CN104698542B - Microwave optical fiber delay line - Google Patents
Microwave optical fiber delay line Download PDFInfo
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- CN104698542B CN104698542B CN201410778021.6A CN201410778021A CN104698542B CN 104698542 B CN104698542 B CN 104698542B CN 201410778021 A CN201410778021 A CN 201410778021A CN 104698542 B CN104698542 B CN 104698542B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 85
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims description 36
- 238000006073 displacement reaction Methods 0.000 claims description 34
- 230000007774 longterm Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000009415 formwork Methods 0.000 claims 1
- 230000010363 phase shift Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
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- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
- G02B6/2934—Fibre ring resonators, e.g. fibre coils
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- Optics & Photonics (AREA)
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- Light Guides In General And Applications Therefor (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
A microwave optical fiber delay line comprises a laser, an electro-optical modulator, a 1: 1 2 × 2 coupler, an erbium-doped optical fiber amplifier, a delay optical fiber, a frequency shift module, an N-path dense wavelength division demultiplexer, a 2N-path dense wavelength division demultiplexer, an N × 1 optical control switch, a 2N × 1 optical control switch, a 1 × M optical splitter, M-section optical fibers in an arithmetic progression, an M × 1 optical control switch, a broadband detector and a logic control unit.
Description
Technical field
The present invention relates to delay line, particularly a kind of microwave optical fiber delay line.
Background technology
It is insoluble problem for a long time that Hi-Fi microwave storage organization, which is realized,.To the radar signal of reception
Reconstruct, Hi-Fi processing have many important applications in modern radar and system of defense.Microwave storage is modern electricity
Essential elements in son confrontation.In such applications, microwave memory is used to storing and again launching enemy's detection radar pulse letter
Number one or more replica signals, by remembering the instant pulse signal of radar and forwarding again in accurate control time, microwave
Memory can cheat enemy and threaten radar, however, being limited to, in the limitation of microwave frequency A/D conversion accuracies, use electronics
Technology realizes that the complicated waveform of storage of high-fidelity and required microwave radar pulse are particularly difficult.Electronic digit microwave stores
(DRFM) it is the currently the only method to the microwave signal storage that is concerned with, however, this method is limited to most important limiting factor：
Broadband instant bandwidth and big dynamic range can not be realized simultaneously.Unwanted spuious item limits its dynamic model caused by DRFM
Enclose, for contrary frequency agile radar or processing pulse compression radar waveform, it is necessary to which microwave storage interference unit has wide instantaneous band
Width, however, it is only 1GHz-2GHz that commercial DRFM instant bandwidths are maximum.
The method of Microwave photonics technology provides a kind of solution method for the problem, because to microwave and millimeter wave
Modulated signal, fiber waveguide are one of best delay line media；Photonic signal processing, which provides, to be overcome by traditional electric signal
This bottleneck of limited sample rate caused by reason.
The implementation of quick regulation optical delay line mainly has at present：
One of first scheme is that addition optical fiber shift frequency device prevents in ring retard using fiber-optic re-circulation delay ring structure
Laser self-oscillation is produced, controls RF pulses to enter the time of loop using photoswitch, prolongs accordingly so that RF signals obtain
When, but this method is limited only to be applicable RF pulse signals, can not realize the delay adjusting to continuous RF signals, and stepping-in amount is not
Enough fine, minimum step amount is also dozens of ns.【Tuan A.Nguyen,Erwin H.W.Chan,and Robert
A.Minasian Photonic Radio Frequency Memory Using Frequency Shifting
Recirculating Delay Line Structure.Journal of Lightwave Technology,Vol.32,
NO.1,Jan 1,2014,99-106】；
The two of first method are the structures that several fixed delays are realized using photoswitch (or switch cascade structure), this method
The shortcomings that be that adjustable delay time amount number is few, delay volume tuning range and time delay stepping-in amount can not be taken into account simultaneously, and adjustable delay time amount
To increase be premised on switching number increase；【G.W.Stimson,Introduction to Airborne Radar,
SciTech Publishing Inc.,1998】
The content of the invention
It is an object of the invention to provide a kind of microwave optical fiber delay line, the delay line has big retardation tuning range, height
Fineness stepping, the quasi-continuous adjustable storage of delay forward continuous or pulsed microwave signals device, continuous or pulsed microwave signals
Frequency can be any wideband frequency in electrooptic modulator bandwidth microwave signal.
