CN106299977B - The method of two frequency multiplication photoelectric oscillators based on phase-modulation - Google Patents
The method of two frequency multiplication photoelectric oscillators based on phase-modulation Download PDFInfo
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- CN106299977B CN106299977B CN201610846181.9A CN201610846181A CN106299977B CN 106299977 B CN106299977 B CN 106299977B CN 201610846181 A CN201610846181 A CN 201610846181A CN 106299977 B CN106299977 B CN 106299977B
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- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
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- H01S1/02—Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range solid
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Abstract
The method of the method for two frequency multiplication photoelectric oscillators based on phase-modulation the invention discloses a kind of tunable two frequency multiplication photoelectric oscillator based on phase-modulation.The invention is related to microwave technical field and technical field of photo communication, is mainly used in generation microwave local signal.The method is as shown in the picture, including laser source, Polarization Controller, circulator, polarization beam apparatus, phase-modulator, photo-coupler, the polarizer, standard single-mode fiber, photodetector, tunable bandpass filters, electric amplifier and electric phase shifter.The characteristic that phase-modulator has positive modulation, do not modulate reversely.The optical signal exported from circulator is divided into the equal two paths of signals of power by photo-coupler.Phase-modulator composition optical-electronic oscillator is wherein fed back to all the way obtains fundamental frequency signal.Another way inhibits light carrier to obtain two frequency multiplication microwave signals by adjusting Polarization Controller.In conjunction with tunable bandpass filters, two frequency multiplication microwave signals of frequency-tunable can be obtained.The optical-electronic oscillator frequency tuning range is larger, and phase noise is lower, can simultaneously obtain base frequency oscillation signal and two frequency multiplication microwave signals.Program structure is simple, flexible adjustment, is not influenced by bias drift in conventional strength modulation scheme.
Description
Technical field
The present invention relates to technical field of photo communication and microwave technical field, relate generally in optical communication technique based on phase tune
The method of two frequency multiplication photoelectric oscillators (OEO) of system.
Background technique
Continuous development with microwave photon technology in fields such as aerospace, radar, wireless communication and electronic countermeasures,
High frequency, wideband adjustable microwave signal generation technique have important application value.With traditional microwave signal generation technology
It compares, the photonics generation technology of microwave signal has the advantages that high frequency, Low phase noise, wideband adjustable and not by electromagnetic interference,
And relatively easy, compatible with other photosystems, the remote covering power of system structure is good, transmission capacity is big.
With military and civilian applications development need, it is desirable that future microwave system have big bandwidth, Larger Dynamic range with
And the features such as highly sensitive.Requirement especially in military radar and electronic countermeasure field to microwave system also can be increasingly
It is high.Meanwhile as the raising of message complexity, information content are more and more abundant, thus to the performance of information system propose it is higher,
Tightened up requirement.Wherein, high-frequency, high spectral purity are generated, with the low microwave local oscillation letter of wide tunable and phase noise
Number seem most important.
OEO is a kind of oscillator that microwave local oscillation is generated using Photonics Technology, can directly generate microwave, millimeter wave
Section microwave local oscillation has potential application in fields such as radar, electronic warfare, precise measurements.Compared with traditional microwave oscillator,
OEO has lower phase noise, and mutually makes an uproar and does not significantly increase with the raising of frequency of oscillation, is microwave and millimeter wave, very
To the potential selection scheme of THz wave Low phase noise signal source.OEO can provide two kinds of electricity, light input modes for information system,
It can be with various electronic systems and optic communication, Microwave photonics system compatible.
In recent years, extensive concern has been obtained using the method that OEO generates microwave signal and frequency-doubled signal processing.Photoelectricity
Oscillator is usually a regenerative feedback loop being made of light source, intensity modulator, filter and amplifier.Due to intensity modulated
The bias drift problem of device had been emerged in large numbers many utilization light polarization modulators, Polarization Controller and the polarizer in recent years and had been equivalent to by force
Spend the OEO scheme of modulator.But the microwave and millimeter wave signal frequency range that these OEO schemes generate is smaller, and system is complex,
It involves great expense.
