CN109257102A - A kind of multistage microwave Frequency Hopping Signal generator based on photon technology - Google Patents
A kind of multistage microwave Frequency Hopping Signal generator based on photon technology Download PDFInfo
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- CN109257102A CN109257102A CN201811157080.6A CN201811157080A CN109257102A CN 109257102 A CN109257102 A CN 109257102A CN 201811157080 A CN201811157080 A CN 201811157080A CN 109257102 A CN109257102 A CN 109257102A
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
Abstract
The invention discloses a kind of multistage microwave Frequency Hopping Signal generator based on photon technology, by light source 100, light polarization modulator 101, Polarization Controller 102, polarization beam apparatus 103, Mach-Zehnder modulators 1041,2, polarization beam combiner 105, photodetector 106 constitute；Wherein light polarization modulator 101, Polarization Controller 102 and polarization beam apparatus 103 constitute the controllable photoswitch 200 of high speed, and port 107 is its digital controlled signal；Microwave modulated signal 108/109 makes Mach-Zehnder modulators 1041,2In different modulation points, 4 rank Frequency Hopping Signals are exported；By by 4 rank Frequency Hopping Signal generation devices carry out it is certain connect in series and parallel, generate the frequency hopping microwave signal of higher order；By manipulating digital signal, Frequency Hopping Signal frequency can realize and be switched fast that carrier frequency is tunable.The configuration of the present invention is simple, control flexibly, can be applied to the importances such as radar system, wireless communication.
Description
Technical field
It is specially a kind of based on the more of photon technology the present invention relates to Microwave photonics, microwave signal generation technique field
Rank microwave Frequency Hopping Signal generator.
Background technique
Frequency hopping microwave signal plays an important role in the fields such as wireless communication, radar system and electronic countermeasure.Nothing
In line communication system, Frequency Hopping Signal has anti-attenuation and noiseproof feature, and system transmission capacity can be improved；Radar system
In, the detection accuracy of radar can be improved in the big time-bandwidth product of Frequency Hopping Signal；In electronic warfare system, the jump of signal frequency
Its anti-investigation can be made to carry out secret communication.Due to electronic bottleneck, Frequency Hopping Signal bandwidth caused by conventional electrical method is used
(~GHz) and frequency hopping speed (~MHz) it is limited.Microwave photon technology has the characteristics such as low-loss, wide bandwidth, electromagnetism interference,
So that generating microwave signal using photon technology becomes the selection most favored.
For current progress, microwave Frequency Hopping Signal is generated using photon technology and is mainly the following scheme: (1)
2 rank Frequency Hopping Signals are generated by control intensity modulator bias point, in conjunction with the methods of light polarization modulator and polarization-maintaining grating；(2) base
It is moulded in spectrum and generates multistage Frequency Hopping Signal with the method for frequency domain to time domain mapping；(3) using directly modulation laser, in conjunction with strong
It spends modulator and the injection locking of principal and subordinate's laser generates multistage Frequency Hopping Signal；(4) tunable optical filtering is integrated based on thermal tuning silicon substrate
The method of device generates multistage Frequency Hopping Signal.
It should be pointed out that 2 rank Frequency Hopping Signals, and the signal bandwidth generated using polarization-maintaining grating can only be generated in scheme 1
It is limited；In scheme 2, light moulding module mostly uses space optics, has the shortcomings that volume is big, loss is big, complicated for operation；Side
In case 3, directly modulated lasers cause modulation rate limited, and the locking of principal and subordinate's laser causes frequency hopping rate limited；In scheme 4, heat is adjusted
It is humorous to be easy affected by environment, it is not sufficiently stable, and frequency hopping rate is low.Can flexibly manipulate as a result, wide bandwidth, high frequency hopping speed it is more
Rank microwave Frequency Hopping Signal generator is more expected to.
