CN103346469B - A kind of optical-electronic oscillator - Google Patents
A kind of optical-electronic oscillator Download PDFInfo
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- CN103346469B CN103346469B CN201310246130.9A CN201310246130A CN103346469B CN 103346469 B CN103346469 B CN 103346469B CN 201310246130 A CN201310246130 A CN 201310246130A CN 103346469 B CN103346469 B CN 103346469B
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Abstract
The invention provides a kind of optical-electronic oscillator, for carrying out optoelectronic oscillation to multiwavelength laser simultaneously, it comprises electrooptic modulator, image intensifer, optical splitter, optical-electrical converter, microwave amplifier and filter composition loop, and this loop forms the primary structure of optical-electronic oscillator.Beneficial effect of the present invention is: the present invention makes multiwavelength laser participate in optoelectronic oscillation simultaneously, substantially increases the operating efficiency of optical-electronic oscillator, and laser can form high-quality microwave signal by multiple oscillation in photoelectricity mixing loop; The present invention utilizes wavelength-division multiplex technique to be exported by multiple passage by the laser being loaded with the different wave length of microwave signal simultaneously, substantially increases the output capacity of optical-electronic oscillator; Structure of the present invention is simple, only needs simply to adjust Traditional photovoltaic oscillator; The present invention has very large channel capacity, is applicable to Optical Controlled Phased Array Antenna, light carrier radio communication and Microwave photonics field.
Description
Technical field
The invention belongs to microwave photon optical-electronic oscillator technical field, particularly relate to a kind of optical-electronic oscillator.
Background technology
Optical-electronic oscillator can as the high-quality microwave source of one, and it has application in Optical Controlled Phased Array Antenna, light carrier radio communication (ROF, Radio-over-fiber) and Microwave photonics field.
In optical-electronic oscillator structure, usually adopt the Single wavelength of laser as light source, realize microwave utilizing microwave power distributor after opto-electronic conversion and export (see patent: based on the broadband continuously adjustable optical-electronic oscillator of stimulated Brillouin scattering effect, publication number: CN102751644A).
Patent (a kind of frequency broadband tunable optical electrical oscillator regulated based on optical maser wavelength, publication number: CN102368582A) adopt tunable laser to realize optical-electronic oscillator, main purpose is that Different lightwave is long forms different difference on the frequencies from fixing Fiber Bragg Grating FBG in order to utilize, thus obtain different frequency microwave export, and in utilize microwave power distributor export microwave signal.But be not that multiwavelength laser participates in vibration in optical-electronic oscillator, regulate each time, the light signal that only there is a wavelength vibrates in loop configuration simultaneously.
Patent (has the optical-electronic oscillator of optical resonator, publication number: CN1338135A; Optoelectronic oscillator with tunable broadband frequency, publication number: CN102163795A; With the optical-electronic oscillator of active semiconductor resonant cavity, publication number: CN102163801A) structure that all adopts photoelectricity simultaneously to export, but do not adopt multiwavelength laser as the light signal of starting of oscillation, only there is a passage in its output optical port.
Document (Jiang Yang, Yu Jinlong, Zhang Litai etc., " utilize single light source optical-electronic oscillator to realize multi-wavelength light pulse and electrical clock signal produces ", Acta Optica, 2009, vol.29, no.28, pp.2093-2098) utilize the mode of direct modulation light in optical-electronic oscillator, produce multi-wavelength light pulse, its output utilizes optical WDM device to adopt optical port to export by after the light wave cutting of broadening, optical channel number achieved by it depends on single light source spectral width in directly modulation situation, only realizes 5 passages.
In sum, be necessary to design a kind of novel optical-electronic oscillator, make multiwavelength laser participate in optoelectronic oscillation simultaneously, and export the laser being loaded with microwave signal of different wave length simultaneously.
