CN106100785A - A kind of auto-manual adjustable optical attenuator - Google Patents
A kind of auto-manual adjustable optical attenuator Download PDFInfo
- Publication number
- CN106100785A CN106100785A CN201610607324.0A CN201610607324A CN106100785A CN 106100785 A CN106100785 A CN 106100785A CN 201610607324 A CN201610607324 A CN 201610607324A CN 106100785 A CN106100785 A CN 106100785A
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- attenuation
- auto
- optical attenuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0221—Power control, e.g. to keep the total optical power constant
Abstract
The invention discloses a kind of auto-manual adjustable optical attenuator, can automatically and manually deamplification energy, wherein, including the photodetection circuit being sequentially connected with, decay estimation circuit and attenuation processing circuit, also include potentiometer: described photodetection circuit is for being converted to the signal of telecommunication by the optical signal received；Described potentiometer connects described decay estimation circuit, for receiving and export the different signals of telecommunication to described decay estimation circuit；Described decay estimation circuit obtains driving voltage and pad value, output to described attenuation processing circuit according to the signal of telecommunication that described photodetection circuit or described potentiometer export after calculating；Described attenuation processing circuit receives driving voltage and pad value, according to driving voltage and pad value, signal is made corresponding decay, and exports optical signal.The present invention can quickly calculate pad value according to the signal received, it is also possible to feeds back signal, is also used as in neutral net regulating the device of weights simultaneously, and efficiency is high, and function is many, easily operates.
Description
Technical field
The present invention relates to optoelectronic areas, particularly to a kind of auto-manual adjustable optical attenuator.
Background technology
Adjustable optical attenuator is a kind of dynamic device of important optical fiber in optical fiber telecommunications system, is mainly used in dense wavelength division system
The power-balance of channel in system, it is achieved flat gain, dynamic gain equalization and through-put power equilibrium.Concrete application includes: with mix
Bait fiber amplifier (EDFA) composition gain balance image intensifer；Gain controller is formed with amplified spontaneous emission (ASE) light source；
Form gain balance ROADM with configurable OADM device (ROADM), increase with multiplexing demultiplexing device (MUX/DEMUX) composition
Benefit balance MUX/DEMUX.
The most basic characteristic of optical-fiber network is adjustable, and mixes by (DWDM) transmission system in particular with intensive multiplexed optical wave
Doped fiber amplifier (EDFA) application in optical communications, multiple optical signal transmission passages must be carried out gain flattening or
Channel power equalization, carries out the most saturated control at optical receiver end, also also needs to control other signal in optical-fiber network
System, these all make variable optical attenuator (VOA) become the most indispensable Primary Component.
At present, the existing polytype manufacturing technology of VOA optical attenuator technology, have adjustable mechanical formula technology, magneto-optic technology,
Many patterns such as liquid crystal technology, acoustooptic technique, hot light technology, Planar waveguide technology, MEMS technology.MEMS (MEMS) is
A kind of micro Process mechanical system produced by semiconductor integrated circuit technique, uses the VOA of this systems technology manufacture owing to having
The technical characterstics such as low insertion loss, highly attenuating scope, fast response time and volume is little, low cost, low-power consumption, the most extensive
It is applied in optical communication system.
Adjustable mechanical formula attenuator is that the method using machinery to be in the light realizes decaying luminous power, this kind of optical attenuation
Device belongs to scattering spectroscopic modes, inserts the wheel that is in the light, make a part of light be hindered in the collimated beam between input and output port
Gear.By control be in the light wheel edge incision light beam the degree of depth control pad value.Mechanical type optical attenuator is the most traditional solution
Certainly scheme, its shortcoming be volume compared with big, the many structures of assembly are complicated, response speed is the highest, be difficult to automated production, be unfavorable for collection
Become.
Magneto-optical adjustable optical attenuator principle: under the action of a magnetic field, the optical property of some materials changes, such as profit
By Faraday effect, crystal birefringence effect etc. such that it is able to the size of regulation optical signal, it is achieved the purpose of light energy decay.
The change of light polarization is easily affected by ambient temperature by magneto-optical VOA due to magneto-optical crystal, and temperature characterisitic is poor, needs temperature
Degree compensates, and additionally when the magnetization of magneto-optical crystal is not reaching to saturated, can produce many magnetic domains inside magneto-optical crystal.Depositing of magnetic domain
In the repeatable variation of the attenuating causing variable optical attenuator, i.e. allow to keep good repeatability, it is also difficult to
Produce the smooth change of decay, and due to the existence of magnetic domain border surface scattering so that decay more difficult control.
