CN109633821A - A kind of preparation method and microwave photon filter of microcavity coupled system - Google Patents
A kind of preparation method and microwave photon filter of microcavity coupled system Download PDFInfo
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- CN109633821A CN109633821A CN201811581230.6A CN201811581230A CN109633821A CN 109633821 A CN109633821 A CN 109633821A CN 201811581230 A CN201811581230 A CN 201811581230A CN 109633821 A CN109633821 A CN 109633821A
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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
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/011—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour in optical waveguides, not otherwise provided for in this subclass
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0121—Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
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Abstract
The invention discloses a kind of microwave photon filters, comprising: radio frequency amplifier, erbium-doped fiber amplifier, variable optical attenuator, microcavity coupled system, spectroanalysis instrument, photodetector；The narrow linewidth light carrier that tunable laser issues is after Polarization Controller, double-side band light wave is modulated by DP-MZM, the optical power that double-side band light wave enters the double-side band light wave of microcavity coupled system after erbium-doped fiber amplifier amplifies, by the way that optical attenuator control is adjusted；The optical signal of microcavity coupled system output is divided into two-way, enters the spectroanalysis instrument of the side information for real-time monitoring optical signal all the way, and another way enters the VNA for monitoring the radio-frequency spectrum of optical signal after passing through photodetector；VNA exports radiofrequency signal simultaneously, and the radiofrequency signal of output is loaded on DP-MZM after radio frequency amplifier by orthogonal mixer, realizes the modulation of sideband.Wherein, microcavity coupled system is obtained in the way of the cone area that micro-sphere structure is fitted in the second conical fiber in a manner of overcoupling.
Description
Technical field
The present invention relates to micronano optical device arts, and in particular to the preparation method of a kind of microcavity coupled system and micro-
Glistening light of waves subfilter.
Background technique
Most of traditional microwave photon filter is based on fiber nonlinear effect, such as parameter amplification and frequency translation
Etc. realizing.It is limited to the structure and performance of optical fibre device, most of this kind of microwave photon filter bandwidth is still not narrow enough.Closely
Over a little years, since optical microcavity theoretically has high quality factor, it is easier to obtain the optical mode of pole narrow linewidth, be based on
The optical device of micro-cavity structure causes extensive concern, therefore many microwave photon filtering based on micro-cavity structure also occurs
Device.Compared to traditional microwave photon filter, the microwave photon filter based on micro-cavity structure have it is simple and light, more
It is easily achieved the integrated feature of miniaturization；Simultaneously because micro-cavity structure have high quality factor and good thermal tuning with
Electric tuning ability, the microwave photon filter based on micro-cavity structure, which can be realized narrower filtering bandwidth and have, preferably may be used
Tuning performance and reconfigurability.Currently used micro-cavity structure has micro-loop chamber, photonic crystal chamber, micro- disk chamber and Microsphere Cavities etc.,
Mainly the signal processing in area of light is carried out to realize the function of microwave photon filter using the Whispering-gallery-mode of these microcavitys
Energy.The quality factor (Q value) of microcavity determines the line width of mode of resonance and then influences the bandwidth of filter；Free Spectral Range
(FSR) it has reacted the gap size of two neighboring modes and then has determined the frequency tuning capabilities of filter.Therefore the quality of microcavity
The factor, Free Spectral Range become the important indicator parameter for determining performance of filter.Liu Y et al. is once in paper " Tunable
megahertz bandwidth microwave photonic notch filter based on a silica
Microsphere cavity, " Opt.Lett.41 (21), 5078-5081 (2016) is middle to propose that the high q-factor based on Microsphere Cavities is real
The now microwave photon filter function of pole narrow linewidth.But due to the difficulty of processing technology, the limitation of material loss, coupling condition
Harshness, the Q value of microcavity is difficult to further increase at present, therefore is mostly based on the bandwidth of microcavity filter still in girz
GHz rank, what inhibition can not be stable than also reaches higher level, and processing and making process is also complex.Therefore, it is badly in need of in industry
A kind of high microwave photon filter for inhibiting ratio, ultra-narrow bandwidth, low-complexity and high stability based on microcavity is researched and developed, it will be
Microwave photon field of signal processing has important practical application.