Summary of the invention
In order to overcome the defect existed in prior art, the present invention aims to provide a kind of optical-electronic oscillator, makes multiwavelength laser participate in optoelectronic oscillation simultaneously, and exports the laser being loaded with microwave signal of different wave length simultaneously.Concrete technical scheme is as follows:
A kind of optical-electronic oscillator, for carrying out optoelectronic oscillation to multiwavelength laser simultaneously, comprises electrooptic modulator, image intensifer, optical splitter, optical-electrical converter, microwave amplifier and filter; Wherein:
Electrooptic modulator, image intensifer, optical splitter, optical-electrical converter, microwave amplifier are connected successively with filter, and filter access electrooptic modulator forms loop;
Multiwavelength laser source sends an original laser, and described original laser is amplified through electrooptic modulator access image intensifer; By optical splitter, the laser after amplification is divided into two-way laser again, two-way laser is respectively first via laser and the second road laser, and first via laser is used for exporting, the second road laser access optical-electrical converter; Second road laser is converted to microwave signal by optical-electrical converter, again microwave signal is accessed microwave amplifier to amplify, microwave signal access filter after amplifying carries out filtering, microwave signal access electrooptic modulator through filtering is modulated original laser, microwave signal being carried in original laser through filtering.
As prioritization scheme, the present invention also comprises the Second Wave division multiplexer be connected with optical splitter; First via laser access Second Wave division multiplexer, is exported the laser being loaded with microwave signal of different wave length by Second Wave division multiplexer.
As prioritization scheme, Second Wave division multiplexer is the wavelength division multiplexer of diaphragm filtering type or the wavelength division multiplexer of array waveguide grating.
As prioritization scheme, the port number of Second Wave division multiplexer and the number of wavelengths in each channel center wavelength and multiwavelength laser source and centre wavelength are consistent.
As prioritization scheme, electrooptic modulator adopts electric light amplitude modulaor or electro-optic phase modulator.
As prioritization scheme, optical splitter adopts fiber coupler, and the splitting ratio of fiber coupler is 3dB.
As prioritization scheme, filter adopts microwave tunable filter or microwave narrow-band or band pass filter.
As prioritization scheme, multiwavelength laser source adopts single channel to export the lasing light emitter of multiwavelength laser simultaneously; Or adopt multiple different wave length lasing light emitter to access the mode of first wave division multiplexer, the Laser synthesizing of the multi beam different wave length exported by multiple different wave length lasing light emitter by first wave division multiplexer is a branch of, forms a multiwavelength laser source.
A kind of optical-electronic oscillator, for carrying out optoelectronic oscillation to multiwavelength laser simultaneously, comprises electrooptic modulator, image intensifer, filter, optical splitter, optical-electrical converter and microwave amplifier; Wherein:
Electrooptic modulator, image intensifer, filter, optical splitter, optical-electrical converter are connected successively with microwave amplifier, and microwave amplifier access electrooptic modulator forms loop;
Multiwavelength laser source sends an original laser, and described original laser is amplified through electrooptic modulator access image intensifer; Laser access filter after amplifying carries out filtering, then by optical splitter, filtered laser is divided into two-way laser, and two-way laser is respectively first via laser and the second road laser, and first via laser is used for exporting, the second road laser access optical-electrical converter; Second road laser is converted to microwave signal by optical-electrical converter, then microwave signal is accessed microwave amplifier amplifies, and the microwave signal access electrooptic modulator through amplifying is modulated original laser, microwave signal is carried in original laser.
As prioritization scheme, filter adopts the filter of area of light.
Beneficial effect of the present invention is:
(1) the present invention makes multiwavelength laser participate in optoelectronic oscillation simultaneously, substantially increases the operating efficiency of optical-electronic oscillator, and laser can form high-quality microwave signal by multiple oscillation in photoelectricity mixing loop;
(2) the present invention utilizes wavelength-division multiplex technique to be exported by multiple passage by the laser being loaded with the different wave length of microwave signal simultaneously, substantially increases the output capacity of optical-electronic oscillator;
(3) structure of the present invention is simple, only needs simply to adjust Traditional photovoltaic oscillator;
(4) the present invention improves the performance of laser generation and the transmission loading high-quality microwave signal simultaneously, directly can enter optic path;
(5) the present invention has very large channel capacity, is also applicable to two dimensional phased battle array radar simultaneously.
