CN110426026A - A kind of full air-core resonant gyroscope based on narrow slit wave-guide and photonic crystal fiber - Google Patents
A kind of full air-core resonant gyroscope based on narrow slit wave-guide and photonic crystal fiber Download PDFInfo
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- CN110426026A CN110426026A CN201910726097.7A CN201910726097A CN110426026A CN 110426026 A CN110426026 A CN 110426026A CN 201910726097 A CN201910726097 A CN 201910726097A CN 110426026 A CN110426026 A CN 110426026A
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- 239000000835 fiber Substances 0.000 title claims abstract description 44
- 239000004038 photonic crystal Substances 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 7
- 230000000644 propagated effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 208000035480 Ring chromosome 8 syndrome Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/721—Details
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- Optics & Photonics (AREA)
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- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention discloses a kind of full air-core resonant gyroscope based on narrow slit wave-guide and photonic crystal fiber, including light source, the first beam splitter, the second beam splitter, third beam splitter, the first signal sensor, second signal detector, narrow slit wave-guide beam splitter, hollow-core photonic crystal fiber ring；Narrow slit wave-guide beam splitter, including silicon substrate, silica buffer layer, LiNbO_3 film layer；LiNbO_3 film layer, surface etch have V-groove, the first narrow slit wave-guide, the second narrow slit wave-guide；Hollow-core photonic crystal fiber ring both ends are connect with narrow slit wave-guide beam splitter, form the resonant cavity of full air-core；Light wave is constantly in and propagates in air in the circulation of entire resonant cavity, reduces all kinds of losses and environment influence during light wave transmissions, is conducive to the performance for promoting resonant gyroscope；Solve the problems, such as that existing Hollow-Core Photonic Crystal Fibers resonant gyroscope resonant cavity is not exclusively the decline of resonance performance caused by air-core.
Description
Technical field
It is specifically a kind of to be based on narrow slit wave-guide and photonic crystal fiber the invention belongs to integrated optics and field of sensing technologies
Full air-core resonant gyroscope.
Background technique
Gyro is the essential component such as platform navigation, guidance, sighting stabilization as a kind of inertia measurement device.With
Other gyros are compared, and optical fibre gyro has many advantages: no mechanical rotary part, and wear problem is not present, and have longer make
Use the service life；Components are few, have stronger impact resistance and the ability of anti-accelerated motion etc..Resonance type optical fiber gyro compares interference formula
Fiber lengths needed for optical fibre gyro are very short, can be realized miniaturization, have potential highly sensitive.In Hollow-Core Photonic Crystal Fibers
Light transmits in air, has " endlessly single mode " and low temperature, stress sensitivity, it is quick to become resonance type optical fiber gyro
Feel the ideal material of ring.
Resonant cavity is constituted using Hollow-Core Photonic Crystal Fibers to need for Hollow-Core Photonic Crystal Fibers and beam splitter to be attached.
Being currently based on beam splitter used by the resonant mode gyro of Hollow-Core Photonic Crystal Fibers is general single mode fiber beam splitter, so that light
Not exclusively it is to transmit in resonant ring in air medium, limits the performance of resonant cavity.Narrow slit wave-guide 2004 by
Lipson group, Cornell university propose, they find, when the silicon waveguide of width very little close to nanometer apart from when, light field will
It is consumingly limited in low-refraction slit among them.Narrow slit wave-guide is divided into vertical slit and water according to the difference of polarization direction
Flat narrow slit wave-guide, two kinds of common features of structure are that only have outstanding Local Characteristic on corresponding polarization direction,
That is every kind of narrow slit wave-guide is only to transverse electric (TE) or a kind of polarization mode local of horizontal magnetic (TM).
Summary of the invention
For overcome the deficiencies in the prior art, it is brilliant based on narrow slit wave-guide and hollow photon that the object of the present invention is to provide one kind
The full air-core resonant gyroscope of body optical fiber, it is intended to which it is not exclusively empty for solving existing Hollow-Core Photonic Crystal Fibers resonant gyroscope resonant cavity
The problem of resonance performance caused by gaseous core declines.
