CN207382318U - A kind of millimeter wave optical fiber stepping delay component - Google Patents
A kind of millimeter wave optical fiber stepping delay component Download PDFInfo
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- CN207382318U CN207382318U CN201721509317.3U CN201721509317U CN207382318U CN 207382318 U CN207382318 U CN 207382318U CN 201721509317 U CN201721509317 U CN 201721509317U CN 207382318 U CN207382318 U CN 207382318U
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- photoswitch
- optical fiber
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- wave optical
- delay component
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Abstract
The utility model is related to detector field, more particularly to a kind of millimeter wave optical fiber stepping delay component.Compared with prior art, a kind of millimeter wave optical fiber stepping delay component of the utility model, mainly include light emitting unit, light time delay network unit, light receiving unit, by way of hybrid optoelectronic integration, the broadband millimeter generation of delaying state of the steppings such as seven of signal and switching at high speed for free position grade are completed, improves delay time error precision, reduces noise, Insertion Loss is reduced, ensures stability.
Description
Technical field
The utility model is related to millimeter wave delay transport field, more particularly to a kind of millimeter wave optical fiber stepping delay group
Part.
Background technology
At present, more and more extensive to the application of millimeter wave optical fiber delay transport, the requirement to stepping delay is also more and more smart
Really, the existing transmission used at present can only be exported individually, it is impossible to quickly arbitrarily cut millimeter-wave signal under stepping delay state
Output is changed, can not ensure the accurate stepping-in amount of output, and wants to meet these requirements, and the shakiness in transmission process can be caused
It is fixed, the effect of power and temperature can not be automatically controlled, do not freeze and heat, it can not ensure the stability of the optical wavelength of output,
Entire transmission process can cause substantial amounts of radio frequency loss, influence laser propagation effect.
Utility model content
Shortcoming in for the above-mentioned prior art, the utility model are intended to provide a kind of millimeter wave optical fiber stepping delay
Component, by entire stepping be delayed component miniaturization while ensure stepping-in amount it is accurate, it is complete by way of hybrid optoelectronic integration
Generation and free position into the step delays states such as seven of broadband millimeter-wave signal switch at high speed output, ensure the steady of transmission
Determine row and accuracy, radio frequency loss is minimized.
To achieve the above object, the technical solution of the utility model：
A kind of millimeter wave optical fiber stepping delay component, including sequentially connected light emitting unit, light time delay network unit, light
Receiving unit, the smooth time delay network unit include 1 × 2 photoswitch, 2 × 2 photoswitches, Transmission Fibers, wherein,
1 × 2 photoswitch is arranged to two, respectively the one 1 × 2nd photoswitch, the 21 × 2nd photoswitch, and described 2 × 2
Photoswitch is arranged to multiple, and the light emitting unit output terminal connects the one 1 × 2nd photoswitch, and the one 1 × 2nd light is opened
Pass, multiple 2 × 2 photoswitches, the 21 × 2nd photoswitch pass sequentially through Transmission Fibers described in multistage and connect, multiple transmission
Optical fiber is 28.57 × 2 along the optical signal transmission direction of the light emitting unit successively lengthn-1Ps, wherein n are current paragraph number,
21 × 2nd photoswitch connects the light receiving unit input terminal.
The beneficial effects of the utility model：Compared with prior art, a kind of millimeter wave optical fiber stepping delay of the utility model
Component sets automatic power control circuit, automatic temperature controlling circuit, realizes to Power auto-adjustment function, to chip temperature
Auto-adjustment control function ensures stability, and bias circuit is set to ensure the quality of output signal at different ambient temperatures all
It is controllable, modulator stable is made to work, using different brackets Transmission Fibers realize requirement etc. stepping-in amount delay transport.
Description of the drawings
Fig. 1 is the component structure diagram of the utility model.
1- light emitting units in attached drawing；2- light time delay network units；3- light receiving units；101- lasers；102- electric light
Modulator；103- sender units；The one 1 × 2nd photoswitches of 201-；The photoswitch of 202-2 × 2；203- Transmission Fibers；204-
21 × 2nd photoswitch；301- photodetectors；302-LNA；303- signal output ports.
Specific embodiment
The utility model is further described with reference to specific embodiment and attached drawing.
