CN107682085A - A kind of fibre-optical dispersion electronic compensating and flatness compensation circuit and method - Google Patents
A kind of fibre-optical dispersion electronic compensating and flatness compensation circuit and method Download PDFInfo
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- CN107682085A CN107682085A CN201710992271.3A CN201710992271A CN107682085A CN 107682085 A CN107682085 A CN 107682085A CN 201710992271 A CN201710992271 A CN 201710992271A CN 107682085 A CN107682085 A CN 107682085A
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- 239000000835 fiber Substances 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 description 5
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25751—Optical arrangements for CATV or video distribution
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/25133—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion including a lumped electrical or optical dispersion compensator
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Abstract
The invention provides a kind of fibre-optical dispersion electronic compensating and flatness compensation circuit and method,It can be directed to the dispersion caused by optical fiber in different distance transmission of different fiber optic wavelengths and compensate,Control simple and convenient,It is very flexible,User's service efficiency is high,The change of the signal flatness caused by dispersion compensation is can also compensate for simultaneously,Improve the flatness of 1550nm optical transmitter signals,Improve the performance of product,Including power amplifier,Impedance transformer,At least two-stage electronic compensating circuit,Electronic compensating circuit sequence connects,The output end of the input connection impedance transformer of first order electronic compensating circuit,The input port of the output end connection 1550nm lasers of afterbody electronic compensating circuit,Electronic compensating circuit includes the electric capacity being connected in series,Inductance and varactor,First order electronic compensating circuit and second level electronic compensating circuit respectively further comprise the resistance and inductance being connected in parallel,Also include pre-compensation circuit,Control circuit,MCU.
Description
Technical field
The present invention relates to fibre-optical dispersion pre-compensation techniques field, and in particular to one kind is applied to cable television series light device
The fibre-optical dispersion and flatness compensation circuit and method of the middle straight tunable light emission machines of 1550nm.
Background technology
1550nm Transmission system technologies are that cable TV network enters community/family to more service interaction platforms and optical fiber
（FTTH/FTTP）The important foundation of development." light entering and copper back ", " network fiber ", " allow loss it is extremely low, frequency band is extremely wide, to electromagnetism
Interference is immune, and cheap optical fiber replaces copper cable ", these are into the common recognition of number people big absolutely, the light transmitted in a fiber
The different frequency composition of signal or different mode components are propagated at different rates, necessarily lead to signal after reaching certain distance
Distortion, this phenomenon are referred to as the dispersion of optical fiber, and the straight dispersion compensation for adjusting 1550nm optical senders to transmit over long distances is a technology
Problem.
As notification number be CN105515669A Chinese invention patent in disclose a kind of fibre-optical dispersion pre-compensation circuit, its
The middle method for having recorded the fibre-optical dispersion pre-compensation circuit formed using inductance and varactor, but it can not be adapted to not
Dispersion caused by optical fiber in same distance transmission, when it does not account for dispersion compensation under radiofrequency signal difference transmission range, radio frequency
The flatness of signal can change with the volume change of varactor, and ineffective in actual applications and user is not using
It is convenient, lead to not the demand for adapting to heterogeneous networks development in use, make the degradation of product.
The content of the invention
In view of the above-mentioned problems, the invention provides a kind of fibre-optical dispersion electronic compensating and flatness compensation circuit, it can
For different fiber optic wavelengths, dispersion caused by optical fiber compensates in different distance transmission, and control is simple and convenient, very flexibly,
User's service efficiency is high, while can also compensate for the change of the signal flatness caused by dispersion compensation, improves 1550nm light
The flatness of transmitter signal, improve the performance of product, in addition present invention also offers a kind of fibre-optical dispersion electronic compensating and
Flatness compensation method.