The core concept of the present invention：Utilize fiber-optic re-circulation ring retard delay technique, close wavelength-division multiplex technology and light
The fine delay selection technique learned in multiple beam forming network (Optical Beamforming Network, referred to as OBFN) is realized
The delay of big tuning range, high-precision stepping-in amount is realized, so as to realize reprocessing and forwarding that RF signals are received to radar.Its
In, fiber-optic re-circulation ring retard delay technique realizes coarse delay amount and the selection of middle retardation of time delay, close wavelength-division multiplex technology
Realize the selection of delay loop way.The combination of three kinds of technologies can realize big delay volume tuning range, fine stepping
Delay.
The technical solution of the present invention is as follows：
A kind of microwave optical fiber delay line, feature are that its composition includes laser, rf signal generator, Electro-optical Modulation
Device, the first frequency displacement module, the first optical fiber, the first fiber amplifier, the one 2 × 2nd coupler, 1 × N super-intensives wavelength-division demultiplexing
The photoswitch of device, N × 1, the second frequency displacement module, the second optical fiber, the second fiber amplifier, the 22 × 2nd coupler, 1 × 2N super-intensives
Solve the photoswitch of wavelength division multiplexer, the photoswitch of 2N × 1,1 × L beam splitter, M × 1, length be in arithmetic progression M roots optical fiber and light
Electric explorer, the first optical fiber is formed by the first frequency displacement module, the first optical fiber, the first fiber amplifier and the one 2 × 2nd coupler and followed
Ring ring retard, the second optical fiber is formed by the second frequency displacement module, the second optical fiber, the second fiber amplifier and the 22 × 2nd coupler and followed
Ring ring retard；The second described optical fiber circulation delay ring and the structure of the first optical fiber circulation delay ring it is identical but described second
The length of optical fiber is the 1/N of the length of the first optical fiber, and N is positive integer；
The optical signal of described laser output enters the optical signal input mouth of described electrooptic modulator, and described penetrates
The radiofrequency signal port of electrooptic modulator described in the output termination of frequency signal generator；The output end of described electrooptic modulator
The b ports of the one 2 × 2nd described coupler are connect through optical fiber, the c ports of 2 × 2 fiber coupler connect the first described optical fiber and put
The input of big device, one end of output the first optical fiber of termination of first fiber amplifier, another termination first of the first optical fiber
The input of frequency displacement module, the output of the first frequency displacement module terminate a ports of the one 2 × 2nd coupler, the d of 2 × 2 coupler
Port connects the input of described 1 × N super-intensive Wave decomposing multiplexers, N number of output of 1 × N super-intensive Wave decomposing multiplexers
End connects N number of input port of the photoswitch of described N × 1 respectively, and the output that the light of the N × 1 opens the light terminates the b of the 22 × 2nd coupler
Port, the c ports of the 22 × 2nd coupler connect the input of the second fiber amplifier, the output termination of second fiber amplifier
One end of second optical fiber, the second optical fiber another termination the second frequency displacement module input, the second frequency displacement module output termination
The a ports of 22 × 2nd coupler, the d ports of the 22 × 2nd coupler connect described, the d ports of the 22 × 2nd coupler
The input of 1 × 2N super-intensive solution wavelength division multiplexers is connect, the 2N output end difference for the 1 × 2N super-intensive solution wavelength division multiplexers being somebody's turn to do
Connect 2N input of the photoswitch of described 2N × 1,1 × M beam splitters described in the output termination of the photoswitch of the 2N × 1 it is defeated
Enter the M channel input ports that end connects the photoswitch of M × 1 via length successively in the M roots optical fiber of arithmetic progression；The light of described M × 1
The input of the described photodetector of the output termination of switch, the output control signal of described logic control element respectively with
The control terminal of the photoswitch of the photoswitch of the photoswitch of described N × 1,2N × 1 and M × 1 is connected；
It is small for the insertion of guarantee light wave shift frequency and whole optical link, the long-term maximum changing range of frequency of described laser
In the three dB bandwidth of 1 × N super-intensive solutions wavelength division multiplexer, each passage of 1 × 2N super-intensive solution wavelength division multiplexers；The ultra dense collected explanations or commentaries of 1 × N
Wavelength division multiplexer, the three dB bandwidth of each passage of 1 × 2N super-intensive solution wavelength division multiplexers should be greater than described radio-frequency signal generator production
The phase-locked loop circuit of two times of raw signal frequency, the first frequency displacement module and the second frequency displacement module produces the two of the frequency of RF signals
It is less than 1 × N super-intensive solution wavelength division multiplexers and each passage three dB bandwidth of 1 × 2N super-intensive solution wavelength division multiplexers again.