Summary of the invention
In view of the above-mentioned problems, multistage frequency hopping microwave letter can be obtained the purpose of the present invention is to provide a kind of structure is simple
Number, and by operation digital signal, realize the multistage microwave frequency hopping letter based on photon technology that multiple frequency high speeds flexibly switch
Number generator.Technical solution is as follows:
A kind of multistage microwave Frequency Hopping Signal generator based on photon technology, including light source, photoswitch, frequency hopper module and light
Electric explorer；The photoswitch includes light polarization modulator, Polarization Controller and polarization beam apparatus；
The linearly polarized light that light source issues is directed at the one of axis of light polarization modulator；
Digital controlled signal loads on progress polarization state modulation on light polarization modulator, so that X and Y is polarized in light polarization modulator
Direction light obtains opposite phase-modulation state；
Modulated light passes through Polarization Controller (102) processing again, makes the main shaft of its polarization state and polarization beam apparatus in 45 °
Angle is interfered when then passing through polarization beam apparatus, is divided into two-way up and down according to digital controlled signal；
The frequency hopper module includes two Mach-Zehnder modulators and polarization beam combiner, and microwave modulated signal difference is defeated
Enter two Mach-Zehnder modulators；
When digital signal is ' 1 ' in microwave modulated signal, Mach-Zehnder modulators are in minimum transfer point, realize
Double Sideband Suppressed Carrier modulation, detects through photodetector, obtains two frequency multiplication microwave signals；
When digital signal is ' 0 ' in microwave modulated signal, Mach-Zehnder modulators are in orthogonal transmission point, have
Best linear modulation characteristic, detects through photodetector, obtains a frequency multiplication microwave signal；
If the microwave modulated signal carrier frequency for loading on two-way is different, beam is closed by polarization beam combiner, and visit through photoelectricity
Device detection is surveyed, quadravalence frequency hopping microwave signal is obtained.
Further, photoswitch being connected after the light source, optical signal being divided into two-way, two ways of optical signals is respective again later
A photoswitch is connected, optical signal is divided into four tunnels, and so on, optical signal is divided into 2nRoad, n=3,4,5 ...；2nLu Guang
A frequency hopper module is respectively connected after signal, then after coupler and photodetector, obtains 2n+1Rank Frequency Hopping Signal.
Further, the carrier frequency tuning range of signal is generated by Mach-Zehnder modulators and photodetector
Bandwidth codetermine.
Further, the Mach-Zehnder modulators are the electrooptic modulator of any achievable intensity modulated.
The beneficial effects of the present invention are: the present invention obtains multistage frequency hopping microwave signal by better simply structure；Pass through behaviour
Make digital signal, it can be achieved that the flexible switching of multiple frequencies high speed；By adjusting the frequency of modulated signal, the carrier wave of Frequency Hopping Signal
Frequency-tunable.
Detailed description of the invention
Fig. 1 is the 4 rank microwave Frequency Hopping Signal generator architecture schematic diagrames of the invention based on photon technology.
Fig. 2 is the 8 rank microwave Frequency Hopping Signal generator architecture schematic diagrames of the invention based on photon technology.
Fig. 3 is experimental result picture of the invention: the two-way microwave modulated signal that figure (a) and figure (b) respectively input；Figure
(c) and figure (d) is respectively the polarization beam apparatus signal that two delivery outlets detect up and down；Figure (e) and figure (f) be respectively Mach-once
The Dare modulator signal that two-way detects up and down；Figure (g) is that the carrier frequency that has generated is 2-/4-/6-/12-GHz, is jumped
Frequency speed is the 4 rank frequency hopping microwave signals of 0.5GHz.
Fig. 4 be experimental result picture of the invention: figure (a) be generate with carrier frequency be 6-/9-/12-/18-GHz,
Frequency hopping speed is the 4 rank frequency hopping microwave signals of 1GHz；Scheme the experimental result picture that (b) is one section of amplification of interception from figure (a).