Summary of the invention
The purpose of the invention is to overcome above the shortcomings of the prior art, a kind of microcavity coupled system is provided
Preparation method.
It is another object of the present invention to provide a kind of microwave photon filter to overcome above the shortcomings of the prior art
Wave device.
The purpose of the present invention is realized by the following technical solution:
A kind of preparation method of microcavity coupled system, comprising:
S1 draws the first conical fiber that the area a Gen Zhui diameter is 10-20 microns by micro optical fiber prick-drawing device, by first
Conical fiber is truncated from centre, obtains the optical fiber pointed cone 203 that tip diameter is 10-20 microns；
S2 draws second conical fiber for microcavity coupling, second taper by micro optical fiber prick-drawing device
Optical fiber is single mode；
S3 melts the optical fiber pointed cone of the first conical fiber and in surface tension using carbon dioxide laser working apparatus
Micro-sphere structure 3101 is formed under effect；
The micro-sphere structure 3101 is fitted in the cone area 3102 of the second conical fiber in a manner of overcoupling, obtained micro- by S4
Chamber coupled system 310.
In the present embodiment, the micro optical fiber prick-drawing device include Distributed Feedback Laser 101,107, two, dielectric displacement platform it is identical
Dielectric displacement sliding block 102, two with the first fiber clamps 103, data collecting card 110, the first computer 109, dielectric displacement it is flat
Platform controller 108 and oxyhydrogen flame high temperature spray gun 106 for being heated to single mode optical fiber；Wherein described two dielectric displacement sliding blocks
102 are mounted on the guide rail of dielectric displacement platform 107, control of described two dielectric displacement sliding blocks 102 in dielectric displacement platform controller 108
It is moved under system along guide rail, the dielectric displacement sliding block 102 is connected with dielectric displacement platform controller 108；102 on each potentiometer sliding block
It is mounted on a fiber clamp；Oxyhydrogen flame high temperature spray gun 106 is mounted on dielectric displacement platform 107 and is located at two dielectric displacement and slides
Between block 102；The single mode optical fiber of cone to be drawn is fixed with the first fiber clamp 103；The single mode optical fiber 104 1 of cone to be drawn terminates DFB
Laser 101, another termination data collecting card 110, data collecting card 110 are also connected with the first computer 109.
In the present embodiment, step S1 includes: that the single mode optical fiber of cone to be drawn is placed in optical fiber to draw on frustum, and with the first light
Fine fixture 103 is fixed；Oxyhydrogen flame high temperature spray gun 106 is placed on the center of two fiber clamps, and single mode optical fiber is carried out
Heating；The moving distance of dielectric displacement sliding block is inputted at computer 108, dielectric displacement platform controller 108 receives the first computer
After 109 move, controlling potential moves the mobile drawing cone for carrying out optical fiber of sliding block 102, and obtaining tip diameter is 10-20 microns
Optical fiber pointed cone 203.
In the present embodiment, step S2 further include: the output power of 110 real-time monitoring single mode optical fiber 104 of data collecting card
Variation；When data collecting card 110 monitors that the output of single mode optical fiber 104 is single mode, the second conical fiber is obtained.
In the present embodiment, the carbon dioxide laser working apparatus include laser shutter 201, the second fiber clamp 202,
CCD204, three-dimensional adjustable shelf 205, zinc selenide lens 206, He-Ne laser 207, second computer 208, carbon dioxide laser
209；Second fiber clamp 202 is fixed on three-dimensional adjustable shelf 205, and He-Ne laser 207 is used for carbon dioxide laser 209
The carbon dioxide laser of output is calibrated and is positioned, and zinc selenide lens 206 are for being focused carbon dioxide laser, laser
Baffle 201 is used to receive the laser penetrated, and CCD and second computer 208 connect, and CCD is used to monitor the shape of microballoon.
In the present embodiment, step S3 includes: that the optical fiber of 203 tail end of optical fiber pointed cone is fixed on the second fiber clamp 202,
Adjust the tip that three-dimensional adjustable shelf 205 makes laser facula be located at optical fiber pointed cone 203；Adjust laser power and fine tuning optical fiber pointed cone
Position, make optical fiber pointed cone melt；The optical fiber pointed cone of melting just can form micro-sphere structure 3101 under the action of surface tension.