Comprising a kind of liquid crystal lens in the design structure of liquid crystal type adjustable optical attenuator, it has the energy of the automatically controlled smooth angle of wedge
Power, liquid crystal type adjustable optical attenuator has the advantages such as fast response time.But simultaneously as the environmental performance of liquid crystal is not good enough, insert
Loss is big, and complex process is easily influenced by temperature, so its application is also by a definite limitation.
Sound-light type adjustable optical attenuator driving voltage based on change acousto-optic modulator (AOM), or offset its Prague
The driving frequency of position, the change of frequency can cause the coupling efficiency between output beam and optical fiber collimator, and then produce light
The decay of signal.The weak point of sound-light type adjustable optical attenuator is: the method is affected relatively big by light path precision, is not easy to collection
Become.
The optical property change spy that thermal-optical type adjustable optical attenuator is had in temperature field mainly by some materials
Property, such as the change etc. of the thermoluminescent material refractive index that variations in temperature is caused.Thermo-optic effect type optical attenuator is due to heating, cooling dress
Putting relative complex, the mathematical function relation between the light guide media refractive index of temperature field is complicated and is difficult to precise quantification and control,
Especially its longer response time hinders its application in Modern optical communication.
Waveguide type optical attenuator (can also be referred to as intensity modulator) is study hotspot in recent years, both can utilize dry
Relate to effect to realize, it is also possible to utilize electric absorption effect to realize.Waveguide type adjustable optical attenuator has that size is little, response speed
The advantage such as fast, but simultaneously also include a lot of shortcoming, as wayward in optical property, temperature influence is bigger.
Except keeping in addition to the comprehensive optical property of conventional art VOA in MEMS VOA performance, also have that attenuation range is big, drive
Galvanic electricity forces down, volume is little, be prone to multichannel integrated, fast response time and cost performance advantages of higher.
MEMS VOA drives based on voltage, and the relation of its voltage and decay is nonlinear, in order to obtain essence
True attenuation, only just can obtain corresponding driving voltage by lookup voltage attenuation table, and this just brings the biggest to use
Inconvenience.The most also someone studied the communication function using general I2C communication interface to realize with host computer, and realized declining
Decrement to the calculating of voltage data, but non-for having the research of the adjustable optical attenuator of the pattern of being automatically adjusted and feedback function
It is the fewest, so developing a kind of adjustable optical attenuator with the pattern of being automatically adjusted and manual adjustment mode is to have very much using value
's.
Summary of the invention
It is contemplated that overcome above technical problem, propose a kind of there is the pattern of being automatically adjusted and manual adjustment mode can
Optical attenuator, it is possible to the signal according to receiving quickly calculates pad value, it is also possible to feed back signal.
For solving above-mentioned technical problem, according to the first aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator,
Can automatically and manually deamplification energy, wherein, at the photodetection circuit being sequentially connected with, decay estimation circuit and decay
Reason circuit, also includes potentiometer:
Photodetection circuit is for being converted to the signal of telecommunication by the optical signal received；
Potentiometer connects decay estimation circuit, for receiving and export the different signals of telecommunication to decay estimation circuit；
Decay estimation circuit obtain after calculating according to the signal of telecommunication that photodetection circuit or potentiometer export driving voltage and
Pad value, output to attenuation processing circuit；
Attenuation processing circuit receives driving voltage and pad value, makes signal accordingly according to driving voltage and pad value
Decay, and export optical signal.
According to the second aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, also include: feedback electricity
Road, connects attenuation processing circuit, is used for inputting another signal so that another signal and the optical signal phase of attenuation processing circuit output
Interaction obtains the light signal fed back of different delayed time correspondence difference luminous power.
According to the third aspect of the invention we, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, also include: display electricity
Road, connects attenuation processing circuit, for showing the pad value of attenuation processing circuit.
According to the fourth aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, also include: clock is believed
Number circuit, connects photodetection circuit or potentiometer, after being compared by the signal received, produces one control
Clock signal transmission is to decay estimation circuit.
According to the fifth aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, auto-manual is also included
Switch bar, is automatically adjusted pattern and manual adjustment mode for switching.
According to the sixth aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, also include: first is defeated
Enter device, connect photodetection circuit or potentiometer, be used for receiving and export the first signal to photodetection circuit or potentiometer；The
Two loaders, connect attenuation processing circuit, are used for receiving and export secondary signal to attenuation processing circuit.
According to the seventh aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, estimation circuit bag of decaying
Include analog to digital conversion circuit, single-chip microcomputer and the D/A converting circuit being sequentially connected with:
Analog to digital conversion circuit connects photodetection circuit, clock signal circuit or potentiometer, for the telecommunications that will receive
Number be converted to digital signal and be sent to single-chip microcomputer；
After single-chip microcomputer receives digital signal, the voltage attenuation table being stored in single-chip microcomputer by inquiry obtains adjustable light decay
Subtract driving voltage and the pad value of device；
D/A converting circuit is connected with attenuation processing circuit, for the digital signal that single-chip microcomputer exports is converted to telecommunications
Number.
