CN103712614B - The two-way close loop resonance formula optical gyroscope of optical power feedback - Google Patents

The two-way close loop resonance formula optical gyroscope of optical power feedback Download PDF

Info

Publication number
CN103712614B
CN103712614B CN201310602722.XA CN201310602722A CN103712614B CN 103712614 B CN103712614 B CN 103712614B CN 201310602722 A CN201310602722 A CN 201310602722A CN 103712614 B CN103712614 B CN 103712614B
Authority
CN
China
Prior art keywords
optical
module
control device
feedback
power control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201310602722.XA
Other languages
Chinese (zh)
Other versions
CN103712614A (en
Inventor
张顾洪
金仲和
马慧莲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN201310602722.XA priority Critical patent/CN103712614B/en
Publication of CN103712614A publication Critical patent/CN103712614A/en
Application granted granted Critical
Publication of CN103712614B publication Critical patent/CN103712614B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • G01C19/727—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 using a passive ring resonator

Landscapes

  • Physics & Mathematics (AREA)
  • 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 two-way close loop resonance formula optical gyroscope of optical power feedback.It comprises the optical system be made up of tunable laser, optical splitters, optical power control device/frequency shifter, optical modulator, optical resonator, photoelectric conversion module etc., and by the treatment circuit of modulation /demodulation module, feedback lock, optical power feedback module composition.The present invention, by detecting photodetector rear end secondary frequency signal, utilizes optical power control device and driving control unit thereof to construct the feedback control loop of luminous power, further increases the stability that resonator cavity enters chamber luminous power.The present invention is conducive to improving the stability that gyro exports constant multiplier, reduces the impact of optical Kerr effect, is conducive to the symmetry improving gyrosystem, eliminates reciprocity noise, improves the long-time stability of two-way close loop resonance formula optical gyroscope.

