CN107547140A - A kind of control method and device of optical demodulator bias point - Google Patents
A kind of control method and device of optical demodulator bias point Download PDFInfo
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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
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- H04B10/69—Electrical arrangements in the receiver
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Abstract
The present invention provides a kind of control method and device of optical demodulator bias point, wherein, the control method includes：Receive the feedback voltage signal of digital analog converter DAC outputs；Default perturbation signal is increased to feedback voltage signal, obtains first voltage signal；First voltage signal is subjected to signal transacting, exports the bias that the optical signal to delay line interferometer DLI, formed for being received to DLI carries out phase push-and-pull by drive circuit through DAC.So, it can solve the problem that the DLI of existing free space fiber waveguide in actually controlling, slow thermal response time can bring vibration to control loop, influence the stability and efficiency of DLI controls, the problem of making DQPSK optical demodulators can not be locked on correct bias point, realize the optimization to loop response.
Description
Technical field
The present invention relates to optical communication field, particularly relates to a kind of control method and device of optical demodulator bias point.
Background technology
The optical demodulator of phase-modulation based on free space optical waveguide technique, due to the temperature stability of free space
By force, so whole waveguide is without temperature control, the complexity of control circuit is reduced.Fiber waveguide is heated by metalfilmresistor
The principle expanded with heat and contract with cold, light path is changed to change the interferometric phase of interferometer, as shown in figure 1, DQPSK (Differential
Quadrature Reference Phase Shift Keying, four phase RPSK relative phase shift keyings) optical demodulator structured flowchart,
Light path is divided into after the optical signal received is passed through into DLI (Delay Line Interferometer, delay line interferometer)
Four-way is exported, into double balanced recivers, realizes that optical signal is changed to electric signal, wherein, DLI controls output voltage values with right
The optical signal for entering light input enters horizontal phasing control, so that DQPSK optical demodulators are locked on correct bias point.Existing freedom
The DLI of space fiber waveguide is in actually controlling, and because the thermal response time of free space fiber waveguide is grown relative to slab guide, leads to
Second level can often be reached, so slow thermal response time can bring vibration to control loop, influence the stability and effect of DLI controls
Rate, DQPSK optical demodulators can not be locked on correct bias point.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of control method and device of optical demodulator bias point, to solve
For the DLI of existing free space fiber waveguide in actually controlling, slow thermal response time can bring vibration, shadow to control loop
Ring the stability and efficiency of DLI controls, the problem of making DQPSK optical demodulators can not be locked on correct bias point.
In a first aspect, the embodiment of the present invention provides a kind of control method of optical demodulator bias point, the control method includes：
Receive the feedback voltage signal of digital analog converter DAC outputs；
Default perturbation signal is increased to feedback voltage signal, obtains first voltage signal；
First voltage signal is subjected to signal transacting, exported through DAC by drive circuit to delay line interferometer DLI, shape
The bias of phase push-and-pull is carried out into the optical signal for being received to DLI.
Wherein, the step of increasing default perturbation signal to feedback voltage signal, obtaining first voltage signal, includes：
In advance to needing the first perturbation signal for increasing to feedback voltage signal to scramble, while to the first perturbation signal
Shaping is carried out, obtains the second perturbation signal；
Second perturbation signal is increased into feedback voltage signal, obtains first voltage signal.
Wherein, by first voltage signal carry out signal transacting, exported through DAC to delay line interferometer DLI, formed for pair
DLI receive optical signal carry out phase push-and-pull bias the step of include：
Polarity selection is carried out according to first voltage signal；
First voltage signal output to DLI formation is pushed away the first of phase according to polarity selection and biases or draw the second of phase
Bias.
Wherein, first voltage signal is subjected to signal transacting, exported through DAC by drive circuit to delay line interferometer
DLI, forming the step of optical signal for being received to DLI carries out the bias of phase push-and-pull includes：
First voltage signal is carried out to increase default compensation phase, second voltage signal is formed, by second voltage signal
Exported through DAC by drive circuit to DLI, form the bias that the optical signal for being received to DLI carries out phase push-and-pull.
Wherein, first voltage signal is subjected to signal transacting, exported through DAC by drive circuit to delay line interferometer
DLI, forming the step of optical signal for being received to DLI carries out the bias of phase push-and-pull also includes：
Polarity selection is carried out according to first voltage signal；
Second voltage signal output to DLI formation is pushed away the first of phase according to polarity selection and biases or draw the second of phase
Bias.
