CN102143105B - Control device and method for improving stability of cross point of eye pattern - Google Patents
Control device and method for improving stability of cross point of eye pattern Download PDFInfo
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- CN102143105B CN102143105B CN201110031364.2A CN201110031364A CN102143105B CN 102143105 B CN102143105 B CN 102143105B CN 201110031364 A CN201110031364 A CN 201110031364A CN 102143105 B CN102143105 B CN 102143105B
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- voltage
- temperature
- modulated laser
- reference voltage
- electroabsorption modulated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/504—Laser transmitters using direct modulation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/17—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169
- G02F1/174—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169 based on absorption band-shift, e.g. Stark - or Franz-Keldysh effect
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Semiconductor Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a control device and a control method for improving the stability of a cross point of an eye pattern. The control device comprises a cross point control module. The cross point control module comprises a voltage setting unit and a feedback control unit, wherein the voltage setting unit is used for setting a reference voltage; and the feedback control unit is used for performing feedback control on a cross point voltage corresponding to the cross point of the output eye pattern of an electro-absorption modulated laser to make a difference between the cross point voltage and the reference voltage in a preset range. In the device and the method, the feedback control over the cross point voltage of the laser can suppress the drift of the cross point of the electro-absorption modulated laser, improve the jitter performance of the emergent eye pattern and reduce the code error rate of the transmission end of the module, thereby improving the overall performance of an integrated light emitting and receiving module.
Description
Technical field
The present invention relates to digital optical fiber transmit system technical field, particularly relate to a kind of control device and the method that improve stability of cross point of eye pattern.
Background technology
Along with the development of optical communication technique, light transmitting-receiving unification module has been applied in Fiber Optical Communication System more and more widely, light transmitting-receiving unification module is mainly used in carrying out electrical/optical, light/electricity conversion, be one of key modules of Fiber Optical Communication System, its performance is to Fiber Optical Communication System performance index important.Speed is that the client's sidelight transmitting-receiving unification module in the Fiber Optical Communication System of 40G or more than 40G uses Electroabsorption Modulated Laser (Electro-absorption Modulated Laser usually, being called for short EML) device (this device is the combination unit of Electroabsorption Modulated Laser and driver or comprises the Electroabsorption Modulated Laser of driver) completes the conversion that electricity arrives light, the light eye pattern index of laser, as extinction ratio, crosspoints etc. directly affect the Distance geometry error rate that signal transmits in a fiber, very important effect is played to the overall performance of light transmitting-receiving unification module.
Its eye pattern of laser shake that 10G speed compared by the laser of 40G and more than 40G speed is larger, eye pattern allowance is less, crosspoint is easily because the reason that the index of temperature reason or laser power supply and internal resistance produces fluctuation is drifted about, the position change in crosspoint simultaneously can cause the sampled point on eye pattern more easily to drop in eye pattern mask, finally causes the error rate to raise.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of control device improving stability of cross point of eye pattern, improves stability of cross point of eye pattern.
In order to solve the problems of the technologies described above, the invention provides a kind of control device improving stability of cross point of eye pattern; Described control device comprises crosspoint control module; Described crosspoint control module comprises voltage sets unit and feedback control unit; Described voltage sets unit, for setting reference voltage; Described feedback control unit, carries out FEEDBACK CONTROL for the crossover point voltage corresponding to the crosspoint of Electroabsorption Modulated Laser output eye pattern and makes the difference of crossover point voltage and described reference voltage in preset range.
Further, above-mentioned control device can also have following characteristics:
Described voltage sets unit is initial reference voltage for the voltage sets that the crosspoint settling position by expectation is corresponding.
Further, above-mentioned control device can also have following characteristics:
Described control device also comprises temperature compensation module; Described temperature compensation module, for determining bucking voltage amount relative to described initial reference voltage according to detecting the temperature of Electroabsorption Modulated Laser and input to described voltage sets unit; Described voltage sets unit, for adjusting current reference voltage according to described bucking voltage amount.
Further, above-mentioned control device can also have following characteristics:
Described temperature compensation module comprises temperature detecting unit and voltage control unit; Described temperature detection and converting unit, for being sent to described voltage control unit by the voltage corresponding with the temperature of Electroabsorption Modulated Laser; Described voltage control unit, for calculate according to described voltage Electroabsorption Modulated Laser temperature and according to the temperature computation of the Electroabsorption Modulated Laser bucking voltage amount relative to described initial reference voltage.