As shown in Figure 1, a kind of millimeter wave optical fiber stepping delay component of the utility model, including including sequentially connected light hair
Unit 1, light time delay network unit 2, light receiving unit 3 are penetrated, the smooth time delay network unit 2 includes 1 × 2 photoswitch, 2 × 2 light
Switch 202, Transmission Fibers 203, wherein,
1 × 2 photoswitch is arranged to two, respectively the one 1 × 2nd photoswitch 201, the 21 × 2nd photoswitch 204, institute
It states 2 × 2 photoswitches 202 and is arranged to multiple, 1 output terminal of light emitting unit connects the one 1 × 2nd photoswitch 201, described
One 1 × 2nd photoswitch 201, multiple 2 × 2 photoswitches 202, the 21 × 2nd photoswitch 204 pass sequentially through transmission described in multistage
Optical fiber 203 connects, and along the optical signal transmission direction of the light emitting unit 1, length is multiple Transmission Fibers 203 successively
28.57×2n-1Ps, wherein n are current paragraph number, and the 21 × 2nd photoswitch 201 connects the light receiving unit 3 and inputs
End, wherein Ps are time delay precision unit, define time delay in units of ns, are then 1/10ns, i.e. 100Ps.
Further, the light emitting unit 1 includes laser 101, electrooptic modulator 102, sender unit 103,
101 output terminal of laser connects 102 first input end of electrooptic modulator, and 102 output terminal of electrooptic modulator connects
The one 1 × 2nd photoswitch 201 is connect, the sender unit 103 connects 102 second input terminal of electrooptic modulator,
In, to ensure the quality of modulated signal, laser uses high-power, low noise Distributed Feedback Laser, and electrooptic modulator uses undershoot
Damage, the LiNbO3 electrooptic modulators of low half-wave voltage.
Further, the light receiving unit 3 includes photodetector 301, LNA302, signal output port 303, institute
It states 301 output terminal of photodetector and connects the LNA302 input terminals, the LNA302 output terminals connect the signal output part
Mouth 303, i.e. light receiving unit 3 is made of photodetector and low noise, and photodetector is responsible for will be by the optical signal of delay
Electric signal is demodulated into, low noise is responsible for compensating the radio frequency loss that photoelectricity/electro-optic conversion and light path Insertion Loss are brought, and makes entire link
Radio frequency insertion loss is not more than 3dB.
Further, 2 × 2 photoswitch 202 is arranged to six, therefore can realize 128 kinds of combinations, i.e., to defeated
The steppings delay states such as the millimeter-wave signal progress 7bit (128 state) entered are switched fast output.
Further, in light time delay network unit 2 by 21 × 2 photoswitches and 62 × 2 photoswitches and 7 segment length not
Deng optical fiber form, with ensure realize 128 kinds of (7bit) delay states switching.Wherein photoswitch 1 be 1 × 2 photoswitch, light
Switch 2 is 2 × 2 photoswitch, there is the optical fiber that two sections of delay inequalities are 28.57ps between them；Between photoswitch 2 and photoswitch 3
The optical fiber for having two sections of delay inequalities to be 28.57 × 21=57.14ps, has two sections of delay inequalities to be between photoswitch 3 and photoswitch 4
The optical fiber of 28.57 × 22=114.28ps and so on；Have between photoswitch 7 and photoswitch 8 two sections of delay inequalities for 28.57 ×
The optical fiber of 26=1828.48ps so ensures that the stepping-in amount of the 28.57ps of system requirements.
Further, the laser 101 is equipped with automatic power control circuit plate, automatic temperature controlling circuit plate.Wherein,
The automatic power control circuit plate, backwards to the luminous power exported, the detector being internally integrated through laser detects laser
To photoelectric current, electric current is changed into corresponding voltage signal by the trans-impedance amplifier that operational amplifier is formed, voltage signal passes through
Inverting amplifier carries out reverse phase conversion, obtains the signal with phase with reference voltage, and difference amplifier is by the voltage signal and benchmark
Voltage carries out application condition amplification, is sent into the constant-current source being made of transistor, the driving electricity of constant-current source negative-feedback regu- lation laser
It flows to reach stability contorting optical output power of laser.
The automatic temperature controlling circuit plate, the output wavelength of laser can with the variation of chip of laser operating temperature and
Variation, therefore be integrated with TEC in laser and chip of laser is controlled into trip temperature, to ensure the steady of laser output wavelength
Fixed, automatic temperature controlling circuit by the variation of chip of laser temperature by the electric bridge that thermistor is formed by being converted to electric current
Variation so as to which the TEC chips integrated in laser be driven to carry out accordingly freezing and heating to chip of laser, keeps laser
The stabilization of chip temperature, so as to keep the stabilization of output light wavelength.