Summary of the invention
In order to solve the technical problem in the presence of background technology, the invention proposes one kind is combined based on phase-modulator
The tunable two frequencys multiplication OEO method of Sagnac (Sagnac) ring.Optical-electronic oscillator is realized using tunable bandpass filters
Frequency selection, obtains the fundamental frequency microwave signal of Low phase noise.Additionally by simple adjustment Polarization Controller suppressed carrier, to generate
Two frequency multiplication microwave signals of the Low phase noise of frequency-tunable.
The technical solution adopted by the present invention to solve the technical problems is: described device include laser source, Polarization Controller,
Circulator, polarization beam apparatus, phase-modulator, photo-coupler, the polarizer, photodetector, tunable bandpass filters, electromigration
Phase device, electric amplifier and standard single-mode fiber；Two output ends of polarization beam apparatus respectively with phase-modulator input with it is defeated
Outlet is connected, and constitutes a Sagnac ring；The output end of laser source is connected with Polarization Controller, the Polarization Controller other end
1 port of circulator is connected, 2 port of circulator connects polarization beam apparatus input terminal；3 port of circulator is divided into function by photo-coupler
The equal two paths of signals of rate.It is wherein sequentially connected Polarization Controller, the polarizer, single mode optical fiber, photodetector all the way, it is electrically amplified
Device, tunable bandpass filters, electric phase shifter；The output end of electric phase shifter is input to the prevention at radio-frequency port of phase-modulator, thus
Constitute OEO.Another way is sequentially connected another Polarization Controller, the polarizer, photodetector.The output of every road photodetector
End can connect spectrum analyzer and carry out electric signal test.
The present invention at work the following steps are included:
(1) issuing wavelength from laser source isLight wave be injected into Polarization Controller；
(2) Polarization Controller is adjusted, polarization beam apparatus is made to export the equal optical signal of two-way power, a curb is square clockwise
It is transferred to phase-modulator to by polarization maintaining optical fibre, another way passes through polarization maintaining optical fibre in the counterclockwise direction and enters phase-modulator；
(3) optical signal transmitted clockwise will obtain phase-modulation, due to the inherent characteristic of modulator, along
Counterclockwise the optical signal of transmission is not modulated, and phase modulated signal and light carrier form palarization multiplexing light, from annular
The output of 3 port of device；
(4) optical signal by the output of 3 port of circulator is divided into the equal two paths of signals of power by photo-coupler.Per all the way
Respectively after Polarization Controller, the polarizer, phase modulated signal and light carrier interfere with a polarization direction, form intensity tune
Signal processed.Phase-modulator, Sagnac ring and the polarizer are equivalent to intensity modulator, and by adjusting Polarization Controller, this is equivalent
The operating point of intensity modulator can arbitrarily change；
(5) wherein optical signal is by Polarization Control all the way, and the polarizer exports the intensity-modulated signal of orthogonal points, by optical fiber
Enter photodetector afterwards, obtained electric signal feeds back to the radio-frequency head of phase-modulator after electrically amplified, filter, phase shift
Mouthful, to constitute OEO loop.Electrical filter realizes frequency-selecting function, and electric amplifier makes link obtain constant gain, meets oscillation
Fundamental frequency signal is generated after condition.
(6) another way optical signal exports the intensity-modulated signal of smallest point by Polarization Control, the polarizer, and light carrier obtains
Inhibit, obtains two frequency multiplication microwave signals by photodetector beat frequency.
(7) by changing the centre frequency of tunable electric bandpass filter, the frequency of fundamental frequency signal changes, while two
Frequency multiplication microwave signal also changes correspondingly.
The invention proposes the devices of tunable two frequencys multiplication OEO a kind of.The program using phase-modulator, Sagnac ring and
The polarizer realizes the OEO of frequency-tunable in conjunction with tunable electrical filter, and by another way Polarization Control, having obtained can
Two frequency multiplication microwave signals of tuning.Present device is simple, has very strong practical operability.