According to the eighth aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, attenuation processing circuit bag
Include the amplifying circuit being connected and variable optical attenuation circuit: amplifying circuit connects decay estimation circuit, calculates for receiving attenuation
The driving voltage of circuit and pad value, and drive variable optical attenuation circuit, make variable optical attenuation circuit make respective attenuation.
According to the ninth aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, decay estimation circuit is also
Including: attenuation meter maker, connect single-chip microcomputer, be used for generating voltage attenuation table output voltage attenuation meter to single-chip microcomputer.
According to the tenth aspect of the invention, it is provided that a kind of auto-manual adjustable optical attenuator, wherein, decay estimation circuit is also
Including: preset device, connect single-chip microcomputer, for predeterminated voltage attenuation meter output voltage attenuation meter to single-chip microcomputer.
The auto-manual adjustable optical attenuator of the present invention has the advantage that compared to prior art can be according to reception
Optical signal quickly calculates pad value, can feed back signal, has possessed again what traditional adjustable optical attenuator was similar to simultaneously
Optical property, it is adaptable to the power equalization of channel in dense wavelength division multiplexing system, it is possible to as regulating weights in neutral net
Device, has high efficiency, easily realization, low cost, multi-functional beneficial effect.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the frame structure schematic diagram of the embodiment of the present invention；
It is bent that Fig. 2 is that the realization of the embodiment of the present invention is automatically adjusted the voltage attenuation of the VOA being saved in single-chip microcomputer of pattern
Line；
Fig. 3 is that the voltage attenuation of the VOA being saved in single-chip microcomputer realizing manual adjustment mode of the embodiment of the present invention is bent
Line；
Fig. 4 is the workflow schematic diagram of the embodiment of the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage of greater clarity, below in conjunction with detailed description of the invention and join
According to accompanying drawing, the present invention is described in more detail.It should be understood that these describe the most exemplary, and it is not intended to limit this
Bright scope.Additionally, in the following description, eliminate the description to known features and technology, to avoid unnecessarily obscuring this
The concept of invention.
The invention provides a kind of auto-manual adjustable optical attenuator, can automatically and manually deamplification energy, wherein, bag
Include photodetection circuit, the decay estimation circuit and attenuation processing circuit being sequentially connected with, also include potentiometer:
Photodetection circuit is for being converted to the signal of telecommunication by the optical signal received；
Potentiometer connects decay estimation circuit, for receiving and export the different signals of telecommunication to decay estimation circuit；
Decay estimation circuit obtain after calculating according to the signal of telecommunication that photodetection circuit or potentiometer export driving voltage and
Pad value, output to attenuation processing circuit；
Attenuation processing circuit receives driving voltage and pad value, makes signal accordingly according to driving voltage and pad value
Decay, and export optical signal.
In further embodiment of the present invention, auto-manual adjustable optical attenuator also includes: feedback circuit, connects decay
Process circuit, be used for inputting another signal so that the optical signal of another signal and the output of attenuation processing circuit interacts and obtains
The light signal fed back of different delayed time correspondence difference luminous power.
It should be noted that be automatically adjusted pattern and the driving voltage of manual adjustment mode and pad value is different, from
The driving voltage of dynamic shaping modes and pad value are to obtain after formula is changed, the driving voltage of manual adjustment mode and decay
Value is the numerical value tested in advance.
In further embodiment of the present invention, auto-manual adjustable optical attenuator also includes: feedback circuit, connects decay
Process circuit, be used for inputting another signal so that the optical signal of another signal and the output of attenuation processing circuit interacts and obtains
The light signal fed back of different delayed time correspondence difference luminous power, and light signal fed back is sent to the first loader so that it is realize certainly
The function of dynamic regulation.
It should be noted that signal is fed back by feedback circuit so that signal can carry out decay in various degree, full
The use demand that foot is different.
In further embodiment of the present invention, auto-manual adjustable optical attenuator also includes: display circuit, connects decay
Process circuit, for showing the pad value of attenuation processing circuit.
In further embodiment of the present invention, auto-manual adjustable optical attenuator also includes: clock signal circuit, connects
Photodetection circuit or potentiometer, after being compared by the signal received, produce a clock signal controlled and pass
It is passed to estimation circuit of decaying.
In further embodiment of the present invention, auto-manual adjustable optical attenuator also includes auto-manual switch bar, uses
It is automatically adjusted pattern and manual adjustment mode in switching.