Second aspect, the embodiment of the present invention provide a kind of control device of optical demodulator bias point, and the control device includes：
Receiving module, for receiving the feedback voltage signal of digital analog converter DAC outputs；
First processing module, for increasing default perturbation signal to feedback voltage signal, obtain first voltage signal；
Second processing module, for first voltage signal to be carried out into signal transacting, exported through DAC by drive circuit to prolonging
Slow line interferometer DLI, form the bias that the optical signal for being received to DLI carries out phase push-and-pull.
Wherein, first processing module includes：
First processing units, in advance to needing the first perturbation signal for increasing to feedback voltage signal to scramble,
Shaping is carried out to the first perturbation signal simultaneously, obtains the second perturbation signal；
Second processing unit, for the second perturbation signal to be increased into feedback voltage signal, obtain first voltage signal.
Wherein, Second processing module includes：
First polarity selection unit, for carrying out polarity selection according to first voltage signal；
First forms unit, and the first of phase is pushed away for forming first voltage signal output to DLI according to polarity selection
Bias or the second bias for drawing phase.
Wherein, Second processing module includes：
Second processing unit, for carrying out first voltage signal to increase default compensation phase, form second voltage letter
Number, second voltage signal is exported to DLI through DAC by drive circuit, the optical signal for being received to DLI is formed and carries out phase
The bias of position push-and-pull.
Wherein, Second processing module also includes：
Second polarity selection unit, for carrying out polarity selection according to first voltage signal；
Second forms unit, and the first of phase is pushed away for forming second voltage signal output to DLI according to polarity selection
Bias or the second bias for drawing phase.
Compared with prior art, the control method and device of optical demodulator bias point provided in an embodiment of the present invention, pass through
Receive the feedback voltage signal of digital analog converter DAC outputs；Default perturbation signal is increased to feedback voltage signal, obtained
First voltage signal；First voltage signal is subjected to signal transacting, exported through DAC by drive circuit to delay line interferometer
DLI, the bias that the optical signal for being received to DLI carries out phase push-and-pull is formed, realizes the optimization to loop response, to solve
For the DLI of existing free space fiber waveguide in actually controlling, slow thermal response time can bring vibration, shadow to control loop
Ring the stability and efficiency of DLI controls, the problem of making DQPSK optical demodulators can not be locked on correct bias point.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed for being described below to the embodiment of the present invention
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, without having to pay creative labor, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 represents the structured flowchart of DQPSK optical demodulators；
Fig. 2 represents a kind of circuit diagram that DLI is controlled in the embodiment of the present invention；
Fig. 3 represents the schematic flow sheet of the control method of optical demodulator bias point provided in an embodiment of the present invention；
Fig. 4 is represented in the embodiment of the present invention to the waveform diagram before and after the first perturbation signal shaping；
Fig. 5 represents to carry out the phase offset schematic diagram after phase compensation in the embodiment of the present invention；
Fig. 6 represents a kind of example schematic diagram of the control method of optical demodulator bias point provided in an embodiment of the present invention；
Fig. 7 represents the structural representation of the control device of optical demodulator bias point provided in an embodiment of the present invention.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
Referring to Fig. 2, in a kind of circuit diagram of DLI controls, the circuit of DLI controls includes the first DAC (Digital
To analog converter, digital analog converter), the 2nd DAC, be connected with the first DAC output end first driving electricity
Road, the second drive circuit being connected with the 2nd DAC output end, first bleeder circuit in parallel with the first drive circuit, with the
Two drive circuits the second bleeder circuit and DLI bias outputs in parallel, the first DLI bias outputs drive with first respectively
Circuit, the second drive circuit, the first bleeder circuit and the connection of the second bleeder circuit.Wherein, the first drive circuit includes first
Amplifier and the first MOS (metal oxide semiconductor, Metal-oxide-semicondutor) pipes, the second drive circuit
Including the second amplifier and the second metal-oxide-semiconductor.Export, pass through after the first DAC receives the signal of gain control output and deals with
First amplifier is amplified and drives the first MOS switch, to control the conducting degree of the first metal-oxide-semiconductor, so as to control the first MOS
Size of current on pipe, then exported by DLI bias outputs to DLI, to change DLI heating intensity, make DLI phases in itself
Position changes, and realizes the phase-modulation of the optical signal received to DLI.Similarly, gain control output is received in the 2nd DAC
Signal and export after dealing with, be amplified through the second amplifier and drive the 2nd MOS switch, to control the second metal-oxide-semiconductor
Conducting degree, so as to control the size of current on the second metal-oxide-semiconductor, then exported by DLI bias outputs to DLI, to change
DLI heating intensity, DLI phases itself is changed, realize the phase-modulation of the optical signal received to DLI.Wherein,
One bleeder circuit and the second bleeder circuit are parallel circuit, pass through the first bleeder circuit and the second bleeder circuit, it is possible to achieve right
The inhibitory action of power supply noise.In addition, when the first DAC connects circuit work, the 2nd DAC connects circuit and not worked, together
Reason, when the 2nd DAC connects circuit work, the first DAC connects circuit and not worked.Wherein, the first DAC and the 2nd DAC can
With and for same DAC devices.