A kind of full air-core resonant gyroscope based on narrow slit wave-guide and Hollow-Core Photonic Crystal Fibers, including light source, first point
Beam device, the second beam splitter, third beam splitter, the first signal sensor, second signal detector, narrow slit wave-guide beam splitter, hollow
Photonic crystal fiber ring；Light source is connect with the first beam splitter, for generating light wave；First beam splitter is produced for receiving the light source
Raw light wave, and light wave is divided into two bundles；Second beam splitter and first beam splitter, the first signal sensor, narrow slit wave-guide
Beam splitter connection；Third beam splitter is connect with first beam splitter, second signal detector, narrow slit wave-guide beam splitter；It is described
Second, third beam splitter receives the light wave that first beam splitter issues respectively, and is exported respectively to the narrow slit wave-guide beam splitting
Device；Hollow-core photonic crystal fiber ring both ends are connect with the narrow slit wave-guide beam splitter, form the resonant cavity of full air-core；It is described narrow
It stitches waveguide beam splitter and receives the light wave that second, third described beam splitter issues, recycle light wave in the resonant cavity, and by institute
The light wave for stating resonant cavity return is exported respectively to second, third described beam splitter；The received return light warp of second beam splitter
First signal sensor is converted into electric signal output；The received return light of third beam splitter is converted through second signal detector
It is exported at electric signal；
The narrow slit wave-guide beam splitter Down-Up successively includes silicon substrate, silica buffer layer, LiNbO_3 film layer；
The LiNbO_3 film layer, surface etch have V-groove, the first narrow slit wave-guide, the second narrow slit wave-guide；First narrow slit wave-guide with
Formation coupled zone parallel to each other in the middle part of second narrow slit wave-guide；First narrow slit wave-guide and the second narrow slit wave-guide both ends respectively with V
Type groove connection；The V-groove with hollow-core photonic crystal fiber or other optical fiber for connecting；Second narrow slit wave-guide both ends
Two sides are placed with metal modulator electrode respectively, for applying Electro-optical Modulation.
Transmission process of the light wave in full air-core resonant gyroscope is as follows:
The light wave that light source generates is divided into two-beam wave after the first beam splitter；Wherein a branch of light wave inputs the second beam splitter,
It is defined as light wave counterclockwise；Light wave counterclockwise passes through the second beam splitter, after the input of the narrow slit wave-guide end beam splitter a, a part
Light wave is exported by the narrow slit wave-guide end beam splitter b, remaining light wave is coupled into the second narrow slit wave-guide, starts the resonance in full air-core
It is transmitted in chamber, by the end narrow slit wave-guide beam splitter d, into Hollow-Core Photonic Crystal Fibers ring；Light wave is in Hollow-Core Photonic Crystal Fibers
It is transmitted in ring, behind the end input slit waveguide beam splitter c, a part of light wave is by being coupled into the first narrow slit wave-guide, by slit
The output of the end waveguide beam splitter b, remaining light wave continue the circle transmission in resonant cavity；The light exported from the narrow slit wave-guide end beam splitter b
Wave, including by the light wave that directly exports after the input of the narrow slit wave-guide end beam splitter a, and the light wave exported after resonant cavity recycles,
It is superimposed, by third beam splitter, electric signal output is converted optical signals by second signal detector.
Another Shu Guangbo exported from the first beam splitter inputs third beam splitter, is defined as light wave clockwise；Clockwise
Light wave passes through third beam splitter, and after the input of the narrow slit wave-guide end beam splitter b, a part of light wave is defeated by the end narrow slit wave-guide beam splitter a
Out, remaining light wave is coupled into the second narrow slit wave-guide, starts to transmit in the resonant cavity of full air-core, by narrow slit wave-guide beam splitting
The end device c, into Hollow-Core Photonic Crystal Fibers ring；Light wave transmits in Hollow-Core Photonic Crystal Fibers ring, input slit waveguide beam splitting
Behind the end device d, a part of light wave exports, remaining light wave by being coupled into the first narrow slit wave-guide by the narrow slit wave-guide end beam splitter a
Continue the circle transmission in resonant cavity；The light wave exported from the narrow slit wave-guide end beam splitter a, including by the end narrow slit wave-guide beam splitter b
The light wave directly exported after input, and the light wave exported after resonant cavity recycles, are superimposed, by the second beam splitter, by
First signal sensor converts optical signals into electric signal output.