It should be noted that the realization of manual adjustment mode manually regulator potentiometer obtains voltage signal.
In further embodiment of the present invention, auto-manual adjustable optical attenuator also includes: the first loader, connects light
Electrical resistivity survey slowdown monitoring circuit or potentiometer, be used for receiving and export the first signal to photodetection circuit or potentiometer；Second loader, even
Connect attenuation processing circuit, be used for receiving and export secondary signal to attenuation processing circuit.
It should be noted that the light source of the second loader is preferably laser instrument, the secondary signal receiving and exporting and decay
After processing the signal interaction in circuit, outputing signal to feedback circuit, feedback circuit, by incoming for signal the first loader, makes
Obtain signal further to be regulated, it is achieved feedback function.
In further embodiment of the present invention, attenuation processing circuit includes amplifying circuit and the variable optical attenuation being connected
Circuit: amplifying circuit connects decay estimation circuit, for driving voltage and the pad value of receiving attenuation estimation circuit, and driving can
Light modulation attenuator circuit, makes variable optical attenuation circuit make respective attenuation.
As it is shown in figure 1, the auto-manual adjustable optical attenuator of the present invention, can automatically and manually deamplification energy, wherein,
Including the first loader being sequentially connected with, photodetection circuit, clock signal circuit, decay estimation circuit, attenuation processing circuit
And feedback circuit, also include auto-manual switch bar, potentiometer, the second loader and display circuit.Wherein, decay estimation circuit
Including the analog to digital conversion circuit being sequentially connected with, single-chip microcomputer and D/A converting circuit, attenuation processing circuit includes the amplification being connected
Circuit and variable optical attenuation circuit.
Auto-manual switch bar is arranged on the first loader outfan, connects the defeated of photodetection circuit and potentiometer respectively
Enter end, control to be automatically adjusted the switching of pattern, manual adjustment mode.
It is automatically adjusted under pattern, receives external optical signal by the first loader and the second loader.Under manual adjustment mode,
External electric signal is received by the first loader.
Under manual adjustment mode, user can be by the size of the potentiometer regulation signal of telecommunication.Potentiometer connects the first input
Device receives the signal of telecommunication.Manual regulator potentiometer can export different size of voltage signal to clock signal circuit by user's request.
The signal of telecommunication inputs through the first loader, exports after potentiometer, decay estimation circuit and attenuation processing circuit.It is automatically adjusted mould
Under formula, optical signal inputs through the first loader, through photodetection circuit, decay estimation circuit and attenuation processing circuit and second
Another optical signal of loader input exports after interacting.
Decay estimation circuit can be storage chip, is preset with voltage attenuation table, recording voltage decay in voltage attenuation table
Value, decay estimation circuit output voltage pad value is to attenuation processing circuit thus realizes decay.
Under manual adjustment mode, the first loader receives external signal, and wherein external signal is the signal of telecommunication, and potentiometer connects
Receiving the signal of telecommunication, manual regulator potentiometer output voltage signal is to clock signal circuit.The signal that clock signal circuit will receive
After comparing, produce a clock signal transmission controlled to storage chip.Survey in advance by being saved in storage chip
The voltage attenuation table tried, obtains driving voltage and pad value, then output signal.Output signal sequentially pass through again amplifying circuit,
Variable optical attenuation circuit is decayed, and shows pad value by display unit.
Under being automatically adjusted pattern, the first loader receives external signal, and transfers signals to photodetection circuit.Light
Electrical resistivity survey slowdown monitoring circuit converts optical signals into the signal of telecommunication, and the signal of telecommunication receiving photodetection circuit is compared by clock signal circuit
After relatively, produce a clock signal transmission controlled to storage chip.Storage chip pre-saves the voltage tested
Attenuation meter, obtains driving voltage and pad value by tabling look-up.Amplifying circuit receiving attenuation estimation circuit output driving voltage and
Pad value, drives variable optical attenuation circuit that signal is made respective attenuation, and shows pad value by display unit.
Second loader, connects variable optical attenuation circuit, receives and export another optical signal to variable optical attenuation circuit.Instead
It is corresponding that current feed circuit receives the different delayed time obtained after another optical signal interacts with the optical signal that variable optical attenuation circuit exports
The light signal fed back of different luminous powers, and light signal fed back is transferred to the first loader.First loader receives feedback light letter
After number, transferring signals to photodetection circuit, photodetection circuit converts optical signals into the signal of telecommunication.Clock signal circuit,
Connect photodetection circuit, after being compared by the signal received, produce a clock signal transmission controlled to decay
Estimation circuit.Signal sequentially passes through decay estimation circuit again, signal is made and being declined accordingly by amplifying circuit, variable optical attenuation circuit
Subtract, and show pad value at display unit.
