even fine networking into a device, using this device, improves level of integrated system, enormously simplifies optical fiber
Networking complexity improves engineering maintenance ease for use.And it realizes that two paths of signals amplifies using single laser 10, improves sharp
The utilization efficiency of light device.
Referring to Fig. 3, in this embodiment, Erbium-doped fiber amplifier component 30 includes wave multiplexer 32, Er-doped fiber 34 and isolation
Device 36.Input terminal of the wave multiplexer 32 as Erbium-doped fiber amplifier component 30 is connect with optical splitter 20 and a two-way channel join-splitting device 40,
The signal light that laser beam and two-way channel join-splitting device 42 for inputting optical splitter 20 input inputs erbium-doped fiber after carrying out multiplex
34.Er-doped fiber 34 is for converting the energy of laser beam to signal light, to realize the power amplification of signal light.Isolator 36 connects
Between another two-way channel join-splitting device 40 and Er-doped fiber 34, for avoiding amplified signal light from being reflected.Er-doped fiber is put
Big component 30 can use the framework of traditional EDFA.
Laser 10 is pump laser, such as 980nm wavelength pump laser in one of the embodiments,.Multiplex
Device 32 can use 980nm/1550nm wave multiplexer, after 980nm wavelength pump light and 1550nm wavelength signals light are carried out multiplex
Input erbium-doped fiber 34.
Optical splitter 20 is 50/50 optical splitter in one of the embodiments, and the laser that laser 10 is emitted is divided into
Two-way laser beam.
Dense wave division multipurpose single fiber bi-directional optical amplification device is 16 wave single fiber bi-directional systems in one of the embodiments,
Wherein A uses frequency for 8 DWDM waves of 192.1THz~192.8THz to the direction B, and the frequency interval of each wave is 100GHz；
B uses frequency for 8 DWDM waves of 195.3THz~160.0THz to the direction A.When 16 waves of single fiber bi-directional pass through two respectively
After two-way channel join-splitting device 40, the optical path that two-way is loaded with 8 waves respectively can be divided into.
In one embodiment, the drive control circuit of dense wave division multipurpose single fiber bi-directional optical amplification device further includes complete machine
Apparatus management/control circuit, for manage and monitor each component in dense wave division multipurpose single fiber bi-directional optical amplification device (laser 10,
Optical splitter 20, Erbium-doped fiber amplifier component 30, two-way channel join-splitting device 40 etc.).
In the embodiment shown in fig. 3, Erbium-doped fiber amplifier component 30 further includes voltage-controlled attenuator 38.Voltage-controlled attenuator 38 is set
Between the isolator 36 and output end of Erbium-doped fiber amplifier component 30 (namely isolator 36 and the two-way conjunction being connect with output end
Between channel-splitting filter 40), it is defeated to the gain control of Erbium-doped fiber amplifier component 30 and/or signal light to realize by control pad value
The control of power out.In one embodiment, voltage-controlled attenuator 38 can be variable optical attenuator (VOA).
The drive control circuit of dense wave division multipurpose single fiber bi-directional optical amplification device includes using in one of the embodiments,
The driving circuit of firm power control is carried out in the laser exported to laser 10.
Traditional DWDM single fiber bi-directional amplification system carries out power control generally by the output for adjusting laser.But
Above-mentioned dense wave division multipurpose single fiber bi-directional optical amplification device provides energy using single laser 10 for the signal light of both direction
Amount, the purpose being independently controlled to both direction signal light is unable to reach to the power regulation of laser 10.Reality shown in Fig. 3
It applies in example, the drive control circuit of dense wave division multipurpose single fiber bi-directional optical amplification device includes power-sensing circuit 52 and decaying control
Circuit (not showing in Fig. 3) processed.Power-sensing circuit 52 is used for the signal optical input power to two Erbium-doped fiber amplifier components 30
It is detected with signal optical output power.There are two types of control models for attenuation control circuit, are automatic gain mode and saturation respectively
Power control mode.The signal optical input power and signal light output that attenuation control circuit is detected according to power-sensing circuit 52
Power carries out gain control and/or the control of signal optical output power.