Its technical scheme is such：A kind of fibre-optical dispersion electronic compensating and flatness compensation circuit, it is characterised in that bag
Include：
Power amplifier, for amplifying the radiofrequency signal of input；
Impedance transformer, the output end of the input connection power amplifier of the impedance transformer, for penetrating after amplification
Frequency signal carries out impedance conversion；
Electronic compensating circuit, the electronic compensating circuit is at least provided with two-stage, the electronic compensating circuit sequence connection, electricity described in the first order
The input of compensation circuit connects the output end of the impedance transformer, the output end connection of electronic compensating circuit described in afterbody
The input port of 1550nm lasers, the electronic compensating circuit include electric capacity, inductance and the varactor being connected in series, passed through
The voltage for changing the varactor changes the group delay of radiofrequency signal, caused dispersion in being transmitted for compensated optical fiber, institute
State first order electronic compensating circuit and the second level electronic compensating circuit respectively further comprise the resistance and inductance being connected in parallel, for pair
Caused by the voltage change of the varactor varactor capacitance change caused by radiofrequency signal flatness change into
Row compensation；
Pre-compensation circuit, the pre-compensation circuit connect the input of the impedance transformer, and the pre-compensation circuit includes string
Join the electric capacity and varactor of connection, pre-compensated for for the flatness change to radiofrequency signal in optical fiber transmitting procedure；
Control circuit, the control circuit include DA converters, and the DA converters connect the pre-compensation circuit respectively, electricity is mended
Repay circuit, for export regulation voltage come adjust the pre-compensation circuit, electronic compensating circuit varactor voltage.
MCU, the MCU connections control circuit, the regulation that the control circuit is adjusted for output digit signals are electric
Pressure.
Further, the impedance transformer is the impedance transformer being wound on enamel-covered wire in high frequency ferrite core
Z1。
Further, the pre-compensation circuit includes connecting the electric capacity C8 of the power amplifier output, the electric capacity
It is grounded after C8 connection transformation diodes C5.
Further, 75 ohm of radiofrequency signal after the impedance transformer exports power amplification passes through the impedance
Converter is transformed into 25 ohm of radiofrequency signal.
Further, the electronic compensating circuit includes first order electronic compensating circuit and second level electronic compensating circuit, the first order
Electronic compensating circuit includes the other end point for connecting the coupled capacitor C1, the coupled capacitor C1 of the output end of the impedance transformer
Do not connect the inductance L1 being connected in parallel and resistance R1 one end, the inductance L1 and the resistance R1 other end connect respectively
Be grounded after varactor V1, and the inductance L1 and the resistance R1 other end be connected in series in respectively electric capacity C2,
It is grounded after inductance L2, varactor V2, the inductance L1 and the resistance R1 other end also distinguish second level electronic compensating electricity
The coupled capacitor C4 on road one end, the other end of the coupled capacitor C4 connect the inductance L5's being connected in parallel and resistance R2 respectively
One end, the inductance L5 and the resistance R2 other end are grounded after connecting varactor V3 respectively, and the inductance L5 and
It is grounded after electric capacity C5 that the other end of the resistance R2 is connected in series in respectively, inductance L5, varactor V4, the inductance
L5 and the resistance R2 other end connect 1550nm lasers after being also respectively connected with electric capacity C9.
Further, control circuit include DA converter DA1, DA converter DA2, DA converter DA3, DA converters DA4,
DA converters DA5, the DA converters DA1 delivery outlet are connected to the input port of amplifier 1, the delivery outlet connection of amplifier 1
Electric capacity C8 and varactor V4 are connected after resistance R3 respectively, the delivery outlet of the DA converters DA2 is connected to the defeated of amplifier 2
Entrance, inductance L2 and varactor V2, the DA converters DA3 are connected respectively after the delivery outlet connection resistance R4 of amplifier 2
Delivery outlet be connected to the input port of amplifier 3, inductance L4, the inductance L3 that the delivery outlet of amplifier 3 is connected in series in, inductance
L4, inductance L3 are grounded after connecting electric capacity C3 respectively, inductance the L3 other end connection varactor V1, the DA converters DA4
Delivery outlet be connected to the input port of amplifier 4, connect inductance L6 and transfiguration respectively after the delivery outlet connection resistance R5 of amplifier 4
Diode V4, the DA converters DA5 delivery outlet are connected to the input port of amplifier 5, the delivery outlet connection series connection of amplifier 5
Inductance L8, the inductance L7 of connection, inductance L8, inductance L7 are grounded after connecting electric capacity C6 respectively, inductance L7 other end connection transfiguration
Diode V3.
A kind of fibre-optical dispersion electronic compensating and flatness compensation method, using above-mentioned fibre-optical dispersion electronic compensating and flat
Spend compensation circuit and carry out fibre-optical dispersion electronic compensating and flatness compensation.