Further, above-mentioned control device can also have following characteristics:
Described feedback control unit comprises the error controller, controllable current source, the current-to-voltage converter that are connected successively; Also comprise the feedback circuit be connected between controllable current source and the reverse input end of error controller; The positive input of error controller is used for the reference voltage of input voltage setup unit output.
Further, above-mentioned control device can also have following characteristics:
The Electroabsorption Modulated Laser of described Electroabsorption Modulated Laser to be speed be 40G or more than 40G.
In order to solve the problems of the technologies described above, present invention also offers a kind of method improving stability of cross point of eye pattern, comprising: setting reference voltage; The crossover point voltage corresponding to the crosspoint of Electroabsorption Modulated Laser output eye pattern carries out FEEDBACK CONTROL makes the difference of crossover point voltage and described reference voltage in preset range.
Further, said method can also have following characteristics:
Be initial reference voltage by voltage sets corresponding for the crosspoint settling position of expectation.
Further, said method can also have following characteristics:
The bucking voltage amount relative to described initial reference voltage is determined according to the temperature detecting Electroabsorption Modulated Laser; Current reference voltage is adjusted according to described bucking voltage amount.
Further, said method can also have following characteristics:
Determine to comprise relative to the bucking voltage measurer body of described initial reference voltage according to detecting the temperature of Electroabsorption Modulated Laser: determine the voltage corresponding with the temperature of Electroabsorption Modulated Laser, according to described voltage calculate Electroabsorption Modulated Laser temperature and according to the temperature computation of the Electroabsorption Modulated Laser bucking voltage amount relative to described initial reference voltage.
The present invention, by the FEEDBACK CONTROL to laser crossover point voltage, can suppress the drift in Electroabsorption Modulated Laser crosspoint, improve bright dipping eye pattern jitter performance, reduces the error rate of module transmitting terminal, thus promotes the overall performance of light transmitting-receiving unification module.
Accompanying drawing explanation
Fig. 1 is the structure chart of the control device improving stability of cross point of eye pattern in embodiment;
Fig. 2 is the structure chart of the control device improving stability of cross point of eye pattern in embodiment one;
Fig. 3 is the structure chart of the control device improving stability of cross point of eye pattern in embodiment two;
Fig. 4 is crossing point temperature compensated curve;
Fig. 5 is crosspoint control voltage Vx and crosspoint Xp relation curve.
Embodiment
The control device improving stability of cross point of eye pattern comprises crosspoint control module; Crosspoint control module comprises voltage sets unit and feedback control unit.This control device can be realized by FPGA.
Voltage sets unit is for setting reference voltage.
Feedback control unit carries out FEEDBACK CONTROL for the crossover point voltage corresponding to the crosspoint of Electroabsorption Modulated Laser output eye pattern makes the difference of crossover point voltage and described reference voltage in preset range.
Feedback control unit realizes control to preset range by error controller, and feedback control unit controls crossover point voltage and levels off to reference voltage.
The Electroabsorption Modulated Laser of to be speed the be 40G or more than 40G of the Electroabsorption Modulated Laser in the present invention.
Embodiment one
In embodiment one, voltage sets corresponding for the crosspoint settling position of expectation is initial reference voltage by voltage sets unit.Need voltage sets unit can adopt digital regulation resistance and the resistance pressure-dividing network composition of 8-12 position according to control precision.
The index of power supply or internal resistance in laser produces fluctuation thus affect crossover point voltage Vx and to change and then the position that affects crosspoint produces when drifting about, in the present invention, feedback control unit carries out FEEDBACK CONTROL to the crossover point voltage Vx of Electroabsorption Modulated Laser and makes the difference of crossover point voltage and described reference voltage in preset range, crossover point voltage is revised, crossover point voltage is stablized, thus makes the position stability in crosspoint.
As shown in Figure 2, feedback control unit comprises the error controller, controllable current source, the current-to-voltage converter that are connected successively; Also comprise the feedback circuit be connected between controllable current source and the reverse input end of error controller; The positive input of error controller is used for the reference voltage of input voltage setup unit output.