Specifically, attenuation control circuit can cooperate gain control/power control algorithm to carry out gain control/power control
System.Gain control/power control algorithm is introduced individually below.
Fig. 4 is the flow chart of the gain control method of dense wave division multipurpose single fiber bi-directional optical amplification device in an embodiment.
Wherein dense wave division multipurpose single fiber bi-directional optical amplification device can be the dense wave division multipurpose single fiber bi-directional of any of the above-described embodiment
Optical amplification device.Fig. 4 includes the following steps：
S410 monitors the signal optical input power and signal optical output power of Erbium-doped fiber amplifier component.
Referring to Fig. 3, the input terminal and output end of Erbium-doped fiber amplifier component 30 separate part signal light, pass through power detection
Circuit 52 carries out power monitoring, and by the performance number reporting monitored to attenuation control circuit.
S420 calculates the gain of Erbium-doped fiber amplifier component.
Calculate separately the respective gain of two Erbium-doped fiber amplifier components 30.The actual gain value G=P of signalout-PinIt is (single
Position is dB)；Wherein PoutFor signal optical output power monitor value, PinFor signal optical input power monitor value.
S430, judges whether gain meets gain desired value, if so, return step S410, no to then follow the steps S440.
If the calculated yield value G of step S420 meets the gain desired value G of settingT, illustrate that gain is met the requirements, therefore
Return step S410 continues gain monitoring.It should be understood that being difficult to that yield value G is required to be exactly equal to gain in practical application
Desired value GT, a numberical range can be set, yield value G is fallen in the range it is determined that meeting gain desired value, otherwise
Execute step S440.
S440 adjusts the pad value of voltage-controlled attenuator.
According to yield value G and gain desired value GTAdjust the pad value of voltage-controlled attenuator 38.Attenuation control circuit passes through tune
The gain control of Erbium-doped fiber amplifier component 30 may be implemented in the pad value A for saving voltage-controlled attenuator 38.If reducing pad value, it is
The gain G of system just will increase；Increase pad value, the gain G of system will reduce.So if G is greater than GT, then adjustable attenuation is electric
Road controls voltage-controlled attenuator 38 and increases pad value；If G is less than GT, then attenuation control circuit control voltage-controlled attenuator 38, which reduces, declines
Depreciation.Voltage-controlled attenuator 38 works according to the pad value after adjusting, and return step S410, the pad value after monitoring adjusting
Whether gain can be made to meet the requirements, the gain of final Erbium-doped fiber amplifier component 30 can be converged in the gain desired value G of settingT。
It should be understood that the gain control of the signal light of dense wave division multipurpose single fiber bi-directional optical amplification device both direction is
Independent, the pad value of the signal optical input power of both direction, output power and voltage-controlled attenuator 38 can be different,
The judging result whether current pad value needs to adjust can also be different.
In one embodiment, further include that firm power control is carried out to the laser of laser output, make laser
The step of transmission power constant laser.
Fig. 5 is the flow chart of the Poewr control method of dense wave division multipurpose single fiber bi-directional optical amplification device in an embodiment.
Wherein dense wave division multipurpose single fiber bi-directional optical amplification device can be the dense wave division multipurpose single fiber bi-directional of any of the above-described embodiment
Optical amplification device.Fig. 5 includes the following steps：
S510 monitors the signal optical output power of Erbium-doped fiber amplifier component.
The monitoring of signal optical output power can be carried out by power-sensing circuit 52.
S520, judges whether signal optical output power meets power desired value, if so, return step S510, otherwise holds
Row step S530.
A numberical range equally can be set, if the signal optical output power P detectedoutIt falls and just sentences in the range
It is set to and meets power desired value, it is no to then follow the steps S530.
S530 adjusts the pad value of voltage-controlled attenuator.