Accompanying drawing explanation
By reference to the accompanying drawings, by hereafter state detailed description, more clearly can understand above-mentioned and other feature and advantage of the present invention, wherein:
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structure chart that embodiment 1 is applied in Optical Controlled Phased Array Antenna system;
Fig. 3 is the structural representation of the embodiment of the present invention 2.
In upper figure, sequence number is:
1-electrooptic modulator, 2-image intensifer, 3-optical splitter, 4-optical-electrical converter, 5-microwave amplifier, 6-filter, 7-multiwavelength laser source, 8-Second Wave division multiplexer, 9-microwave antenna.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Embodiment 1:
As shown in Figure 1, a kind of optical-electronic oscillator, for carrying out optoelectronic oscillation to multiwavelength laser simultaneously, comprises electrooptic modulator 1, image intensifer 2, optical splitter 3, optical-electrical converter 4, microwave amplifier 5, filter 6 and Second Wave division multiplexer 8; Wherein:
Electrooptic modulator 1, image intensifer 2, optical splitter 3, optical-electrical converter 4, microwave amplifier 5 are connected successively with filter 6, and filter 6 accesses electrooptic modulator 1 forms loop; Namely this loop constitutes the primary structure of optical-electronic oscillator in the present embodiment; Optical splitter 3 is connected with Second Wave division multiplexer 8.
Multiwavelength laser source 7 sends an original laser, and original laser accesses image intensifer 2 through electrooptic modulator 1 and amplifies; By optical splitter 3, the laser after amplification is divided into two-way laser again, two-way laser is respectively first via laser and the second road laser, first via laser access Second Wave division multiplexer 8, for exporting, and the second road laser access optical-electrical converter 4; Second road laser is converted to microwave signal by optical-electrical converter 4, again microwave signal is accessed microwave amplifier 5 to amplify, microwave signal access filter 6 after amplifying carries out filtering, microwave signal access electrooptic modulator 1 pair of original laser through filtering is modulated, and the microwave signal through filtering is carried in original laser.Continuation circulation like this, each first via laser exports the laser being loaded with microwave signal of different wave length by Second Wave division multiplexer 8; And each second road laser access optical-electrical converter 4 transfers microwave signal to.
The operation principle of the present embodiment is: each wavelength laser is after the loop of optical-electronic oscillator, be loaded with microwave signal, under link light/electric gain is greater than the condition of loss, laser is carried vibration that microwave signal realizes microwave signal in the feedback loop, by the energy storage capacity of long optical fibers, outputting high quality microwave signal simultaneously.Recycling wavelength-division multiplex technique, the mode making the output of optical-electronic oscillator adopt multi-wavelength light wave independent of each other simultaneously to export, directly for subsequent optical link provides microwave source.
The number of wavelengths of Second Wave division multiplexer 8 is N, is labeled as: wavelength 1, wavelength 2 ..., wavelength N, corresponding frequency is
,
...,
, the microwave frequency that optical-electronic oscillator is formed is
.In the light output of Second Wave division multiplexer 8, corresponding output frequency is respectively
,
with
,
,
with
...,
,
with
.
Second Wave division multiplexer 8 frequency interval is generally designed to definite value, is labeled as:
, then in the optical-electronic oscillator of this structure, should make:
，
The microwave signal produced can be avoided like this to be filtered by Second Wave division multiplexer 8 when exporting.
In the present embodiment, electrooptic modulator 1 adopts electric light amplitude modulaor, but is not limited to electric light amplitude modulaor, also can adopt electro-optic phase modulator.Optical splitter 3 adopts fiber coupler, and the splitting ratio of fiber coupler is 3dB, but the splitting ratio of fiber coupler is not limited to 3dB.Filter 6 adopts microwave tunable filter 6, but is not limited thereto, and can also adopt microwave narrow-band 6 or band pass filter 6.Multiwavelength laser source 7 adopts single channel to export the lasing light emitter of multiwavelength laser simultaneously, but is not limited thereto; Also multiple different wave length lasing light emitter can be adopted to access the mode of first wave division multiplexer, and the Laser synthesizing of the multi beam different wave length exported by multiple different wave length lasing light emitter by first wave division multiplexer is a branch of, forms a multiwavelength laser source 7.Second Wave division multiplexer 8 is the wavelength division multiplexer of diaphragm filtering type, but is not limited thereto, and also can adopt the wavelength division multiplexer of array waveguide grating.The port number of Second Wave division multiplexer 8 and the number of wavelengths in each channel center wavelength and multiwavelength laser source 7 and centre wavelength are consistent.