Further, the distance for optical fiber transmission is less than 5 kilometers of situation, by MCU set that optical fiber transmits away from
From MCU control control circuit outputs adjust voltage, the voltage of the varactor of pre-compensation circuit are adjusted, to radiofrequency signal
Flatness is pre-compensated for, while the voltage for adjusting the varactor of electronic compensating circuit carrys out the dispersion of compensated optical fiber.
Further, the distance for optical fiber transmission is more than 5 kilometers of situation, by MCU set optical fiber transmission away from
From MCU control control circuit output regulation voltages, the voltage for adjusting the varactor of electronic compensating circuit carrys out the color of compensated optical fiber
Dissipate, the parallel resistance and inductance accessed by electronic compensating circuit changes to compensate radiofrequency signal flatness.
The fibre-optical dispersion electronic compensating and flatness compensation circuit of the present invention, user set the length of optical fiber transmission by MCU
Spend to use the capacitance of MCU control varactors, inductance and varactor produce group delay and be used for offsetting optical fiber transmission
Dispersion in distance, easily realize fibre-optical dispersion in being transmitted to different distance and compensate, control is simple and convenient, and user uses
Efficiency high, very flexibly, improve the application in different fiber distance transmitting procedures；For in conventional method, due to optical fiber
The distance of transmission is different, and the voltage of regulation voltage to the varactor of control circuit output also changes, when inductance is constant,
The electric capacity of varactor changes, and for radiofrequency signal flatness also with changing, the present invention utilizes resistance and inductance simultaneously
Join circuit to compensate the change of varactor capacitance, have the function that signal flatness compensates, substantially increase 1550nm light
The flatness of transmitter broadband transmission, improve the performance of product；The inductance in the present invention, electric capacity, resistance, impedance become simultaneously
Parallel operation, AD and amplifier are all matured products, and market maintenance is big, cheap, and delivery cycle is short, and cost is very low, application
The competitiveness of product in market is greatly improved on the straight tunable light emission machines of 1550nm, can extensive use；
The fibre-optical dispersion electronic compensating of the present invention and flatness compensation method, operation is flexible, easy to use, solves traditional fiber
The flatness requirement of the technical indicator and radio signal transmission in transmitting over long distances can not be reached in dispersion compensation.
Brief description of the drawings
Fig. 1 is the fibre-optical dispersion electronic compensating of the present invention and the system block diagram of flatness compensation circuit；
Fig. 2 is the fibre-optical dispersion electronic compensating of the present invention and the circuit theory diagrams of flatness compensation circuit.
Embodiment
Accompanying drawing in implementing below in conjunction with the present invention, the technical scheme in implementing to the present invention carry out clear, complete
Description.Obviously described embodiment is only the part of the embodiment of the present invention, and the embodiment being not all of.Based on this hair
Embodiment in bright, those of skill in the art are not having the creative all embodiments for designing and being obtained, are belonging to this
The protection domain of invention.
See Fig. 1, Fig. 2, fibre-optical dispersion electronic compensating of the invention and flatness compensation circuit directly dim applied to 1550nm
Emitter, including：Power amplifier 1, for amplifying the radiofrequency signal of input；Impedance transformer 2, the input of impedance transformer 2
The output end of end connection power amplifier 1, for carrying out impedance conversion, in the present embodiment, impedance to the radiofrequency signal after amplification
Converter is the impedance transformer Z1 being wound on enamel-covered wire in high frequency ferrite core, and impedance transformer 1 is defeated by power amplification
75 ohm of radiofrequency signal after going out is transformed into 25 ohm of radiofrequency signal by impedance transformer 1, under this impedance, during compensation
Most preferably；
Electronic compensating circuit includes first order electronic compensating circuit 3 and second level electronic compensating circuit 4, first order electronic compensating circuit 3 and
