CN104301026B - Image intensifer and fibre circuit guard method thereof - Google Patents
Image intensifer and fibre circuit guard method thereof Download PDFInfo
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- CN104301026B CN104301026B CN201310298718.9A CN201310298718A CN104301026B CN 104301026 B CN104301026 B CN 104301026B CN 201310298718 A CN201310298718 A CN 201310298718A CN 104301026 B CN104301026 B CN 104301026B
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Abstract
The invention discloses a kind of image intensifer and fibre circuit guard method thereof, relate to technical field of optical fiber communication.This image intensifer includes: two-way variable optical attenuator;The photoswitch of connection corresponding with two-way variable optical attenuator；The light amplification module being connected with photoswitch；Photo-coupler/the beam splitter being connected with light amplification module；Two optical attenuator luminous power test points, monitor the optical signal power of two-way variable optical attenuator respectively；Controller, the luminous power data regulation variable optical attenuator obtained according to the monitoring of optical attenuator luminous power test point；Judge that Work route breaks down according to luminous power data, control photoswitch and be switched to alternate routing.This image intensifer has been internally integrated OLP function, is down to minimum by OLP function to the deterioration of optical transmission system performance, and the optical power levels of external output port keeps consistent with the optical transmission system designed without OLP, reduces system and the safety risks of the person.
Description
Technical field
The present invention relates to technical field of optical fiber communication, particularly to a kind of image intensifer and fibre circuit guard method thereof.
Background technology
Due to optical fiber distinctive high-speed wideband transmittability, fibre-optic transmission system (FOTS) (includes OWDM (Wavelength
Division Multiplexing, WDM) transmission system) have become as the technical way that current information is transmitted.And optical fiber
Line interruption is the most common fault that fibre-optic transmission system (FOTS) faces, and the every aspect at communication network has all developed respective at present
Protected mode, pretection switch based on fibre circuit ((Optical Line Protection, protect to be called for short OLP by fibre circuit
Protect)) be fibre-optic transmission system (FOTS) reply optical-fiber line fault be that efficiency is high, the protected mode of low cost.
OLP has obtained certain application the most in the operator network at present, and Fig. 1 illustrates tradition OLP operation principle signal
Figure, as shown in Fig. 1 illustrates, OLP be operated between two adjacent image intensifers (Optical Amplifier, OA) (or
Between transmitter Tx and receiver Rx), connect " double " module after prime OA, through work and two routes of protection, by " choosing
Receive " module selection is from Work route or protects the optical signal routeing, and enters rear class OA.No matter OLP unit has the 3rd at present
Side provides and optical transmission system supplier provides two ways, but both modes all use the mode that OLP unit is external, and
And as Fig. 1 illustrates that shown 1～8 all reference points are external interface.The advantage of this OLP application mode is each light section of putting
Independent pretection switch ability can be set, still can ensure under conditions of multiple light sections of putting exist line fault simultaneously
The survivability of transmission system.
This tradition OLP faces following problem:
(1) external OLP unit is equivalent to add extra optical signal loss on the line, according to the work of OLP unit
Principle, current excess loss minimum is also between 3.5dB～4.0dB.No matter point-to-point transmission system or OA are cascaded
Long-haul transmission system, the performance degradation that OLP excess loss is brought is all significant.If transmission system is not set by band OLP system
Meter, the most then the OLP such as photoswitch, beam splitter assembly is introduced into excess loss, if assuming, each light section of putting all uses external OLP,
Then system receives OSNR and will decrease to few 3.5～4dB, causes many number systems will be unable to open-minded, even if minority system can be opened, is
System surplus also remains little.
(2) excess loss brought due to OLP unit, in order to ensure transmission range, it is necessary to increases the input work of reference point 2
Rate, compensates OLP excess loss,；Particularly in WDM long-haul transmission system do not consider OLP protection in the case of OA output work
It is the highest that rate would generally reach about 20dBm, if the excess loss of OLP need to be considered, also will increase the power of more than 3.5dB,
The then high power of reference point 2, not only can bring serious nonlinear effect, and it is hidden that equipment and the person will all produce safety
Suffer from.
