CN110186448A - A kind of ring laser gyroscope for unmanned navigation chip - Google Patents
A kind of ring laser gyroscope for unmanned navigation chip Download PDFInfo
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- CN110186448A CN110186448A CN201910384516.3A CN201910384516A CN110186448A CN 110186448 A CN110186448 A CN 110186448A CN 201910384516 A CN201910384516 A CN 201910384516A CN 110186448 A CN110186448 A CN 110186448A
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- resonant cavity
- reflecting mirror
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- ring laser
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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
- G01C19/722—Details of the mechanical construction
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- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention discloses a kind of ring laser gyroscopes for unmanned navigation chip, including pump light source, the gyro chip of excimer resonant cavity, the gyro chip of the excimer resonant cavity includes excimer resonant cavity, the first resonant cavity is equipped in the excimer resonant cavity, second resonant cavity, third resonant cavity, gain media and even group optical fiber, even group optical fiber and first resonant cavity, second resonant cavity, third resonant cavity respectively constitutes self-interference noise reduction resonant cavity, the first coupler is equipped between first resonant cavity and the second resonant cavity, second resonant cavity and third resonant cavity are equipped with the second coupler.Ring laser gyroscope for unmanned navigation chip of the invention, three resonant cavities in parallel constitute a big resonance cavity system, further increase the rotational phase difference along optical interference counterclockwise that rotation generates, stability is had more than traditional fiber resonance cavity, the type and quantity for reducing component simplify the complexity of circuit.
Description
Technical field
The present invention relates to a kind of lasergyro, and in particular to a kind of ring laser gyroscope of navigation chip.
Background technique
Inertial technology be all kinds of motion carrier inertial navigations in sea, land and air day, Guidance and control, positioning and directing, attitude stabilization and
The core technology of overload sensing etc., is provided simultaneously with the characteristics such as independence is good, information is comprehensive, real-time continuous, strong interference immunity
Carrier movement information Perception technology.Inertial technology plays extremely important effect in national defence.Gyroscope is inertia system
Core devices measure angular displacement and the angular speed of carrier for the angular movement in sensitive motion carrier relative inertness space, to used
The performance of property system plays a key role.Traditional gyroscope utilizes the directionality and precession of the mechanical rotor of high-speed rotation
To measure revolving speed and orientation relative to inertial space.But the defect as brought by the presence of high speed rotor, such as intolerant to punching
Vibration is hit, what acceleration effect etc. is restricted its application in inertial navigation, hampers further development.
And it is entirely different based on the optical gyroscope of Sagnac effect and conventional electromechanical gyro, it has the advantage that performance is stablized, and resists
Interference performance is strong.Due to not having high speed rotor, thus firm reliable, impact resisting vibrating, anti-acceleration performance are good, resonance type optical
Gyro is one of the important development direction in gyro field, has the advantages such as electromagnetism interference and sensitivity height, in high-precision inertia
It is with a wide range of applications in guidance system, optical resonator is the core constituent element of resonance type optical gyroscope, performance
Directly decide the precision and stability of gyro, the gyro erected optical resonant cavity studied at present is mainly fiber resonance cavity and Integrated Light
Waveguide resonant cavity, wherein fiber resonance cavity has low-loss, advantage high-definition, but non-all solid state characteristic seriously affects
The stability of gyro performance, and there are polarization noise, integrated light guide resonant cavity have micromation, all solid state and at low cost etc. excellent
Gesture, it is considered to be one of the prior development direction of high-performance gyroscope of new generation, but the loss of integrated light guide is big, and it is serious to limit
The raising of integrated light guide resonant cavity gyro sensitivity, but also there are polarization noises, in order to reduce polarization noise, usually need
Peripheral Polarization Controller is wanted to guarantee single polarisation transfer of the optical signal in gyro transmission optical path, however this but seriously limits gyro
The miniaturization of system, and ring resonator can generate error, the mismachining tolerance of resonant cavity, each mirror due to the processing of each reflecting surface
The lateral angles of piece are deformed there are error, and the annular closure optical path that can make resonant cavity is waited to generate noncoplanar error, gyro resonant cavity
Property realize that the difficulty of tuning is big, and preparation process is complicated, therefore all solid state, single polarization, fine definition and tunable optics are humorous
Vibration chamber is the important directions that resonance type optical gyroscope field is urgently developed.