Description

The two-way close loop resonance formula optical gyroscope of optical power feedback
Technical field
The present invention relates to optical sensing and signal detection technique field, particularly relate to a kind of two-way close loop resonance formula optical gyroscope of optical power feedback.
Background technology
Two-way close loop resonance formula optical gyroscope (ResonatorOpticGyro, ROG) utilizes optics Sagnac effect to realize rotating the high-precision mini inertial sensor of one detected.The two-way close loop resonance formula optical gyroscope of friction parts has miniaturization, the advantages such as precision is high, anti-vibration.Compare micromechanical gyro (MicroElectroMechanicalSystems, MEMS) and optical fibre gyro (InterferometricFiberOpticalGyroscope, IFOG), ROG will have larger advantage.
In resonance type integrated optical gyroscope, the fluctuation of laser power exports except scale factor stability except affecting gyro, also can cause optical kerr effect etc.In addition, when building the two-way closed loop gyrosystem of symmetrical reciprocal structure, higher requirement be it is also proposed to the stability of luminous power, therefore, need to carry out the technical research of loop light power stabilising.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of two-way close loop resonance formula optical gyroscope of optical power feedback is provided.
A two-way close loop resonance formula optical gyroscope for optical power feedback, comprises the optical system that is made up of tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, the first optical modulator, the second optical modulator, optical resonator, photoelectric conversion module and the treatment circuit by totalizer, once demodulation module, secondary frequency demodulation module, the first feedback lock module, the second feedback lock module, the 3rd feedback lock module, the first Feedback of Power module, the second Feedback of Power module composition frequently.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with totalizer, another road first feedback lock module is connected with second optical power control device/frequency shifter, second tunnel is divided into two-way again, and a road is connected with totalizer, and another road second feedback lock module is connected with first optical power control device/frequency shifter.Totalizer is connected with the tuning end of tunable laser through the 3rd feedback lock module.The outlet of secondary frequency demodulation module is divided into two-way, and a road first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
A kind of two-way close loop resonance formula optical gyroscope of optical power feedback comprises by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by subtracter, Gu driver module frequently, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, one tunnel first feedback lock module is connected with second optical power control device/frequency shifter, and a road second feedback lock module is connected with the tuning end of tunable laser.The outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, another road second Feedback of Power module is connected with second optical power control device/frequency shifter, Gu driver module is connected with the first Feedback of Power module frequently, Gu driver module is connected with subtracter with the first feedback lock module frequently.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
A kind of two-way close loop resonance formula optical gyroscope of optical power feedback comprises by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by the first subtracter, second subtracter, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with the first subtracter, another road second feedback lock module is connected with the tuning end of tunable laser, second tunnel is directly connected with the first subtracter, and the first subtracter exports and is connected with second optical power control device/frequency shifter through the first feedback lock module.The outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, another road second Feedback of Power module is connected with second optical power control device/frequency shifter, Gu driver module is connected with the first Feedback of Power module frequently, Gu driver module is connected with the second subtracter with the first feedback lock module frequently.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
A kind of two-way close loop resonance formula optical gyroscope of optical power feedback comprises by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, the optical system that photoelectric conversion module is formed and by once frequently demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, 3rd feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel the 3rd feedback lock module is connected with tunable laser, another road first feedback lock module is connected with second optical power control device/frequency shifter, and the second tunnel is directly through being connected with first optical power control device/frequency shifter through the second feedback lock module.The outlet of secondary frequency demodulation module is divided into two-way, and a road first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
A kind of two-way close loop resonance formula optical gyroscope of optical power feedback comprises by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by subtracter, totalizer, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, 3rd feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with subtracter, another road is connected with totalizer, second tunnel is divided into two-way again, and a road is connected with subtracter, and another road is connected with totalizer.The outlet of secondary frequency demodulation module is divided into two-way, and a road first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter.Subtracter outlet is divided into two-way, and a road is connected with first optical power control device/frequency shifter through the second feedback lock module after exporting and taking advantage of-1, and a road exports and is directly connected with second optical power control device/frequency shifter through the first feedback lock module.Totalizer exports and is connected with the tuning end of tunable laser through the 3rd feedback lock module.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
First described optical power control device/frequency shifter and the second optical power control device/frequency shifter are acousto-optic frequency shifters or optical phase optical modulator.The first described modulation frequency shifter and the second modulation frequency shifter are acousto-optic frequency shifters or optical phase optical modulator.Described optical resonator is optical fiber or integrated optical device.The structure of described optical resonator is transmitted light ring cavity or reflective optic ring cavity.
The beneficial effect that the present invention compared with prior art has:
1) the two-way close loop resonance formula optical gyroscope of optical power feedback provided by the invention is conducive to the stability improving two-way close loop resonance formula optical gyroscope luminous power, improves gyro output stability;
2) the two-way close loop resonance formula optical gyroscope of optical power feedback provided by the invention is conducive to the linearity improving gyrosystem, reduces optics Ke Er noise;
3) the two-way close loop resonance formula optical gyroscope of optical power feedback provided by the invention, is conducive to the symmetry improving gyrosystem, reduces reciprocity noise.
Accompanying drawing explanation
Fig. 1 is the two-way close loop resonance formula optical gyroscope I type structural representation of optical power feedback;
Fig. 2 is the two-way close loop resonance formula optical gyroscope II type structural representation of optical power feedback;
Fig. 3 is the two-way close loop resonance formula optical gyroscope III type structural representation of optical power feedback;
Fig. 4 is the two-way close loop resonance formula optical gyroscope IV type structural representation of optical power feedback;
Fig. 5 is the two-way close loop resonance formula optical gyroscope V-structure schematic diagram of optical power feedback.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing, but the present invention is not limited to this.
As shown in Figure 1, two-way close loop resonance formula optical gyroscope I type of optical power feedback comprises by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by totalizer, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, 3rd feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with totalizer, another road first feedback lock module is connected with second optical power control device/frequency shifter, second tunnel is divided into two-way again, and a road is connected with totalizer, and another road second feedback lock module is connected with first optical power control device/frequency shifter.Totalizer is connected with the tuning end of tunable laser through the 3rd feedback lock module.The outlet of secondary frequency demodulation module is divided into two-way, and a road first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