(3) OLP judges whether to switch according to received optical power, in the long-term scene of multistage OLP application of the manystage cascade connection at present
In, the reception power that can cause subordinate OLP in prime OLP reversed process is abnormal, there is the probability by mistake switched.
In a word, there is deterioration transmission systematic function and the equipment of introducing and personal safety hidden danger in traditional external OLP modularity
Etc. shortcoming.
Summary of the invention
The inventors found that in above-mentioned prior art and have problems, and therefore at least in described problem
Individual problem proposes a kind of new technical scheme.
It is an object of the present invention to provide a kind of technical scheme for fibre circuit protection.
According to the first aspect of the invention, it is provided that a kind of image intensifer for fiber-optic transfer, including:
Two-way variable optical attenuator；
1 × 2 photoswitch of connection corresponding with two-way variable optical attenuator；
The light amplification module being connected with photoswitch；
1:2 photo-coupler/the beam splitter being connected with light amplification module；
Two optical attenuator luminous power test points, for monitoring the optical signal power of two-way variable optical attenuator respectively；
Controller, respectively with variable optical attenuator, photoswitch, optical attenuator luminous power test point and light amplification module phase
Even；For the luminous power data obtained according to the monitoring of optical attenuator luminous power test point, regulate variable optical attenuator；According to light
The luminous power data that the monitoring of attenuator luminous power test point obtains judge that Work route breaks down, and control photoswitch and are switched to standby
By route.
Alternatively, image intensifer is for west to east orientation structure；Variable optical attenuator is the decay of input port tunable optical
Device；Optical attenuator luminous power test point is input port luminous power test point, between variable optical attenuator and photoswitch；
Be connected with light amplification module is 1:2 light beam splitter.
Alternatively, this image intensifer also includes: the output port luminous power between light amplification module and light beam splitter
Monitoring point, for the output optical signal power of real-time monitoring output mouth, feeds back to controller to control image intensifer work shape
State.
Alternatively, image intensifer is used for the east of west to structure；Variable optical attenuator is the decay of input port tunable optical
Device；Optical attenuator luminous power test point as input port luminous power test point be positioned at variable optical attenuator and photoswitch it
Between；Be connected with light amplification module is 1:2 photo-coupler/beam splitter.
Alternatively, this image intensifer also includes: the output port between light amplification module and photo-coupler/beam splitter
Optical power monitoring point, for the output optical signal power of real-time monitoring output mouth, feeds back to controller to control image intensifer
Duty.
Alternatively, controller is for realizing the internal control function of light amplification module.
According to a further aspect in the invention, it is provided that a kind of use above-mentioned image intensifer to carry out fibre circuit guard method,
Including:
Optical attenuator luminous power test point monitors the optical signal power of variable optical attenuator output in real time；
The optical signal power that controller obtains according to the monitoring of optical attenuator luminous power test point, regulation tunable optical decay
Device；
According to the luminous power data that the monitoring of optical attenuator luminous power test point obtains, controller judges that Work route occurs event
Barrier, controls photoswitch and is switched to alternate routing.
Alternatively, image intensifer is for west to east orientation structure；Variable optical attenuator is the decay of input port tunable optical
Device；Optical attenuator luminous power test point is input port luminous power test point, between variable optical attenuator and photoswitch；
Be connected with light amplification module is 1:2 light beam splitter；The method also includes:
By the output port optical power monitoring real-time monitoring output of point between light amplification module and light beam splitter
The output optical signal power of mouth, feeds back to controller to control image intensifer duty.
Alternatively, image intensifer is used for the east of west to structure；Variable optical attenuator is the decay of input port tunable optical
Device；Optical attenuator luminous power test point as input port luminous power test point be positioned at variable optical attenuator and photoswitch it
Between；Be connected with light amplification module is 1:2 photo-coupler/beam splitter；The method also includes:
Output port optical power monitoring point between light amplification module and photo-coupler, for real-time monitoring output
The output optical signal power of mouth, feeds back to controller to control image intensifer duty.