Summary of the invention
Goal of the invention: in view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of for unmanned navigation
The ring laser gyroscope of chip is easy to use.
Technical solution: a kind of ring laser gyroscope for unmanned navigation chip of the present invention, feature
Be: the gyro chip including pump light source, excimer resonant cavity, the gyro chip of the excimer resonant cavity include excimer resonance
Chamber, the excimer resonant cavity is interior to be equipped with the first resonant cavity, the second resonant cavity, third resonant cavity, gain media and connects a group optical fiber,
Even group optical fiber and the first resonant cavity, the second resonant cavity, the third resonant cavity respectively constitute self-interference noise reduction resonant cavity, and described the
The first coupler is equipped between one resonant cavity and the second resonant cavity, second resonant cavity is equipped with second with third resonant cavity and couples
Device, first resonant cavity are connected to the first tunable coupled output by third coupler, and the third resonant cavity passes through
4th coupler is connected to the second tunable coupled output, and the first tunable coupled output is connected with the first modulation
Device, the second tunable coupled output are connected with the second modulator, and first modulator is equipped with the first output grating, institute
The second modulator is stated equipped with the second output grating, the first output grating, the second output grating are connected to by guiding branch
Output optical fibre and photodetector, second resonant cavity are equipped with laser path swage.
Between the first tunable coupled output and the first modulator, the second tunable coupled output and second adjust
Between device processed, the first modulator and first output grating between, the second modulator and second output grating between, the first output light
It is equipped with gap between grid, the second output grating and guiding branch, the gap is filled using high light transmission synthetic quartz.
The laser path swage includes the first reflecting mirror, the second reflecting mirror, third reflecting mirror, the 4th reflecting mirror, institute
Third reflecting mirror is stated equipped with the first fine adjustment stage, the 4th reflecting mirror is equipped with the second fine adjustment stage, first reflecting mirror, the
Two-mirror is set at the slit of the second resonant cavity, X-axis polariscope, Y-axis polariscope of the pump light source through laser scanner
Launch the mutually perpendicular polarised light of two books, the two beams polarised light injects the first reflecting mirror, passes through after the refraction of the first reflecting mirror
Third reflecting mirror, the output of the 4th the second reflecting mirror of reflecting mirror bounce back.
Second resonant cavity is the rectangular cavity that right angle is equipped with slit, the third reflecting mirror, the 4th reflecting mirror
It is spherical mirror, first reflecting mirror, the second reflecting mirror, third reflecting mirror, the 4th reflecting mirror are partial mirror, described the
Three reflecting mirrors, the 4th reflecting mirror and the second resonant cavity semi-gloss glue connection, first reflecting mirror, the second reflectance of reflector are greater than
95%.
The gain media is gaseous state, and the gain media is the mixed gas of helium, neon, carbon dioxide.
The pump light source further includes isolator and attenuator, first resonant cavity, the second resonant cavity, third resonant cavity
Made by single mode optical fiber, first resonant cavity, the second resonant cavity, third resonance the number of turns be 5~8 circles, first resonance
Chamber, the second resonant cavity, 40 μm~350 μm of radius of third resonance.
The first output grating, the second output grating are equipped with light splitting isolator.
The gyro chip of the excimer resonant cavity includes stacking gradually molding substrate, under-clad layer, sandwich layer, middle covering, on
Covering and coating, the sandwich layer are metal core layer, and the top covering, middle covering, under-clad layer and coating are semiconductor core
Layer
First modulator, the second modulator are lithium niobate phase modulator.