In figure: 100- light source；101- light polarization modulator；102- Polarization Controller；103- polarization beam apparatus；1041、1042-
Mach-Zehnder modulators；105- polarization beam combiner；106- photodetector；107- digital controlled signal；108,109- microwave
Modulated signal；200- photoswitch；300- frequency hopper module；400- coupler.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.As shown in Figure 1, a kind of be based on light
4 rank frequency hopping microwave signal generators of sub- technology are including light source 100, light polarization modulator 101, Polarization Controller 102, polarization
Beam splitter 103, Mach-Zehnder modulators 1041,2, polarization beam combiner 105, photodetector 106 constitute multistage microwave jump
In frequency signal generator, light polarization modulator 101 has the input port being connected with digital controlled signal 107；Mach-Zehnder
Modulator 1041,2With the port being connected with input microwave modulated signal；Photodetector 106 has and 4 rank Frequency Hopping Signals
Export the port being connected；Output signal carrier frequency and frequency hopping speed are tunable.
The linearly polarized light that light source 100 is issued is directed at the one of axis of light polarization modulator 101, while digital controlled signal
107 load on progress polarization state modulation on light polarization modulator 101, so that X and the polarization direction Y light obtain in light polarization modulator 101
Opposite phase-modulation state.It is handled by Polarization Controller 102, makes the polarization state and polarization beam apparatus 103 of modulated light
Main shaft it is at 45 °, the polarization direction X and Y light is interfered when passing through polarization beam apparatus 103, is divided according to digital controlled signal 107 and is
Upper and lower two-way, if digital controlled signal 107 is ' 0 ' (or ' 1 '), light goes on road, if digital controlled signal 107 be ' 1 ' (or
' 0 '), light goes down road.For having a Mach-Zehnder modulators 104 per all the way1,2, while microwave modulated signal 108,
109 load on Mach-Zehnder modulators 1041,2.When digital signal is ' 1 ' in microwave modulated signal 108,109, Mach-
Zeng Deer modulator 1041,2In minimum transfer point, Double Sideband Suppressed Carrier modulation is realized, by photodetector 106, two times
Frequency microwave signal is available；When digital signal is ' 0 ' in microwave modulated signal 108,109, Mach-Zehnder modulators
1041,2In orthogonal transmission point, there is best linear modulation characteristic, by photodetector 106, a frequency multiplication microwave signal can be obtained
It arrives.If it is different to load on the microwave modulated signal 108 of two-way, 109 carrier frequencies, by detection, 4 rank frequency hopping microwave signals can be obtained
It arrives.
The one of axis of light polarization modulator 101 is aligned by the linearly polarized light that light source 100 issues, and light is injected into Polarization Modulation
Device 101, while digital controlled signal s1(t) light polarization modulator 101 is loaded on, obtaining optical signal electric field may be expressed as:
Wherein EoAnd ωoThe respectively amplitude and angular frequency of light wave, β1=π V1/Vπp, wherein V1For digital controlled signal s1
(t) amplitude, VπpFor the half-wave voltage of light polarization modulator 101.This signal is handled by Polarization Controller 102, makes its polarization state
It is at 45 ° with 103 main shaft of polarizer beam splitting, by adjusting digital signal s1(t) amplitude, the signal that polarization beam splitting 103 exports can
It indicates are as follows:
That is, working as s1(t) when taking ' 0 ', light goes on road, works as s1(t) when taking ' 1 ', light goes down road.