Due to using phase-modulator, the present invention does not need external dc bias voltage, eliminates due to biasing point drift
The problem that shipper pole comes.
This programme does not need optical filter, and photoelectricity vibration may be implemented by the voltage that simple adjustment is applied to bandpass filter
The tunability of device is swung, and tuning range is larger, so that the two frequency multiplication microwave signals generated have tunability and tuning range
It is larger.
Detailed description of the invention
Fig. 1 is that the present invention is based on the schematic diagrams of phase-modulator and the tunable two frequencys multiplication OEO of Sagnac ring；Fig. 2 is light
The electricity spectrum overall diagram and thumbnail for the fundamental frequency signal that electric explorer 1 exports, (a-d) be respectively frequency of oscillation be 5GHz,
Electric spectrogram when 10GHz, 15GHz, 20GHz；Fig. 3 is the electricity spectrum overall diagram and breviary of two defeated frequency-doubled signals of electric amplifier
Figure, (a-d) be respectively frequency of oscillation be 5GHz, 10GHz, 15GHz, 20GHz when electric spectrogram；Fig. 4 is fundamental frequency signal and two
The phase noise of frequency-doubled signal compares figure.
Specific embodiment
Elaborate with reference to the accompanying drawing to the embodiment of the present invention: the present embodiment before being with technical solution of the present invention
It puts and is implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to down
The embodiment stated:
Fig. 1 is that the present invention is based on the schematic diagrams of phase-modulator and the tunable two frequencys multiplication OEO of Sagnac ring.Such as Fig. 1
Shown, in the present embodiment, device includes: laser source, Polarization Controller 1, circulator, polarization beam apparatus, phase-modulator, polarization
Controller 2, the polarizer 1, Polarization Controller 3, the polarizer 2, photo-coupler, standard single-mode fiber, tunable bandpass filters, electricity
Phase shifter, electric amplifier, photodetector 1, photodetector 2.
In this example, the specific implementation step of method is:
Step 1: light source generates the continuous light carrier that operation wavelength is 1552.16nm, inputs after Polarization Controller 1
1 port of circulator, 2 port output optical signal of circulator enter polarization beam apparatus.Polarization Controller 1 is adjusted, polarization beam apparatus is made
Two-way Output optical power it is equal.
Step 2: the optical signal that polarization beam apparatus a port comes out enters phase-modulator by polarization maintaining optical fibre forward direction,
Phase-modulation is obtained, the optical signal of another port output inversely enters phase-modulator by polarization maintaining optical fibre, do not obtain effectively
Modulation, is still a light carrier.The optical signal and reversed light carrier of forward direction modulation are combined into palarization multiplexing at polarization beam apparatus
Light is exported by 3 port of circulator.
Step 3: the two ways of optical signals exported from photo-coupler, wherein entering the polarizer after light polarization modulator 2 all the way
1, the optical signal of two polarization states synthesizes a branch of polarised light at the polarizer, then passes through the standard single-mode fiber of 1.98km long.
1 conversion gain 600V/W of photodetector, obtained electric signal successively pass through 30dB electric amplifier, tunable bandpass filters,
Then electric phase shifter feeds back to the prevention at radio-frequency port of phase-modulator, constitute optical-electronic oscillator loop.
Step 4: the bandwidth of tunable bandpass filters is about 50MHz, adjusts the voltage being added on filter, tuning
It is respectively that 5GHz, 10GHz, 15GHz, 20GHz are tested that range has selected centre frequency in 3-20GHz, in experiment.It adjusts
Polarization Controller 2, make the polarizer 1 export orthogonal points modulated signal, Fig. 2 (a-d) be respectively 5GHz, 10GHz, 15GHz,
The electric spectrogram of 20GHz fundamental frequency signal, it can be seen that obtained fundamental frequency signal harmonics restraint than be respectively 47dB, 44dB, 36dB,
34dB。
Step 5: the another way optical signal exported from photo-coupler enters the polarizer 2 after light polarization modulator 3.Pass through
Adjusting Polarization Controller 3 may be implemented to inhibit light carrier to the greatest extent.Two frequencys multiplication are obtained after 2 beat frequency of photodetector
Microwave signal.Fig. 3 (a-d) is respectively the two frequency-doubled signal electricity spectrograms of 10GHz, 20GHz, 30GHz, 40GHz, it can be seen that two times
The harmonics restraint of frequency signal is than being respectively 38dB, 40dB, 40dB, 45dB.