Described the first frequency displacement module and the second frequency displacement module has identical structure, and composition includes producing radiofrequency signal f
Required phase-locked loop pll module, 90 ° of phase shifters of microwave broadband, double-parallel electro-optic modulator, beam splitter and modulator operating point
Control circuit；The frequency f of radiofrequency signal is equal to 1 × N super-intensive Wave decomposing multiplexers, the multiplexing of 1 × 2N dense wavelength divisions demultiplexer
The spacing of channel frequence, phase-locked loop pll module produce the RF signals that frequency is f, and the RF signals export through 90 ° of electric bridges of microwave broadband
Phase difference be two radio frequency mouths that 90 ° of two-way radiofrequency signal is added to double-parallel electro-optic modulator, beam splitter separates small
Part light is operated in the feedback control signal control modulator working point control electricity of Single Side Band With Carrier holddown as modulator
Road works, and modulator working point control circuit controls three Mach-Zehnder interferometers to work respectively：Two sub- Mach-
Zehnder interferometer works are in minimum point, and father Mach-Zehnder interferometer works are in Linear Points, by electrooptic modulator output
Most light are exported by the larger proportion output port of beam splitter.
Microwave optical fiber delay line of the present invention is passed through using the time-lag action of optical fiber ring retard again by the signal of different loops
The dense wave division multipurpose passage of corresponding different operating wavelength is crossed, different channel conductives is selected by photocontrol switch, you can
Realize different retardation selections.Can be real by the selection control respectively to coarse delay amount, middle retardation and precise delay amount
The now realization of big tuning range, high-precision stepping-in amount.
The time delay value that logic control element inputs according to user, by following three steps computing, and produced according to operation result
Corresponding trigger signal is output to corresponding photoswitch.Calculating process is as follows：
(1) logic control element calculates user's input delay value and the time delay value N τ phases by the first fibre delay line one circle
Remove, obtain business i and remainder t1, described logic control element produces trigger signal, trigger signal triggering institute according to gained business i
The corresponding i passages of photoswitch of the N stated × 1 (such as business triggers the first via ch0 when being 0, and when business be i, triggering i+1 road chi, i=
0,1,2 ..., N-1),
(2) logic control element calculates gained remainder t1 and the time delay by the second fibre delay line one circle in foregoing (1)
Value τ is divided by, and forms business j and remainder t2, and described logic control element produces trigger signal, the trigger signal according to gained business j
Trigger the corresponding j passages of photoswitch of 2N × 1 (for 0 triggering first via ch0, j+1 roads chi, j=0,1,2 ..., 2N-1 are triggered for j).
(3) delay inequality τ/M that logic control element is calculated obtained by (2) step between remainder t2 and each road of the third level is divided by,
Gained business k and remainder t3, the k passages that trigger signal triggers the photoswitch of corresponding M × 1 are exported according to gained business k logic control elements
(for 0 triggering first via ch0, k+1 roads, k=0,1,2 ..., M-1 are triggered for k), it is corresponding to produce trigger signal gating M × 1 photoswitch
Chk passages, gained remainder t3 is the trueness error of the microwave optical fiber delay line.
It is now that the microwave signal of time delay is set by user by the microwave signal of photodetector output.
The features and advantages of the invention：
The present invention combines the long time delay amount selection of the first ring retard of optical fibre delay loop, the middle delay volume choosing of the second ring retard
Select and M roads length selects in the fine delay of arithmetic progression fiber link, it is possible to achieve big tuning range, high-precision stepping
Delay realizes that one embodiment of the present of invention, experiment shows, it is possible to achieve tens ns to tens of ms, stepping accuracy are several ns
Retardation regulation.At present, in the market does not have the high variable delay line product of so big tuning range, stepping accuracy also.
The dense wavelength division demultiplexer of the present invention controls the transmission number of turns that selection can be achieved and need through logic control element, disappears
Influence except the ambient noise that the loop delay number of turns introduces more times and to system other performance；
The delay that the present invention is applicable not only to the RF signals of pulse realizes that the delay for being also applied for continuous RF signals is real
It is existing.
Brief description of the drawings
Fig. 1 is the structure principle chart of microwave optical fiber delay line of the present invention.
Fig. 2 is the frequency displacement modular structure schematic diagram in Fig. 1.
Fig. 3 is the work transmission curve of Mach-Zehnder interferometers in Fig. 2.
Fig. 4 is the logic control flow process figure of system.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings, but should not be limited the scope of the invention with this.
With reference to figure 1, Fig. 1 is the structure principle chart of microwave optical fiber delay line of the present invention, as seen from the figure, microwave optical fiber of the present invention
Delay line, composition include laser 1, rf signal generator 2, electrooptic modulator 3, the first frequency displacement module 4, the first optical fiber 5, the
The photoswitch 9 of one fiber amplifier 6, the one 2 × 2nd coupler 7,1 × N super-intensives Wave decomposing multiplexer 8, N × 1, the second frequency displacement mould
Block 10, the second optical fiber 11, the second fiber amplifier 12, the 22 × 2nd coupler 13,1 × 2N super-intensive solutions wavelength division multiplexer 14,
The photoswitch 18 of the photoswitch 15 of 2N × 1,1 × L beam splitter 16, M × 1, M root optical fiber 17 and photodetection of the length in arithmetic progression
Device 19, formed the first optical fiber by the first frequency displacement module 4, the first optical fiber 5, the first fiber amplifier 6 and the one 2 × 2nd coupler 7 and followed
Ring ring retard, is formed by the second frequency displacement module 10, the second optical fiber 11, the second fiber amplifier 12 and the 22 × 2nd coupler 13
Two optical fiber circulation delay rings；The second described optical fiber circulation delay ring and the structure of the first optical fiber circulation delay ring are identical, described
The second optical fiber 11 length for the first optical fiber 5 length 1/N, N is positive integer；
The optical signal that described laser 1 exports enters the optical signal input mouth of described electrooptic modulator 3, described
The radiofrequency signal port of electrooptic modulator 3 described in the output termination of rf signal generator 2；Described electrooptic modulator 3
Output end connects the b ports of the one 2 × 2nd described coupler 7 through optical fiber, and the c ports of 2 × 2 fiber coupler connect described the
The input of one fiber amplifier 6, one end of output the first optical fiber 5 of termination of first fiber amplifier 6, the first optical fiber 5
The input 4 of the first frequency displacement module of another termination, the output of the first frequency displacement module 4 terminate a ports of the one 2 × 2nd coupler 7,
The d ports of 2 × 2 coupler 7 connect the input of described 1 × N super-intensives Wave decomposing multiplexer 8,1 × N super-intensive wavelength-divisions
N number of output end of demultiplexer 8 connects N number of input port of the photoswitch 9 of described N × 1 respectively, the light of the N × 1 open the light 9 output
The b ports of the 22 × 2nd coupler 13 are terminated, the c ports of the 22 × 2nd coupler 13 connect the input of the second fiber amplifier 12
End, the frequency displacement of another termination second of one end, the second optical fiber 11 of output the second optical fiber 11 of termination of second fiber amplifier 13
The input of module 10, the output of the second frequency displacement module 10 terminate a ports of the 22 × 2nd coupler 13, the 22 × 2nd coupling
The d ports of device 13 connect described, and the d ports of the 22 × 2nd coupler 13 connect the input of 1 × 2N super-intensive solutions wavelength-division multiplex 14
End, 2N output end of the 1 × 2N super-intensive solutions wavelength-division multiplex 14 being somebody's turn to do connect the photoswitch 15 of described 2N × 1 respectively 2N input
End, the inputs of the described 1 × M beam splitters 16 of the output termination of the photoswitch 15 of the 2N × 1 are in the M of arithmetic progression via length
Root optical fiber 17 connects M channel input ports of the photoswitch 18 of M × 1 successively；Described in the output termination of the photoswitch 18 of described M × 1
Photodetector 19 input, the output end of described logic control element 20 respectively with the photoswitch 9 of described N × 1,2N
The control terminal of the photoswitch 18 of × 1 photoswitch 15 and M × 1 is connected；The long-term maximum changing range of frequency of described laser 1 is less than
The three dB bandwidth of 14 each passage of 1 × N super-intensive solutions wavelength division multiplexer 8 and 1 × 2N super-intensive solutions wavelength division multiplexer；1 × N super-intensives
The three dB bandwidth of solution 14 each passage of wavelength division multiplexer 8 and 1 × 2N super-intensive solutions wavelength division multiplexer should be greater than described radiofrequency signal hair
The phase-locked loop circuit 22 of two times of signal frequency caused by raw device 2, the first frequency displacement module 4 and the second frequency displacement module 10 produces RF letters
Number two times of frequency be less than 14 each passage 3dB of 1 × N super-intensive solutions wavelength division multiplexer 8 and 1 × 2N super-intensive solutions wavelength division multiplexer
Bandwidth.
The present invention we select the ultra dense wavelength division multiple device reason to be：Because loop gain is about 1, according to time delay result,
Optical signal can transmit hundreds of circles in the loop, and according to the actual requirements, we only select the delay volume that N is enclosed.Second group of super-intensive
The reason for wavelength-division multiplex is chosen：To ensure the property at equal intervals of each quasi-continuous delay volume spacing, walked for N-1 times by previous group loop
Path ch (N-1) light path maximum delay in the second set need to be N-1 times of second group of the process delay volume of loop one time, because
This second group of ultra dense wavelength division multiple selection 2*N passage.To ensure the fineness of stepping-in amount, we add third level fine delay
Amount regulation part, the foundation of part selection is that the complexity of system is easily achieved and will not be significantly increased in engineering, meanwhile,
It is basic to bring up on the basis of delay tuning range stepping fineness to comprise only the 1/M of above two-layer configuration (M is without changing
The way of beam splitter).
The dense wave division multipurpose passage three dB bandwidth selected in the present invention should be greater than maximum receive RF signal frequencies 2 times, this
Sample just can guarantee that each passage three dB bandwidth for being demultiplexed through the RF signals that electrooptic modulator is modulated on light wave in dense wavelength division it
It is interior.
Cases of design
By taking time delay adjustable extent 30ns~10us as an example, the optical signal that its corresponding modulating has microwave signal need to pass through delay light
Fine total length is as follows using system this described, its each parameter designing from 6m to 2000m：
1 × N super-intensive solutions wavelength division multiplexer selects the wavelength division multiplexer of 1 × 20 passage, 1 × 2N super-intensive solution wavelength-division multiplex
Device selects the wavelength division multiplexer of 1 × 40 passage, the beam splitter of 1 × M beam splitters selection 1 × 8, corresponding photoswitch difference at different levels
For 20 × Isosorbide-5-Nitrae 0 × 1,8 × 1；
① ② ③ ④ ⑤ ⑥
20 τ * 19+ τ * 20+7/8 τ=10000ns
τ=24.945ns
1. 20 τ are the delay enclosed by the first optical fiber one；
2. 19 represent to pass through the first optical fiber 19 times, that is to say, that into the 20th paths (corresponding to last passage)；
3. τ is the delay enclosed by the second optical fiber one；
4. 20 meaning：20th road signal Ch19 (first via Ch0) of the first super-intensive solution wavelength division multiplexer is corresponding
Passage exported by photoswitch to link below, (by the second optical fiber 0 time), corresponding second super-intensive solution wavelength-division is answered when it is straight-through
With the Ch19 of device, if will from finally all the way Ch39 outputs, it is necessary to by the second optical fiber 20 times；
5. 7/8 τ refers to the maximum delay amount of afterbody fine delay；
6. 10000 be the obtained maximum time retardation of user；
Minimum delay interval (minimum step amount) 1/8 τ=3.118ns
The selection of each section of fiber lengths：
First fiber lengths are：
(20*24.945*2*10^ -1)=99.78m
Second fiber lengths are：
(24.945*2*10^ -1)=4.989m
Length is in the length difference of 8 optical fiber of arithmetic progression：
(24.945*2*10^ -1)/8=0.62362m
By taking time delay adjustable extent 10ns~1ms as an example, its corresponding modulating has the optical signal of microwave signal by delay optical fiber
Total length it is as follows from 2m-200000m, the system architecture：
1 × N super-intensive solutions wavelength division multiplexer selects the wavelength division multiplexer of 64 passages, 1 × 2N super-intensive solution wavelength division multiplexers
The wavelength division multiplexer of 128 passages is selected, the beam splitter of 1 × M beam splitters selection 1 × 64, corresponding photoswitch at different levels is respectively 64
× 1,128 × 1,64 × 1；
⑴ ⑵ ⑶ ⑷ ⑸ ⑹
64 τ * 63+ τ * 64+63/64 τ=1000000ns
τ=244.08ns
(1) 64 τ are the delay enclosed by the first optical fiber one；
(2) 63 represent to pass through the first optical fiber 63 times, that is to say, that into the 64th paths (corresponding to last passage)；
(3) τ is the delay enclosed by the second optical fiber one；
(4) 64 meaning：64th road signal Ch63 (first via Ch0) of the first super-intensive solution wavelength division multiplexer is corresponding
Passage exported by photoswitch to link below, (by the second optical fiber 0 time), corresponding second super-intensive solution wavelength-division is answered when it is straight-through
With the Ch63 of device, if will from finally all the way Ch127 outputs, it is necessary to by the second optical fiber 64 times；
(5) 63/64 τ refers to the maximum delay amount of afterbody fine delay；
(6) it is the obtained maximum time retardation of user；
Minimum delay interval (minimum step amount) 1/64 τ=3.815ns
The selection of each section of fiber lengths：
First fiber lengths are：
(64*244.08*2*10^ -1)=3124.22m
Second fiber lengths are：
(244.08*2*10^ -1)=48.816m
Length is in the length difference of 8 optical fiber of arithmetic progression：
(1/64*244.08*2*10^ -1)=0.76275m
Claims (2)
1. a kind of microwave optical fiber delay line, it is characterised by that its composition includes laser (1), rf signal generator (2), electric light and adjusted
Device (3) processed, the first frequency displacement module (4), the first optical fiber (5), the first fiber amplifier (6), the one 2 × 2nd coupler (7), 1 × N
The photoswitch (9) of super-intensive solution wavelength division multiplexer (8), N × 1, the second frequency displacement module (10), the second optical fiber (11), the second optical fiber are put
The photoswitch (15) of big device (12), the 22 × 2nd coupler (13), 1 × 2N super-intensive solution wavelength division multiplexers (14), 2N × 1,1 × M
Beam splitter (16), the photoswitch (18) of M × 1, length be in arithmetic progression M roots optical fiber (17) and photodetector (19), by the
One frequency displacement module (4), the first optical fiber (5), the first fiber amplifier (6) and the one 2 × 2nd coupler (7) form the first optical fiber and followed
Ring ring retard, by the second frequency displacement module (10), the second optical fiber (11), the second fiber amplifier (12) and the 22 × 2nd coupler
(13) the second optical fiber circulation delay ring is formed；The second described optical fiber circulation delay ring and the structure of the first optical fiber circulation delay ring
Identical, the length of described the second optical fiber (11) is the 1/N of the length of the first optical fiber (5), and N is positive integer；
The optical signal of described laser (1) output enters the optical signal input mouth of described electrooptic modulator (3), described
The radiofrequency signal port of electrooptic modulator (3) described in the output termination of rf signal generator (2)；Described electrooptic modulator
(3) output end connects the b ports of the one 2 × 2nd described coupler (7), the c ports of the one 2 × 2nd coupler (7) through optical fiber
The output for connecing the input, first fiber amplifier (6) of described the first fiber amplifier (6) terminates the first optical fiber (5)
One end, the first optical fiber (5) another termination the first frequency displacement module (4) input, the output termination the of the first frequency displacement module (4)
The a ports of one 2 × 2 couplers (7), the d ports of the one 2 × 2nd coupler (7) connect described 1 × N super-intensive solution wavelength-division multiplex
The input of device (8), N number of output ends of 1 × N super-intensive solution wavelength division multiplexers (8) connect the photoswitch (9) of described N × 1 respectively
N number of input port, the open the light output of (9) of the light of the N × 1 terminates the b ports of the 22 × 2nd coupler (13), the 22 × 2nd coupling
The c ports of device (13) connect the input of the second fiber amplifier (12), the output termination second of second fiber amplifier (12)
One end of optical fiber (11), the input of another termination the second frequency displacement module (10) of the second optical fiber (11), the second frequency displacement module
(10) output terminates a ports of the 22 × 2nd coupler (13), and the d ports of the 22 × 2nd coupler (13) meet 1 × 2N and surpassed
The input of intensive solution wavelength division multiplexer (14), 2N output end of 1 × 2N super-intensive solution wavelength division multiplexers (14) connect respectively
2N input of the photoswitch (15) of described 2N × 1, the described 1 × M beam splitters of the output termination of the photoswitch (15) of the 2N × 1
(16) input connects the M passage input of the photoswitch (18) of M × 1 via length successively in the M roots optical fiber (17) of arithmetic progression
Port；The input of the described photodetector (19) of the output termination of the photoswitch (18) of described M × 1, logic control element
(20) output control signal respectively with the photoswitch (18) of the photoswitch (9) of described N × 1, the photoswitch (15) of 2N × 1 and M × 1
Control terminal is connected；The long-term maximum changing range of frequency of described laser (1) is less than 1 × N super-intensive solution wavelength division multiplexers
(8), the three dB bandwidth of 1 × 2N super-intensives solution wavelength division multiplexer (14) each passage；1 × N super-intensive solution wavelength division multiplexers (8), 1 ×
The three dB bandwidth of 2N super-intensive solution wavelength division multiplexer (14) each passage should be greater than believing caused by described rf signal generator (2)
The phase-locked loop circuit (22) of two times of number frequency, the first frequency displacement module (4) and the second frequency displacement module (10) produces the frequency of RF signals
Two times of rate are less than 1 × N super-intensive solution wavelength division multiplexers (8) and each passage 3dB bands of 1 × 2N super-intensive solution wavelength division multiplexers (14)
Width, the gain of described the first fiber amplifier (6) and the second fiber amplifier (12) are 3dB, the ultra dense collected explanations or commentaries of 1 described × N
The top n passage of N number of passage and 1 × 2N super-intensive solution wavelength division multiplexer (14) of wavelength division multiplexer (8) has identical center
Frequency and three dB bandwidth.
2. microwave optical fiber delay line according to claim 1, it is characterised by described the first frequency displacement module (4) and second frequently
Shifting formwork block (10) has an identical structure, forms that to include phase-locked loop pll module (21) needed for generation radiofrequency signal f, microwave wide
90 ° of phase shifters (22) of band, double-parallel electro-optic modulator (23), beam splitter (24) and modulator working point control circuit (25)；
The frequency f of radiofrequency signal is equal to 1 × N super-intensive solution wavelength division multiplexers (8), 1 × 2N super-intensive solution wavelength division multiplexers (14) multiplexing
The spacing of channel frequence, phase-locked loop pll module (21) produce the RF signals that frequency is f, and the RF signals are through 90 ° of phase shifts of microwave broadband
The phase difference of device (22) output is that 90 ° of two-way radiofrequency signal is added to two radio frequency mouths of double-parallel electro-optic modulator (23), light
The fraction light that beam splitter (24) separates is operated in the feedback control signal control of Single Side Band With Carrier holddown as modulator
Modulator working point control circuit (25) works, and modulator working point control circuit (25) controls three Mach-Zehnder interference
Instrument works respectively：Two sub- Mach-Zehnder interferometer works are in minimum point, and father's Mach-Zehnder interferometer works are linear
Point, exported by most light of electrooptic modulator output by the larger proportion output port of beam splitter.
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| CN106452588B (en) * | 2015-08-11 | 2018-11-23 | 清华大学 | A kind of wideband adjustable photon delayer and its delay monitoring method |
| CN105553543B (en) * | 2015-12-24 | 2018-04-24 | 中国电子科技集团公司第四十一研究所 | A kind of coherent light time domain reflection meter calibrating device and method |
| CN108375777A (en) * | 2017-12-28 | 2018-08-07 | 北京东方计量测试研究所 | A kind of optical delay calibration method and system for range-measurement system |
| CN110958032B (en) * | 2019-11-01 | 2021-07-06 | 中国科学院上海光学精密机械研究所 | Radio frequency storage and frequency shift device based on photonics |
| CN111123219A (en) * | 2019-12-27 | 2020-05-08 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Ultra-wideband dense interference signal generation system and method based on optical wavelength division multiplexing |
| CN113433511A (en) * | 2021-06-25 | 2021-09-24 | 中国电子科技集团公司第二十九研究所 | Method and device applied to time difference direction-finding channel precision measurement |
| CN113671212B (en) * | 2021-08-16 | 2022-07-15 | 南京牧镭激光科技有限公司 | Optical path switching channel and switching method for measuring three-dimensional air volume based on DWDM optical switch module, and laser radar |
| CN114296033B (en) * | 2021-12-23 | 2024-02-27 | 中国电子科技集团公司第十四研究所 | Light-operated receiving beam forming method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030815A (en) * | 2007-04-12 | 2007-09-05 | 北京科技大学 | Adjusting and reconfigured microwave photo filter device based on super-continuous spectrum light source |
| CN103532604A (en) * | 2013-09-30 | 2014-01-22 | 上海交通大学 | Programmable beam forming network on basis of optical wavelength division multiplexing technology |
| CN103941235A (en) * | 2014-02-26 | 2014-07-23 | 上海交通大学 | Full-optical-control phased-array radar transmitter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7720226B2 (en) * | 2002-11-19 | 2010-05-18 | Essex Corporation | Private and secure optical communication system using an optical tapped delay line |
-
2014
- 2014-12-16 CN CN201410778021.6A patent/CN104698542B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030815A (en) * | 2007-04-12 | 2007-09-05 | 北京科技大学 | Adjusting and reconfigured microwave photo filter device based on super-continuous spectrum light source |
| CN103532604A (en) * | 2013-09-30 | 2014-01-22 | 上海交通大学 | Programmable beam forming network on basis of optical wavelength division multiplexing technology |
| CN103941235A (en) * | 2014-02-26 | 2014-07-23 | 上海交通大学 | Full-optical-control phased-array radar transmitter |
Non-Patent Citations (1)
| Title |
|---|
| Photonic Radio Frequency Memory Using Frequency Shifting Recirculating Delay Line Structure;Tuan A. Nguyen 等;《JOURNAL OF LIGHTWAVE TECHNOLOGY》;20140101;第32卷(第1期);第99-106页 * |
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