Two level electronic compensating circuit 4 is linked in sequence, the output end of the input connection impedance transformer 2 of first order electronic compensating circuit 3, and second
The input port of the output end connection 1550nm lasers 4 of level electronic compensating circuit 4, specifically, first order electronic compensating circuit includes
The coupled capacitor C1 of the output end of impedance transformer is connected, the coupled capacitor C1 other end connects the inductance L1 being connected in parallel respectively
With resistance R1 one end, the inductance L1 and resistance R1 other end is grounded after connecting varactor V1 respectively, and inductance L1 and
It is grounded after electric capacity C2 that the resistance R1 other end is connected in series in respectively, inductance L2, varactor V2, inductance L1 and electricity
The resistance R1 other end also distinguishes the coupled capacitor C4 of second level electronic compensating circuit one end, coupled capacitor C4 other end difference
The inductance L5 and resistance R2 one end that connection is connected in parallel, inductance L5 and resistance the R2 other end connect varactor respectively
It is grounded after V3, and electric capacity C5, inductance L5, the varactor V4 that inductance L5 and resistance the R2 other end are connected in series in respectively
After be grounded, the inductance L5 and resistance R2 other end connects 1550nm lasers, different 1550n m after being also respectively connected with electric capacity C9
Laser wavelength needs different inductance values, is reached in the present invention with inductance and varactor combination to different wave length
1550n m lasers carry out the effect of electronic compensating, by the electric capacity, inductance and varactor being connected in series, are become by changing
The voltage for holding diode changes the group delay of radiofrequency signal, caused dispersion in being transmitted for compensated optical fiber, the electricity being connected in parallel
Resistance and inductance, for the flat of radiofrequency signal caused by varactor capacitance change caused by the voltage change to varactor
Smooth degree change compensates,；
Also include pre-compensation circuit 5, pre-compensation circuit 5 includes the electric capacity C8 of connection power amplifier output, electric capacity C8 connections
It is grounded after transformation diode C5, is pre-compensated for for the flatness change to radiofrequency signal in optical fiber transmitting procedure；
Also include control circuit 6, control circuit 6 includes DA converters, and DA converters connect pre-compensation circuit, electronic compensating electricity respectively
Road, for export regulation voltage adjust pre-compensation circuit, electronic compensating circuit varactor voltage, specific control electricity
Road includes DA converter DA1, DA converter DA2, DA converter DA3, DA converter DA4, DA converter DA5, DA converters DA1
Delivery outlet be connected to the input port of amplifier 1, connect electric capacity C8 and transfiguration respectively after the delivery outlet connection resistance R3 of amplifier 1
Diode V4, DA converter DA2 delivery outlet is connected to the input port of amplifier 2, after the delivery outlet connection resistance R4 of amplifier 2
The delivery outlet for connecting inductance L2 and varactor V2, DA converter DA3 respectively is connected to the input port of amplifier 3, amplifier 3
The delivery outlet inductance L4, the inductance L3 that are connected in series in, inductance L4, inductance L3 be grounded after connecting electric capacity C3 respectively, inductance L3
Other end connection varactor V1, DA converter DA4 delivery outlet be connected to the input port of amplifier 4, amplifier 4 it is defeated
Inductance L6 is connected respectively after outlet connection resistance R5 and varactor V4, DA converter DA5 delivery outlet is connected to amplifier 5
Input port, inductance L8, the inductance L7 that the delivery outlet of amplifier 5 is connected in series in, inductance L8, inductance L7 connect electric capacity respectively
It is grounded after C6, inductance L7 other end connection varactor V3；
Also include MCU, MCU connection control circuits, for the regulation voltage of output digit signals adjustment control circuit, MCU can be with
Using the control of common chip microcontroller DA converters, those skilled in the art easily realizes, will not be repeated here.
The distance transmitted below for different optical fiber, illustrate the fibre-optical dispersion electronic compensating and flatness of the present invention
The operation principle of compensation circuit.