Further, the electrooptic modulator 102 is equipped with bias circuit controller, due to LiNbO3 luminous intensities used
Modulator is the principle of interferometer, and the difference of the upper and lower two-arm phase difference of interferometer interferes the optical signal of output also just to differ, and
Voltage in actual engineer application corresponding to the offset operation point of modulator is not changeless, in different environment
At a temperature of, the modulated response curve of modulator can drift about, if adding a fixed bias voltage to modulator, modulator is certainly
To violent variation occur under different environment temperatures for the working condition of body, it is therefore necessary to which the bias of modulator is controlled
System, because when modulator is operated in quadrature bias point, the average light power of output is the half of maximum transmitted point Output optical power；
Therefore the modulator Output optical power fed back by the photodetector integrated in modulator, with default half-power reference point
It is compared, by feedback control modulator stable can be made to be operated in quadrature bias point.
Further, the 103 output signal frequency 30-40GHz of sender unit, makes entire operating frequency range exist
30-40GHz ensures instant bandwidth 8GHz.
The technical solution provided above the utility model embodiment is described in detail, used herein specifically
A example is set forth the principle and embodiment of the utility model embodiment, and the explanation of above example is only applicable to help
Assistant solves the principle of the utility model embodiment；Meanwhile for those of ordinary skill in the art, implement according to the utility model
Example, the there will be changes in specific embodiment and application range, in conclusion this specification content should not be construed as
Limitation to the utility model.
Claims (7)
- The component 1. a kind of millimeter wave optical fiber stepping is delayed, it is characterised in that：Prolong including sequentially connected light emitting unit (1), light When network element (2), light receiving unit (3), the smooth time delay network unit (2) include 1 × 2 photoswitch, 2 × 2 photoswitches (202), Transmission Fibers (203), wherein,1 × 2 photoswitch is arranged to two, respectively the one 1 × 2nd photoswitch (201), the 21 × 2nd photoswitch (204), institute It states 2 × 2 photoswitches (202) and is arranged to multiple, light emitting unit (1) output terminal connects the one 1 × 2nd photoswitch (201), the one 1 × 2nd photoswitch (201), multiple 2 × 2 photoswitches (202), the 21 × 2nd photoswitch (204) be successively It is connected by Transmission Fibers described in multistage (203), multiple Transmission Fibers (203) are believed along the light of the light emitting unit (1) Length is 28.57 × 2 successively for number transmission directionn-1Ps, wherein n are current paragraph number, and the 21 × 2nd photoswitch (201) is even Connect the light receiving unit (3) input terminal.
- A kind of 2. millimeter wave optical fiber stepping delay component as described in claim 1, which is characterized in that the light emitting unit (1) laser (101), electrooptic modulator (102), sender unit (103) are included, laser (101) output terminal connects The electrooptic modulator (102) first input end is connect, electrooptic modulator (102) output terminal connects the one 1 × 2nd light and opens It closes (201), the sender unit (103) connects (102) second input terminal of electrooptic modulator.
- A kind of 3. millimeter wave optical fiber stepping delay component as described in claim 1, which is characterized in that the light receiving unit (3) photodetector (301), LNA (302), signal output port (303) are included, photodetector (301) output terminal connects The LNA (302) input terminal is connect, LNA (302) output terminal connects the signal output port (303).
- A kind of 4. millimeter wave optical fiber stepping delay component as described in claim 1, which is characterized in that 2 × 2 photoswitch (202) six are arranged to.
- A kind of 5. millimeter wave optical fiber stepping delay component as claimed in claim 2, which is characterized in that the laser (101) Equipped with automatic power control circuit plate, automatic temperature controlling circuit plate.
- A kind of 6. millimeter wave optical fiber stepping delay component as claimed in claim 2, which is characterized in that the electrooptic modulator (102) it is equipped with bias circuit controller.
- A kind of 7. millimeter wave optical fiber stepping delay component as claimed in claim 2, which is characterized in that the sender unit (103) output signal frequency is 30-40GHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721509317.3U CN207382318U (en) | 2017-11-13 | 2017-11-13 | A kind of millimeter wave optical fiber stepping delay component |
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| CN201721509317.3U CN207382318U (en) | 2017-11-13 | 2017-11-13 | A kind of millimeter wave optical fiber stepping delay component |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510665A (en) * | 2018-12-05 | 2019-03-22 | 中航光电科技股份有限公司 | A kind of adjustable delay combination optical transmission system of ultra wide band |
| CN114552373A (en) * | 2022-02-23 | 2022-05-27 | 腾景科技股份有限公司 | DFB seed source circuit design method with stable wavelength and stable power |
-
2017
- 2017-11-13 CN CN201721509317.3U patent/CN207382318U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510665A (en) * | 2018-12-05 | 2019-03-22 | 中航光电科技股份有限公司 | A kind of adjustable delay combination optical transmission system of ultra wide band |
| CN114552373A (en) * | 2022-02-23 | 2022-05-27 | 腾景科技股份有限公司 | DFB seed source circuit design method with stable wavelength and stable power |
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