CN104618024B - Anonymous microwave signal long-distance optical fiber phase-stable transmission device eliminating coherent Rayleigh noise - Google Patents
Anonymous microwave signal long-distance optical fiber phase-stable transmission device eliminating coherent Rayleigh noise Download PDFInfo
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- CN104618024B CN104618024B CN201510002002.9A CN201510002002A CN104618024B CN 104618024 B CN104618024 B CN 104618024B CN 201510002002 A CN201510002002 A CN 201510002002A CN 104618024 B CN104618024 B CN 104618024B
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Abstract
The invention discloses an anonymous microwave signal long-distance optical fiber phase-stable transmission device eliminating coherent Rayleigh noise. The device comprises a far end, a local end and optical fibers, wherein the far end is connected with the local end through the optical fibers. Microwave signals received by the far end are loaded onto light carriers through an external MZM (Mach-Zehnder modulator), three light carriers with different wavelengths respectively carry the microwave signals passing the primary optical fiber, the secondary optical fiber and the tertiary optical fiber, and the coherent Rayleigh noise is avoided. A phase-locked loop based on an electric phase shifter is used for dynamically adjusting the phase difference between the microwave signals passing the primary optical fiber and the tertiary optical fiber, and phase fluctuation for controlling dynamic voltage compensation optical fiber transmission introduction is generated to achieve phase-stable transmission. The device is stable in operation and has a fine phase-stable effect in long-time measurement.
Description
Technical field
The present invention relates to passive microwave light sublink is stably transmitted the device of microwave signal phase, specifically a kind of elimination
The anonymous microwave signal remote stabilized fiber phase transmitting device of coherent rayleigh noise.
Background technology
The eighties in last century that the stabilized fiber of microwave signal is transferred from mutually rises and is widely studied, the earliest for main equipment
Or the clock signal (radio frequency or microwave signal) in experimental provision distributes with Tong Bu, have been applied at present deep space scientific research,
The many aspects such as basic physics measurement and multistatic radar technology.Optical fiber is owing to having low-loss, electromagnetism interference, light weight valency
The advantage such as excellent, becomes the perfect medium of transfer clock signal.But, optical fiber is due to temperature and vibration sensing so that Jing Guoguang
There is phase perturbation in the clock signal after fine transmission, needs phase stabilizing device that phase perturbation is carried out dynamic compensation.Through to existing
Technical literature is retrieved, and the common feature of the phase stabilizing device the most reported for work is, clock signal is all to be generated by local side
Fiber-optic transfer is to far-end (being defined as active microwave photon link), and feedback controller is often positioned in local side and mends real-time dynamicly
Repay the phase perturbation that fiber-optic transfer causes.But in passive location and light-carried wireless link, generally require remote antenna
The microwave signal received is transferred to local side (being defined as passive microwave light sublink) by optical fiber link, feedback is controlled simultaneously
Device processed is placed on the phase perturbation that local side dynamic compensation fiber-optic transfer causes, now steady be applicable to active microwave photon link
Phase device is the most feasible.A kind of microwave signal steady phase transmission plan for passive microwave light sublink is proposed before us,
The phase contrast of the microwave signal of a locking optical fiber of experience and three optical fiber produces control voltage and eliminates phase jitter.Shortcoming exists
Optical signals in three optical fiber of experience experiences the optical signal of twice optical fiber by Bragg grating reflection so that co-wavelength
Optical signal reverse transfer in same optical fiber result in coherent rayleigh noise, limit the precision of steady phase and the length of optical fiber
Degree.
Summary of the invention
In view of the above deficiency of prior art, it is an object of the invention to provide a kind of anonymity eliminating coherent rayleigh noise micro-
Ripple signal remote stabilized fiber phase transmitting device, utilize the light carrier of three different wave lengths carry respectively optical fiber of experience,
Twice optical fiber and the microwave signal of three optical fiber, thus eliminate coherent rayleigh noise.Utilize phaselocked loop to lock and experience once light
Phase contrast between fibre and the microwave signal of three optical fiber is fixed value, produces control voltage simultaneously and drives the phase shifter to move
State compensated optical fiber transmits the phase jitter caused.This device working stability, has in measuring for a long time and preferably surely imitates mutually
Really.