According to signal optical output power PoutWith power desired value PTAdjust the pad value of voltage-controlled attenuator 38.If PoutGreatly
In PT, then attenuation control circuit control voltage-controlled attenuator 38 increases pad value；If PoutLess than PT, then attenuation control circuit controls
Voltage-controlled attenuator 38 reduces pad value.Voltage-controlled attenuator 38 works according to the pad value after adjusting, and return step S510,
Whether the pad value after monitoring is adjusted can be such that signal optical output power meets the requirements, the signal of final Erbium-doped fiber amplifier component 30
Optical output power can be converged in the power desired value P of settingT。
It should be understood that the power control of the signal light of dense wave division multipurpose single fiber bi-directional optical amplification device both direction is
Independent, the pad value of the signal optical input power of both direction, output power and voltage-controlled attenuator 38 can be different,
The judging result whether current pad value needs to adjust can also be different.
In one embodiment, further include that firm power control is carried out to the laser of laser output, make laser
The step of transmission power constant laser.
In one embodiment, attenuation control circuit, which can be configured as, executes above-mentioned dense wave division multipurpose single-fiber bidirectional optical
Gain control method/Poewr control method of amplifying device.Gain control method/the Poewr control method can by software+
The mode of circuit is realized, can also be realized by the known pure circuit mode in this field.
Above-mentioned dense wave division multipurpose single fiber bi-directional optical amplification device is come using the scheme for the pad value for adjusting voltage-controlled attenuator
It realizes signal optical output power control, automated power control and automatic gain control can be carried out by the condensation wave to both direction respectively
System, and improve the adjustable range of optical power.And independent automated power control and automatic increasing are carried out to the condensation wave of both direction
The realization of benefit control, solves the condensation wave for using the output power of traditional control laser to be unable to independent control both direction
Gain, to must use two lasers be respectively two-way condensation wave provide energy the problem of so that dense wave division multipurpose single fiber
Two-way optical amplification device can only configure single laser 10.Optionally, laser 10 uses constant power-mode, can guarantee
Output optical power is steady state value in the case that signal light input is constant, can simplify automated power control/automatic growth control
Complexity.
In one embodiment, dense wave division multipurpose single fiber bi-directional optical amplification device realizes the bi-directional light that gain is 17dB
Amplification.Wherein to the direction B, (frequency is 8 DWDM waves of 192.1THz~192.8THz to A, and the frequency interval of each wave is
Total input optical power 100GHz) is -5dBm.After being amplified by Erbium-doped fiber amplifier component 30, before voltage-controlled attenuator 38
Power be 15dBm, use attenuation control circuit control 38 pad value of voltage-controlled attenuator for 3dB, the output of final realization 12dBm
Optical power.Total input optical power of B to the direction A (8 DWDM waves that frequency is 195.3THz~160.0THz) is -17dBm, is led to
After crossing the amplification of Erbium-doped fiber amplifier component 30, the power before voltage-controlled attenuator 38 is 10dBm, using attenuation control circuit control
38 pad value of voltage-controlled attenuator processed is 10dB, the final total Output optical power for realizing 0dBm.
In another embodiment, total input optical power of A to the direction B (192.1THz~192.8THz) are -7dBm, are led to
After crossing the amplification of Erbium-doped fiber amplifier component 30, the power before voltage-controlled attenuator 38 is 14dBm, using attenuation control circuit control
38 pad value of voltage-controlled attenuator processed is 4dB, the final Output optical power for realizing 10dBm.B to the direction A (195.3THz~
Total input optical power 160.0THz) be -20dBm, by Erbium-doped fiber amplifier component 30 amplify after, voltage-controlled attenuator 38 it
Preceding power is 8dBm, uses attenuation control circuit control voltage-controlled attenuator pad value for 11dB, final realization -3dBm's is total defeated
Light power.