Under manual adjustment mode, the first loader receives external signal, and wherein external signal is the signal of telecommunication, and potentiometer connects
Receiving the signal of telecommunication, manual regulator potentiometer output voltage signal is to clock signal circuit.Analog to digital conversion circuit connects clock signal electricity
Road.After the signal received is compared by clock signal circuit, produce a clock signal transmission controlled and turn to modulus
Change circuit.The signal of telecommunication received is converted to digital signal and is sent to single-chip microcomputer by analog to digital conversion circuit.Single-chip microcomputer receives
After digital signal, by being saved in the voltage attenuation table tested in advance in single-chip microcomputer, obtain driving voltage and pad value, more defeated
Go out signal to D/A converting circuit.Signal sequentially passes through amplifying circuit again, signal is made respective attenuation by variable optical attenuation circuit,
And show pad value at display unit.
In further embodiment of the present invention, decay estimation circuit includes analog to digital conversion circuit, the monolithic being sequentially connected with
Machine and D/A converting circuit: analog to digital conversion circuit connects photodetection circuit, clock signal circuit or potentiometer, for receiving
To the signal of telecommunication be converted to digital signal and be sent to single-chip microcomputer；After single-chip microcomputer receives digital signal, it is stored in by inquiry
Voltage attenuation table in single-chip microcomputer obtains driving voltage and the pad value of adjustable optical attenuator；D/A converting circuit and attenuation processing
Circuit is connected, for the digital signal that single-chip microcomputer exports is converted to the signal of telecommunication.
Under being automatically adjusted pattern, the first loader receives external signal, and transfers signals to photodetection circuit.Light
Electrical resistivity survey slowdown monitoring circuit converts optical signals into the signal of telecommunication, and the signal of telecommunication receiving photodetection circuit is compared by clock signal circuit
After relatively, produce a clock signal transmission controlled to analog to digital conversion circuit.The signal of telecommunication that analog to digital conversion circuit will receive
Be converted to digital signal and be sent to single-chip microcomputer.Pre-saving the voltage attenuation table tested in single-chip microcomputer, single-chip microcomputer receives
After digital signal, obtain driving voltage and pad value by tabling look-up after calculating, output signals to D/A converting circuit.Digital-to-analogue turns
Change circuit and the digital signal that single-chip microcomputer exports be converted to the signal of telecommunication, amplifying circuit receive D/A converting circuit driving voltage and
Pad value, drives variable optical attenuation circuit that signal is made respective attenuation, and shows pad value at display circuit.
Second loader, connects variable optical attenuation circuit, receives and export another optical signal to variable optical attenuation circuit.Instead
It is corresponding that current feed circuit receives the different delayed time obtained after another optical signal interacts with the optical signal that variable optical attenuation circuit exports
The light signal fed back of different luminous powers, and light signal fed back is transferred to the first loader.First loader receives feedback light letter
After number, transferring signals to photodetection circuit, photodetection circuit converts optical signals into the signal of telecommunication.Clock signal circuit,
Connect photodetection circuit, after being compared by the signal received, produce a clock signal transmission controlled to decay
Analog to digital conversion circuit in estimation circuit.The signal received is converted to digital signal and is sent to monolithic by analog to digital conversion circuit
Machine.Signal sequentially passes through single-chip microcomputer again, signal is made and being declined accordingly by D/A converting circuit, amplifying circuit, variable optical attenuation circuit
Subtract, and show pad value at display unit.
It should be noted that in the embodiment of Fig. 2-Fig. 4 the core devices of analog to digital conversion circuit be that the modulus of 8 turns
Changing chip ADC0809, the core devices of D/A converting circuit is the analog-digital chip DAC0832 of 8, and single-chip microcomputer is adopted
Model be STC89C52.In the embodiment of Fig. 2-4, photodetection circuit is by the driving electricity of photodetector with its periphery
Road forms, and clock signal circuit is the clock letter that the ALE pin of single-chip microcomputer obtains analog to digital conversion circuit through 74L,S74 tetra-frequency dividing
Number, display circuit select be liquid crystal display LCD1602, power circuit comprises 3 power supplys, be respectively+5v ,+15v ,-
12v。
In further embodiment of the present invention, decay estimation circuit also includes: attenuation meter maker, connects single-chip microcomputer,
For generating voltage attenuation table output voltage attenuation meter to single-chip microcomputer.
In further embodiment of the present invention, decay estimation circuit also includes: preset device, connects single-chip microcomputer, for pre-
If voltage attenuation table output voltage attenuation meter are to single-chip microcomputer.