Fig. 3 is referred to, it is illustrated that the flow of the control method of optical demodulator bias point provided in an embodiment of the present invention
Schematic diagram, the embodiment of the present invention provide a kind of control method of optical demodulator bias point, and the control method includes：
Step 301, the feedback voltage signal of digital analog converter DAC outputs is received.
Here, the feedback voltage signal of the feedback voltage output in DAC is received, subsequently to be carried out to feedback voltage signal
Processing.
Step 302, default perturbation signal is increased to feedback voltage signal, obtains first voltage signal；
Here, default perturbation signal is increased to feedback voltage signal, obtains first voltage signal, it is default by increasing
Perturbation signal, the default perturbation signal are the very small preset signals of a disturbance, useful signal are disturbed, Ke Yishi
Now to the optimization of loop response.Wherein, the default perturbation signal is the pulse signal that positive pulse and negative pulse form.
Step 303, first voltage signal is subjected to signal transacting, exported through DAC by drive circuit to delay line interference
Instrument DLI, form the bias that the optical signal for being received to DLI carries out phase push-and-pull.
Here, first voltage signal is carried out to predetermined signal processing operations, then the output end through DAC, then passes through drive
Dynamic circuit output forms bias, phase push-and-pull is carried out with the optical signal received to DLI to DLI.
In one embodiment, step 302, default perturbation signal is increased to feedback voltage signal, obtains first voltage letter
Number the step of include：
In advance to needing the first perturbation signal for increasing to feedback voltage signal to scramble, while to the first perturbation signal
Shaping is carried out, obtains the second perturbation signal.
Here, referring to Fig. 4, when being scrambled with the first perturbation signal needed to increase in feedback voltage signal, by
One perturbation signal shaping be easy to sampling square-wave signal (i.e. the second perturbation signal), using a cycle of perturbation waveform as
Example, when the positive pulse for carrying out first the first perturbation signal scrambles, i.e. t0To t1Time, to the positive pulse of the first perturbation signal
Sawtooth shaping (sawtooth waveforms reparation) is done, sawtooth waveforms is shaped as square wave, to the hangover time τ of thermal responselagLater, in area of light
Response voltage (Vc) just complete a normal response square wave [t0,t1]+τlag, response intensity Vc1, the response square wave is
For the second perturbation signal.Similarly, the t that positive pulse terminates2Time carries out the sawtooth shaping of negative pulse, and according to this, the first perturbation is believed
Number it is shaped as complete second perturbation signal.In addition, in the section of whole second perturbation signal, disabling auto zero enables,
Synchronous detection is enabled simultaneously synchronizes data monitoring, so, can make the second perturbation signal by normal reduction and gather.
Second perturbation signal is increased into feedback voltage signal, obtains first voltage signal.
Here, feedback voltage signal is increased to by the second perturbation signal for obtaining shaping, obtains first voltage signal.
In one embodiment, step 303, first voltage signal is subjected to signal transacting, exported through DAC to delay line interference
Instrument DLI, formed includes for receiving the step of optical signal carries out the bias of phase push-and-pull to DLI：
Polarity selection is carried out according to first voltage signal；
First voltage signal output to DLI formation is pushed away the first of phase according to polarity selection and biases or draw the second of phase
Bias.
Here, polarity selection is carried out according to first voltage signal, to judge to first voltage signal final output to DLI shapes
The optical signal that paired DLI is received carries out the first bias or the second bias of phase push-and-pull, and the first bias is handled through DLI to be exported
To push away phase, the second bias handles output to draw phase through DLI；Then according to polarity select DLI output first bias or
Second bias.So, you can to realize the optimization to loop response, solve the DLI of existing free space fiber waveguide in reality
In control, slow thermal response time can bring vibration to control loop, influence the stability and efficiency of DLI controls, make DQPSK
The problem of optical demodulator can not be locked on correct bias point.