Alternatively, the method also includes: controller is for realizing the internal control function of light amplification module.
An advantage of the invention that, be internally integrated OLP function at image intensifer, OLP excess loss is considered
In the indoor design of image intensifer, the deterioration of optical transmission system performance is down to minimum by OLP function；The internal collection of image intensifer
OLP function, the optical power levels of external output port is become to keep consistent with the optical transmission system designed without OLP, reduce system
With the safety risks of the person, and improve fibre-optic transmission system (FOTS) performance.
By detailed description to the exemplary embodiment of the present invention referring to the drawings, the further feature of the present invention and
Advantage will be made apparent from.
Accompanying drawing explanation
The accompanying drawing of the part constituting description describes embodiments of the invention, and is used for together with the description solving
Release the principle of the present invention.
Referring to the drawings, according to detailed description below, the present invention can be more clearly understood from, wherein:
Fig. 1 illustrates tradition OLP operation principle schematic diagram.
Fig. 2 illustrates the structure chart of an embodiment of the image intensifer according to the present invention.
Fig. 3 illustrates the structure chart of another embodiment of the image intensifer according to the present invention.
Fig. 4 illustrates the flow chart of an embodiment of the fibre circuit guard method according to the present invention.
Detailed description of the invention
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should also be noted that unless additionally have
Body illustrates, the parts illustrated the most in these embodiments and positioned opposite, the numerical expression of step and numerical value are not intended to this
The scope of invention.
Simultaneously, it should be appreciated that for the ease of describing, the size of the various piece shown in accompanying drawing is not according to reality
Proportionate relationship draw.
Description only actually at least one exemplary embodiment is illustrative below, never as to the present invention
And any restriction applied or use.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of when, described technology, method and apparatus should be considered to authorize a part for description.
It is shown here that any occurrence should be construed as merely exemplary with in all examples discussed, and not
It is as restriction.Therefore, other example of exemplary embodiment can have different values.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
Provided herein is the Novel double end mouth image intensifer of a kind of built in light route protection function, this Novel double end mouth light amplification
Device includes: two-way variable optical attenuator (Variable Optical Attenuator, VOA)；Decay with two-way tunable optical
1 × 2 photoswitch that device correspondence connects；The light amplification module being connected with photoswitch；The 1:2 optical coupling being connected with light amplification module
Device/beam splitter；Two optical attenuator luminous power test points, for monitoring the optical signal merit of two-way variable optical attenuator respectively
Rate；Controller, is connected with variable optical attenuator, photoswitch, optical attenuator luminous power test point and light amplification module respectively；With
In the luminous power data obtained according to the monitoring of optical attenuator luminous power test point, regulate variable optical attenuator；According to optical attenuation
The luminous power data that the monitoring of device luminous power test point obtains judge that Work route breaks down, and control photoswitch and are switched to standby road
By.Novel double end mouth image intensifer, by the way of built-in OLP functional unit, has been internally integrated OLP function at image intensifer, and one
OLP excess loss be take into account in the indoor design of image intensifer by the design of body, by OLP function to optical transmission system performance
Deterioration be down to minimum；Image intensifer is internally integrated OLP function, the optical power levels of external output port with without OLP design
Optical transmission system is completely the same, reduces system and the safety risks of the person, it is to avoid the risk factor that tradition OLP exists, and
Improve fibre-optic transmission system (FOTS) performance.
Fig. 2 illustrates the structure chart of an embodiment of the image intensifer according to the present invention.Fig. 2 gives the knot west to east orientation
Structure, wherein, variable optical attenuator is input port variable optical attenuator 21；Optical attenuator luminous power test point is input
Mouth luminous power test point 26, between input port variable optical attenuator 21 and photoswitch 22；With light amplification module 23 phase
Connect is 1:2 light beam splitter 24.