Apply the present invention to system construction drawing in phased array radar as shown in Figure 2, the end of each wavelength channel of Second Wave division multiplexer 8 is all connected with optical-electrical converter 4, and each optical-electrical converter 4 is all connected with microwave antenna 9.Multiwavelength laser source 7 is exported by Second Wave division multiplexer 8 after luminous point oscillator structure of the present invention, the laser of the different wave length that each for Second Wave division multiplexer 8 wavelength channel exports is converted to microwave signal by optical-electrical converter 4, and these microwave signals are launched by microwave antenna 9.
Embodiment 2:
As shown in Figure 3, a kind of optical-electronic oscillator, for carrying out optoelectronic oscillation to multiwavelength laser simultaneously, comprises electrooptic modulator 1, image intensifer 2, filter 6, optical splitter 3, optical-electrical converter 4, microwave amplifier 5 and Second Wave division multiplexer 8; Wherein:
Electrooptic modulator 1, image intensifer 2, filter 6, optical splitter 3, optical-electrical converter 4 are connected successively with microwave amplifier 5, and microwave amplifier 5 accesses electrooptic modulator 1 forms loop; Namely this loop constitutes the primary structure of optical-electronic oscillator in the present embodiment; Optical splitter 3 is connected with Second Wave division multiplexer 8.
Multiwavelength laser source 7 sends an original laser, and original laser accesses image intensifer 2 through electrooptic modulator 1 and amplifies; Laser access filter 6 after amplifying carries out filtering, by optical splitter 3, filtered laser is divided into two-way laser again, two-way laser is respectively first via laser and the second road laser, first via laser access Second Wave division multiplexer 8, for exporting, the second road laser access optical-electrical converter 4; Second road laser is converted to microwave signal by optical-electrical converter 4, again microwave signal is accessed microwave amplifier 5 to amplify, microwave signal access electrooptic modulator 1 pair of original laser through amplifying is modulated, and the microwave signal through filtering is carried in original laser.The present embodiment and embodiment 1 all have employed the primary structure of loop structure as optical-electronic oscillator, difference is that the present embodiment carries out filtering to laser in the optical link of loop, and embodiment 1 carries out filtering to microwave signal in the electricity link of loop, other structure & working mechanism of the present embodiment are identical with embodiment 1, do not repeat them here.
In the present embodiment, filter 6 adopts the filter 6 of area of light; Other components and parts of the present embodiment are identical with embodiment 1, do not repeat them here.
The present invention can realize in many different forms, and should not be construed as by the restriction in the embodiment of this proposition.
Claims (9)
1. an optical-electronic oscillator, for carrying out optoelectronic oscillation to multiwavelength laser simultaneously, is characterized in that, comprises electrooptic modulator, image intensifer, optical splitter, optical-electrical converter, microwave amplifier and filter; Wherein:
Described electrooptic modulator, described image intensifer, described optical splitter, described optical-electrical converter, described microwave amplifier are connected successively with described filter, and described filter accesses described electrooptic modulator formation loop;
Multiwavelength laser source sends an original laser, and described original laser accesses described image intensifer through described electrooptic modulator and amplifies; By described optical splitter, the laser after amplification is divided into two-way laser again, described two-way laser is respectively first via laser and the second road laser, and described first via laser is used for exporting, and described second road laser accesses described optical-electrical converter; Described second road laser is converted to microwave signal by described optical-electrical converter, again described microwave signal is accessed described microwave amplifier to amplify, described microwave signal after amplifying accesses described filter and carries out filtering, described microwave signal through filtering accesses described electrooptic modulator and modulates described original laser, is carried in described original laser by the described microwave signal through filtering;
Also comprise the Second Wave division multiplexer be connected with described optical splitter; Described first via laser accesses described Second Wave division multiplexer, is exported the laser being loaded with microwave signal of different wave length by described Second Wave division multiplexer.