It is an object of the invention to analyze and scheme proposes and realizes based on following:
A kind of anonymous microwave signal remote stabilized fiber phase transmitting device eliminating coherent rayleigh noise, it is characterised in that
Phase stabilizing device is made up of far-end, optical fiber 5 and local side three part, and far-end is connected by optical fiber 5 with local side；Far-end receives frequency
Rate is the anonymous microwave signal of ω, and by MZM intensity modulator 3 external modulation on light carrier, the centre wavelength of light carrier is
The central wavelength lambda of laser instrument 11, Polarization Controller 2 controls to enter the polarization state of the light carrier of MZM intensity modulator 3；MZM intensity
The output light of manipulator 3 enters optical fiber 5 by wavelength division multiplexer 4, and through the guiding of circulator 6, erbium-doped fiber amplifier 7
Amplify and after the wavelength selection of wavelength division multiplexer 8, recovered by the opto-electronic conversion of photodetector 9 and be carried in light carrier λ1
On microwave signal (optical fiber)；The microwave signal of fiber-optic transfer of experience is through the out of band signal of electricity band filter 10
Filter and after the signal with low noise electric amplifier 11 amplifies, be divided into three equal parts: send into phaselocked loop based on the electricity phase shifter for first part
The A mouth of 12；Exporting as system after second part of phase shift by the electric phase shifter 13, the amount of phase shift of electricity phase shifter 13 is by phaselocked loop 12
The control Control of Voltage produced；The 3rd part of centre wavelength being carried in laser instrument 14 generation by MZM intensity modulator 16 is λ2
Light carrier on, Polarization Controller 15 is for controlling to enter the polarization state of the light carrier of MZM intensity modulator 16；MZM intensity is adjusted
The output light of device 16 processed enters optical fiber 5 by circulator 6, passes through photodetector after the wavelength of wavelength division multiplexer 4 selects
The opto-electronic conversion of 17 recovers and is carried in light carrier λ2On microwave signal (secondary optical fiber)；The microwave of experience secondary fiber-optic transfer
Signal is added by MZM intensity modulator 22 after photodetector 17, electricity band filter 18 and low noise electric amplifier 19
Being loaded in the centre wavelength produced by laser instrument 20 is λ3Light carrier on, Polarization Controller 21 regulation enter MZM intensity modulator
The polarization state of the light carrier of 22；The output light of MZM intensity modulator 22 enters light 5 by wavelength division multiplexer 4, and through circulator
After the wavelength of guiding, the amplification of erbium-doped fiber amplifier 7 and the wavelength division multiplexer 8 of 6 selects, by the light of photodetector 23
Electricity conversion recovers and is carried in light carrier λ3On microwave signal (three optical fiber)；The microwave signal warp of three fiber-optic transfer of experience
The B mouth of phaselocked loop 12 is entered after crossing electricity band filter 24 and low noise electric amplifier 25.
So, remote antenna receives the microwave signal that angular frequency is ω, is represented by: Eremote(t)=Acos (ω t).