Above embodiments realize the fixed gain mode of 17dB.Similarly, the gain amplifier value of adjustable system, finally
Gain control needed for realizing.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of dense wave division multipurpose single fiber bi-directional optical amplification device, which is characterized in that including：
Laser, for providing laser energy；
Optical splitter, the laser for emitting the laser are divided into the independent laser beam of two-way；
Two Erbium-doped fiber amplifier components respectively receive the laser beam all the way, are respectively used to the signal light amplification in a direction；
Two two-way channel join-splitting devices, including optical fiber interface, the optical fiber interface are used to connect with transmission single fiber, each two-way conjunction point
Wave device connects the input terminal of an Erbium-doped fiber amplifier component and the output end of another Erbium-doped fiber amplifier component, each two-way conjunction point
Wave device be used for will connect transmission single fiber input signal light carry out partial wave after input Erbium-doped fiber amplifier component input terminal into
Row amplification, and by the output end of Erbium-doped fiber amplifier component export it is photosynthetic enter connection transmission single fiber in.
2. dense wave division multipurpose single fiber bi-directional optical amplification device according to claim 1, which is characterized in that each er-doped
Fiber amplifier component includes：
Wave multiplexer connect with the optical splitter and a two-way channel join-splitting device, is used for as the input terminal of Erbium-doped fiber amplifier component
Erbium-doped fiber is inputted after the signal light of the laser beam of optical splitter input and the input of two-way channel join-splitting device is carried out multiplex；
The Er-doped fiber realizes power amplification to signal light for converting the energy of laser beam；
Isolator is connected between another two-way channel join-splitting device and the Er-doped fiber, for avoiding amplified signal light anti-
It penetrates.
3. dense wave division multipurpose single fiber bi-directional optical amplification device according to claim 2, which is characterized in that the laser
For 980 nano wave length pump lasers, the wave multiplexer is used for 980 nano wave length pump lights and 1550 nano wave length signal lights
Erbium-doped fiber is inputted after carrying out multiplex.
4. dense wave division multipurpose single fiber bi-directional optical amplification device according to claim 2, which is characterized in that each Er-doped fiber
Amplifier module further includes voltage-controlled attenuator, the voltage-controlled attenuator be set to Erbium-doped fiber amplifier component isolator and output end it
Between, by control pad value to realize the gain control to Erbium-doped fiber amplifier component and/or the control of signal optical output power；
The dense wave division multipurpose single fiber bi-directional optical amplification device further includes power-sensing circuit and attenuation control circuit；The power inspection
Slowdown monitoring circuit is used to detect the signal optical input power and signal optical output power of two Erbium-doped fiber amplifier components；It is described
The input power and output power that attenuation control circuit is detected according to power-sensing circuit carry out gain control and/or letter
The control of number optical output power.
5. dense wave division multipurpose single fiber bi-directional optical amplification device according to claim 1, which is characterized in that further include driving
Circuit, the laser for exporting to the laser carry out firm power control.
6. a kind of gain control method of dense wave division multipurpose single fiber bi-directional optical amplification device, which is characterized in that the intensive wave
Point multiplexing single fiber bi-directional optical amplification device include：
Laser, for providing laser energy；
Optical splitter, the laser for emitting the laser are divided into the independent laser beam of two-way；
Two Erbium-doped fiber amplifier components respectively receive the laser beam all the way, are respectively used to the signal light amplification in a direction；
Two two-way channel join-splitting devices, including optical fiber interface, the optical fiber interface are used to connect with transmission single fiber, each two-way conjunction point
Wave device connects the input terminal of an Erbium-doped fiber amplifier component and the output end of another Erbium-doped fiber amplifier component, each two-way conjunction point
Wave device be used for will connect transmission single fiber input signal light carry out partial wave after input Erbium-doped fiber amplifier component input terminal into
Row amplification, and by the output end of Erbium-doped fiber amplifier component export it is photosynthetic enter connection transmission single fiber in；
Each Erbium-doped fiber amplifier component further includes voltage-controlled attenuator, and the voltage-controlled attenuator is set to Erbium-doped fiber amplifier component
Output end, by control pad value with realize the gain to Erbium-doped fiber amplifier component control；
The method includes：
Monitor the signal optical input power and signal optical output power of two Erbium-doped fiber amplifier components；
The gain of two Erbium-doped fiber amplifier components is calculated according to signal optical input power and signal light output power；
Judge whether gain meets gain desired value, the signal of two Erbium-doped fiber amplifier components of the monitoring is returned if meeting
The step of optical input power and signal optical output power, otherwise according to the decaying of the corresponding voltage-controlled attenuator of the gain adjustment
Then value returns to the signal optical input power of described two Erbium-doped fiber amplifier components of monitoring and the step of signal optical output power
Suddenly.