The situation that distance for optical fiber transmission is less than 5 kilometers, it is only necessary to mended in advance to the flatness of radiofrequency signal
Repay, set the data signal of the distance of optical fiber transmission to be sent to D/A converter DA1 processing by MCU, the data signal handled becomes
Change regulation voltage output into, regulation voltage output is connected to the input port of amplifier 1, the amplification output regulation voltage connection of amplifier 1
Onto R3, the pre-compensation circuit of C8 and V5 compositions is adjusted, the flatness of radiofrequency signal is pre-compensated for, MCU turns to DA simultaneously
Parallel operation DA2 sends data signal, and D/A converter DA2 is adjusted simultaneously by the digital signal conversion handled into regulation voltage output
Voltage output is connected to the input port of amplifier 2, and the regulation voltage of the amplification output of amplifier 2 is connected on R4, regulation electric capacity C2, electricity
Varactor V2 magnitude of voltage carrys out the color of compensated optical fiber in the first order electronic compensating circuit that sense L2, varactor V2 are formed
Dissipate, also simultaneously by the digital signal conversion handled into regulation voltage output, regulation voltage output is connected to puts D/A converter DA4
The input port of big device 4, the regulation voltage of the amplification output of amplifier 4 are connected in R5 inputs, R5 output regulation voltage-regulation electric capacity
Varactor V4 magnitude of voltage carrys out compensated optical fiber in the second level electronic compensating circuit that C5, inductance L6, varactor V4 are formed
Dispersion, with first order electronic compensating circuit and second level electronic compensating circuit come change the group delay of signal reach offset optical fiber pass
Caused different dispersions in defeated, the situation for being less than 5 kilometers in the distance of optical fiber transmission need not be because of dispersion compensation and again to penetrating
The flatness of frequency signal compensates.
The situation that distance for optical fiber transmission is more than 5 kilometers, need to carry out flatness benefit after dispersion compensation is carried out
Repay, set the data signal of the distance of optical fiber transmission to be sent to D/A converter DA3 processing by MCU, the data signal handled becomes
Change regulation voltage output into, regulation voltage output is connected to the input port of amplifier 3, and the regulation voltage that amplifier 3 exports passes through electricity
Feel L4, electric capacity C3, inductance L3 circuit output, the regulation voltage of output is sent to inductance L1 and the transfiguration of first order electronic compensating circuit
On diode V1, for changing the dispersion that V1 capacitance carrys out compensated optical fiber, MCU simultaneously by the digital signal conversion handled into
Voltage output is adjusted, regulation voltage output is connected to the input port of amplifier 5, and the amplification output regulation voltage of amplifier 5 passes through inductance
L8, electric capacity C6, inductance L7 circuit output, the voltage of output are sent to the inductance L5 and varactor of second level electronic compensating circuit
V3, the capacitance for changing V3 carry out the dispersion of compensated optical fiber, and first order electronic compensating circuit and second level electronic compensating circuit are used for changing
The group delay of signal reaches the dispersion offset in optical fiber transmission；
When carrying out dispersion compensation, V1 varactors, V2 varactors and second level electricity in first order electronic compensating circuit
V3 varactors, V4 varactors voltage in compensation circuit can also change, and voltage swing can change the pole of transfiguration two
The capacity of pipe, the impedance that signal transmits can be caused also to change, the flatness in radio signal transmission can also become
Change, the Quality Down for transmitting signal, the inductance L1 and resistance R1 being connected in parallel in the first order electronic compensating circuit in the present invention
With being connected in parallel inductance L5 and resistance R2 in the electronic compensating circuit of the second level, the flatness in radio signal transmission is compensated,
When varactor V1, V2 electric capacity and varactor V3, V4 capacitance variations, the impedance of the signal of transmission is substantially without becoming
Change, be basically unchanged the flatness in radio signal transmission, meet the requirement in radio signal transmission.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, that described in above-described embodiment and specification is the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these change and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Thing defines.
Claims (9)
1. a kind of fibre-optical dispersion electronic compensating and flatness compensation circuit, it is characterised in that including：
Power amplifier, for amplifying the radiofrequency signal of input；
Impedance transformer, the output end of the input connection power amplifier of the impedance transformer, for penetrating after amplification
Frequency signal carries out impedance conversion；
Electronic compensating circuit, the electronic compensating circuit is at least provided with two-stage, the electronic compensating circuit sequence connection, electricity described in the first order
The input of compensation circuit connects the output end of the impedance transformer, the output end connection of electronic compensating circuit described in afterbody
1550nm laser input mouths, the electronic compensating circuit includes electric capacity, inductance and the varactor being connected in series, by changing
The voltage for becoming the varactor changes the group delay of radiofrequency signal, and caused dispersion in being transmitted for compensated optical fiber is described
First order electronic compensating circuit and the second level electronic compensating circuit respectively further comprise the resistance and inductance being connected in parallel, for institute
The flatness change of radiofrequency signal caused by varactor capacitance change caused by stating the voltage change of varactor is carried out
Compensation；
Pre-compensation circuit, the pre-compensation circuit connect the input of the impedance transformer, and the pre-compensation circuit includes string
Join the electric capacity and varactor of connection, pre-compensated for for the flatness change to radiofrequency signal in optical fiber transmitting procedure；
Control circuit, the control circuit include DA converters, and the DA converters connect the pre-compensation circuit respectively, electricity is mended
Repay circuit, for export regulation voltage come adjust the pre-compensation circuit, electronic compensating circuit varactor voltage；
MCU, the MCU connections control circuit, the regulation voltage for the output digit signals adjustment control circuit.