In addition, in actually controlling, DAC outputs are being had close to phase zero points by the DLI of existing free space fiber waveguide
Dead band, cause the region DLI adjust it is invalid, therefore, in one embodiment, step 303, first voltage signal is carried out into letter
Number processing, the optical signal to delay line interferometer DLI, formed for being received to DLI is exported by drive circuit through DAC and is carried out
The step of bias of phase push-and-pull, includes：
First voltage signal is carried out to increase default compensation phase, second voltage signal is formed, by second voltage signal
Exported through DAC by drive circuit to DLI, form the bias that the optical signal for being received to DLI carries out phase push-and-pull.
Here, compensation phase (θ default to the increase of first voltage signaloffset), second voltage signal is formed, then will
Second voltage signal ultimately forms the first bias or the second bias output to DLI, is formed through DLI processing and pushes away phase or drawing phase.
Referring to Fig. 5, now, the first bias or the second bias push away phase (θ through what DLI processing was formedPush) or drawing phase (θPull) increase
There is compensation phase (θoffset), that is, push away phase and draw the establishment formula of phase as follows：
Now, due to pushing away phase or drawing the phase that phase is all the optical signal for changing DLI receptions, total change of phase controlling
Amount, i.e. DLI phases (θDLI) be phase push-and-pull total effect, that is, push away phase and draw the difference of both phases, then according to following public
Formula：
θDLI=θPush-θPull
DLI phases (the θ of phase controllingDLI) keep constant.Therefore, increased compensation phase (θoffset) simply change
DLI phase controllings push away phase (θPush) and drawing phase (θPull) absolute value, now, as shown in Figure 5, push away phase and draw phase
The intersection point of position, i.e. phase zero points are not 0, and this can be avoided (pushing away phase by the control point of " push-and-pull " alternation and drawing phase
Intersection point) when, due to θoffset≠ 0 the blind area of control of DLI bias variations and DLI phase invariants would not occurs, that is, be not in
θoffset=0 dead-time problem brought, while both differences are not influenceed.
On the basis of above-described embodiment, in an embodiment, step 303, first voltage signal is subjected to signal transacting, warp
DAC is exported the optical signal to delay line interferometer DLI, formed for being received to DLI by drive circuit and carries out phase push-and-pull
Bias the step of also include：
Polarity selection is carried out according to first voltage signal；
Second voltage signal output to DLI formation is pushed away the first of phase according to polarity selection and biases or draw the second of phase
Bias.
Polarity selection is carried out according to first voltage signal, DLI received with judging to be formed to DLI through DAC final outputs
Optical signal carry out the first bias or the second bias of phase push-and-pull, the first bias through DLI outputs to push away phase, the second bias
It is drawing phase through DLI outputs；Then selected second voltage signal output to DLI being formed as the first bias or the according to polarity
Two biass.So, you can to realize the optimization to loop response, solve the DLI of existing free space fiber waveguide in actual control
In system, slow thermal response time can bring vibration to control loop and the dead band of DAC outputs is had close to phase zero points, make
DLI regulations into the region are invalid, influence the stability and efficiency of DLI controls, DQPSK optical demodulators can not be locked in correctly
Bias point on the problem of.
Referring to Fig. 6, in one example, default perturbation is increased to the feedback voltage signal that the feedback voltage in DAC exports
Signal, obtain first voltage signal (XDLI), phase offset (i.e. increase compensation phase) is then added to first voltage signal, together
When, polarity selection is carried out according to first voltage signal, to control the output time solt of push-and-pull phase, realized to DLI phase controllings
Push away phase and draw the output respectively of phase.
The control method of optical demodulator bias point provided in an embodiment of the present invention, by receiving digital analog converter DAC
The feedback voltage signal of output；Default perturbation signal is increased to feedback voltage signal, obtains first voltage signal；By the first electricity
Press signal to carry out signal transacting, exported through DAC by drive circuit to delay line interferometer DLI, formed for being received to DLI
Optical signal carry out phase push-and-pull bias, the optimization to loop response is realized, to solve existing free space fiber waveguide
For DLI in actually controlling, slow thermal response time can bring vibration to control loop, influence the stability and effect of DLI controls
Rate, the problem of making DQPSK optical demodulators can not be locked on correct bias point.