For loading on Mach-Zehnder modulators 104 by control per signal all the way1,2On microwave modulated signal,
By photodetection, 2 rank microwave Frequency Hopping Signals of rapid jumping are available.For the analysis of the road Qu Shang, microwave modulated signal 108 adds
It is loaded in Mach-Zehnder modulators 1041Microwave modulated signal may be expressed as:
Wherein s2It (t) is the digital controlled signal in microwave modulated signal 108, a and b are respectively digital controlled signal s2(t)
Microwave signal amplitude when ' 0 ' and ' 1 ', ω1For 108 microwave carrier angular frequency (ω of microwave modulated signal1=2 π f1).Mach-was once
Dare modulator 1041Output optical signal may be expressed as:
Wherein, VπMFor Mach-Zehnder modulators 1041Half-wave voltage, δ be bias voltage caused by phase difference.Pass through
Photodetector 106 detects, and obtained electric signal may be expressed as:
WhereinAbove formula is subjected to Bessel function of the first kind expansion, ignores higher order term,
It may be expressed as:
If digital controlled signal s2(t) be ' 0 ' when, adjust corresponding microwave signal amplitude and biased electrical be pressed withI.e. so that Mach-Zehnder modulators 1041Positioned at the orthogonal biography with maximum linear modulating characteristic
It is defeated, that is, have:
If digital controlled signal s2(t) be ' 1 ' when, adjusting corresponding microwave signal amplitude hasI.e.
So that Mach-Zehnder modulators 1041Positioned at minimum transfer point, carrier suppressed modulation is realized, two frequency multiplication microwave signals can obtain
It arrives, it may be assumed that
In the presence ofObtained microwave signal can further be indicated are as follows:
Similarly, the analysis of lower road can be obtained:
Wherein, ω2For the carrier angular frequencies (ω of microwave modulated signal 1092=2 π f2, ω2≠ω1), microwave modulated signal
Digital controlled signal is same in 109 is taken as s2(t)。
Upper and lower two ways of optical signals, after the joint of polarization beam combiner 105, by 106,4 rank frequency hopping microwave of photodetector
Signal can be realized as follows:
As shown in Fig. 2, by above-mentioned apparatus carry out it is certain connect in series and parallel, the frequency hopping microwave signal of higher order can produce.Such as,
A photoswitch 200 being made of light polarization modulator 101, Polarization Controller 102, polarization beam apparatus 103 is followed by light source 1001
Optical signal is divided into two-way, sequentially connects a photoswitch 200 per each all the way2,3, one by MZ Mach-Zehnder 1041,2, polarization close
The frequency hopper module 300 that beam device 105 is constituted1,2, after coupler 400 and photodetector 106,8 rank Frequency Hopping Signals are available.
Port 5001-3For the digital controlled signal of 8 rank Frequency Hopping Signals.
Similarly, other high order frequency hopping microwave signals can also be practiced midwifery in series and parallel life with 4 rank Frequency Hopping Signal devices.Light source
Optical signal is divided into two-way by connection photoswitch 200 after 100, respectively connects a photoswitch 200 again after two ways of optical signals, will
Optical signal is divided into four tunnels, and so on, optical signal is divided into 2nRoad, n=3,4,5 ...；2nRespectively connection one after the optical signal of road
A frequency hopper module 300, then after coupler 400 and photodetector 106, obtain 2n+1Rank Frequency Hopping Signal.
The part of test results of the 4 rank frequency hopping microwave signal generators based on photon technology: the wavelength of light source 100 in experiment
For 1550.080nm, digital controlled signal 107 is the digital baseband signal of different bit rates difference code word, microwave modulated signal
108,109 be different carrier frequencies microwave modulated signal.