As in figure 2 it is shown, input port variable optical attenuator 21, for adjust each optical line by overall losses, it is ensured that
Transmission system is the concordance of performance before and after pretection switch.
Input port luminous power test point 26, for the input optical signal power of each input port of monitoring in real time, feeds back to
Controller 25 is as adjusting input port VOA 21 and the foundation of pretection switch action.
1 × 2 photoswitch 22, is used for selecting suitably to route, and performs pretection switch operation
Light amplification module 23, possesses the function of traditional image intensifer, and wherein controlling partial function can be in controller 25
Complete
Output port optical power monitoring point 27, for the output optical signal power of real-time monitoring output mouth, feeds back to control
Device 25 processed is as monitoring and the foundation of optimization image intensifer duty
1:2 photo-coupler/beam splitter 24, is divided into 2 tunnels by a road optical signal, be input to different optical line by.
Controller 25 is the brain of whole novel multiport image intensifer, and major function includes but not limited to as follows: according to
The luminous power data that input port optical power monitoring point 26 obtains, by regulation input port variable optical attenuator 21, it is ensured that
Image intensifer is in optimum Working for every route；When the number obtained according to input port optical power monitoring point 26
It is judged that Work route breaks down, control photoswitch 22 and be quickly switched into normal alternate routing.Light amplification module 23 interior
Portion is controlled function and can also be realized by controller 25.
Built-in OLP assembly makes to be down to the deterioration of systematic function minimum.Cascade according to noise of optical amplifier coefficient (NF)
Computing formula NF=NF1+ (NF2-1)/G1, the first order is light amplification module, and G1 is the biggest, typically at more than 22dB, the
Two grades is coupler/splitter, and passive device NF is equal to noise coefficient, and gain is negative insertion loss, according to above-mentioned formula, cascade
After NF closely NF1, say, that the most minimum on the impact of noise figure of amplifier performance after built-in OLP assembly.
Fig. 3 illustrates the structure chart of another embodiment of the image intensifer according to the present invention.Fig. 3 give to the east of west to
Structure；Variable optical attenuator is input port variable optical attenuator 31；Optical attenuator luminous power test point is input port
Luminous power test point 36, between input port variable optical attenuator 31 and photoswitch 32；It is connected with light amplification module 33
Be 1:2 light beam splitter 34.
As it is shown on figure 3, input port variable optical attenuator 31, for adjust each optical line by overall losses, it is ensured that
Transmission system is the concordance of performance before and after pretection switch.
Input port luminous power test point 36, for the input optical signal power of each input port of monitoring in real time, feeds back to
Controller 35 is as adjusting input port VOA 31 and the foundation of pretection switch action.
1 × 2 photoswitch 32, is used for selecting suitably to route, and performs pretection switch operation
Light amplification module 33, possesses the function of traditional image intensifer, and wherein controlling partial function can be in controller 35
Complete
Output port optical power monitoring point 37, for the output optical signal power of real-time monitoring output mouth, feeds back to control
Device 35 processed is as monitoring and the foundation of optimization image intensifer duty
1:2 photo-coupler/beam splitter 34, is divided into 2 tunnels by a road optical signal, be input to different optical line by.
Controller 35 is the brain of whole novel multiport image intensifer, and major function includes but not limited to as follows: according to
The luminous power data that input port optical power monitoring point 36 obtains, by regulation input port variable optical attenuator 31, it is ensured that
Image intensifer is in optimum Working for every route；When the number obtained according to input port optical power monitoring point 36
It is judged that Work route breaks down, control photoswitch 32 and be quickly switched into normal alternate routing.Light amplification module 33 interior
Portion is controlled function and can also be realized by controller 35.
Fig. 4 illustrates the flow chart of an embodiment of the fibre circuit guard method according to the present invention.
As shown in Figure 4, step 402, optical attenuator luminous power test point monitors the light of variable optical attenuator output in real time
Signal power, feeds back to controller as VOA 21 and the foundation of pretection switch action.