In the present embodiment, the tip diameter of the optical fiber pointed cone 203 is 10-20 microns.
Another object of the present invention is realized by the following technical solution:
A kind of microwave photon filter, comprising: tunable laser 301, vector network analyzer 302, Polarization Controller
303, DP-MZM304, orthogonal mixer 305, radio frequency amplifier 306, erbium-doped fiber amplifier 307, variable optical attenuator
308, above-mentioned microcavity coupled system 310, spectroanalysis instrument 309 and photodetector 311；What tunable laser 301 issued
Narrow linewidth light carrier is modulated into double-side band light wave after Polarization Controller 303, by DP-MZM304, and double-side band light wave is by mixing
After doped fiber amplifier 307 amplifies, enter the bilateral of microcavity coupled system 310 by the way that the control of optical attenuator 308 is adjusted
Optical power with light wave；The optical signal that microcavity coupled system 310 exports is divided into two-way, enters be used for real-time monitoring optical signal all the way
Side information spectroanalysis instrument 309, another way enters radio-frequency spectrum for monitoring optical signal after passing through photodetector 311
VNA302；VNA302 exports radiofrequency signal simultaneously, and the radiofrequency signal of output passes through orthogonal mixing after radio frequency amplifier 306
Device 305 is loaded on DP-MZM304, realizes the modulation of sideband.
The present invention has the advantage that compared with the existing technology
(1) the microcavity coupled system preparation process of this programme is simple, and processing cost is low, and producing efficiency is higher, repeatability compared with
By force.Single mode optical fiber pointed cone is being processed into the scheme of fiber optic microsphere chamber, it is only necessary to change the diameter of optical fiber pointed cone, rationally control
The power of laser and focal position can process the Microsphere Cavities with the very high quality factor.This is compared to traditional piece
For upper waveguide lithography, the complexity of operation is greatly simplified, and due to the intrinsic property of microballoon cavity configuration, it is larger
Raising microcavity quality factor.Simultaneously in process, due to the monitoring of CCD, it can monitor and adjust in real time processing
Technique.
(2) the microcavity coupled system stability of this programme is high, and external interference resistance is strong.In Microsphere Cavities micro-sphere structure 3101
Coupling in, what is taken is the method for bonded type overcoupling, and microcavity and conical fiber are closely attached together when coupling, this
Method can introduce some losses to a certain extent, but the quality factor high due to Microsphere Cavities itself, this partition losses shadow
It rings and little, the firm coupling process simultaneously bonded can make entire coupled system more stable, to extraneous environmental perturbation
Immunocompetence it is stronger.
(3) microwave photon filter of this programme has a filtering bandwidth 15MHz of ultra-narrow, and the Out-of-band rejection ratio of superelevation >
55dB, wider frequency tuning range 0-10GHz.Had by the Microsphere Cavities that the low dispersion single-mode optical fiber of low-loss is processed into high
Quality factor, it is ensured that the filter has the filtering bandwidth of ultra-narrow.The size appropriate simultaneously for choosing microballoon, can be rationally excellent
Change the Free Spectral Range of mode of resonance, improves filter frequencies tuning range.Finally by the unique edge band based on DP-MZM
Modulation technique greatly improves the inhibition ratio of filter.Mode of the script due to the overcoupling of microcavity and conical fiber, microcavity
The extinction ratio of optical mode become smaller, by unique edge tape handling technology, so that by the way that sideband is believed when PD photoelectric conversion
Number realize RF on cancelling out each other, thus greatly improve filter inhibition ratio.
Detailed description of the invention
Fig. 1 is the flow diagram of the preparation method of microcavity coupled system of the invention.
Fig. 2 is the structural schematic diagram of micro optical fiber prick-drawing device of the invention.
Fig. 3 is the structural schematic diagram of carbon dioxide laser working apparatus of the invention.
Fig. 4 is the structural schematic diagram of microwave photon filter of the invention.
Fig. 5 is the bandwidth of microwave photon filter of the invention and the test result figure for inhibiting ratio.