As shown in Figure 2, two-way close loop resonance formula optical gyroscope II type of optical power feedback comprises the optical system that is made up of tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, the first optical modulator, the second optical modulator, optical resonator, photoelectric conversion module and the treatment circuit by subtracter, solid driver module frequently, once demodulation module, secondary frequency demodulation module, the first feedback lock module, the second feedback lock module, the first Feedback of Power module, the second Feedback of Power module composition frequently.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, one tunnel first feedback lock module is connected with second optical power control device/frequency shifter, and a road second feedback lock module is connected with the tuning end of tunable laser.The outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, another road second Feedback of Power module is connected with second optical power control device/frequency shifter, Gu driver module is connected with the first Feedback of Power module frequently, Gu driver module is connected with subtracter with the first feedback lock module frequently.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
As shown in Figure 3, two-way close loop resonance formula optical gyroscope III type of optical power feedback comprises by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by the first subtracter, second subtracter, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with the first subtracter, another road second feedback lock module is connected with the tuning end of tunable laser, second tunnel is directly connected with the first subtracter, and the first subtracter exports and is connected with second optical power control device/frequency shifter through the first feedback lock module.The outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, another road second Feedback of Power module is connected with second optical power control device/frequency shifter, Gu driver module is connected with the first Feedback of Power module frequently, Gu driver module is connected with the second subtracter with the first feedback lock module frequently.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
As shown in Figure 4, two-way close loop resonance formula optical gyroscope IV type of optical power feedback comprises the optical system that is made up of tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, the first optical modulator, the second optical modulator, optical resonator, photoelectric conversion module and the treatment circuit by once demodulation module, secondary frequency demodulation module, the first feedback lock module, the second feedback lock module, the 3rd feedback lock module, the first Feedback of Power module, the second Feedback of Power module composition frequently.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel the 3rd feedback lock module is connected with tunable laser, another road first feedback lock module is connected with second optical power control device/frequency shifter, and the second tunnel is directly through being connected with first optical power control device/frequency shifter through the second feedback lock module.The outlet of secondary frequency demodulation module is divided into two-way, and a road first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
As shown in Figure 5, the two-way close loop resonance formula optical gyroscope V-type of optical power feedback comprises by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by subtracter, totalizer, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, 3rd feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition.Tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module.Frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with subtracter, another road is connected with totalizer, second tunnel is divided into two-way again, and a road is connected with subtracter, and another road is connected with totalizer.The outlet of secondary frequency demodulation module is divided into two-way, and a road first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter.Subtracter outlet is divided into two-way, and a road is connected with first optical power control device/frequency shifter through the second feedback lock module after exporting and taking advantage of-1, and a road exports and is directly connected with second optical power control device/frequency shifter through the first feedback lock module.Totalizer exports and is connected with the tuning end of tunable laser through the 3rd feedback lock module.The shift frequency amount of first optical power control device/frequency shifter and the second optical power control device/frequency shifter makes difference as gyro output signals.
The first described frequency shifter and the second frequency shifter are acousto-optic frequency shifters or optical phase modulator.The first described modulation frequency shifter and the second modulation frequency shifter are acousto-optic frequency shifters or optical phase modulator.Described optical resonator is optical fiber or integrated optical device.The structure of described optical resonator is transmitted light ring cavity or reflective optic ring cavity.
Can be expressed as by photoelectric conversion module electric signal out:
V PD - out ( t ) = 1 2 P Σ n = - ∞ + ∞ Σ m = - ∞ + ∞ Σ n ′ = - ∞ + ∞ Σ m ′ = - ∞ + ∞ J n ( M 1 ) J m ( M 2 ) J n ′ ( M 1 ) J m ′ ( M 2 ) - - - ( 1 )
expj[((n-n′)Ω 1+(m-m′)Ω 2)t]H (ω(n,m))H (ω(n′,m′))expj(Φ( ω(n,m))-Φ (ω(n′,m′)))
Wherein P=2I 0r v(1-k 1) (1- c1) (1- aOM) (1- pM1) (1- pM2) (1- cL1) (1- cL2), and I 0for entering the light intensity of photoelectric conversion module, R vfor the photoelectric conversion factors of photoelectric conversion module.
We only carry out demodulation to two harmonics, obtain:
V filter - out ( t ) = P &Sigma; n = - &infin; &infin; &Sigma; m = - &infin; &infin; J n ( M 1 ) J n + 2 ( M 1 ) J m 2 ( M 2 ) H ( &omega; ( n , m ) ) H ( &omega; ( n + 2 , m ) ) [ cos < 2 &pi; ( 2 f 1 ) t + &Phi; ( &omega; ( n + 2 , m ) ) - &Phi; ( &omega; ( n , m ) ) > ] = A cos ( 2 &Omega; 1 t ) - B sin ( 2 &Omega; 1 t ) - - - ( 2 )
Wherein
A = P &Sigma; n = - &infin; &infin; &Sigma; m = - &infin; &infin; J n ( M 1 ) J n + 2 ( M 1 ) J m 2 ( M 2 ) H ( &omega; ( n , m ) ) H ( &omega; ( n + 2 , m ) ) cos ( &Phi; ( &omega; ( n + 2 , m ) ) - &Phi; ( &omega; ( n , m ) ) ) - - - ( 3 )
B = P &Sigma; n = - &infin; &infin; &Sigma; m = - &infin; &infin; J n ( M 1 ) J n + 2 ( M 1 ) J m 2 ( M 2 ) H ( &omega; ( n , m ) ) H ( &omega; ( n + 2 , m ) ) sin ( &Phi; ( &omega; ( n + 2 , m ) ) - &Phi; ( &omega; ( n , m ) ) ) - - - ( 4 )
Following reference signal goes to carry out demodulation, obtains:
V out ( t ) = 0.5 DU ref P &Sigma; n = - &infin; &infin; &Sigma; m = - &infin; &infin; J n ( M 1 ) J n + 2 ( M 1 ) J m 2 ( M 2 ) - - - ( 5 )
H (ω(n,m))H (ω(n+2,m))cos(Φ (ω(n+2,m))-Φ (ω(n,m)))
If as can be seen from the above equation when other parameters are all fixed, two frequency multiplication demodulation export and enter chamber power and be directly proportional, and that is we can characterize into chamber power by two frequency multiplication demodulation result.
In the resonance type optical gyroscope of optical power feedback, specific implementation is by following description:
The laser that frequency-tunable laser sends is divided into the two-beam of constant power after isolator and coupling mechanism: up time needle path and inverse time needle path.Up time needle path laser is respectively through optical power control device/frequency shifter shift frequency, here optical power control device/frequency shifter can by the realization such as acousto-optic frequency shifters or phase-modulator, then enter modulation /demodulation module to modulate light and be input to optics ring resonator by circulator again, here optics ring resonator can be device and the form that any one can form resonator cavity, that comprise transmission-type with reflective optical fiber, integrated optical device etc., modulation can by signal source instrument or circuit realiration, be input to photodetector by circulator form clockwise harmonic light in chamber after and carry out opto-electronic conversion, again through the demodulation of modulation /demodulation module, once demodulation module can be realized by lock-in amplifier frequently, finally demodulation is exported light path before servo loop goes to control to control through frequency shifter shift frequency amount, realize up time needle path frequency shifter loop-locking, inverse time needle path frequency shifter loop-locking and up time needle path frequency shifter loop-locking are in like manner, secondary frequency demodulation module can be realized by lock-in amplifier, finally demodulation is exported light path institute before servo loop goes to control to control through optical power control device driving power, realize up time needle path luminous power loop-locking, inverse time needle path luminous power loop-locking and up time needle path luminous power loop-locking are in like manner.
Acousto-optic frequency shifters and phase-modulator are through being often used as frequency shifter, also optical power control device can be it can be used as to use by changing its driving power size simultaneously, lock-in amplifier not only can be used as once demodulation frequently, also can be used as secondary frequency demodulation simultaneously, therefore the resonance type optical gyroscope of this Feedback of Power does not introduce extra device relative to resonance type optical gyroscope before, improves the performance of gyrosystem while low-power consumption.
It is to be noted, the frequency shifter applied in this embodiment, modulation demodulation system, optical resonator should comprise the frequency shifter that any one can be applicable in resonance type optical gyroscope, modulation demodulation system and optical resonator, and modulator is can diverse location in systems in which, that is, only to optical power control device on the basis of the present embodiment, frequency shifter, modulation demodulation system and optical resonator, and the change that the position of modulator and form are made, and, based on the resonance type optical gyroscope of the various forms two-way closed loop of the optical power feedback of secondary frequency demodulation, as shown in above-mentioned various implementation, all should fall in the corresponding claims of the present invention.