After error controller is responsible for the magnitude of voltage that reference voltage and feedback circuit that voltage sets unit exports feed backs to compare, by the controllable current source of the residual quantity control subordinate of output.Error controller can adopt integrated operational amplifier circuit to realize.
The residual quantity size that controllable current source is responsible for exporting according to prime exports corresponding drive current.This controllable current source can be made up of triode or metal-oxide-semiconductor.
The magnitude of current that current-to-voltage converter is responsible for current source exports converts voltage to.
Feedback circuit is responsible for the reverse input end value of feedback collected via current-to-voltage converter and controllable current source being input to error controller.Feedback circuit can form by resistance capacitance, by changing the parameter of resistance and electric capacity, can improve control precision and response speed.
Under structure shown in Fig. 2, crossover point voltage Vx after index because of power supply in laser or internal resistance is produced the change of fluctuating and causing by feedback circuit collects the reverse input end of error controller, the difference of the voltage that reverse input end inputs as a controller by error controller and the reference voltage that voltage sets unit exports controls the output of controllable current source as a controlled quentity controlled variable, export controllable electric flow, controllable electric flow is converted to the voltage for controlling crossover point voltage Vx by current-to-voltage convertor, crossover point voltage Vx is finally made to be stabilized in the preset range of distance reference voltage, thus stablize cross-point locations.
Embodiment two
In embodiment two, control device also comprises temperature compensation module.
Temperature compensation module is used for determining bucking voltage amount relative to initial reference voltage according to the ambient temperature that detects and inputing to voltage sets unit.
Voltage sets corresponding for the crosspoint settling position of expectation is initial reference voltage by voltage sets unit, and adjusts current reference voltage according to described bucking voltage amount.Need voltage sets unit can adopt digital regulation resistance and the resistance pressure-dividing network composition of 8-12 position according to control precision.
In embodiment two, cause when ambient temperature changes that the temperature of Electroabsorption Modulated Laser (temperature of laser housing) is corresponding to change, the position in crosspoint is caused to produce drift but crossover point voltage Vx when remaining unchanged, the bucking voltage amount that in the present invention, voltage sets unit provides according to temperature compensation module adjusts current reference voltage, feedback control unit carries out FEEDBACK CONTROL makes the difference of crossover point voltage and described current reference voltage in preset range, crossover point voltage is revised, compensate the position excursion in crosspoint, thus make the position stability in crosspoint.
As shown in Figure 3, in embodiment two, the structure of feedback control unit is identical with embodiment one.Temperature compensation module comprises temperature detecting unit and voltage control unit.
Temperature detection and converting unit are used for the voltage V corresponding with the temperature of Electroabsorption Modulated Laser
tbe sent to voltage control unit.The voltage V that temperature detection and converting unit export
tchange with the variations in temperature of laser housing.
Voltage control unit is used for the voltage V exported according to temperature detection and converting unit
tcalculate the temperature of Electroabsorption Modulated Laser, and according to the temperature computation of the Electroabsorption Modulated Laser bucking voltage amount relative to described initial reference voltage.
Voltage control unit according to following formula according to V
tcalculate the case temperature Tc of Electroabsorption Modulated Laser:
Tc=T1+（V
T –V1）/a
Wherein, T1 is the parameter representing ambient temperature, and can manually arrange (being such as set to 25 degree), V1 is the magnitude of voltage that temperature detection and converting unit calculate when laser temperature is T1.A is the intrinsic fixed coefficient of temperature detection and converting unit.
The backoff algorithm used in voltage control unit is expressed from the next:
Vx=-ξ(Tc-T
0)+Vx@T
0
Wherein, ξ is penalty coefficient (this coefficient can use experience value), T
0for representing the parameter of the case temperature of the laser be positioned under normal temperature, can manually arrange, Vx@T
0represent that the temperature when laser is T
0time the value of voltage Vx.
The temperature variant side-play amount of Vx voltage is: Δ Vx=Vx-Vx@T
0=-ξ (Tc-T
0).In order to compensate for laser variations in temperature is on the impact of cross-point locations, the voltage that need compensate is Δ Vx.