Fig. 6 is the test result figure of the tuning capability of microwave photon filter of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Referring to Fig. 1, a kind of preparation method of microcavity coupled system, comprising:
S1 draws the first conical fiber that the area a Gen Zhui diameter is 10-20 microns by micro optical fiber prick-drawing device, by first
Conical fiber is truncated from centre, obtains the optical fiber pointed cone 203 that tip diameter is 10-20 microns；Referring to fig. 2, the micro optical fiber is drawn
Wimble device includes Distributed Feedback Laser 101,107, two, dielectric displacement platform identical dielectric displacement sliding blocks, 102, two the first same optical fiber
Fixture 103, data collecting card 110, the first computer 109, dielectric displacement platform controller 108 and for adding to single mode optical fiber
The oxyhydrogen flame high temperature spray gun 106 of heat；Wherein described two dielectric displacement sliding blocks 102 are mounted on the guide rail of dielectric displacement platform 107, institute
It states two dielectric displacement sliding blocks 102 to move under the control of dielectric displacement platform controller 108 along guide rail, the dielectric displacement sliding block 102
It is connected with dielectric displacement platform controller 108；102 are mounted on a fiber clamp on each potentiometer sliding block；Oxyhydrogen flame high temperature
Spray gun 106 is mounted on dielectric displacement platform 107 and is located between two dielectric displacement sliding blocks 102；The single mode optical fiber of cone to be drawn is with
One fiber clamp 103 is fixed；The single mode optical fiber 104 1 of cone to be drawn terminates Distributed Feedback Laser 101, another termination data collecting card
110, data collecting card 110 is also connected with the first computer 109.The tip diameter of the optical fiber pointed cone 203 is 15 microns.
In the present embodiment, the first conical fiber is truncated from centre by optical fiber cutter or blade, it is straight to obtain tip
The optical fiber pointed cone 203 that diameter is 10-20 microns；
In the present embodiment, step S1 includes:
The single mode optical fiber of cone to be drawn is placed in optical fiber to draw on frustum, and fixed with the first fiber clamp 103；
Oxyhydrogen flame high temperature spray gun 106 is placed on the center of two fiber clamps, and single mode optical fiber is heated；
The moving distance of dielectric displacement sliding block is inputted at computer 108, dielectric displacement platform controller 108 receives first and calculates
After the move of machine 109, controlling potential moves the mobile drawing cone for carrying out optical fiber of sliding block 102, and obtaining tip diameter is 10-20 microns
Optical fiber pointed cone 203.
S2 draws second conical fiber for microcavity coupling, second taper by micro optical fiber prick-drawing device
Optical fiber is single mode；In the present embodiment, step S2 further include: the output of 110 real-time monitoring single mode optical fiber 104 of data collecting card
The variation of power；When data collecting card 110 monitors that the output of single mode optical fiber 104 is single mode, the second conical fiber is obtained.The
3102 diameter of cone area, 1 microns of two conical fibers are lost less than 10%.
S3 melts the optical fiber pointed cone of the first conical fiber and in surface tension using carbon dioxide laser working apparatus
Micro-sphere structure 3101 is formed under effect；Referring to Fig. 3, the carbon dioxide laser working apparatus includes laser shutter 201, the second light
Fine fixture 202, CCD204, three-dimensional adjustable shelf 205, zinc selenide lens 206, He-Ne laser 207, second computer 208, dioxy
Change carbon laser 209；Second fiber clamp 202 is fixed on three-dimensional adjustable shelf 205, and He-Ne laser 207 is used for titanium dioxide
Carbon laser 209 export carbon dioxide laser calibrated and positioned, zinc selenide lens 206 be used for carbon dioxide laser into
Line focusing, laser shutter 201 are used to receive the laser penetrated, and CCD and second computer 208 connect, and CCD is for monitoring microballoon
Shape.
In the present embodiment, step S3 includes:
The optical fiber of 203 tail end of optical fiber pointed cone is fixed on the second fiber clamp 202, adjusting three-dimensional adjustable shelf 205 makes to swash
Light hot spot is located at the tip of optical fiber pointed cone 203；
It adjusts laser power and finely tunes the position of optical fiber pointed cone, melt optical fiber pointed cone；
The optical fiber pointed cone of melting just can form micro-sphere structure 3101 under the action of surface tension.By changing fiber tip
The diameter of cone 203 and the position of laser spot just can control the size and spherical shape of microballoon.