Based on above method, the embodiment of the present invention also provides a kind of implementing the system of the above method.Refer to Fig. 7,
It is illustrated that the structural representation of the control device of optical demodulator bias point provided in an embodiment of the present invention, the embodiment of the present invention
A kind of control device of optical demodulator bias point is provided, the control device includes：Receiving module 710, first processing module 720 with
And Second processing module 730.
Receiving module 710, for receiving the feedback voltage signal of digital analog converter DAC outputs；
First processing module 720, for increasing default perturbation signal to feedback voltage signal, obtain first voltage letter
Number；
Second processing module 730, for first voltage signal to be carried out into signal transacting, exported through DAC by drive circuit
To delay line interferometer DLI, the bias that the optical signal for being received to DLI carries out phase push-and-pull is formed.
Wherein, first processing module 720 includes：First processing units and second processing unit.
First processing units, in advance to needing the first perturbation signal for increasing to feedback voltage signal to scramble,
Shaping is carried out to the first perturbation signal simultaneously, obtains the second perturbation signal；
Second processing unit, for the second perturbation signal to be increased into feedback voltage signal, obtain first voltage signal.
Wherein, Second processing module 730 includes：First polarity selection unit and the first formation unit.
First polarity selection unit, for carrying out polarity selection according to first voltage signal；
First forms unit, and the first of phase is pushed away for forming first voltage signal output to DLI according to polarity selection
Bias or the second bias for drawing phase.
Wherein, Second processing module 730 includes：Second processing unit.
Second processing unit, for carrying out first voltage signal to increase default compensation phase, form second voltage letter
Number, second voltage signal is exported to DLI through DAC by drive circuit, the optical signal for being received to DLI is formed and carries out phase
The bias of position push-and-pull.
Wherein, Second processing module 730 also includes：Second polarity selection unit and the second formation unit.
Second polarity selection unit, for carrying out polarity selection according to first voltage signal；
Second forms unit, and the first of phase is pushed away for forming second voltage signal output to DLI according to polarity selection
Bias or the second bias for drawing phase.
The optical demodulator bias point that the control device for the optical demodulator bias point that above-described embodiment provides provides with embodiment
Control method belong to same design, its specific implementation process refer to above-described embodiment offer method, to avoid repeating, here
Repeat no more.
The control device of optical demodulator bias point provided in an embodiment of the present invention, by receiving digital analog converter DAC
The feedback voltage signal of output；Default perturbation signal is increased to feedback voltage signal, obtains first voltage signal；By the first electricity
Press signal to carry out signal transacting, exported through DAC by drive circuit to delay line interferometer DLI, formed for being received to DLI
Optical signal carry out phase push-and-pull bias, the optimization to loop response is realized, to solve existing free space fiber waveguide
For DLI in actually controlling, slow thermal response time can bring vibration to control loop, influence the stability and effect of DLI controls
Rate, the problem of making DQPSK optical demodulators can not be locked on correct bias point.
For foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, still
Those skilled in the art should know that the present invention is not limited by described sequence of movement, because according to the present invention, it is some
Step can use other orders or carry out simultaneously.Secondly, those skilled in the art should also know, described in the specification
Embodiment belong to preferred embodiment, involved action is not necessarily essential to the invention.
It should be noted that in inventive embodiments, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are causing a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of control method of optical demodulator bias point, it is characterised in that the control method includes：
Receive the feedback voltage signal of digital analog converter DAC outputs；
Default perturbation signal is increased to the feedback voltage signal, obtains first voltage signal；
First voltage signal is subjected to signal transacting, is exported through DAC by drive circuit to delay line interferometer DLI, is formed and used
The bias of phase push-and-pull is carried out in the optical signal received to the DLI.
2. control method according to claim 1, it is characterised in that described default to feedback voltage signal increase
Perturbation signal, the step of obtaining first voltage signal, include：
In advance to needing the first perturbation signal for increasing to the feedback voltage signal to scramble, while to first perturbation
Signal carries out shaping, obtains the second perturbation signal；
The second perturbation signal is increased into the feedback voltage signal, obtains first voltage signal.
3. control method according to claim 1, it is characterised in that it is described that first voltage signal is subjected to signal transacting,
Export and to delay line interferometer DLI, formed for receiving the step of optical signal carries out the bias of phase push-and-pull to DLI through DAC
Including：
Polarity selection is carried out according to first voltage signal；
The first voltage signal output to DLI is formed according to polarity selection and pushes away the first bias of phase or draws phase
Second bias.