Transfering to other localities on light carrier by MZM intensity modulator 3, the centre wavelength of the light carrier i.e. centre wavelength of laser instrument 1 is λ1。MZM
The output optical signal of intensity modulator 3 transmits to local side through optical fiber 5, by recovering after the opto-electronic conversion of photodetector
The microwave signal (optical fiber) being carried on light carrier.This microwave signal is divided into three parts: 1) shifting in phaselocked loop 12
E is become after phase deviceone-path(t)=Acos (ω t-φp-θ0+θc(t)), wherein φpIt is that the phase place that fiber-optic transfer causes is trembled
Dynamic, θ0-θcT () is the phase-shift phase introduced the phase shifter；2) it is θ by phase-shift phase0+θcExport as system after the phase shifter of (t),
System output signal expression formula is Eoutput(t)=Acos (ω t-φp-θ0-θc(t))；3) being modulated at another centre wavelength is
λ2Light carrier on be back to far-end (secondary optical fiber), at far-end by after light electro-optic conversion, being modulated at centre wavelength is λ3Light
Local side (three optical fiber) it is resent on carrier wave.The microwave recovering three optical fiber of experience by opto-electronic conversion at local side is believed
Number, after the phase shifter in phaselocked loop 12, become Etriple-path(t)=Acos (ω t-3 φp-θ0-θc(t)).In phaselocked loop 12
Pi controller 104 for Eone-path(t) and Etriple-pathPhase contrast proportional integral between (t), and produce phase
Amount of phase shift θ controlling voltage controlled phase shifter answeredc(t).Work as Eone-path(t) and Etriple-pathT the phase contrast between () is zero
Time, proportional integrator output reaches stable state, and phaselocked loop reaches lock-out state.Now there are cos (2 φp+2θc(t))=0, i.e.Then the expression formula of final output signal is Eoutput(t)=Acos (ω t-φp+ π/4), its phase place is normal
Number, the phase jitter that fiber-optic transfer introduces is eliminated.
Accompanying drawing illustrates:
Fig. 1 is the phase stabilizing device structure chart of the present invention；
Fig. 2 is phaselocked loop 12 cut-away view based on the electricity phase shifter；
Fig. 3 is the fiber lengths steady phase effect when being 25km and 40km；
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the phase stabilizing device structure chart of the present invention, as it can be seen, phase stabilizing device is by far-end, optical fiber 5 and local side three
Being grouped into, far-end is connected by optical fiber 5 with local side.Far-end receives the anonymous microwave signal that frequency is ω, by MZM intensity
Manipulator 3 external modulation is on light carrier, and the centre wavelength of light carrier is the central wavelength lambda of laser instrument 11, Polarization Controller 2 is controlled
System enters the polarization state of the light carrier of MZM intensity modulator 3.The output light of MZM intensity modulator 3 is entered by wavelength division multiplexer 4
Enter optical fiber 5, and after the wavelength of guiding, the amplification of erbium-doped fiber amplifier 7 and the wavelength division multiplexer 8 of circulator 6 selects,
Recovered by the opto-electronic conversion of photodetector 9 and be carried in light carrier λ1On microwave signal (optical fiber).Experience is once
The signal that the out of band signal of the microwave signal process electricity band filter 10 of fiber-optic transfer filters with low noise electric amplifier 11 is put
Three equal parts it are divided into after great.First part of A mouth sending into phaselocked loop 12 based on the electricity phase shifter, second part by the electricity phase shifter 13
Export as system after phase shift, the control Control of Voltage that the amount of phase shift of electricity phase shifter 13 is produced by phaselocked loop 12.3rd part is passed through
It is λ that MZM intensity modulator 16 is carried in the centre wavelength of laser instrument 14 generation2Light carrier on, polarization controller 15 is used for controlling
System enters the polarization state of the light carrier of MZM intensity modulator 16.The output light of MZM intensity modulator 16 is entered by circulator 6
Optical fiber 5, is recovered by the opto-electronic conversion of photodetector 17 after the wavelength of wavelength division multiplexer 4 selects and is carried in light carrier
λ2On microwave signal (secondary optical fiber).The microwave signal of experience secondary fiber-optic transfer is through electricity band filter 18 and low noise
Being carried in, by MZM intensity modulator 22, the centre wavelength produced by laser instrument 20 after electric amplifier 19 is λ3Light carrier on,
Polarization Controller 22 regulation enters the polarization state of the light carrier of MZM intensity modulator 22.The output light of MZM intensity modulator 22 leads to
Cross circulator 4 and enter optical fiber 5.And through guiding, the amplification of erbium-doped fiber amplifier 7 and the wavelength division multiplexer 8 of circulator 6
After wavelength selects, recovered by the opto-electronic conversion of photodetector 23 and be carried in light carrier λ3On microwave signal (three light
Fine).The microwave signal of three fiber-optic transfer of experience enters phase-locked after electricity band filter 24 and low noise electric amplifier 25
The B mouth of ring 12.