The micro-sphere structure 3101 is fitted in the cone area 3102 of the second conical fiber in a manner of overcoupling, obtained micro- by S4
Chamber coupled system 310.Due to the superelevation intrinsic Q of micro-sphere structure 3101, even if microcavity coupled system 310 is in overcoupling state
Q value still with higher.Microcavity coupled system 310 is finally accessed into signal processing system, forms following microwave photon filtering
Device realizes any regulation of two sideband amplitudes and phase by DP-MZM, when the difference of two sideband amplitudes is equal to resonant mode
The extinction ratio of formula, when phase phase difference ± π, can be realized being completely counterbalanced by for signal, to greatly improve microwave photon filter
Inhibition ratio.
- 6, a kind of microwave photon filter based on above-mentioned microcavity coupled system referring to fig. 4, comprising: tunable laser
301, vector network analyzer 302, Polarization Controller 303, DP-MZM304, orthogonal mixer 305, radio frequency amplifier 306 mixes
Doped fiber amplifier 307, variable optical attenuator 308, microcavity coupled system 310, spectroanalysis instrument 309, photodetector
311；The narrow linewidth light carrier that tunable laser 301 issues is after Polarization Controller 303, by DP-MZM double parallel Mach-
Zeng Deer modulator 304 is modulated into double-side band light wave, and double-side band light wave leads to after erbium-doped fiber amplifier 307 amplifies
Cross the optical power that the adjustable control of optical attenuator 308 enters the double-side band light wave of microcavity coupled system 310；Microcavity coupled system
The optical signal of 310 outputs is divided into two-way, enters the spectroanalysis instrument 309 of the side information for real-time monitoring optical signal all the way,
Another way enters the VNA302 for monitoring the radio-frequency spectrum of optical signal after passing through photodetector 311；VNA302 output simultaneously is penetrated
Frequency signal, the radiofrequency signal of output are loaded on DP-MZM304 after radio frequency amplifier 306 by orthogonal mixer 305, real
The modulation of existing sideband.
It is to adjust the coupling position of the second conical fiber first in the working principle of the present embodiment, microwave photon filter
So that micro-sphere structure 3101 is in the overcoupling state of bonding and possess more pure spectrum, obtains microcavity coupled system 310.
Then the input terminal of microcavity coupled system 310 is connected with the output end of adjustable optical attenuator 308 by optical fiber splicer, it will
The input terminal of the output end of microcavity coupled system 310 and spectroanalysis instrument 309, photodetector 311 input terminal be all connected with；It connects
By adjust variable optical attenuator 308, control microcavity coupled system 310 input power, reduce microcavity coupled system 310
It is influenced caused by fuel factor, and obtain pure and high q-factor optical mode by adjusting Polarization Controller 303；Finally by tune
Three bias voltages of section DP-MZM304 enable to be completely counterbalanced by by two sidebands after photodetector 311, in vector
It is able to observe that the superelevation of realization inhibits the microwave signal of ratio on Network Analyzer 302, while spectroanalysis instrument 309 can be passed through
The variation of two sidebands of real-time monitoring facilitates and carries out Real-time Feedback adjusting.
As shown in figure 5, the bandwidth of the notch filter of the present embodiment is 15MHz, inhibit to comprehensively consider filter than being 56dB
The bandwidth and inhibition ratio of wave device, this is that performance is classic in currently known similar filter.Fig. 6 has reacted filter 0-
Tuning capability within the scope of 10GHz, it can be seen that the filter has good tuning capability, filtering within the scope of 10GHz
The performance of device is also able to maintain stabilization.
Optical fiber prick-drawing device can draw various sizes of micro optical fiber to make different-diameter in the embodiment of the present invention
The optical fiber pointed cone of size, the unrestricted diameter and material in single mode optical fiber of the method, can conveniently make different sizes
And the optical fiber pointed cone of different materials, and then the Microsphere Cavities that the quality factor that can process different-diameter and material is high.