2. a kind of optical-electronic oscillator according to claim 1, is characterized in that, described Second Wave division multiplexer is the wavelength division multiplexer of diaphragm filtering type or the wavelength division multiplexer of array waveguide grating.
3. a kind of optical-electronic oscillator according to claim 1, is characterized in that, number of wavelengths and the centre wavelength in the port number of described Second Wave division multiplexer and each channel center wavelength and described multiwavelength laser source are consistent.
4. a kind of optical-electronic oscillator according to claim 1, is characterized in that, described electrooptic modulator is electric light amplitude modulaor or electro-optic phase modulator.
5. a kind of optical-electronic oscillator according to claim 1, is characterized in that, described optical splitter is fiber coupler, and the splitting ratio of described fiber coupler is 3dB.
6. a kind of optical-electronic oscillator according to claim 1, is characterized in that, described filter is microwave tunable filter or microwave narrow-band or band pass filter.
7. a kind of optical-electronic oscillator according to claim 1, is characterized in that, described multiwavelength laser source comprises single lasing light emitter, and described single lasing light emitter exports the laser of multi-wavelength simultaneously by single channel; Or described multiwavelength laser source comprises the lasing light emitter of multiple different wave length, the lasing light emitter of described multiple different wave length accesses a first wave division multiplexer, a branch of output of Laser synthesizing of the multi beam different wave length exported by the lasing light emitter of described multiple different wave length by described first wave division multiplexer.
8. an optical-electronic oscillator, for carrying out optoelectronic oscillation to multiwavelength laser simultaneously, is characterized in that, comprises electrooptic modulator, image intensifer, filter, optical splitter, optical-electrical converter and microwave amplifier; Wherein:
Described electrooptic modulator, described image intensifer, described filter, described optical splitter, described optical-electrical converter are connected successively with described microwave amplifier, and described microwave amplifier accesses described electrooptic modulator formation loop;
Multiwavelength laser source sends an original laser, and described original laser accesses described image intensifer through described electrooptic modulator and amplifies; Laser after amplifying accesses described filter and carries out filtering, by described optical splitter, filtered described laser is divided into two-way laser again, described two-way laser is respectively first via laser and the second road laser, described first via laser is used for exporting, and described second road laser accesses described optical-electrical converter; Described second road laser is converted to microwave signal by described optical-electrical converter, again described microwave signal is accessed described microwave amplifier to amplify, described microwave signal through amplifying accesses described electrooptic modulator and modulates described original laser, described microwave signal is carried in described original laser.
9. a kind of optical-electronic oscillator according to claim 8, is characterized in that, described filter adopts the filter of area of light.
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| CN103941235B (en) * | 2014-02-26 | 2016-07-06 | 上海交通大学 | Full Optical Controlled Phased Array Antenna transmitter |
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| CN105514764A (en) * | 2015-12-17 | 2016-04-20 | 北京无线电计量测试研究所 | Optoelectronic oscillator based on bidirectional injection locking structure |
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| CN106501792A (en) * | 2016-10-08 | 2017-03-15 | 浙江大学 | A kind of reconstruct Optical Controlled Phased Array Antenna emitter exchanged based on light |
| CN106532430B (en) * | 2016-11-24 | 2020-01-31 | 浙江大学 | frequency and wavelength dual tunable frequency modulation continuous wave optical carrier signal generation system |
| CN107085386B (en) * | 2017-03-27 | 2019-05-21 | 华中科技大学 | One kind can distributed multidimensional traffic beam scan method and device |
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| US8717657B2 (en) * | 2010-05-28 | 2014-05-06 | University Of Central Florida Research Foundation, Inc. | Optoelectronic oscillator using a high finesse etalon |
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| CN102751644A (en) * | 2012-07-31 | 2012-10-24 | 西南交通大学 | Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect |
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