It should be noted that the voltage attenuation table being automatically adjusted pattern and manual adjustment mode is different, it is automatically adjusted
The voltage attenuation table of pattern is to obtain after formula is changed, and the voltage attenuation table of manual adjustment mode is the electricity tested in advance
Pressure attenuation meter.Attenuation meter maker can generate voltage attenuation table according to formula.Default device can input and store and test in advance
Good voltage attenuation table.
Being automatically adjusted under pattern, single-chip microcomputer calculates pad value according to voltage attenuation curve, and by attenuation processing circuit pair
Signal is decayed.Single-chip microcomputer stores voltage attenuation curve.As in figure 2 it is shown, voltage attenuation curve is to test in advance
The pad value (unit: dB) of voltage attenuation table of adjustable optical attenuator after formula (Y be pad value, W be weights) conversion with
The curve chart that driving voltage is drawn jointly, the electricity just obtained as shown in Figure 2 of mapping after carrying out linear interpolation with MATLAB software
Pressure attenuation curve.Under manual adjustment mode, single-chip microcomputer calculates pad value according to voltage attenuation curve, and by attenuation processing circuit
Signal is decayed.Single-chip microcomputer stores voltage attenuation curve.As it is shown on figure 3, voltage attenuation curve is according to surveying in advance
The data mapping of the voltage attenuation table tried, the abscissa in table is the driving voltage of adjustable optical attenuator, and vertical coordinate is adjustable
The pad value of optical attenuator.All data on curve are all saved in single-chip microcomputer, can lead to after single-chip microcomputer receives the signal of telecommunication
Cross the attenuation meter that inquiry is saved in single-chip microcomputer, obtain driving voltage and pad value.Amplifying circuit and variable optical attenuation circuit root
According to driving voltage and pad value, signal is made respective attenuation, then output signal, and show pad value.
As shown in Figure 4, when by realizing the pattern that is automatically adjusted of adjustable optical attenuator to single-chip microcomputer and manually regulating mould
During formula, wherein, it is automatically adjusted under pattern, photodetector output signal is passed to single-chip microcomputer after analog to digital conversion circuit is changed,
Single-chip microcomputer processes signal through flow chart as depicted.In this mode, flow chart is circulation, is automatically adjusted under pattern
Voltage attenuation curve is as shown in Figure 2.It is automatically adjusted under pattern, the photodetection signal that analog to digital conversion circuit is changed is passed to monolithic
Machine, wherein voltage U0=5.1V, weights W0=0.65, single-chip microcomputer receives signal, and according to formula Δ W=2.41U-2.01 and W
=W+ Δ W obtains weights W.If weights 0 < W < 1, the then table being saved in single-chip microcomputer by inquiry, obtain driving voltage and decay
Value, and optical signal is exported to the first loader from feedback circuit be circulated work.If weights W=1, the pattern of being automatically adjusted is stopped
Only work, the output voltage V=0 of adjustable optical attenuator, weights W=1.If weights W > 1 or W=0, the pattern that is automatically adjusted stops work
Make, the output voltage V=10.6 of adjustable optical attenuator, weights W=0.And under manual adjustment mode, potentiometer dividing potential drop is obtained
Voltage digital signal after digital-to-analogue conversion is sent to single-chip microcomputer.Single-chip microcomputer processes signal through flow chart as shown in Figure 4, manually
The voltage attenuation curve of shaping modes is as shown in Figure 3.Under manual adjustment mode, the voltage that potentiometer dividing potential drop obtains is turned through digital-to-analogue
Digital signal after changing sends single-chip microcomputer, and single-chip microcomputer receives signal, the table being saved in single-chip microcomputer by inquiry, obtains driving electricity
Pressure and pad value.Signal is made respective attenuation according to driving voltage and pad value, so by amplifying circuit and variable optical attenuation circuit
Rear output signal, and show pad value.
It should be appreciated that the above-mentioned detailed description of the invention of the present invention is used only for exemplary illustration or explains the present invention's
Principle, and be not construed as limiting the invention.Therefore, that is done in the case of without departing from spirit and scope of the present invention is any
Amendment, equivalent, improvement etc., should be included within the scope of the present invention.Additionally, claims purport of the present invention
Whole within containing the equivalents falling into scope and border or this scope and border change and repair
Change example.