This scheme greatly subtracts the complexity of lower microcavity processing technology；Simultaneously because the Microsphere Cavities of processing have optical fiber handle, compared on piece
Device is easier to carry out subsequent various operations.In addition this scheme, the conical fiber that microcavity uses when coupling carry out bonded type
Overcoupling mode is coupled.On the one hand this coupled modes are coupled compared to the optical fiber lens of on piece waveguide device, prism coupling
For conjunction or grating coupling, it is easier to it is also higher to operate coupling efficiency；On the other hand this coupled modes conical fiber and micro-
Chamber is bonded together, and air agitation not will cause too much influence, and coupled system also can be more stable.This last scheme also passes through
The inhibition ratio of filter is improved with modulation scheme based on the unique edge of DP-MZM, optimization of this method compared on piece structure is set
It counts more mature and stable and easy to operate.This is the embodiment micro-sphere structure 3101 for removing this programme and choosing, based on the micro- of optical fiber
Bottle chamber, microvesicle chamber, micro-pipe chamber, micro-loop chamber can equally be applicable in the program.
Above-mentioned specific embodiment is the preferred embodiment of the present invention, can not be limited the invention, and others are appointed
The change or other equivalent substitute modes what is made without departing from technical solution of the present invention, are included in protection of the invention
Within the scope of.
Claims (8)
1. a kind of preparation method of microcavity coupled system characterized by comprising
S1 draws the first conical fiber that the area a Gen Zhui diameter is 10-20 microns by micro optical fiber prick-drawing device, by the first taper
Optical fiber is truncated from centre, obtains the optical fiber pointed cone (203) that tip diameter is 10-20 microns；
S2 draws second conical fiber for microcavity coupling, second conical fiber by micro optical fiber prick-drawing device
For single mode；
S3 melts the optical fiber pointed cone of the first conical fiber and in the effect of surface tension using carbon dioxide laser working apparatus
Lower formation micro-sphere structure (3101)；
The micro-sphere structure (3101) is fitted in the cone area (3102) of the second conical fiber in a manner of overcoupling, obtained micro- by S4
Chamber coupled system (310).
2. the preparation method of microcavity coupled system according to claim 1, which is characterized in that the micro optical fiber prick-drawing device
Including Distributed Feedback Laser (101), dielectric displacement platform (107), two identical dielectric displacement sliding blocks (102), two the first same optical fiber
Fixture (103), data collecting card (110), the first computer (109), dielectric displacement platform controller (108) and for single-mode optics
The oxyhydrogen flame high temperature spray gun (106) that fibre is heated；
Wherein described two dielectric displacement sliding blocks (102) are mounted on the guide rail of dielectric displacement platform (107), and described two dielectric displacement are sliding
Block (102) moves under the control of dielectric displacement platform controller (108) along guide rail, the dielectric displacement sliding block (102) and dielectric displacement
Platform controller (108) is connected；(102) are mounted on a fiber clamp on each potentiometer sliding block；Oxyhydrogen flame high temperature spray gun
(106) it is mounted on dielectric displacement platform (107) and is located between two dielectric displacement sliding blocks (102)；The single mode optical fiber of cone to be drawn is used
First fiber clamp (103) is fixed；The single mode optical fiber (104) one of cone to be drawn terminates Distributed Feedback Laser (101), another terminating data
Capture card (110), data collecting card (110) are also connected with the first computer (109).
3. the preparation method of microcavity coupled system according to claim 2, which is characterized in that step S1 includes:
The single mode optical fiber of cone to be drawn is placed in optical fiber to draw on frustum, and fixed with the first fiber clamp (103)；
Oxyhydrogen flame high temperature spray gun (106) is placed on the center of two fiber clamps, and single mode optical fiber is heated；
The moving distance of dielectric displacement sliding block is inputted at computer (108), dielectric displacement platform controller (108) receives first and calculates
After the move of machine (109), controlling potential moves sliding block (102) mobile drawing cone for carrying out optical fiber, and obtaining tip diameter is 10-20
The optical fiber pointed cone (203) of micron.