4. control method according to claim 1, it is characterised in that described to carry out the first voltage signal at signal
Reason, the optical signal to delay line interferometer DLI, formed for being received to the DLI is exported by drive circuit through DAC and is carried out
The step of bias of phase push-and-pull, includes：
The first voltage signal is carried out to increase default compensation phase, second voltage signal is formed, by the second voltage
Signal is exported to DLI through DAC by drive circuit, is formed the optical signal for being received to the DLI and is carried out phase push-and-pull
Bias.
5. control method according to claim 4, it is characterised in that described to carry out the first voltage signal at signal
Reason, the optical signal to delay line interferometer DLI, formed for being received to the DLI is exported by drive circuit through DAC and is carried out
The step of bias of phase push-and-pull, also includes：
Polarity selection is carried out according to first voltage signal；
The second voltage signal output to DLI is formed according to polarity selection and pushes away the first bias of phase or draws phase
Second bias.
6. a kind of control device of optical demodulator bias point, it is characterised in that the control device includes：
Receiving module, for receiving the feedback voltage signal of digital analog converter DAC outputs；
First processing module, for increasing default perturbation signal to the feedback voltage signal, obtain first voltage signal；
Second processing module, for first voltage signal to be carried out into signal transacting, exported through DAC by drive circuit to delay line
Interferometer DLI, form the bias that the optical signal for being received to the DLI carries out phase push-and-pull.
7. control device according to claim 6, it is characterised in that the first processing module includes：
First processing units, in advance to needing the first perturbation signal for increasing to the feedback voltage signal to scramble,
Shaping is carried out to the first perturbation signal simultaneously, obtains the second perturbation signal；
Second processing unit, for the second perturbation signal to be increased into the feedback voltage signal, obtain first voltage letter
Number.
8. control device according to claim 6, it is characterised in that the Second processing module includes：
First polarity selection unit, for carrying out polarity selection according to first voltage signal；
First forms unit, and phase is pushed away for forming the first voltage signal output to DLI according to polarity selection
First bias or the second bias for drawing phase.
9. control device according to claim 6, it is characterised in that the Second processing module includes：
Second processing unit, for carrying out the first voltage signal to increase default compensation phase, form second voltage letter
Number, the second voltage signal is exported to DLI through DAC by drive circuit, forms the light letter for being received to the DLI
Number carry out phase push-and-pull bias.
10. control device according to claim 9, it is characterised in that the Second processing module also includes：
Second polarity selection unit, for carrying out polarity selection according to first voltage signal；
Second forms unit, and phase is pushed away for forming the second voltage signal output to DLI according to polarity selection
First bias or the second bias for drawing phase.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610482489.XA CN107547140A (en) | 2016-06-28 | 2016-06-28 | A kind of control method and device of optical demodulator bias point |
| PCT/CN2017/090535 WO2018001271A1 (en) | 2016-06-28 | 2017-06-28 | Method and device generating bias signal of delay line interferometer |
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| CN201610482489.XA CN107547140A (en) | 2016-06-28 | 2016-06-28 | A kind of control method and device of optical demodulator bias point |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824507A (en) * | 2020-06-19 | 2021-12-21 | 圣邦微电子（北京）股份有限公司 | Transmitter for optical communication and bias point compensation apparatus and method |
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| CN103281137B (en) * | 2013-05-03 | 2016-08-10 | 武汉电信器件有限公司 | DQPSK module delays interferometer controls device and control method thereof |
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| CN1870472A (en) * | 2005-05-23 | 2006-11-29 | 富士通株式会社 | Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them |
| CN102223333A (en) * | 2011-06-13 | 2011-10-19 | 中兴通讯股份有限公司 | Bias point control method and device of DQPSK (Differential Quaternary Reference Phase Shift Keying) demodulator |
| CN104901746A (en) * | 2014-03-05 | 2015-09-09 | 北京邮电大学 | Device and method for stabilizing any bias point of external modulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113824507A (en) * | 2020-06-19 | 2021-12-21 | 圣邦微电子（北京）股份有限公司 | Transmitter for optical communication and bias point compensation apparatus and method |
| CN113824507B (en) * | 2020-06-19 | 2023-06-09 | 圣邦微电子（北京）股份有限公司 | Transmitter for optical communication and offset point compensation device and method |
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| WO2018001271A1 (en) | 2018-01-04 |
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