Claims (10)
1. an auto-manual adjustable optical attenuator, can automatically and manually deamplification energy, wherein, including the light being sequentially connected with
Electrical resistivity survey slowdown monitoring circuit, decay estimation circuit and attenuation processing circuit, also include potentiometer:
Described photodetection circuit is for being converted to the signal of telecommunication by the optical signal received；
Described potentiometer connects described decay estimation circuit, for receiving and export the different signals of telecommunication to described decay measuring and calculating electricity
Road；
Described decay estimation circuit is driven after calculating according to the signal of telecommunication that described photodetection circuit or described potentiometer export
Galvanic electricity pressure and pad value, output to described attenuation processing circuit；
Described attenuation processing circuit receives driving voltage and pad value, makes signal accordingly according to driving voltage and pad value
Decay, and export optical signal.
A kind of auto-manual adjustable optical attenuator the most according to claim 1, wherein, also includes:
Feedback circuit, connects described attenuation processing circuit, is used for inputting another signal so that another signal and attenuation processing circuit
The optical signal of output interacts and obtains the light signal fed back of different delayed time correspondence difference luminous power.
A kind of auto-manual adjustable optical attenuator the most according to claim 1, wherein, also includes:
Display circuit, connects described attenuation processing circuit, for showing the pad value of described attenuation processing circuit.
A kind of auto-manual adjustable optical attenuator the most according to claim 1, wherein, also includes:
Clock signal circuit, connects described photodetection circuit or described potentiometer, for being compared by the signal received
After, produce a clock signal transmission controlled to described decay estimation circuit.
A kind of auto-manual adjustable optical attenuator the most according to claim 1, wherein, also includes auto-manual switch bar,
It is automatically adjusted pattern and manual adjustment mode for switching.
A kind of auto-manual adjustable optical attenuator the most according to claim 1, wherein, also includes:
First loader, connects described photodetection circuit or described potentiometer, is used for receiving and export the first signal to described
Photodetection circuit or described potentiometer；
Second loader, connects described attenuation processing circuit, is used for receiving and export secondary signal to described attenuation processing circuit.
7. according to any one the auto-manual adjustable optical attenuator described in claim 1-6, wherein, described decay estimation circuit bag
Include analog to digital conversion circuit, single-chip microcomputer and the D/A converting circuit being sequentially connected with:
Analog-digital conversion circuit as described connects described photodetection circuit, described clock signal circuit or described potentiometer, and being used for will
The signal of telecommunication received is converted to digital signal and is sent to described single-chip microcomputer；
After described single-chip microcomputer receives digital signal, the voltage attenuation table being stored in described single-chip microcomputer by inquiry obtains adjustable
The driving voltage of optical attenuator and pad value；
Described D/A converting circuit is connected with described attenuation processing circuit, for being turned by the digital signal that described single-chip microcomputer exports
It is changed to the signal of telecommunication.
8. according to any one the auto-manual adjustable optical attenuator described in claim 1-6, wherein, described attenuation processing circuit bag
Include the amplifying circuit being connected and variable optical attenuation circuit:
Described amplifying circuit connects described decay estimation circuit, for driving voltage and the pad value of receiving attenuation estimation circuit,
And drive described variable optical attenuation circuit, make described variable optical attenuation circuit make respective attenuation.
A kind of auto-manual adjustable optical attenuator the most according to claim 7, wherein, described decay estimation circuit also wraps
Include:
Attenuation meter maker, connects described single-chip microcomputer, is used for generating voltage attenuation table output voltage attenuation meter to described monolithic
Machine.
A kind of auto-manual adjustable optical attenuator the most according to claim 7, wherein, described decay estimation circuit also wraps
Include:
Preset device, connect described single-chip microcomputer, for predeterminated voltage attenuation meter output voltage attenuation meter extremely described single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610607324.0A CN106100785A (en) | 2016-07-28 | 2016-07-28 | A kind of auto-manual adjustable optical attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610607324.0A CN106100785A (en) | 2016-07-28 | 2016-07-28 | A kind of auto-manual adjustable optical attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106100785A true CN106100785A (en) | 2016-11-09 |
Family