The invention has the beneficial effects that:
1, the resonant cavity is enclosed using hollow-core photonic crystal fiber ring and narrow slit wave-guide, and light wave is in hollow photon crystal
It is mainly propagated in air-core in fiber optic loop, light wave is mainly propagated in air slit in narrow slit wave-guide, and light wave is entire
It in the circulation of resonant cavity, is constantly in and propagates in air, reduce all kinds of losses and environment influence during light wave transmissions,
Be conducive to be promoted the performance of resonant gyroscope；
2, the narrow slit wave-guide beam splitter can play partially because narrow slit wave-guide has outstanding Local Characteristic in polarization direction
Vibration control action, the function of Polarization Control has been integrated on narrow slit wave-guide beam splitter, the use of device is reduced；
3, the metal modulator electrode, is integrated on narrow slit wave-guide beam splitter, plays the function of the long Electro-optical Modulation of chamber, increases
The integrated level of gyro plays certain effect to the reduction of volume.
Detailed description of the invention
Fig. 1 is the full air-core resonant gyroscope schematic diagram based on narrow slit wave-guide and Hollow-Core Photonic Crystal Fibers；
Fig. 2 is narrow slit wave-guide beam splitter schematic cross-section；
In figure: light source -1, the first beam splitter -2, the second beam splitter -3, third beam splitter -4, the first signal sensor -5,
Second signal detector -6, narrow slit wave-guide beam splitter -7, Hollow-Core Photonic Crystal Fibers ring -8, V-shaped groove -9, metal modulation electricity
It is pole -10, the first narrow slit wave-guide -11, silicon substrate -12, silica buffer layer -13, LiNbO_3 film layer -14, second narrow
Stitch waveguide -15.
Specific embodiment
Technical solution of the present invention is further described below in conjunction with attached drawing.
As shown in Figs. 1-2, a kind of full air-core resonant gyroscope based on narrow slit wave-guide and Hollow-Core Photonic Crystal Fibers, including
It is light source 1, the first beam splitter 2, the second beam splitter 3, third beam splitter 4, the first signal sensor 5, second signal detector 6, narrow
Stitch waveguide beam splitter 7, hollow-core photonic crystal fiber ring 8；Light source 1 is connect with the first beam splitter 2, for generating light wave；First point
Beam device 2 is used to receive the light wave that the light source 1 generates, and light wave is divided into two bundles；Second beam splitter 3 and first beam splitter
2, the first signal sensor 5, narrow slit wave-guide beam splitter 7 connect；Third beam splitter 4 and first beam splitter 2, second signal are visited
Survey device 6, narrow slit wave-guide beam splitter 7 connects；Second beam splitter 3, third beam splitter 4 receive first beam splitter 2 respectively
The light wave of sending, and exported respectively to the narrow slit wave-guide beam splitter 7；8 both ends of hollow-core photonic crystal fiber ring and the slit
Waveguide beam splitter 7 connects, and forms the resonant cavity of full air-core；The narrow slit wave-guide beam splitter 7 receive second beam splitter 3,
The light wave that third beam splitter 4 issues, recycles light wave in the resonant cavity, and the light wave difference that the resonant cavity is returned is defeated
Out to second beam splitter 3, third beam splitter 4；The received return light of second beam splitter 3 is through the first signal sensor 5
It is converted into electric signal output；It is defeated that the received return light of the third beam splitter 4 through second signal detector 6 is converted into electric signal
Out；
The narrow slit wave-guide beam splitter 7 is Down-Up successively thin including silicon substrate 12, silica buffer layer 13, lithium niobate
Film layer 14；The LiNbO_3 film layer 14, surface etch have V-groove 9, the first narrow slit wave-guide 11, the second narrow slit wave-guide 15；It is described
15 middle part formation coupled zone parallel to each other of first narrow slit wave-guide 11 and the second narrow slit wave-guide；First narrow slit wave-guide 11 and second
15 both ends of narrow slit wave-guide are connect with V-groove 9 respectively；The V-groove 9 is used to connect with hollow-core photonic crystal fiber or other optical fiber
It connects；The two sides at 15 both ends of the second narrow slit wave-guide are placed with metal modulator electrode 10 respectively, for applying Electro-optical Modulation；
Transmission process of the light wave in full air-core resonant gyroscope is as follows:
The light wave that light source 1 generates is divided into two-beam wave after the first beam splitter 2；Wherein a branch of light wave inputs the second beam splitting
Device 3 is defined as light wave counterclockwise；Light wave counterclockwise passes through the second beam splitter 3, after the input of the narrow slit wave-guide end beam splitter 7a,
A part of light wave is exported by the narrow slit wave-guide end beam splitter 7b, remaining light wave is coupled into the second narrow slit wave-guide 15, is started complete empty
It is transmitted in the resonant cavity of gaseous core, by the end narrow slit wave-guide beam splitter 7d, into Hollow-Core Photonic Crystal Fibers ring 8；Light wave is hollow
It is transmitted in photonic crystal fiber ring 8, behind 7 end device c of input slit waveguide beam splitting, a part of light wave is by being coupled into the first slit
Waveguide 11 is exported by the narrow slit wave-guide end beam splitter 7b, remaining light wave continues the circle transmission in resonant cavity；From narrow slit wave-guide point
The light wave of the beam end device 7b output including the light wave by directly exporting after the input of the narrow slit wave-guide end beam splitter 7a, and passes through resonant cavity
The light wave exported after circulation, is superimposed, and by third beam splitter 4, converts optical signals into telecommunications by second signal detector 6
Number output.