Fig. 3 is experimental result of the invention.Digital controlled signal s1(t) code word and bit rate be respectively " 00110011 " and
0.5Gbit/s, digital controlled signal s in microwave modulated signal2(t) code word and bit rate be respectively " 01100110 " and
0.5Gbit/s, carrier frequency are respectively 2GHz and 6GHz.Figure (a) and figure (b) be respectively port input microwave modulated signal 108,
109.Figure (c) and figure (d) are respectively the signal that about 103 two delivery outlet of polarization beam apparatus detects.Scheme (e) and figure (f) respectively
For Mach-Zehnder modulators 1041,2The signal that upper and lower two-way detects；Figure (g) is the 4 rank frequency hopping microwave signals generated, is carried
Wave frequency rate 2-/4-/6-/12-GHz corresponds respectively to control signal s1(t)s2It (t) is 00/01/11/10, frequency hopping speed is
0.5GHz。
Fig. 4 is experimental result of the invention.Digital controlled signal s1(t) code word and bit rate be respectively pseudo noise code and
1Gbit/s, digital controlled signal s in microwave modulated signal2(t) code word and bit rate are respectively pseudo noise code and 1Gbit/s, are carried
Wave frequency rate is respectively 6GHz and 9GHz.Figure (a) be generate with carrier frequency be 6-/9-/12-/18-GHz, frequency hopping speed is
The 4 rank frequency hopping microwave signals of 1GHz.Scheming (b) is the result figure that one section of amplification is intercepted from figure (a).
By result above it can be observed that the present invention can be realized carrier frequency and the adjustable 4 rank frequency hopping microwave of frequency hopping speed
The function of signal, and frequency hopping speed reaches GHz.
In conclusion feature of the invention mainly has the following: (1) can flexibly be switched at high speed by controlling digital signal
Generate the carrier wave of signal；(2) carrier frequency of signal and switch speed are tunable；Reference carrier frequency is by Mach-Zehnder tune
The bandwidth of device 104 processed and photodetector 106 determines；(3) by the way that 4 rank Frequency Hopping Signal generating means are carried out centainly series-parallel
It connects, the frequency hopping microwave signal of other high orders produces.
In actual implementation, Mach-Zehnder modulators 104 can be the electro-optical modulation of any achievable intensity modulated
Device.
Claims (4)
1. a kind of multistage microwave Frequency Hopping Signal generator based on photon technology, which is characterized in that opened including light source (100), light
Close (200), frequency hopper module (300) and photodetector (106)；The photoswitch (200) include light polarization modulator (101), partially
Shake controller (102) and polarization beam apparatus (103)；
The linearly polarized light that light source (100) issues is directed at light polarization modulator (101) one of axis；
Digital controlled signal (107) loads on progress polarization state modulation on light polarization modulator (101), so that light polarization modulator
(101) X obtains opposite phase-modulation state with the polarization direction Y light in；
Modulated light passes through Polarization Controller (102) processing again, makes its polarization state and the main shaft of polarization beam apparatus (103) is in
45 ° of angles are interfered when then passing through polarization beam apparatus (103), are divided into two-way up and down according to digital controlled signal (107)；
The frequency hopper module (300) includes two Mach-Zehnder modulators (1041、1042) and polarization beam combiner (105), it is micro-
Wave modulated signal (108,109) inputs two Mach-Zehnder modulators (104 respectively1、1042)；
When digital signal is ' 1 ' in microwave modulated signal (108,109), Mach-Zehnder modulators (1041、1042) be in
Minimum transfer point realizes Double Sideband Suppressed Carrier modulation, detects through photodetector (106), obtain two frequency multiplication microwave signals；
When digital signal is ' 0 ' in microwave modulated signal (108,109), Mach-Zehnder modulators (1041、1042) be in
Orthogonal transmission point has best linear modulation characteristic, detects through photodetector (106), obtains a frequency multiplication microwave signal；
If microwave modulated signal (the 108,109) carrier frequency for loading on two-way is different, beam is closed by polarization beam combiner (105),
And detected through photodetector (106), obtain quadravalence frequency hopping microwave signal.
2. the multistage microwave Frequency Hopping Signal generator according to claim 1 based on photon technology, which is characterized in that described
Photoswitch (200) are connected after light source (100), optical signal is divided into two-way, respectively connect a light again after two ways of optical signals and open
It closes (200), optical signal is divided into four tunnels, and so on, optical signal is divided into 2nRoad, n=3,4,5 ...；2nAfter the optical signal of road
Respectively one frequency hopper module (300) of connection, then after coupler (400) and photodetector (106), obtain 2n+1Rank frequency hopping
Signal.