Fig. 2 is phaselocked loop 12 cut-away view based on the electricity phase shifter, as it can be seen, by electricity phase shifter 101, electricity phase shifter
102, frequency mixer 103, proportional plus integral control integrator 104, adder 105 and subtractor 106 form.Frequency mixer 103 obtains letter
Number Eone-path(t) and Etriple-pathPhase contrast (i.e. 2 φ between (t)p+2θc(t)) information, output voltage is proportional to cos (2
φp+2θc(t)).Pi controller 104 carries out proportional integral to the output voltage of frequency mixer, and its output voltage is Vc(t)。
V0For fixed reference potential, adder 105 produces voltage V0+VcT (), is used for driving the electricity phase shifter 101 so that it is produce θ0+θc(t)
Phase-shift phase.Subtractor 106 produces voltage V0-VcT (), is used for driving electricity phase shifter 102 and electricity phase shifter 13, makes the two produce
θ0-θcThe phase-shift phase of (t).Phaselocked loop 12 dynamically regulates Eone-path(t) and Etriple-pathT the phase contrast between (), only works as cos
(2φp+2θc(t))=0, phase contrast 2 φ the most therebetweenp+2θcT, during ()=pi/2, phaselocked loop just reaches lock-out state.
Fig. 3 is steady phase effect figure, as shown is the microwave signal of 2.45GHz from far-end through 25km and 40km fiber-optic transfer
To local side, in the case of not using and use feedback compensation two kinds, carry out the result of test in two hours respectively.25km
(40km) during optical fiber, when not using feedback compensation, output signal is gradually increased with the phase contrast of input signal and has 30.6ps
(41.6ps) rms jitter；And when using feedback compensation, output signal is stable at 40ps with the phase contrast of input signal
(30ps), near, rms jitter is decreased to 1.66ps (1.71ps), and steady phase effect is obvious.
The invention has the beneficial effects as follows:
1. this device is be applicable to passive microwave light sublink, and the signal that antenna receives transmits to local side from far-end.Adopt
By the method automatically controlled, specifically proportional plus integral control, it is achieved the dynamic compensation of phase jitter.This device working stability,
The most steady phase effect is had in measuring for a long time.
2. this device uses three wavelength to eliminate coherent rayleigh noise, improves the precision of steady phase.
Claims (6)
1. the anonymous microwave signal remote stabilized fiber phase transmitting device eliminating coherent rayleigh noise, it is characterised in that steady
Phase device is made up of far-end, optical fiber (5) and local side three part, and far-end is connected by optical fiber (5) with local side；Far-end receives
Frequency is the anonymous microwave signal of ω, by MZM intensity modulator (3) external modulation on light carrier, and the center of light carrier
Wavelength is the central wavelength lambda of laser instrument 11, the first Polarization Controller (2) controls to enter the light of a MZM intensity modulator (3)
The polarization state of carrier wave；The output light of the oneth MZM intensity modulator (3) enters optical fiber (5) by first wave division multiplexer (4), and
After the wavelength of guiding, the amplification of erbium-doped fiber amplifier (7) and the second wavelength division multiplexer (8) through circulator (6) selects,
Recovered by the opto-electronic conversion of photodetector (9) and be carried in light carrier λ1On first time optical fiber microwave signal；Experience the
The microwave signal of fiber-optic transfer filters and low noise electric amplifier (11) through the out of band signal of electricity band filter (10)
Signal amplify after be divided into three equal parts: first part of A mouth sending into phaselocked loop (12) based on the electricity phase shifter；Second part by electricity