Another Shu Guangbo exported from the first beam splitter 2 inputs third beam splitter 4, is defined as light wave clockwise；Up time
Needle light wave passes through third beam splitter 4, and after the input of the narrow slit wave-guide end beam splitter 7b, a part of light wave is by narrow slit wave-guide beam splitter 7a
End output, remaining light wave are coupled into the second narrow slit wave-guide 15, start to transmit in the resonant cavity of full air-core, by slit wave
The end beam splitter 7c is led, into Hollow-Core Photonic Crystal Fibers ring 8；Light wave transmits in Hollow-Core Photonic Crystal Fibers ring 8, input slit
Behind the end waveguide beam splitter 7d, a part of light wave is by being coupled into the first narrow slit wave-guide 11, by the end narrow slit wave-guide beam splitter 7a
Output, remaining light wave continue the circle transmission in resonant cavity；The light wave exported from the narrow slit wave-guide end beam splitter 7a, including by slit
The light wave directly exported after the input of the end waveguide beam splitter 7b, and the light wave exported after resonant cavity recycles, are superimposed, and pass through
Second beam splitter 3 converts optical signals into electric signal output by the first signal sensor 5.
The resonant cavity is enclosed using hollow-core photonic crystal fiber ring 8 with the second narrow slit wave-guide 15, and light wave is in sky
It is mainly propagated in air-core in core photonic crystal fiber ring 8, light wave is in the second narrow slit wave-guide 15 mainly in air slit
Middle propagation, light wave are constantly in and propagate in air in the circulation of entire resonant cavity, reduce each during light wave transmissions
Class loss is influenced with environment, is conducive to the performance for promoting resonant gyroscope；
The narrow slit wave-guide beam splitter 7 can play partially because narrow slit wave-guide has outstanding Local Characteristic in polarization direction
Vibration control action, the function of Polarization Control has been integrated on narrow slit wave-guide beam splitter 7, the use of device is reduced.
The metal modulator electrode 10, is integrated on narrow slit wave-guide beam splitter 7, plays the function of the long Electro-optical Modulation of chamber,
The integrated level for increasing gyro plays certain effect to the reduction of volume.
Claims (3)
1. a kind of full air-core resonant gyroscope based on narrow slit wave-guide and Hollow-Core Photonic Crystal Fibers, which is characterized in that including light
Source (1), the first beam splitter (2), the second beam splitter (3), third beam splitter (4), the first signal sensor (5), second signal are visited
Survey device (6), narrow slit wave-guide beam splitter (7), hollow-core photonic crystal fiber ring (8)；Light source (1) is connect with the first beam splitter (2), is used
In generation light wave；First beam splitter (2) is used to receive the light wave of the light source (1) generation, and light wave is divided into two bundles；Second point
Beam device (3) is connect with first beam splitter (2), the first signal sensor (5), narrow slit wave-guide beam splitter (7) respectively；Third point
Beam device (4) is connect with first beam splitter (2), second signal detector (6), narrow slit wave-guide beam splitter (7) respectively；Described
Two beam splitters (3), third beam splitter (4) receive the light wave that first beam splitter (2) issues respectively, and are exported respectively to described
Narrow slit wave-guide beam splitter (7)；Hollow-core photonic crystal fiber ring (8) both ends are connect with the narrow slit wave-guide beam splitter (7), are formed complete
The resonant cavity of air-core；The narrow slit wave-guide beam splitter (7) receives second beam splitter (3), third beam splitter (4) issues
Light wave recycles light wave in the resonant cavity, and the light wave that the resonant cavity returns is exported respectively to second beam splitting
Device (3), third beam splitter (4)；The received return light of second beam splitter (3) is converted into electricity through the first signal sensor (5)
Signal output；The received return light of the third beam splitter (4) is converted into electric signal output through second signal detector (6).