Step 404, the optical signal power that controller obtains according to the monitoring of optical attenuator luminous power test point, regulate tunable
Optical attenuator, adjust each optical line by overall losses, it is ensured that transmission system concordance of performance before and after pretection switch.
Step 406, the luminous power data that controller obtains according to the monitoring of optical attenuator luminous power test point judge working ways
By breaking down, control photoswitch and be switched to alternate routing.
In one embodiment, image intensifer is for west to east orientation structure；Variable optical attenuator is that input port is adjustable
Humorous optical attenuator；Optical attenuator luminous power test point is input port luminous power test point, is positioned at variable optical attenuator and institute
State between photoswitch；Be connected with light amplification module is 1:2 light beam splitter；Guard method also includes: by being positioned at light amplification mould
The output optical signal power of the output port optical power monitoring point real-time monitoring output mouth between block and light beam splitter, feeds back to
Controller is to control image intensifer duty.
In one embodiment, image intensifer is used for the east of west to structure；Variable optical attenuator is that input port is adjustable
Humorous optical attenuator；Optical attenuator luminous power test point is input port luminous power test point, is positioned at variable optical attenuator and institute
State between photoswitch；Be connected with light amplification module is 1:2 light beam splitter；Guard method also includes: by being positioned at light amplification mould
The output optical signal power of the output port optical power monitoring point real-time monitoring output mouth between block and light beam splitter, feeds back to
Controller is to control image intensifer duty.
Compared with OLP mode external with tradition, the technical scheme of the disclosure possesses following advantage:
(1) high-performance: built-in OLP assembly is the most minimum on the impact of noise figure of amplifier performance to systematicness
The deterioration of energy is down to minimum.
(2) low-risk: the high risk factor of external OLP assembly is mainly derived from extra in order to compensate that OLP assembly brings
Attenuation, the raising of the Output optical power of image intensifer external output port.Novel double end mouth image intensifer built-in OLP assembly, defeated
Light power is completely the same with non-band OLP system, it is to avoid potential safety hazard.
(3) low cost: fibre circuit protection be reply bottom optical fiber cable fault the most directly, the protection side of least cost
Formula, tackles modal optical-fiber line fault and has advantageous advantage.
So far, image intensifer according to the present invention and fibre circuit guard method thereof are described in detail.In order to avoid
Cover the design of the present invention, do not describe details more known in the field.Those skilled in the art as described above,
Completely it can be appreciated how implement technical scheme disclosed herein.
The method and system of the present invention may be achieved in many ways.Such as, can pass through software, hardware, firmware or
Software, hardware, any combination of firmware realize the method and system of the present invention.Said sequence for the step of described method
Merely to illustrate, the step of the method for the present invention is not limited to order described in detail above, special unless otherwise
Do not mentionlet alone bright.Additionally, in certain embodiments, the present invention also can be embodied as the program recorded in the recording medium, these programs
Including the machine readable instructions for realizing the method according to the invention.Thus, the present invention also covers storage for performing basis
The record medium of the program of the method for the present invention.
Although by example, some specific embodiments of the present invention have been described in detail, but the skill of this area
Art personnel are it should be understood that above example is merely to illustrate rather than in order to limit the scope of the present invention.The skill of this area
Art personnel are it should be understood that can modify to above example without departing from the scope and spirit of the present invention.This
Bright scope is defined by the following claims.
Claims (10)
1. the image intensifer for fiber-optic transfer, it is characterised in that be internally integrated fibre circuit at described image intensifer and protect
Protect OLP function, including:
Two-way variable optical attenuator；
1 × 2 photoswitch of connection corresponding with described two-way variable optical attenuator；
The light amplification module being connected with photoswitch；
1:2 photo-coupler/the beam splitter being connected with described light amplification module；
Two optical attenuator luminous power test points, for the optical signal power of variable optical attenuator described in monitoring two-way respectively；
Controller, respectively with described variable optical attenuator, described photoswitch, described optical attenuator luminous power test point and described
Light amplification module is connected；For the luminous power data obtained according to the monitoring of described optical attenuator luminous power test point, regulation is described
Variable optical attenuator；Determine that Work route is sent out according to the luminous power data that the monitoring of described optical attenuator luminous power test point obtains
Raw fault, controls described photoswitch and is switched to alternate routing.