Export as system after the phase shift of phase shifter (13), the control voltage that the amount of phase shift of electricity phase shifter (13) is produced by phaselocked loop (12)
Control；3rd part is carried in, by the 2nd MZM intensity modulator (16), the centre wavelength that laser instrument (14) produces is λ2Light carry
On ripple, the second Polarization Controller (15) is used for the polarization state controlling to enter the light carrier of MZM intensity modulator (16)；2nd MZM
The output light of intensity modulator (16) enters optical fiber (5) by circulator (6), and the wavelength through first wave division multiplexer (4) selects
Recovered by the opto-electronic conversion of photodetector (17) after selecting and be carried in light carrier λ2On second time optical fiber microwave signal；Warp
The microwave signal going through second time fiber-optic transfer is put through the second photodetector (17), electricity band filter (18) and low noise acoustic-electric
It is λ that big device (19) is carried in, by the 3rd MZM intensity modulator (22), the centre wavelength produced by laser instrument (20) afterwards3Light carry
On ripple, the 3rd Polarization Controller (21) regulation enters the polarization state of the light carrier of the 3rd MZM intensity modulator (22)；3rd MZM
The output light of intensity modulator (22) enters optical fiber (5) by first wave division multiplexer (4), and guiding through circulator (6),
After the amplification of erbium-doped fiber amplifier (7) and the wavelength of the second wavelength division multiplexer (8) select, by photodetector (23)
Opto-electronic conversion recovers and is carried in light carrier λ3On third time optical fiber microwave signal；The microwave letter of experience third time fiber-optic transfer
Number after electricity band filter (24) and low noise electric amplifier (25), enter the B mouth of phaselocked loop (12).
The remote stabilized fiber of anonymous microwave signal of elimination coherent rayleigh noise the most according to claim 1 transmits dress mutually
Put, it is characterised in that described phaselocked loop (12) based on the electricity phase shifter is by the first electricity phase shifter (101), the second electricity phase shifter
(102), frequency mixer (103), proportional plus integral control integrator (104), adder and subtractor composition；Frequency mixer (103) obtains
Phase information between signal；Proportional plus integral control integrator (104) carries out proportional integral, addition to the output voltage of frequency mixer
Device produces voltage for driving the first electricity phase shifter (101)；Subtractor produce voltage for drive second electricity the phase shifter (102) and
Electricity phase shifter (13) makes the two phase-shift phase produced.
A kind of remote stabilized fiber of anonymous microwave signal eliminating coherent rayleigh noise transmits mutually
Device, it is characterised in that described phaselocked loop (12) based on the electricity phase shifter can use other phase delay device, and microwave signal is prolonged
Line substitutes late.
A kind of remote stabilized fiber of anonymous microwave signal eliminating coherent rayleigh noise transmits mutually
Device, it is characterised in that the mode of directly modulation can be used to substitute and by MZM external modulator, microwave signal is loaded into light carrier
On.
A kind of remote stabilized fiber of anonymous microwave signal eliminating coherent rayleigh noise transmits mutually
Device, it is characterised in that utilize the light carrier of three different wave lengths carry respectively experience optical fiber, for the second time optical fiber for the first time and
The microwave signal of optical fiber for the third time, thus avoid coherent rayleigh noise.