2. a kind of fibre-optical dispersion electronic compensating according to claim 1 and flatness compensation circuit, it is characterised in that：It is described
Impedance transformer is the impedance transformer being wound on enamel-covered wire in high frequency ferrite core.
3. a kind of fibre-optical dispersion electronic compensating according to claim 1 and flatness compensation circuit, it is characterised in that：It is described
Pre-compensation circuit includes connecting the electric capacity C8 of the power amplifier output, and the electric capacity C8 connections transformation diode C5 is followed by
Ground.
4. a kind of fibre-optical dispersion electronic compensating according to claim 3 and flatness compensation circuit, it is characterised in that：It is described
Electronic compensating circuit includes first order electronic compensating circuit and second level electronic compensating circuit, and first order electronic compensating circuit is included described in connection
The coupled capacitor C1 of the output end of impedance transformer, the other end of the coupled capacitor C1 connect the inductance L1 being connected in parallel respectively
With resistance R1 one end, the inductance L1 and the resistance R1 other end is grounded after connecting varactor V1 respectively, and
After electric capacity C2 that the inductance L1 and the resistance R1 other end are connected in series in respectively, inductance L2, varactor V2
Ground connection, the inductance L1 and the resistance R1 other end also distinguish the coupled capacitor C4 of second level electronic compensating circuit one end,
The other end of the coupled capacitor C4 connects the inductance L5 being connected in parallel and resistance R2 one end respectively, the inductance L5 and described
The resistance R2 other end is grounded after connecting varactor V3 respectively, and the inductance L5 and the resistance R2 other end point
It is grounded after the electric capacity C5 that is not connected in series in, inductance L5, varactor V4, the inductance L5 and the resistance R2's is another
End connects 1550nm lasers after being also respectively connected with electric capacity C9.
5. a kind of fibre-optical dispersion electronic compensating according to claim 4 and flatness compensation circuit, it is characterised in that：Control
Circuit includes DA converter DA1, DA converter DA2, DA converter DA3, DA converter DA4, DA converters DA5, the DA changes
Parallel operation DA1 delivery outlet is connected to the input port of amplifier 1, and electric capacity is connected respectively after the delivery outlet connection resistance R3 of amplifier 1
C8 and varactor V4, the DA converters DA2 delivery outlet are connected to the input port of amplifier 2, the delivery outlet of amplifier 2
Inductance L2 and varactor V2 are connected respectively after connection resistance R4, and the delivery outlet of the DA converters DA3 is connected to amplifier 3
Input port, inductance L4, the inductance L3 that the delivery outlet of amplifier 3 is connected in series in, inductance L4, inductance L3 connect electric capacity respectively
It is grounded after C3, inductance L3 other end connection varactor V1, the delivery outlet of the DA converters DA4 is connected to amplifier 4
Input port, connect inductance L6 and varactor V4, the DA converters respectively after the delivery outlet connection resistance R5 of amplifier 4
DA5 delivery outlet is connected to the input port of amplifier 5, inductance L8, the inductance L7 that the delivery outlet of amplifier 5 is connected in series in,
Inductance L8, inductance L7 are grounded after connecting electric capacity C6 respectively, inductance L7 other end connection varactor V3.
6. a kind of fibre-optical dispersion electronic compensating according to claim 1 and flatness compensation circuit, it is characterised in that：It is described
75 ohm of radiofrequency signal after impedance transformer exports power amplification is transformed into 25 ohm by the impedance transformer
Radiofrequency signal.
7. a kind of fibre-optical dispersion electronic compensating and flatness compensation method, it is characterised in that：Using described in claim 1
1550nm fibre-optical dispersions electronic compensating and flatness compensation circuit carry out fibre-optical dispersion electronic compensating and flatness compensation.