When using digital regulation resistance in voltage sets unit, voltage control unit exports integer value N according to following formula and controls this digital regulation resistance as bucking voltage amount:
N=ΔVx/K=-ξ [Tc-T
0]/K
Wherein, K is the stepping coefficient of digital regulation resistance.
As shown in Figure 3, cause when ambient temperature changes that the temperature of Electroabsorption Modulated Laser (temperature of laser housing) is corresponding to change, cause the position in crosspoint to produce drift but crossover point voltage Vx when remaining unchanged, temperature detection and converting unit export the voltage V corresponding with the temperature of Electroabsorption Modulated Laser by detecting
tvoltage control unit calculates Tc, and calculate the adjusted value N of digital regulation resistance in voltage sets unit further, voltage sets unit carries out corresponding Voltage Cortrol, voltage control crossover point voltage Vx after the adjustment that feedback control unit exports according to voltage sets unit, make the change of the compensating for variations laser temperature of crossover point voltage Vx, thus stablize cross-point locations.
Illustrate at the corresponding relation carrying out laser temperature Tc and crossover point voltage Vx in temperature compensation procedure in crossing point temperature compensated curve as shown in Figure 4.The relation that the change of crossover point voltage in the present invention affects cross-point locations as shown in Figure 5.Known by Fig. 4 and Fig. 5, adopt the present invention laser can be stabilized within 1% from the cross point of eye pattern variable quantity in-5 degree ~ 80 degree of temperature ranges.
The method improving stability of cross point of eye pattern comprises: setting reference voltage; The crossover point voltage corresponding to the crosspoint of Electroabsorption Modulated Laser output eye pattern carries out FEEDBACK CONTROL makes the difference of crossover point voltage and described reference voltage in preset range.
During setting reference voltage, be initial reference voltage by voltage sets corresponding for the crosspoint settling position of expectation.
To the crossover point voltage of Electroabsorption Modulated Laser carry out FEEDBACK CONTROL make the difference of crossover point voltage and described reference voltage in preset range time, concrete, determine the bucking voltage amount relative to described initial reference voltage according to the temperature detecting Electroabsorption Modulated Laser; Current reference voltage is adjusted according to described bucking voltage amount.
Determine to comprise relative to the bucking voltage measurer body of described initial reference voltage according to detecting the temperature of Electroabsorption Modulated Laser: determine the voltage corresponding with the temperature of Electroabsorption Modulated Laser, according to described voltage calculate Electroabsorption Modulated Laser temperature and according to the temperature computation of the Electroabsorption Modulated Laser bucking voltage amount relative to described initial reference voltage.
Implementation procedure concrete in this method is corresponding identical in describing with said apparatus.
The present invention, by stablizing cross-point locations, can improve eye pattern allowance further, reduces the error rate.
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (4)
1. improve a control device for stability of cross point of eye pattern, it is characterized in that,
Described control device comprises crosspoint control module; Described crosspoint control module comprises voltage sets unit and feedback control unit;
Described voltage sets unit, for setting reference voltage;
Described voltage sets unit is initial reference voltage for the voltage sets that the crosspoint settling position by expectation is corresponding;
Described feedback control unit, carries out FEEDBACK CONTROL for the crossover point voltage corresponding to the crosspoint of Electroabsorption Modulated Laser output eye pattern and makes the difference of crossover point voltage and described reference voltage in preset range;
Described control device also comprises temperature compensation module;
Described temperature compensation module, for determining bucking voltage amount relative to described initial reference voltage according to detecting the temperature of Electroabsorption Modulated Laser and input to described voltage sets unit;
Described voltage sets unit, for adjusting current reference voltage according to described bucking voltage amount;
Described temperature compensation module comprises temperature detecting unit and voltage control unit;
Described temperature detection and converting unit, for being sent to described voltage control unit by the voltage corresponding with the temperature of Electroabsorption Modulated Laser;
Described voltage control unit, for calculate according to described voltage Electroabsorption Modulated Laser temperature and according to the temperature computation of the Electroabsorption Modulated Laser bucking voltage amount relative to described initial reference voltage.
2. control device as claimed in claim 1, is characterized in that,
Described feedback control unit comprises the error controller, controllable current source, the current-to-voltage converter that are connected successively; Also comprise the feedback circuit be connected between controllable current source and the reverse input end of error controller; The positive input of error controller is used for the reference voltage of input voltage setup unit output.