Step 6: Fig. 4 (a-d) be respectively 5GHz, 10GHz, 15GHz, 20GHz fundamental frequency signal and corresponding 10GHz,
The comparison of the phase noise of bis- frequency-doubled signal of 20GHz, 30GHz, 40GHz, theoretically two frequency-doubled signal phase noises can decay
6dB, as can be seen from the figure both experimental results difference is about 6dB.
To sum up, the present invention realizes the OEO of frequency-tunable since phase-modulator and Sagnac ring is utilized.Structure
Simply it is easily achieved, it is cheap, it is not influenced by electronic bottleneck.Two frequency multiplication microwaves of fundamental frequency signal and generation that OEO is generated
The tuning range of signal is larger, and phase noise is very low.Further, since using phase modulation technique, additional direct current is not needed
Biasing circuit is eliminated due to the various problems of direct current biasing point drift bring, and system stability is good.
In short, embodiments described above is only the embodiment of the present invention, not it is only used for limiting guarantor of the invention
Protect range, it is noted that for those skilled in the art, can be in present disclosure
Increase tuning range, the fundamental frequency signal frequency range that optical-electronic oscillator generates is not limited to 3-20GHz, two frequency-doubled signal frequency ranges
6-40GHz are not limited to, if the photodetector three dB bandwidth used is bigger, tuning range can be bigger.These equivalent variations and
Replacement and the adjustment of frequency range also should be regarded as the scope of protection of the invention.
Claims (5)
1. a kind of method of tunable two frequency multiplication photoelectric oscillator based on phase-modulation, including laser source, Polarization Controller, ring
Shape device, polarization beam apparatus, phase-modulator, photo-coupler, the polarizer, photodetector, electric amplifier, tunable electrofiltration wave
Device, electric phase shifter and standard single-mode fiber, it is characterised in that: circulator exports polarization beam splitting on the emitting light path of light source
The palarization multiplexing light synthesized at device, is divided into the equal two paths of signals of power through photo-coupler, wherein being sequentially connected polarization control all the way
Device processed, the polarizer, single mode optical fiber, photodetector, electric amplifier, tunable electrical filter, electric phase shifter, electric phase shifter it is defeated
Outlet is input to the prevention at radio-frequency port of phase-modulator, constitutes optical-electronic oscillator feedback link；Another way is sequentially connected another partially
Shake controller, the polarizer, and photodetector constitutes two frequency multiplication links of optical-electronic oscillator；
Two output ports of the polarization beam apparatus are separately connected the input and output side of phase-modulator, constitute Sagnac
Sagnac ring；
It is positive in the Sagnac ring to obtain phase-modulation by the optical signal of modulator, believe reverses through the light of phase-modulator
It number is not modulated；Phase modulated signal synthesizes at polarization beam apparatus with unmodulated light carrier；
The Sagnac ring combination polarizer can be equivalent to an intensity modulator, and can be by adjusting the polarization before the polarizer
Controller changes the operating point of intensity modulator；
In the feedback link of the optical-electronic oscillator, by adjusting Polarization Controller, equivalent orthogonal points modulated signal, light are obtained
Electrical resistivity survey obtains pure fundamental frequency signal after surveying；
In two frequency multiplication links of the optical-electronic oscillator, by adjusting Polarization Controller, equivalent smallest point modulated signal is obtained,
Light carrier is inhibited, and two pure frequency-doubled signals are obtained after photodetection.
2. the method for tunable two frequency multiplication photoelectric oscillator according to claim 1 based on phase-modulation, feature exist
In by adjusting electrical filter band connection frequency, changeable fundamental frequency, and then two frequency multiplication frequencies change correspondingly.