It is described first output grating, second output grating grating constant be 540nm, the etching depth of grating be 45nm~
55nm。
The utility model has the advantages that a kind of ring laser gyroscope for unmanned navigation chip of the invention, humorous by first
Shake chamber, the second resonant cavity, third resonant cavity and laser path swage, as the gyro resonance cavity chip middle ring shape composition portion
Point, the loss during optical signal transmission is effectively reduced, improves the clarity of resonant cavity, while also stabilizing in resonant cavity
The polarization state of optical signal provides guarantee to improve gyro sensitivity, and using tunable coupler, single polarization transfer characteristics are real
Optical signal single polarisation transfer table in resonant cavity is showed, the polarization noise in gyro system can be effectively suppressed, it is sensitive to improve gyro
Degree, the 4th reflecting mirror and the second resonant cavity semi-gloss glue connection, after regulating suitable angle, double of optical cement carries out curing process,
The all solid state of chip is realized, three resonant cavities in parallel constitute a big resonance cavity system, so that existing along light counterclockwise
Three resonant cavities repeatedly carry out transmission back, further increase the rotational phase difference along optical interference counterclockwise that rotation generates, will
The sensitivity of gyro improves 3 times or more, has more stability than traditional fiber resonance cavity, and do not have polarization noise, reduces member
The type and quantity of device simplify the complexity of circuit, and hardware is succinct, there is higher integrated level.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ring laser gyroscope of the present invention；
Fig. 2 is the gyro chip sectional view of excimer resonant cavity of the invention.
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
As shown in Fig. 1 to 2, a kind of ring laser gyroscope for unmanned navigation chip of the invention, feature
Be: including pump light source 1, the gyro chip 2 of excimer resonant cavity, the gyro chip 2 of excimer resonant cavity includes excimer resonant cavity,
It is equipped with the first resonant cavity 3, the second resonant cavity 4, third resonant cavity 5, gain media in excimer resonant cavity and connects group optical fiber 6, even
Group optical fiber 6 and the first resonant cavity 3, the second resonant cavity 4, third resonant cavity 5 respectively constitute self-interference noise reduction resonant cavity, the first resonance
The first coupler 7 is equipped between 3 chambers and the second resonant cavity 4, the second resonant cavity 4 is equipped with the second coupler 8 with third resonant cavity 5,
First resonant cavity 3 is connected to the first tunable coupled output 10 by third coupler 9, and third resonant cavity 5 passes through the 4th coupling
Clutch 9 is connected to the second tunable coupled output 11, and the first tunable coupled output 10 is connected with the first modulator 12, the
Two tunable coupled outputs 11 are connected with the second modulator 13, and the first modulator 12 is equipped with the first output grating 14, and second adjusts
Device 13 processed is equipped with the second output grating 15, and the first output output grating 15 of grating 14, second is connected to defeated by guiding branch 16
Optical fiber 17 and photodetector 18 out, the second resonant cavity 4 are equipped with laser path swage.
Between first tunable coupled output 10 and the first modulator 12, the second tunable coupled output 11 and second
Between modulator 13, between the first modulator 12 and the first output grating 14, the second modulator 13 with second export grating 15 it
Between, the first output grating 14, second export and be equipped with gap between grating 15 and guiding branch 16, gap is artificial using high light transmission
Filled with Quartz.
Laser path swage includes the first reflecting mirror 17, the second reflecting mirror 18, third reflecting mirror 19, the 4th reflecting mirror
20, third reflecting mirror 19 is equipped with the first fine adjustment stage 21, and the 4th reflecting mirror 20 is equipped with the second fine adjustment stage 22, the first reflecting mirror
17, the second reflecting mirror 18 is set at the slit of the second resonant cavity 4, and pump light source 1 is through the X-axis polariscope of laser scanner 23, Y-axis
Polariscope launches the mutually perpendicular polarised light of two books, and two beam polarised lights inject the first reflecting mirror 17, through 17 folding of the first reflecting mirror
It is exported after penetrating through third reflecting mirror 18,20 the second reflecting mirror of bounce back 18 of the 4th reflecting mirror.