ID=57479207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610607324.0A Pending CN106100785A (en) | 2016-07-28 | 2016-07-28 | A kind of auto-manual adjustable optical attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106100785A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105824077A (en) * | 2016-01-18 | 2016-08-03 | 国家电网公司 | Intelligent optical attenuator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223181A (en) * | 2011-06-16 | 2011-10-19 | 安徽问天量子科技股份有限公司 | Control method of electrical variable optical attenuator and optical attenuation system |
| CN102289197A (en) * | 2011-03-25 | 2011-12-21 | 武汉光迅科技股份有限公司 | Integrated control system and control method for variable optical attenuator |
| CN102778613A (en) * | 2011-05-10 | 2012-11-14 | 北京浦丹光电技术有限公司 | Performance index test method of PIN-FET (p-intrinsic-n field effect transistor) light receiving assembly |
| CN103744144A (en) * | 2013-12-30 | 2014-04-23 | 深圳市伽蓝特科技有限公司 | Variable optical attenuator |
| CN104760921A (en) * | 2015-04-09 | 2015-07-08 | 上海新微技术研发中心有限公司 | Digitally-controlled MEMS (micro-electromechanical systems) variable optical attenuator and control method |
| CN105159080A (en) * | 2015-08-31 | 2015-12-16 | 武汉光迅科技股份有限公司 | Variable optical attenuator control method and system based on automatic calibration and intelligent learning |
| CN205986904U (en) * | 2016-07-28 | 2017-02-22 | 北京交通大学 | Automatic manual adjustable optical attenuator |
-
2016
- 2016-07-28 CN CN201610607324.0A patent/CN106100785A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289197A (en) * | 2011-03-25 | 2011-12-21 | 武汉光迅科技股份有限公司 | Integrated control system and control method for variable optical attenuator |
| CN102778613A (en) * | 2011-05-10 | 2012-11-14 | 北京浦丹光电技术有限公司 | Performance index test method of PIN-FET (p-intrinsic-n field effect transistor) light receiving assembly |
| CN102223181A (en) * | 2011-06-16 | 2011-10-19 | 安徽问天量子科技股份有限公司 | Control method of electrical variable optical attenuator and optical attenuation system |
| CN103744144A (en) * | 2013-12-30 | 2014-04-23 | 深圳市伽蓝特科技有限公司 | Variable optical attenuator |
| CN104760921A (en) * | 2015-04-09 | 2015-07-08 | 上海新微技术研发中心有限公司 | Digitally-controlled MEMS (micro-electromechanical systems) variable optical attenuator and control method |
| CN105159080A (en) * | 2015-08-31 | 2015-12-16 | 武汉光迅科技股份有限公司 | Variable optical attenuator control method and system based on automatic calibration and intelligent learning |
| CN205986904U (en) * | 2016-07-28 | 2017-02-22 | 北京交通大学 | Automatic manual adjustable optical attenuator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105824077A (en) * | 2016-01-18 | 2016-08-03 | 国家电网公司 | Intelligent optical attenuator |
| CN105824077B (en) * | 2016-01-18 | 2019-01-04 | 国网浙江台州市路桥区供电公司 | intelligent optical attenuator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101958750B (en) | Optical parametric amplifier-based all-optical signal quality monitor | |
| CN105388637B (en) | A kind of thermo-optical switch of SOI base MZI types 1 × 2 based on dielectric deposition type surface plasma waveguide | |
| CN102882601B (en) | Silicon photonic integrated high-speed optical communication transceiver module | |
| CN101296037B (en) | Apparatus and method for light-operated controlling light delay line based on silicon based micro-ring | |
| CN101800598A (en) | New balance detection bias control method for MZ external modulator | |
| CN202872791U (en) | A high-speed optical communication transmitting and receiving module using silicon photon integration technology | |
| CN103176294A (en) | All-fiber electro-optical modulator based on graphene materials and method thereof | |
| CN113534504B (en) | Electronically controlled adjustable polarization beam splitting method and device based on film lithium niobate | |
| CN101377420A (en) | Wide spectrum optical fiber light source with stable optical power and average wave length | |
| CN101807085A (en) | Device for controlling and driving biasing and method for controlling and driving light intensity modulator | |
| CN205986904U (en) | Automatic manual adjustable optical attenuator | |
| CN106100785A (en) | A kind of auto-manual adjustable optical attenuator | |
| CN110501783B (en) | Few-mode fiber beam forming system | |
| CN101435899B (en) | Full optical fiber integrated optical power monitor and manufacturing method thereof | |
| CN107834351A (en) | A kind of 1 mu m waveband post vector optical fiber laser based on model selection coupler | |
| CN104880768B (en) | A kind of tunable optical power distributor | |
| CN202048988U (en) | High-sensitivity up-conversion single photon detecting system | |
| CN101833138B (en) | Method for manufacturing polarization-independent grating coupler | |
| CN104317139A (en) | Multi-wavelength all-optical 3R regenerative apparatus based on magnetic control optical fiber parametric oscillator | |
| CN107102454A (en) | Unrelated absorption-type electrooptic modulator is polarized based on tin indium oxide optical-fiber type | |
| CN109194411A (en) | A kind of device and method measuring silicon light coherent receiver Photoresponse | |
| CN206788415U (en) | A kind of optical filter | |
| CN101299650B (en) | Apparatus for converting double channel wavelength based on mode splitting silicon based micro-ring | |
| CN105652477A (en) | Multi-core optical fiber modulator | |
| CN108123757B (en) | Device and method for rapid automatic calibration and attenuation control based on MCVOA |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |