CN204536592U - One step-by-step movement temperature control type fibre delay line time delay - Google Patents
One step-by-step movement temperature control type fibre delay line time delay Download PDFInfo
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- CN204536592U CN204536592U CN201520165738.3U CN201520165738U CN204536592U CN 204536592 U CN204536592 U CN 204536592U CN 201520165738 U CN201520165738 U CN 201520165738U CN 204536592 U CN204536592 U CN 204536592U
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- optical fiber
- temperature control
- control circuit
- time delay
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Abstract
The utility model relates to one step-by-step movement temperature control type fibre delay line time delay, it is characterized in that: it comprises by the optical modulation driver module directly adjusting Distributed Feedback Laser, optoisolator, temperature control circuit, power control circuit and constant-current drive circuit to form; The optical fiber delay distribution network be made up of optical fiber, tap and photoswitch, each optical fiber is end to end successively, and the junction of two adjacent fibers arranges tap, and each tap is all connected with photoswitch; The light-receiving processing module that wideband photodetectors, attenuation type low-noise wide-band amplifier, C8051F410 Chip Microprocessor Temperature control circuit and high frequency filter are formed; In radiofrequency signal input optical modulation driver module, the light signal that rear output is loaded with modulation intelligence is modulated to light signal, the light signal being loaded with modulation intelligence transfers to light-receiving processing module after the time delay of optical fiber delay distribution network, and light-receiving processing module exports after changing the light signal after the time delay received into radiofrequency signal.
Description
Technical field
The utility model relates to a kind of microwave device, particularly about one step-by-step movement temperature control type fibre delay line time delay.
Background technology
In Modern Electronic Countermeasure war, when the other side locates our target with radio frequency reading pulse, we sends the radio-frequency pulse that time delay changes after can processing the other side's radio-frequency pulse received, thus reaches the object of fascination the other side.Simultaneously, require in the work of modern Large Phased Array Radar that the real time delay wave beam realized without deflection, large-angle scanning, wide instant bandwidth work controls, its key link needs radio frequency pulse signal to carry out phase shift, and essentially signal phase shift is here exactly that signal time delay in time domain is slow.
In early time, radio-frequency pulse postpones main use ccd delay line and acousto-optic delay line, has occurred magnetostatic wave lag line and superconducting delay line subsequently.Along with the frequency of operation of signal and widening of bandwidth, the requirement of system to the loss of lag line, time-bandwidth product (TB) is more and more higher, and the performance of above-mentioned various lag lines can not meet the requirement of system gradually.It is extremely low that optical fiber radio frequency lag line has the advantages, particularly unit delay time loss such as bandwidth is high, loss is low, and time delay and the amassing of bandwidth are far longer than ccd delay line and acousto-optic delay line.
Fibre delay line be artificially manufacture certain hour when utilizing light to transmit in a fiber delay to meet the processing demands of signal.As shown in Figure 1, its principle of work is: first, and the radio frequency rf signal of input is loaded on laser instrument LD to be modulated; Secondly, laser instrument produces the laser beam containing load information, and laser beam is by transmitting in light path coupled into optical fibres; Finally, photoelectric detector PD exports after changing radiofrequency signal into through the light signal of optical fiber delay, completes the time delay to input radio frequency RF signal.But mainly there is following shortcoming in existing fibre delay line: 1) mostly adopt single-path optical fiber ring structure, the time delay of the fibre delay line of this structure is fixed, thus greatly limit the application market of fibre delay line; Although the time delay of some fibre delay line is adjustable, but generally it adopts multi-channel optical fibre ring structure, use photo-coupler link relevant light paths, have that optical path loss is large, joint coupling poor stability, small product size are large, be not easy to transport and the problem such as working environment is special.2) optical device of fibre delay line inside and radio frequency electrical device responsive to variation of ambient temperature, its amplitude fluctuations exporting electric signal is comparatively large, larger for the normal work influence of fibre delay line back end device.
Utility model content
In order to solve the problems referred to above that prior art exists, the utility model provides one step-by-step movement temperature control type fibre delay line time delay.
The technical scheme that the utility model adopts is: one step-by-step movement temperature control type fibre delay line time delay, is characterized in that: it comprises optical modulation driver module, optical fiber delay distribution network and light-receiving processing module, described optical modulation driver module comprises directly adjusts Distributed Feedback Laser, optoisolator, temperature control circuit, power control circuit and constant-current drive circuit, described optical fiber delay distribution network comprises N root optical fiber, a N-1 tap and a N and selects a photoswitch, and described in N root, optical fiber is end to end successively, and the junction of two adjacent described optical fiber arranges tap described in, and tap described in each is all connected with described photoswitch, described light-receiving processing module comprises wideband photodetectors, attenuation type low-noise wide-band amplifier, C8051F410 Chip Microprocessor Temperature control circuit and high frequency filter, in the described straight tune Distributed Feedback Laser of radiofrequency signal input, described straight tune Distributed Feedback Laser outgoing laser beam, laser beam enters in described optical fiber delay distribution network by described optoisolator, described optoisolator returns described straight tune Distributed Feedback Laser for preventing the laser beam entering described optical fiber delay distribution network along loop reflection, described temperature control circuit ensures that described straight tune Distributed Feedback Laser normally works, described power control circuit samples the electric current that the photodetector in described straight tune Distributed Feedback Laser detects, described constant-current drive circuit is fed back to after amplification, the drive current of described constant-current drive circuit controls the luminous power of described optical modulation driver module stable output, laser beam all exports the laser beam of set power and time delay in described tap place, and described photoswitch selects wherein a branch of output in the laser beam of some roads, the beam transmission exported is selected after opto-electronic conversion, to export radiofrequency signal to described wideband photodetectors, radiofrequency signal transfers to described high frequency filter after entering and amplifying in described attenuation type low-noise wide-band amplifier, radio-frequency component in described high frequency filter filtering radiofrequency signal, exports the radiofrequency signal postponed, described C8051F410 Chip Microprocessor Temperature control circuit to external world temperature carries out Real-time Collection, and the damping capacity of attenuator in described attenuation type low-noise wide-band amplifier is controlled by the temperature value collected, adjust the enlargement factor of amplifier in described attenuation type low-noise wide-band amplifier.
Described straight tune Distributed Feedback Laser adopts the 1542E broadband internal modulation Distributed Feedback Laser of ORTEL company.
Described temperature control circuit comprises bridge circuit, differential amplifier circuit and push-pull type power tube; Described power control circuit adopts Current Negative Three-Point Capacitance formula power control circuit.
Described optical fiber adopts the G.625 optical fiber of Chang Fei company.
The quantity of described optical fiber is four, and the quantity of described tap is three, and described photoswitch adopts four to select a photoswitch.
Described wideband photodetectors adopts the 2522-SF-DC-SA detector of ORTEL company.
Described attenuation type low-noise wide-band amplifier comprises the fixing low noise amplifier of enlargement factor and controllable attenuator, the low noise amplifier that described enlargement factor is fixed is connected with described controllable attenuator, described controllable attenuator is connected with described C8051F410 single-chip microcomputer, the damping capacity of described C8051F410 Single-chip Controlling controllable attenuator.
Owing to adopting above technical scheme, the utility model has the following advantages: 1, the utility model is owing to being provided with optical modulation driver module, optical fiber delay distribution network and light-receiving processing module, some identical optical fiber are set in optical fiber delay distribution network, each optical fiber is end to end successively, therefore radiofrequency signal input delayed in the utility model after can obtain the radiofrequency signal of different time delay as required, and this time delay is that step-by-step movement is adjustable.2, the utility model owing to being provided with temperature control circuit in optical modulation driver module; For making the luminous power of each tap place outgoing laser beam in optical fiber delay distribution network equal, welding splitting ratio is set in tap place; In light-receiving processing module, arrange C8051F410 Chip Microprocessor Temperature control circuit, the radiofrequency signal that therefore the utility model exports can not by the impact of operating ambient temperature, the power stability of the radiofrequency signal of output.3, the utility model draws cone and fusion joining process to carry out head and the tail welding successively to some optical fiber owing to adopting, and tap is set between two adjacent fibers, therefore the utility model can reduce the physical dimension of optical fiber delay distribution network greatly, is conducive to small-sized encapsulated of the present utility model.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of fibre delay line;
Fig. 2 is the structural representation of the utility model step-by-step movement time delay temperature control type fibre delay line;
Fig. 3 is temperature acquisition, control flow chart in C8051F410 single-chip microcomputer.
In figure: 1, optical modulation driver module; 11, directly Distributed Feedback Laser is adjusted; 12, optoisolator; 13, temperature control circuit; 14, power control circuit; 15, constant-current drive circuit;
2, optical fiber delay distribution network; 21, optical fiber; 22, tap; 23, photoswitch;
3, light-receiving processing module; 31, wideband photodetectors; 32, attenuation type low-noise wide-band amplifier; 33, C8051F410 Chip Microprocessor Temperature control circuit; 34, high frequency filter.
Embodiment
As shown in Figure 2, the utility model provides one step-by-step movement temperature control type fibre delay line time delay, it comprises optical modulation driver module 1, optical fiber delay distribution network 2 and light-receiving processing module 3, in radiofrequency signal input optical modulation driver module 1, the light signal that rear output is loaded with modulation intelligence is modulated to light signal, the light signal being loaded with modulation intelligence transfers to light-receiving processing module 3 after optical fiber delay distribution network 2 time delay, and light-receiving processing module 3 exports after changing the light signal after the time delay received into radiofrequency signal.
Optical modulation driver module 1 comprises directly adjusts DFB (Distributed Feedback, distributed Feedback) laser instrument 11, optoisolator 12, temperature control circuit 13, power control circuit 14 and constant-current drive circuit 15.Optical fiber delay distribution network 2 comprises N root optical fiber 21, a N-1 tap 22 and a N and selects a photoswitch 23.N root optical fiber 21 is end to end successively, and the junction of two adjacent fibers 21 arranges a tap 22, and each tap 22 is all connected with photoswitch 23.Light-receiving processing module 3 comprises wideband photodetectors 31, attenuation type low-noise wide-band amplifier 32, C8051F410 Chip Microprocessor Temperature control circuit 33 and high frequency filter 34.Radiofrequency signal input is straight adjusts in DFB11 laser instrument, modulates through straight Distributed Feedback Laser 11 of adjusting the laser beam exporting certain power.Laser beam is entered in optical fiber delay distribution network 2 by optoisolator 12.Optoisolator 12 returns straight tune Distributed Feedback Laser 11 for preventing the laser beam entering optical fiber delay distribution network 2 along loop reflection, causes damage to straight Distributed Feedback Laser 11 of adjusting.Temperature control circuit 13 ensures directly to adjust Distributed Feedback Laser 11 normally to work, not by the impact of ambient temperature.A part of luminous power of Distributed Feedback Laser 11 is directly adjusted in the built-in backlight photoelectric detector PD real-time detection of straight tune Distributed Feedback Laser 11, power control circuit 14 samples detection electric current, amplify after feed back to constant-current drive circuit 15, the drive current of constant-current drive circuit 15 controls the luminous power of optical modulation driver module 1 stable output.Tap 22 place of laser beam between two adjacent fibers 21 all exports the laser beam of set power and time delay, and photoswitch 22 selects wherein a branch of output in the laser beam of some roads.Select the beam transmission exported in light-receiving processing module 3.Laser beam enters the radiofrequency signal that in wideband photodetectors 31, output power is less after opto-electronic conversion, radiofrequency signal transfers to high frequency filter 34 after entering and amplifying in attenuation type low-noise wide-band amplifier 32, radio-frequency component in high frequency filter 34 filtering radiofrequency signal, exports the radiofrequency signal postponed.C8051F410 Chip Microprocessor Temperature control circuit 33 to external world temperature carries out Real-time Collection, and the damping capacity of attenuator in attenuation type low-noise wide-band amplifier 32 is controlled by the temperature value collected, thus adjust the enlargement factor of amplifier in attenuation type low-noise wide-band amplifier 32, to reach the stable of fibre delay line output power.
Set temperature acquisition module, A/D modular converter, data-carrier store and D/A modular converter in C8051F410 single-chip microcomputer.The analog quantity of temperature collect module Real-time Collection operating ambient temperature also transfers to A/D modular converter, convert to after digital signal through A/D modular converter and transfer to data-carrier store, digital signal transfers to D/A modular converter as calculated afterwards, converts to after simulating signal export through D/A modular converter.This simulating signal is converted to suitable level range, and accesses the adjustable attenuation end of attenuation type low-noise wide-band amplifier 32, is adjusted in real time by the enlargement factor of environment temperature to attenuation type low-noise wide-band amplifier 32.
Before the utility model fibre delay line normally works, need to calibrate place working environment state, temperature information in collecting work temperature range under low temperature, normal temperature, high temperature three kinds of duty conditions, adjustment output voltage is required according to design objective, storage temperature and output parameter state of value, after three kinds of working status parameter complete sampling, C8051F410 single-chip microcomputer is started working, steady with the perseverance relatively realizing the fibre delay line output power in operating temperature range.As shown in Figure 3, the control procedure of C8051F410 single-chip microcomputer comprises:
1) initialization LED glimmers;
2) judge whether to confirm calibration;
If confirm calibration, then temperature collect module gathers current temperature value, performs step 4); If do not confirm calibration, then utilize the temperature digital amount that external test board obtains under-40 °, 25 °, 70 ° respectively, and then the relational expression between the temperature digital amount y that in the low-temperature space calculating-40 ° ~ 25 °, current temperature value x is corresponding with it: y=k
1x+b
1in coefficient k
1and b
1, and the relational expression between the temperature digital amount y that in the high-temperature region of 25 ° ~ 70 °, current temperature value x is corresponding with it: y=k
2x+b
2in coefficient k
2and b
2; Step 2 is returned) after this calibration process terminates;
3) current temperature value that collects is judged whether the low-temperature space of-40 ° ~ 25 °;
If the current temperature value collected is the low-temperature space of-40 ° ~ 25 °, then according to formula: y=k
1x+b
1calculate the temperature digital amount corresponding to Current Temperatures.
If the current temperature value collected is not the low-temperature space of-40 ° ~ 25 °, the high-temperature region of 25 ° ~ 70 °, then according to formula: y=k
2x+b
2calculate the temperature digital amount corresponding to Current Temperatures.
5) D/A modular converter exports after converting temperature digital amount to simulating signal.
In a preferred embodiment, straight tune Distributed Feedback Laser 11 adopts 1542E broadband (100MHz ~ 22GHz) the internal modulation Distributed Feedback Laser of ORTEL company, its threshold current >=25mA, maximum input electric power can reach 20dBm, and maximum Output optical power can reach 9dBm.Compared with the light path externally modulated laser of similar technique index, the butterfly encapsulation of this model internal modulated laser has the advantages that structure is simple, volume is little, is convenient to the miniaturization of fibre delay line entirety.1542E laser instrument inner integrated thermistor, semiconductor thermoelectric refrigeration device (TEC), adopt driving circuit to form linear drive mode by the high-power darlington pipe that two are recommended and carry out freezing, heating.
In a preferred embodiment, temperature control circuit 13 mainly comprises bridge circuit, differential amplifier circuit and push-pull type power tube three part, simple, the convenient debugging of structure.Simultaneously in order to ensure laser instrument constant optical power, power control circuit 14 adopts Current Negative Three-Point Capacitance formula power control circuit, by the Output optical power of the photoelectric detector PD Real-Time Monitoring laser instrument of laser instrument inside, the drive current of laser instrument is adjusted in real time through comparator circuit, decision circuitry, thus reach adjustment Output optical power, make the Output optical power of laser instrument keep stable.
In a preferred embodiment, optical fiber 21 adopts the G.625 optical fiber of four Gen Changfei companies, and this type optical fiber is kept to 0.25dB/Km at the unit light decay at wavelength 1550nm place, and light loss is lower.The length of every root G.625 optical fiber is 1km, four G.625 optical fiber by draw cone and fusion joining process successively head and the tail weld, G.625 two adjacent arranges a tap 22 between optical fiber, photoswitch 23 adopts four to select a photoswitch, and each tap 22 all selects a photoswitch to be connected with four.For the luminous power of each tap place outgoing laser beam of access band photodetector 31 is equal after ensureing to select a photoswitch to select through four, the splitting ratio at three tap 22 places is set as successively: n1=1:3.368, n2=1:2.181, n3=1:1.059.The time delay of four optical fiber 21 is respectively Δ t, 2 Δ t, 3 Δ t and 4 Δ t.Welding splitting ratio is set by calculated value n1, n2, n3 of splitting ratio, the light output of the luminous powers such as realization at each fiber optic tap 22 place.The optical fiber delay distribution network that profit realizes in this way comparatively other types optical fiber delay distribution network reduces physical dimension greatly, is conducive to the small-sized encapsulated of whole product.Four select a photoswitch 23 and the IO port communication of C8051F410 single-chip microcomputer in C8051F410 Chip Microprocessor Temperature control circuit 33, complete the gating function to light path, improve the intelligent selection of fibre delay line time delay.
In a preferred embodiment, wideband photodetectors 31 adopts the 2522-SF-DC-SA detector of ORTEL company.
In a preferred embodiment, attenuation type low-noise wide-band amplifier 32 is formed primarily of the fixing low noise amplifier of enlargement factor and controllable attenuator, the low noise amplifier that enlargement factor is fixed is connected with controllable attenuator, controllable attenuator is connected with C8051F410 single-chip microcomputer, the damping capacity of C8051F410 Single-chip Controlling controllable attenuator, thus the enlargement factor realizing attenuation type low-noise wide-band amplifier 32 is adjustable.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection domain of the present utility model.
Claims (7)
1. time delay a step-by-step movement temperature control type fibre delay line, it is characterized in that: it comprises optical modulation driver module, optical fiber delay distribution network and light-receiving processing module, described optical modulation driver module comprises directly adjusts Distributed Feedback Laser, optoisolator, temperature control circuit, power control circuit and constant-current drive circuit, described optical fiber delay distribution network comprises N root optical fiber, a N-1 tap and a N and selects a photoswitch, and described in N root, optical fiber is end to end successively, and the junction of two adjacent described optical fiber arranges tap described in, and tap described in each is all connected with described photoswitch, described light-receiving processing module comprises wideband photodetectors, attenuation type low-noise wide-band amplifier, C8051F410 Chip Microprocessor Temperature control circuit and high frequency filter, in the described straight tune Distributed Feedback Laser of radiofrequency signal input, described straight tune Distributed Feedback Laser outgoing laser beam, laser beam enters in described optical fiber delay distribution network by described optoisolator, described optoisolator returns described straight tune Distributed Feedback Laser for preventing the laser beam entering described optical fiber delay distribution network along loop reflection, described temperature control circuit ensures that described straight tune Distributed Feedback Laser normally works, described power control circuit samples the electric current that the photodetector in described straight tune Distributed Feedback Laser detects, described constant-current drive circuit is fed back to after amplification, the drive current of described constant-current drive circuit controls the luminous power of described optical modulation driver module stable output, laser beam all exports the laser beam of set power and time delay in described tap place, and described photoswitch selects wherein a branch of output in the laser beam of some roads, the beam transmission exported is selected to export radiofrequency signal to described wideband photodetectors, radiofrequency signal transfers to described high frequency filter after entering and amplifying in described attenuation type low-noise wide-band amplifier, radio-frequency component in described high frequency filter filtering radiofrequency signal, exports the radiofrequency signal postponed, described C8051F410 Chip Microprocessor Temperature control circuit to external world temperature carries out Real-time Collection, and the damping capacity of attenuator in described attenuation type low-noise wide-band amplifier is controlled by the temperature value collected, adjust the enlargement factor of amplifier in described attenuation type low-noise wide-band amplifier.
2. one step-by-step movement temperature control type fibre delay line time delay according to claim 1, is characterized in that: described straight tune Distributed Feedback Laser adopts the 1542E broadband internal modulation Distributed Feedback Laser of ORTEL company.
3. one step-by-step movement temperature control type fibre delay line time delay according to claim 1 and 2, is characterized in that: described temperature control circuit comprises bridge circuit, differential amplifier circuit and push-pull type power tube; Described power control circuit adopts Current Negative Three-Point Capacitance formula power control circuit.
4. one step-by-step movement temperature control type fibre delay line time delay according to claim 1 and 2, is characterized in that: described optical fiber adopts the G.625 optical fiber of Chang Fei company.
5. one step-by-step movement temperature control type fibre delay line time delay according to claim 1 and 2, it is characterized in that: the quantity of described optical fiber is four, the quantity of described tap is three, and described photoswitch adopts four to select a photoswitch.
6. one step-by-step movement temperature control type fibre delay line time delay according to claim 1 and 2, is characterized in that: described wideband photodetectors adopts the 2522-SF-DC-SA detector of ORTEL company.
7. one step-by-step movement temperature control type fibre delay line time delay according to claim 1 and 2, it is characterized in that: described attenuation type low-noise wide-band amplifier comprises the fixing low noise amplifier of enlargement factor and controllable attenuator, the low noise amplifier that described enlargement factor is fixed is connected with described controllable attenuator, described controllable attenuator is connected with described C8051F410 single-chip microcomputer, the damping capacity of described C8051F410 Single-chip Controlling controllable attenuator.
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|---|---|---|---|
| CN201520165738.3U CN204536592U (en) | 2015-03-20 | 2015-03-20 | One step-by-step movement temperature control type fibre delay line time delay |
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| CN201520165738.3U CN204536592U (en) | 2015-03-20 | 2015-03-20 | One step-by-step movement temperature control type fibre delay line time delay |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800485A (en) * | 2016-08-30 | 2018-03-13 | 成都芯瑞科技股份有限公司 | Light carries radio frequency analog transmission signal transceiver |
| CN107947859A (en) * | 2017-12-12 | 2018-04-20 | 北京无线电计量测试研究所 | A kind of optical fiber transmission delay compensation device and system |
| CN110708617A (en) * | 2019-10-10 | 2020-01-17 | 江苏奥雷光电有限公司 | Calibration method for binary tree type four-level eight-node optical switch control parameters |
| CN113820691A (en) * | 2021-08-17 | 2021-12-21 | 厦门彼格科技有限公司 | High-precision optical delay phase regulation and control method with optical amplification |
-
2015
- 2015-03-20 CN CN201520165738.3U patent/CN204536592U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800485A (en) * | 2016-08-30 | 2018-03-13 | 成都芯瑞科技股份有限公司 | Light carries radio frequency analog transmission signal transceiver |
| CN107947859A (en) * | 2017-12-12 | 2018-04-20 | 北京无线电计量测试研究所 | A kind of optical fiber transmission delay compensation device and system |
| CN110708617A (en) * | 2019-10-10 | 2020-01-17 | 江苏奥雷光电有限公司 | Calibration method for binary tree type four-level eight-node optical switch control parameters |
| CN110708617B (en) * | 2019-10-10 | 2022-01-04 | 江苏奥雷光电有限公司 | Calibration method for binary tree type four-level eight-node optical switch control parameters |
| CN113820691A (en) * | 2021-08-17 | 2021-12-21 | 厦门彼格科技有限公司 | High-precision optical delay phase regulation and control method with optical amplification |
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Granted publication date: 20150805 Termination date: 20180320 |