8. a kind of fibre-optical dispersion electronic compensating according to claim 7 and flatness compensation method, it is characterised in that：For
The situation that the distance of optical fiber transmission is less than 5 kilometers, the distance of optical fiber transmission, MCU control control circuit outputs are set by MCU
Voltage is adjusted, the voltage of the varactor of pre-compensation circuit is adjusted, the flatness of radiofrequency signal is pre-compensated for, adjusted simultaneously
The voltage of the varactor for compensation circuit of economizing on electricity carrys out the dispersion of compensated optical fiber.
9. a kind of fibre-optical dispersion electronic compensating according to claim 7 and flatness compensation method, it is characterised in that：For
The situation that the distance of optical fiber transmission is more than 5 kilometers, the distance of optical fiber transmission, MCU control control circuit outputs are set by MCU
Voltage is adjusted, the voltage for adjusting the varactor of electronic compensating circuit carrys out the dispersion of compensated optical fiber, is accessed by electronic compensating circuit
Parallel resistance and inductance come compensate radiofrequency signal flatness change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710992271.3A CN107682085B (en) | 2017-10-23 | 2017-10-23 | Optical fiber dispersion electric compensation and flatness compensation circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710992271.3A CN107682085B (en) | 2017-10-23 | 2017-10-23 | Optical fiber dispersion electric compensation and flatness compensation circuit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107682085A true CN107682085A (en) | 2018-02-09 |
| CN107682085B CN107682085B (en) | 2024-02-20 |
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ID=61139796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710992271.3A Active CN107682085B (en) | 2017-10-23 | 2017-10-23 | Optical fiber dispersion electric compensation and flatness compensation circuit and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111770296A (en) * | 2020-06-19 | 2020-10-13 | 平湖新纳通信技术股份有限公司 | Flatness leveling method for cable television optical receiver |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694383A (en) * | 2004-03-19 | 2005-11-09 | 昂科公司 | Direct regulation laser optical transfer system |
| US20090245309A1 (en) * | 2008-03-31 | 2009-10-01 | General Instrument Corporation | Dispersion Compensating Varactor Circuit |
| US20100316392A1 (en) * | 2009-06-15 | 2010-12-16 | Fujitsu Limited | Tunable dispersion compensation apparatus, optical reception module and method |
| US20160028490A1 (en) * | 2014-07-25 | 2016-01-28 | Arris Enterprises, Inc. | Directly modulated laser with dispersion compensation |
| CN105515669A (en) * | 2015-12-08 | 2016-04-20 | 四川九州电子科技股份有限公司 | Optical fiber dispersion pre-compensation circuit |
| CN207753721U (en) * | 2017-10-23 | 2018-08-21 | 无锡路通视信网络股份有限公司 | A kind of fibre-optical dispersion electronic compensating and flatness compensation circuit |
-
2017
- 2017-10-23 CN CN201710992271.3A patent/CN107682085B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694383A (en) * | 2004-03-19 | 2005-11-09 | 昂科公司 | Direct regulation laser optical transfer system |
| US20050271396A1 (en) * | 2004-03-19 | 2005-12-08 | John Iannelli | Directly modulated laser optical transmission system |
| US20090245309A1 (en) * | 2008-03-31 | 2009-10-01 | General Instrument Corporation | Dispersion Compensating Varactor Circuit |
| US20100316392A1 (en) * | 2009-06-15 | 2010-12-16 | Fujitsu Limited | Tunable dispersion compensation apparatus, optical reception module and method |
| US20160028490A1 (en) * | 2014-07-25 | 2016-01-28 | Arris Enterprises, Inc. | Directly modulated laser with dispersion compensation |
| CN105515669A (en) * | 2015-12-08 | 2016-04-20 | 四川九州电子科技股份有限公司 | Optical fiber dispersion pre-compensation circuit |
| CN207753721U (en) * | 2017-10-23 | 2018-08-21 | 无锡路通视信网络股份有限公司 | A kind of fibre-optical dispersion electronic compensating and flatness compensation circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111770296A (en) * | 2020-06-19 | 2020-10-13 | 平湖新纳通信技术股份有限公司 | Flatness leveling method for cable television optical receiver |
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| CN107682085B (en) | 2024-02-20 |
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