4. the preparation method of microcavity coupled system according to claim 1, which is characterized in that step S2 further include:
The variation of the output power of data collecting card (110) real-time monitoring single mode optical fiber (104)；
When data collecting card (110) monitors that the output of single mode optical fiber (104) is single mode, the second conical fiber is obtained.
5. the preparation method of microcavity coupled system according to claim 1, which is characterized in that the carbon dioxide laser adds
Tooling is set including laser shutter (201), the second fiber clamp (202), CCD (204), three-dimensional adjustable shelf (205), zinc selenide lens
(206), He-Ne laser (207), second computer (208) and carbon dioxide laser (209)；
Second fiber clamp (202) is fixed on three-dimensional adjustable shelf (205), and He-Ne laser (207) is used to swash carbon dioxide
Light device (209) output carbon dioxide laser calibrated and positioned, zinc selenide lens (206) be used for carbon dioxide laser into
Line focusing, laser shutter (201) are used to receive the laser penetrated, and CCD (204) and second computer (208) connection, CCD are used for
Monitor the shape of microballoon.
6. the preparation method of microcavity coupled system according to claim 5, which is characterized in that step S3 includes:
The optical fiber of optical fiber pointed cone (203) tail end is fixed on the second fiber clamp (202), adjusting three-dimensional adjustable shelf (205) makes
Laser facula is located at the tip of optical fiber pointed cone (203)；
It adjusts laser power and finely tunes the position of optical fiber pointed cone, melt optical fiber pointed cone；
The optical fiber pointed cone of melting just can form micro-sphere structure (3101) under the action of surface tension.
7. the preparation method of microcavity coupled system according to claim 1, which is characterized in that the optical fiber pointed cone (203)
Tip diameter be 10-20 microns.
8. a kind of microwave photon filter characterized by comprising tunable laser (301), vector network analyzer
(302), Polarization Controller (303), DP-MZM (304), orthogonal mixer (305), radio frequency amplifier (306), Er-doped fiber are put
Big device (307), variable optical attenuator (308), the microcavity coupled system (310) of claim 1-7 any one, spectrum analysis
Instrument (309) and photodetector (311)；
The narrow linewidth light carrier that tunable laser (301) issues is adjusted after Polarization Controller (303) by DP-MZM (304)
Double-side band light wave is made, double-side band light wave is after erbium-doped fiber amplifier (307) amplifies, by the way that optical attenuator is adjusted
(308) control enters the optical power of the double-side band light wave of microcavity coupled system (310)；The light of microcavity coupled system (310) output
Signal is divided into two-way, enters the spectroanalysis instrument (309) of the side information for real-time monitoring optical signal all the way, another way passes through
Photodetector (311) enters the VNA (302) for monitoring the radio-frequency spectrum of optical signal afterwards；The radio frequency letter of VNA (302) output simultaneously
Number, the radiofrequency signal of output is loaded on DP-MZM (304) after radio frequency amplifier (306) by orthogonal mixer (305),
Realize the modulation of sideband.
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| CN201811581230.6A CN109633821B (en) | 2018-12-24 | 2018-12-24 | Preparation method of microcavity coupling system and microwave photon filter |
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| CN111679453A (en) * | 2020-06-05 | 2020-09-18 | 吉林大学 | Microwave photon filter based on few-mode fiber Bragg grating |
| CN112551482A (en) * | 2020-12-10 | 2021-03-26 | 电子科技大学 | Fine control method for free spectrum width of micro rod cavity |
| CN114563844A (en) * | 2021-07-01 | 2022-05-31 | 陕西铁路工程职业技术学院 | Novel cascaded microsphere cavity filter |
| CN114879309A (en) * | 2022-06-20 | 2022-08-09 | 中北大学 | Method for manufacturing on-chip optical fiber microcavity coupling system based on wet etching |
| CN115037375A (en) * | 2022-06-06 | 2022-09-09 | 北京邮电大学 | Ultra-narrow bandwidth microwave photon tunable filter based on ultra-high Q packaged microcavity |
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| CN114879309B (en) * | 2022-06-20 | 2023-08-08 | 中北大学 | Method for manufacturing on-chip optical fiber microcavity coupling system based on wet etching |
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