2. full air-core resonant gyroscope according to claim 1, which is characterized in that the narrow slit wave-guide beam splitter (7),
It Down-Up successively include silicon substrate (12), silica buffer layer (13), LiNbO_3 film layer (14)；The LiNbO_3 film
Layer (14), surface etch have V-groove (9), the first narrow slit wave-guide (11), the second narrow slit wave-guide (15)；First narrow slit wave-guide
(11) and in the middle part of the second narrow slit wave-guide (15) formation coupled zone parallel to each other；First narrow slit wave-guide (11) and the second slit wave
(15) both ends are led to connect with V-groove (9) respectively；The V-groove (9) is used to connect with hollow-core photonic crystal fiber or other optical fiber
It connects；The two sides at the second narrow slit wave-guide (15) both ends are placed with metal modulator electrode (10) respectively, for applying Electro-optical Modulation.
3. full air-core resonant gyroscope according to claim 2, which is characterized in that light wave is in full air-core resonant gyroscope
Transmission process it is as follows: light source (1) generate light wave after the first beam splitter (2), be divided into two-beam wave；Wherein light beam
Wave inputs the second beam splitter (3), is defined as light wave counterclockwise；Light wave counterclockwise passes through the second beam splitter (3), by narrow slit wave-guide
After the input of beam splitter (7) end a, a part of light wave is exported by narrow slit wave-guide beam splitter (7) end b, remaining light wave is coupled into second
Narrow slit wave-guide (15) starts to transmit in the resonant cavity of full air-core, by narrow slit wave-guide beam splitter (7) end d, into hollow light
Photonic crystal fiber ring (8)；Light wave transmits in Hollow-Core Photonic Crystal Fibers ring (8), behind input slit waveguide beam splitting (7) end device c,
A part of light wave exports, remaining light wave by being coupled into the first narrow slit wave-guide (11) by narrow slit wave-guide beam splitter (7) end b
Continue the circle transmission in resonant cavity；The light wave exported from narrow slit wave-guide beam splitter (7) end b, including by narrow slit wave-guide beam splitter
(7) light wave directly exported after the input of the end a, and the light wave exported after resonant cavity recycles, are superimposed, by third beam splitting
Device (4) converts optical signals into electric signal output by second signal detector (6)；Another beam exported from the first beam splitter (2)
Light wave inputs third beam splitter (4), is defined as light wave clockwise；Light wave clockwise passes through third beam splitter (4), by slit wave
After leading the input of beam splitter (7) end b, a part of light wave is exported by narrow slit wave-guide beam splitter (7) end a, remaining light wave is coupled into the
Two narrow slit wave-guides (15) start to transmit in the resonant cavity of full air-core, and by narrow slit wave-guide beam splitter (7) end c, entrance is hollow
Photonic crystal fiber ring (8)；Light wave transmission, input slit waveguide beam splitter (7) end d in Hollow-Core Photonic Crystal Fibers ring (8)
Afterwards, a part of light wave exports, remaining light by being coupled into the first narrow slit wave-guide (11) by narrow slit wave-guide beam splitter (7) end a
Wave continues the circle transmission in resonant cavity；The light wave exported from narrow slit wave-guide beam splitter (7) end a, including by narrow slit wave-guide beam splitting
The light wave directly exported after the input of device (7) end b, and the light wave exported after resonant cavity recycles, are superimposed, by second point
Beam device (3) converts optical signals into electric signal output by the first signal sensor (5).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536960A (en) * | 2020-04-30 | 2020-08-14 | 浙江大学 | Double-ring parallel resonant gyro system and double-closed-loop digital demodulation method thereof |
| CN111536960B (en) * | 2020-04-30 | 2022-01-18 | 浙江大学 | Double-ring parallel resonant gyro system and double-closed-loop digital demodulation method thereof |
| CN112066975A (en) * | 2020-09-25 | 2020-12-11 | 中北大学 | Gyroscope and accelerometer integrated system based on double resonant cavities and preparation method thereof |
| CN112066975B (en) * | 2020-09-25 | 2021-05-14 | 中北大学 | Gyroscope and accelerometer integrated system based on double resonant cavities and preparation method thereof |
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