3. the method for tunable two frequency multiplication photoelectric oscillator according to claim 1 based on phase-modulation, feature exist
In: the modulator is phase-modulator, does not need additional direct current biasing control circuit.
4. the method for tunable two frequency multiplication photoelectric oscillator according to claim 1 based on phase-modulation, feature exist
In: the Polarization Controller combination polarizer is utilized, is allowed to be equivalent to orthogonal points modulation.
5. the method for tunable two frequency multiplication photoelectric oscillator according to claim 1 based on phase-modulation, feature exist
In: the Polarization Controller combination polarizer is utilized, is allowed to be equivalent to smallest point modulation, inhibits to carry by simple adjustment Polarization Controller
Wave realizes two frequencys multiplication.
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| CN107123919B (en) * | 2017-06-26 | 2019-02-22 | 湖南工学院 | Optical signal processing method and the optical-electronic oscillator directly demodulated based on phase-modulation- |
| CN109450551B (en) * | 2018-11-30 | 2020-10-02 | 北京邮电大学 | Multi-octave phase shifting method and device |
| CN109669189A (en) * | 2019-01-19 | 2019-04-23 | 南京合太光电科技有限公司 | Wide range, the high-precision absolute distance meter device being switched fast based on OEO |
| CN110350983B (en) * | 2019-08-13 | 2022-05-24 | 西北工业大学 | Microwave photon self-interference signal eliminating device based on Sagnac loop and adjusting method |
| CN111614405A (en) * | 2020-05-25 | 2020-09-01 | 济南浪潮高新科技投资发展有限公司 | Image rejection mixer based on double parallel phase modulators |
| CN114002787B (en) * | 2021-11-04 | 2022-11-11 | 中国人民解放军国防科技大学 | Optical fiber coherent array phase control system based on probe light |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188019A (en) * | 2013-03-08 | 2013-07-03 | 华南理工大学 | Microwave signal source based on dual-wavelength single-frequency optical fiber laser |
| CN104051935A (en) * | 2014-06-26 | 2014-09-17 | 中国科学院半导体研究所 | Quadruplicated frequency microwave signal generating device based on photoelectric oscillator |
| CN104518416A (en) * | 2015-01-16 | 2015-04-15 | 中国计量学院 | Tunable optical fiber optical parameter oscillator based on Rayleigh backscattering |
| CN204333585U (en) * | 2015-01-16 | 2015-05-13 | 中国计量学院 | Based on the tunable fiber optical parametric oscillator of random distribution feedback |
| CN105763260A (en) * | 2016-01-16 | 2016-07-13 | 西安电子科技大学 | Device and method of generating triangular waves by using phase modulator and Sagnac ring |
| CN105811225A (en) * | 2016-05-24 | 2016-07-27 | 盐城工学院 | Microwave signal generating device and method of photoelectric oscillator based on liquid-core optical fiber Brillouin scattering effect |
-
2016
- 2016-09-19 CN CN201610846181.9A patent/CN106299977B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188019A (en) * | 2013-03-08 | 2013-07-03 | 华南理工大学 | Microwave signal source based on dual-wavelength single-frequency optical fiber laser |
| CN104051935A (en) * | 2014-06-26 | 2014-09-17 | 中国科学院半导体研究所 | Quadruplicated frequency microwave signal generating device based on photoelectric oscillator |
| CN104518416A (en) * | 2015-01-16 | 2015-04-15 | 中国计量学院 | Tunable optical fiber optical parameter oscillator based on Rayleigh backscattering |
| CN204333585U (en) * | 2015-01-16 | 2015-05-13 | 中国计量学院 | Based on the tunable fiber optical parametric oscillator of random distribution feedback |
| CN105763260A (en) * | 2016-01-16 | 2016-07-13 | 西安电子科技大学 | Device and method of generating triangular waves by using phase modulator and Sagnac ring |
| CN105811225A (en) * | 2016-05-24 | 2016-07-27 | 盐城工学院 | Microwave signal generating device and method of photoelectric oscillator based on liquid-core optical fiber Brillouin scattering effect |
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