Image intensifer the most according to claim 1, it is characterised in that described image intensifer is for west to east orientation structure；Institute
Stating variable optical attenuator is input port variable optical attenuator；Described optical attenuator luminous power test point is as input port
Luminous power test point is between described variable optical attenuator and described photoswitch；Be connected with described light amplification module is 1:
2 photo-couplers/beam splitter.
Image intensifer the most according to claim 2, it is characterised in that also include:
Output port optical power monitoring point between described light amplification module and described photo-coupler/beam splitter, for real
Time monitoring output mouth output optical signal power, feed back to described controller to control described image intensifer duty.
Image intensifer the most according to claim 1, it is characterised in that described image intensifer is used for the east of west to structure；Institute
Stating variable optical attenuator is input port variable optical attenuator；Described optical attenuator luminous power test point is as input port
Luminous power test point is between described variable optical attenuator and described photoswitch；Be connected with described light amplification module is 1:
2 photo-couplers/beam splitter.
Image intensifer the most according to claim 4, it is characterised in that also include:
Output port optical power monitoring point between described light amplification module and described photo-coupler/beam splitter, for real
Time monitoring output mouth output optical signal power, feed back to described controller to control described image intensifer duty.
Image intensifer the most as claimed in any of claims 1 to 5, it is characterised in that described controller is used for realizing
The internal control function of described light amplification module.
7. one kind uses image intensifer as claimed in claim 1 to carry out fibre circuit guard method, it is characterised in that including:
Described optical attenuator luminous power test point monitors the optical signal power of described variable optical attenuator output in real time；
The optical signal power that described controller obtains according to the monitoring of described optical attenuator luminous power test point, regulates described tunable
Optical attenuator；
The luminous power data that described controller obtains according to the monitoring of described optical attenuator luminous power test point judge that Work route is sent out
Raw fault, controls described photoswitch and is switched to alternate routing.
Method the most according to claim 7, it is characterised in that described image intensifer is for west to east orientation structure；Described can
Tuned light attenuator is input port variable optical attenuator；Described optical attenuator luminous power test point is input port luminous power
Test point, between described variable optical attenuator and described photoswitch；Be connected with described light amplification module is that 1:2 light divides
Light device；
Described method also includes:
Monitor defeated in real time by the output port optical power monitoring point between described light amplification module and described smooth beam splitter
Go out the output optical signal power of port, feed back to described controller to control described image intensifer duty.
Method the most according to claim 7, it is characterised in that described image intensifer is used for the east of west to structure；Described can
Tuned light attenuator is input port variable optical attenuator；Described optical attenuator luminous power test point is as input port light merit
Rate test point is between described variable optical attenuator and described photoswitch；Be connected with described light amplification module is 1:2 light
Coupler/splitter；
Described method also includes:
By the output port optical power monitoring real-time monitoring output of point between described light amplification module and light beam splitter
The output optical signal power of mouth, feeds back to described controller to control described image intensifer duty.
Method the most according to claim 7, it is characterised in that also include:
Described controller is for realizing the internal control function of described light amplification module.
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| CN107529101B (en) * | 2016-06-21 | 2022-05-13 | 中兴通讯股份有限公司 | Mobile terminal, passive optical network information collection method and device |
| CN106773028B (en) * | 2017-01-16 | 2018-09-28 | 吉林省长光瑞思激光技术有限公司 | A kind of laser beam scanning system |
| CN111049570A (en) * | 2019-12-20 | 2020-04-21 | 国家电网有限公司 | Automatic switching protection system for optical fiber circuit |
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| CN104301026A (en) | 2015-01-21 |
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