3. control device as claimed in claim 1, is characterized in that,
The Electroabsorption Modulated Laser of described Electroabsorption Modulated Laser to be speed be 40G or more than 40G.
4. improve a method for stability of cross point of eye pattern, it is characterized in that,
Setting reference voltage;
Be initial reference voltage by voltage sets corresponding for the crosspoint settling position of expectation;
The crossover point voltage corresponding to the crosspoint of Electroabsorption Modulated Laser output eye pattern carries out FEEDBACK CONTROL makes the difference of crossover point voltage and described reference voltage in preset range;
The bucking voltage amount relative to described initial reference voltage is determined according to the temperature detecting Electroabsorption Modulated Laser; Current reference voltage is adjusted according to described bucking voltage amount;
Determine to comprise relative to the bucking voltage measurer body of described initial reference voltage according to detecting the temperature of Electroabsorption Modulated Laser: determine the voltage corresponding with the temperature of Electroabsorption Modulated Laser, according to described voltage calculate Electroabsorption Modulated Laser temperature and according to the temperature computation of the Electroabsorption Modulated Laser bucking voltage amount relative to described initial reference voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110031364.2A CN102143105B (en) | 2011-01-28 | 2011-01-28 | Control device and method for improving stability of cross point of eye pattern |
| PCT/CN2011/079664 WO2012100543A1 (en) | 2011-01-28 | 2011-09-15 | Control device and method for improving stability of cross point of eye pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110031364.2A CN102143105B (en) | 2011-01-28 | 2011-01-28 | Control device and method for improving stability of cross point of eye pattern |
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| CN102143105A CN102143105A (en) | 2011-08-03 |
| CN102143105B true CN102143105B (en) | 2015-03-25 |
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| CN102143105B (en) * | 2011-01-28 | 2015-03-25 | 中兴通讯股份有限公司 | Control device and method for improving stability of cross point of eye pattern |
| CN103516471B (en) * | 2012-06-26 | 2017-11-03 | 中兴通讯股份有限公司 | Without number of bit errors according to method of reseptance and device |
| CN106330295B (en) * | 2015-07-08 | 2019-10-22 | 南京中兴软件有限责任公司 | A kind of electric eye adjustment method and device |
| CN106253975A (en) * | 2016-08-11 | 2016-12-21 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN107425924B (en) * | 2017-06-23 | 2023-03-14 | 厦门亿芯源半导体科技有限公司 | Eye diagram cross point adjusting circuit |
| CN109683652A (en) * | 2018-12-21 | 2019-04-26 | 惠州Tcl移动通信有限公司 | WIFI voltage control method, device, mobile terminal and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145064A (en) * | 2007-06-25 | 2008-03-19 | 中兴通讯股份有限公司 | Load level switching circuit |
| CN101630975A (en) * | 2008-07-16 | 2010-01-20 | 华为技术有限公司 | Method and device for controlling bias voltage of photomodulator |
| CN101800605A (en) * | 2010-03-04 | 2010-08-11 | 中兴通讯股份有限公司 | Optical receiver, control device thereof and control method thereof |
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| US6288581B1 (en) * | 2001-01-05 | 2001-09-11 | Pericom Semiconductor Corp. | Low-voltage differential-signalling output buffer with pre-emphasis |
| CN102143105B (en) * | 2011-01-28 | 2015-03-25 | 中兴通讯股份有限公司 | Control device and method for improving stability of cross point of eye pattern |
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- 2011-01-28 CN CN201110031364.2A patent/CN102143105B/en active Active
- 2011-09-15 WO PCT/CN2011/079664 patent/WO2012100543A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145064A (en) * | 2007-06-25 | 2008-03-19 | 中兴通讯股份有限公司 | Load level switching circuit |
| CN101630975A (en) * | 2008-07-16 | 2010-01-20 | 华为技术有限公司 | Method and device for controlling bias voltage of photomodulator |
| CN101800605A (en) * | 2010-03-04 | 2010-08-11 | 中兴通讯股份有限公司 | Optical receiver, control device thereof and control method thereof |
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| CN102143105A (en) | 2011-08-03 |
| WO2012100543A1 (en) | 2012-08-02 |
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