7. according to the method described in claim 6, it is characterized in that, further include to the laser output laser carry out it is constant
Power control, the step of making the laser transmission power constant laser.
8. according to the method described in claim 6, it is characterized in that, further including being loaded with 8 road waves from a two-way wave multiplexer input
First direction signal light, the step of being loaded with the second direction signal light of 8 road waves from another two-way wave multiplexer input.
9. a kind of Poewr control method of dense wave division multipurpose single fiber bi-directional optical amplification device, which is characterized in that the intensive wave
Point multiplexing single fiber bi-directional optical amplification device include：
Laser, for providing laser energy；
Optical splitter, the laser for emitting the laser are divided into the independent laser beam of two-way；
Two Erbium-doped fiber amplifier components respectively receive the laser beam all the way, are respectively used to the signal light amplification in a direction；
Two two-way channel join-splitting devices, including optical fiber interface, the optical fiber interface are used to connect with transmission single fiber, each two-way conjunction point
Wave device connects the input terminal of an Erbium-doped fiber amplifier component and the output end of another Erbium-doped fiber amplifier component, each two-way conjunction point
Wave device be used for will connect transmission single fiber input signal light carry out partial wave after input Erbium-doped fiber amplifier component input terminal into
Row amplification, and by the output end of Erbium-doped fiber amplifier component export it is photosynthetic enter connection transmission single fiber in；
Each Erbium-doped fiber amplifier component further includes voltage-controlled attenuator, and the voltage-controlled attenuator is set to Erbium-doped fiber amplifier component
Output end, by control pad value to realize the control to the signal optical output power of Erbium-doped fiber amplifier component；
The method includes：
Monitor the signal optical output power of two Erbium-doped fiber amplifier components；
Judge whether the output power meets power desired value, two Erbium-doped fiber amplifier groups of the monitoring are returned if meeting
The step of signal optical output power of part, the pad value of corresponding voltage-controlled attenuator is otherwise adjusted according to the output power, so
The step of returning to the signal optical output power of two Erbium-doped fiber amplifier components of the monitoring afterwards.
10. according to the method described in claim 9, it is characterized in that, further including carrying out perseverance to the laser of laser output
Constant dc power control, the step of making the laser transmission power constant laser.
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| CN201710381204.8A CN108933628A (en) | 2017-05-25 | 2017-05-25 | Dense wave division multipurpose single fiber bi-directional optical amplification device and gain, Poewr control method |
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| CN1464646A (en) * | 2002-06-26 | 2003-12-31 | 华为技术有限公司 | Connecting method and equipment for fiber optic amplifier supporting single fiber bidirectional light transmission |
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| CN105244759A (en) * | 2015-11-04 | 2016-01-13 | 中国电子科技集团公司第四十一研究所 | Output power adjustable stable light source device, light attenuator and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464646A (en) * | 2002-06-26 | 2003-12-31 | 华为技术有限公司 | Connecting method and equipment for fiber optic amplifier supporting single fiber bidirectional light transmission |
| JP4547530B2 (en) * | 2004-08-24 | 2010-09-22 | 独立行政法人産業技術総合研究所 | Time comparison system |
| US8055130B2 (en) * | 2008-01-03 | 2011-11-08 | Dowslake Microsystems Corp. | Optical transceiver amplifier |
| CN201541049U (en) * | 2009-10-26 | 2010-08-04 | 福州高意通讯有限公司 | Two-way transmission optical amplifier |
| JP2012015866A (en) * | 2010-07-01 | 2012-01-19 | Nippon Telegr & Teleph Corp <Ntt> | Bidirectional optical amplifier, pon system using same, and communication method |
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Application publication date: 20181204 |