A kind of remote stabilized fiber of anonymous microwave signal eliminating coherent rayleigh noise transmits mutually
Device, it is characterised in that wavelength shifter can be used to substitute by photodetector (17), electricity band filter (18), low noise
Electric amplifier (19), laser instrument (20), the 3rd Polarization Controller (21), the 3rd MZM intensity modulator (22) constitutes photoelectric interferometric
Long transducer, or use acousto-optic wavelength shifter.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917042B (en) * | 2015-06-19 | 2018-01-12 | 中国科学院上海光学精密机械研究所 | Bidirectional optical amplifier applied to the low noise sound pitch symmetry of optical fiber time-frequency transmission |
| CN105915287A (en) * | 2016-07-05 | 2016-08-31 | 桂林创研科技有限公司 | Optical fiber transmission system |
| CN107682087B (en) * | 2017-09-22 | 2019-05-07 | 西南交通大学 | A kind of steady phase transmission method of microwave optical fiber for eliminating local oscillator leakage in passive phase correction |
| CN110333391B (en) * | 2019-04-08 | 2021-10-01 | 中国科学技术大学 | Microwave phase measurement system capable of correcting and measuring cable phase drift on line |
| CN113037424B (en) * | 2021-03-12 | 2023-05-09 | 广东科学技术职业学院 | Channel selection method and device for elastic optical network |
| CN113098622B (en) * | 2021-03-14 | 2022-01-28 | 北京邮电大学 | Frequency transfer device based on bidirectional phase jitter compensation of optical frequency comb |
| CN113676262B (en) * | 2021-07-14 | 2022-07-26 | 北京航空航天大学 | Signal remote transmission phase stabilization system based on injection locking photoelectric oscillator |
| CN114938245A (en) * | 2022-05-18 | 2022-08-23 | 浙江大学 | Distributed multi-antenna cooperative phase stabilization method and device for future broadband wireless communication |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1119119B1 (en) * | 2000-01-20 | 2003-11-05 | Nippon Telegraph and Telephone Corporation | Local generator with PLL for phase synchronization of clock signal with bits in optical pulse stream |
| CN203014803U (en) * | 2012-12-07 | 2013-06-19 | 展讯通信（上海）有限公司 | Mobile terminal, base-band chip and radio frequency chip |
| CN103209026A (en) * | 2013-02-28 | 2013-07-17 | 西南交通大学 | Full-duplex multi-service-convergence radio-over-fiber transmission system |
| CN103532627A (en) * | 2013-09-16 | 2014-01-22 | 西南交通大学 | Phase stabilizing device for long-distance optical-fiber transmission of unknown microwave signals |
| CN103701529A (en) * | 2013-12-09 | 2014-04-02 | 北京邮电大学 | Signal time delay stable transmission method and system of broadband |
| CN203800941U (en) * | 2014-04-28 | 2014-08-27 | 中国电子科技集团公司第三十四研究所 | Optical fiber phase compensator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7336939B2 (en) * | 2003-05-21 | 2008-02-26 | Broadcom Corporation | Integrated tracking filters for direct conversion and low-IF single conversion broadband filters |
| JP5092827B2 (en) * | 2007-03-29 | 2012-12-05 | 富士通株式会社 | Optical DQPSK receiver and abnormality detection control method |
-
2015
- 2015-01-04 CN CN201510002002.9A patent/CN104618024B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1119119B1 (en) * | 2000-01-20 | 2003-11-05 | Nippon Telegraph and Telephone Corporation | Local generator with PLL for phase synchronization of clock signal with bits in optical pulse stream |
| CN203014803U (en) * | 2012-12-07 | 2013-06-19 | 展讯通信（上海）有限公司 | Mobile terminal, base-band chip and radio frequency chip |
| CN103209026A (en) * | 2013-02-28 | 2013-07-17 | 西南交通大学 | Full-duplex multi-service-convergence radio-over-fiber transmission system |
| CN103532627A (en) * | 2013-09-16 | 2014-01-22 | 西南交通大学 | Phase stabilizing device for long-distance optical-fiber transmission of unknown microwave signals |
| CN103701529A (en) * | 2013-12-09 | 2014-04-02 | 北京邮电大学 | Signal time delay stable transmission method and system of broadband |
| CN203800941U (en) * | 2014-04-28 | 2014-08-27 | 中国电子科技集团公司第三十四研究所 | Optical fiber phase compensator |
Non-Patent Citations (2)
| Title |
|---|
| Enhanced phase stability in passive analog photonic links with coherent Rayleigh noise reduction;Zonglei Li;《OPTICS EXPRESS》;20150224;第23卷(第5期);5744-5748 * |
| 光纤稳相微波频率传输中相干瑞利噪声的影响与抑制;常乐 等;《光学学报》;20120531;第32卷(第5期);0506004 * |
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