3. the multistage microwave Frequency Hopping Signal generator according to claim 1 or 2 based on photon technology, which is characterized in that
The carrier frequency tuning range of signal is generated by Mach-Zehnder modulators (1041、1042) with the band of photodetector (106)
Width codetermines.
4. the multistage microwave Frequency Hopping Signal generator according to claim 1 or 2 based on photon technology, which is characterized in that
The Mach-Zehnder modulators (1041、1042) it is any electrooptic modulator that intensity modulated can be achieved.
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| CN109818680A (en) * | 2019-03-04 | 2019-05-28 | 南京航空航天大学 | Microwave photon wide band radio-frequency receiving/transmission method and device |
| CN111522064A (en) * | 2020-04-27 | 2020-08-11 | 山东大学 | High-order pseudorandom electromagnetic exploration signal generation method and system |
| CN111835428A (en) * | 2019-04-22 | 2020-10-27 | 西安电子科技大学 | Optical generation method of double-frequency-band multi-phase coding signal with adjustable frequency multiplication factor |
| CN113507326A (en) * | 2021-06-30 | 2021-10-15 | 中国人民解放军空军工程大学 | Electric/optical frequency hopping carrier generator based on photon technology |
| CN114142889A (en) * | 2021-08-27 | 2022-03-04 | 西安空间无线电技术研究所 | Reconfigurable broadband high-frequency hopping signal generation method |
| CN114301538A (en) * | 2021-12-31 | 2022-04-08 | 杭州电子科技大学 | Phase coding signal generation system and method based on DOMZM |
| CN115001533A (en) * | 2022-05-27 | 2022-09-02 | 浙江师范大学 | Microwave signal coding frequency hopping device based on light injection external cavity type FP-LD |
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| CN107528638B (en) * | 2017-07-27 | 2019-12-10 | 西安电子科技大学 | Broadband microwave signal arrival angle estimation method based on microwave photon filtering |
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| CN109818680A (en) * | 2019-03-04 | 2019-05-28 | 南京航空航天大学 | Microwave photon wide band radio-frequency receiving/transmission method and device |
| CN109818680B (en) * | 2019-03-04 | 2020-03-10 | 南京航空航天大学 | Microwave photon broadband radio frequency transceiving method and device |
| CN111835428A (en) * | 2019-04-22 | 2020-10-27 | 西安电子科技大学 | Optical generation method of double-frequency-band multi-phase coding signal with adjustable frequency multiplication factor |
| CN111835428B (en) * | 2019-04-22 | 2021-08-20 | 西安电子科技大学 | Optical generation method of double-frequency-band multi-phase coding signal with adjustable frequency multiplication factor |
| CN111522064A (en) * | 2020-04-27 | 2020-08-11 | 山东大学 | High-order pseudorandom electromagnetic exploration signal generation method and system |
| CN113507326A (en) * | 2021-06-30 | 2021-10-15 | 中国人民解放军空军工程大学 | Electric/optical frequency hopping carrier generator based on photon technology |
| CN114142889A (en) * | 2021-08-27 | 2022-03-04 | 西安空间无线电技术研究所 | Reconfigurable broadband high-frequency hopping signal generation method |
| CN114301538A (en) * | 2021-12-31 | 2022-04-08 | 杭州电子科技大学 | Phase coding signal generation system and method based on DOMZM |
| CN114301538B (en) * | 2021-12-31 | 2024-01-05 | 杭州电子科技大学 | DOMZM-based phase coding signal generation system and method |
| CN115001533A (en) * | 2022-05-27 | 2022-09-02 | 浙江师范大学 | Microwave signal coding frequency hopping device based on light injection external cavity type FP-LD |
| CN115001533B (en) * | 2022-05-27 | 2023-09-22 | 浙江师范大学 | Microwave signal coding frequency hopping device based on light injection external cavity type FP-LD |
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