Second resonant cavity 4 is the rectangular cavity that right angle is equipped with slit, and third reflecting mirror 19, the 4th reflecting mirror 20 are
Spherical mirror, the first reflecting mirror 17, the second reflecting mirror 18, third reflecting mirror 19, the 4th reflecting mirror 20 are partial mirror, and third is anti-
The 4 semi-gloss glue connection of mirror 19, the 4th reflecting mirror 20 and the second resonant cavity is penetrated, the first reflecting mirror 17,18 reflectivity of the second reflecting mirror are big
In 95%.
Gain media is gaseous state, and gain media is the mixed gas of helium, neon, carbon dioxide.
Pump light source 1 further includes isolator 24 and attenuator 25, the first resonant cavity 3, the second resonant cavity 4, third resonant cavity 5
Made by single mode optical fiber, the first resonant cavity 3, the second resonant cavity 4, third resonance 5 the number of turns be 5~8 circles, the first resonant cavity 3, the
40 μm~350 μm of radius of two resonant cavities 4, third resonance 5.
First output grating 4, second exports grating 15 and is equipped with light splitting isolator.
The gyro chip of excimer resonant cavity includes stacking gradually molding substrate 26, under-clad layer 27, sandwich layer 28, middle covering
29, top covering 30 and coating 31, sandwich layer 28 are metal core layer, and top covering 30, middle covering 29, under-clad layer 27 and coating 31 are equal
For semiconductor core.
First modulator 1, the second modulator 13 are lithium niobate phase modulator.
First output grating 14, second export grating 15 grating constant be 540nm, the etching depth of grating be 45nm~
55nm。
By the first resonant cavity 3, the second resonant cavity 4, third resonant cavity 5 and laser path swage, as the gyro
Resonance cavity chip middle ring shape component part, effectively reduces the loss during optical signal transmission, improves the clear of resonant cavity
Degree, while the polarization state of optical signal in resonant cavity is also stabilized, guarantee is provided to improve gyro sensitivity, utilizes tunable coupling
Clutch, single polarization transfer characteristics realize optical signal single polarisation transfer table in resonant cavity, can be effectively suppressed in gyro system
Polarization noise, improve gyro sensitivity, the 4 semi-gloss glue connection of third reflecting mirror 19, the 4th reflecting mirror 20 and the second resonant cavity, tune
After saving good suitable angle, double of optical cement carries out curing process, realizes all solid state of chip, and three resonant cavities in parallel are constituted
One big resonance cavity system further increases rotation so that repeatedly carrying out transmission back in three resonant cavities along light counterclockwise
The sensitivity of gyro is improved 3 times or more, than traditional optical fiber resonance by the rotational phase difference along optical interference counterclockwise generated
Chamber has more stability, and does not have polarization noise, reduces the type and quantity of component, simplifies the complexity of circuit, firmly
Part is succinct, there is higher integrated level.
As described above, must not be explained although the present invention has been indicated and described referring to specific preferred embodiment
For the limitation to invention itself.It without prejudice to the spirit and scope of the invention as defined in the appended claims, can be right
Various changes can be made in the form and details for it.
Claims (10)
1. a kind of ring laser gyroscope for unmanned navigation chip, it is characterised in that: humorous including pump light source, excimer
It shakes the gyro chip of chamber, the gyro chip of the excimer resonant cavity includes excimer resonant cavity, and the is equipped in the excimer resonant cavity
One resonant cavity, the second resonant cavity, third resonant cavity, gain media and company's group optical fiber, the even group optical fiber and the first resonant cavity,
Second resonant cavity, third resonant cavity respectively constitute self-interference noise reduction resonant cavity, between first resonant cavity and the second resonant cavity
Equipped with the first coupler, second resonant cavity and third resonant cavity are equipped with the second coupler, and first resonant cavity passes through the
Three couplers are connected to the first tunable coupled output, and it is adjustable that the third resonant cavity by the 4th coupler is connected to second
Humorous coupled output, the first tunable coupled output are connected with the first modulator, the second tunable coupling output
End is connected with the second modulator, and first modulator is equipped with the first output grating, and second modulator is equipped with the second output
Grating, the first output grating, the second output grating are connected to output optical fibre and photodetector by guiding branch, described
Second resonant cavity is equipped with laser path swage.
2. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: described
Between first tunable coupled output and the first modulator, between the second tunable coupled output and the second modulator,
One modulator and first output grating between, the second modulator and second output grating between, first output grating, second output
Gap is equipped between grating and guiding branch, the gap is filled using high light transmission synthetic quartz.
3. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: described
Laser path swage includes the first reflecting mirror, the second reflecting mirror, third reflecting mirror, the 4th reflecting mirror, the third reflecting mirror
Equipped with the first fine adjustment stage, the 4th reflecting mirror is equipped with the second fine adjustment stage, and first reflecting mirror, the second reflecting mirror are set to
At the slit of second resonant cavity, X-axis polariscope of the pump light source through laser scanner, that Y-axis polariscope launches two books is mutual
Perpendicular polarised light, the two beams polarised light inject the first reflecting mirror, through third reflecting mirror, the after the refraction of the first reflecting mirror
The output of four the second reflecting mirrors of reflecting mirror bounce back.
4. the ring laser gyroscope according to claim 3 for unmanned navigation chip, it is characterised in that: described
Second resonant cavity is the rectangular cavity that right angle is equipped with slit, and the third reflecting mirror, the 4th reflecting mirror are spherical mirror, institute
Stating the first reflecting mirror, the second reflecting mirror, third reflecting mirror, the 4th reflecting mirror is partial mirror, the third reflecting mirror, the 4th
Reflecting mirror and the second resonant cavity semi-gloss glue connection, first reflecting mirror, the second reflectance of reflector are greater than 95%.
5. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: described
Gain media is gaseous state, and the gain media is the mixed gas of helium, neon, carbon dioxide.
6. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: described
Pump light source further includes isolator and attenuator, and first resonant cavity, the second resonant cavity, third resonant cavity are by single mode optical fiber system
Make, first resonant cavity, the second resonant cavity, third resonance the number of turns be 5~8 circles, first resonant cavity, the second resonance
40 μm~350 μm of radius of chamber, third resonance.
7. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: described
First output grating, the second output grating are equipped with light splitting isolator.
8. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: described
The gyro chip of excimer resonant cavity includes stacking gradually molding substrate, under-clad layer, sandwich layer, middle covering, top covering and coating,
The sandwich layer is metal core layer, and the top covering, middle covering, under-clad layer and coating are semiconductor core.
9. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: described
First modulator, the second modulator are lithium niobate phase modulator.
10. the ring laser gyroscope according to claim 1 for unmanned navigation chip, it is characterised in that: institute
State the first output grating, second output grating grating constant be 540nm, the etching depth of grating be 45nm~55nm.
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| CN201910384516.3A CN110186448A (en) | 2019-05-09 | 2019-05-09 | A kind of ring laser gyroscope for unmanned navigation chip |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112857355A (en) * | 2021-01-08 | 2021-05-28 | 华中科技大学 | Passive laser gyroscope based on polarization selection locking and angular velocity determination method |
| CN113280804A (en) * | 2021-05-19 | 2021-08-20 | 北京航空航天大学 | Nano-photon gyroscope |
| CN113280803A (en) * | 2021-05-19 | 2021-08-20 | 北京航空航天大学 | Sensitive unit and optical gyroscope |
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| CN113280803A (en) * | 2021-05-19 | 2021-08-20 | 北京航空航天大学 | Sensitive unit and optical gyroscope |
| CN113280804B (en) * | 2021-05-19 | 2023-02-17 | 北京航空航天大学 | Nano-photon gyroscope |
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Application publication date: 20190830 |