Claims (8)

1. the two-way close loop resonance formula optical gyroscope of an optical power feedback, it is characterized in that comprising by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by totalizer, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, 3rd feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition, tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module, frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with totalizer, another road first feedback lock module is connected with second optical power control device/frequency shifter, second tunnel is divided into two-way again, and a road is connected with totalizer, and another road second feedback lock module is connected with first optical power control device/frequency shifter, totalizer is connected with the tuning end of tunable laser through the 3rd feedback lock module, the outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter.
2. the two-way close loop resonance formula optical gyroscope of an optical power feedback, it is characterized in that comprising by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by subtracter, Gu driver module frequently, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition, tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module, photoelectric conversion module outlet respectively with once frequently demodulation module, secondary frequency demodulation module is connected, once demodulation module outlet is frequently divided into two-way, one tunnel first feedback lock module is connected with second optical power control device/frequency shifter, one tunnel second feedback lock module is connected with the tuning end of tunable laser, the outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, another road second Feedback of Power module is connected with second optical power control device/frequency shifter, Gu driver module is connected with the first Feedback of Power module frequently, Gu driver module is connected with subtracter with the first feedback lock module frequently.
3. the two-way close loop resonance formula optical gyroscope of an optical power feedback, it is characterized in that comprising by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by the first subtracter, second subtracter, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition, tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module, photoelectric conversion module outlet respectively with once frequently demodulation module, secondary frequency demodulation module is connected, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with the first subtracter, another road second feedback lock module is connected with the tuning end of tunable laser, second tunnel is directly connected with the first subtracter, first subtracter exports and is connected with second optical power control device/frequency shifter through the first feedback lock module, the outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, another road second Feedback of Power module is connected with second optical power control device/frequency shifter, Gu driver module is connected with the first Feedback of Power module frequently, Gu driver module is connected with the second subtracter with the first feedback lock module frequently.
4. a two-way close loop resonance formula optical gyroscope for optical power feedback, is characterized in that comprising the optical system that is made up of tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, the first optical modulator, the second optical modulator, optical resonator, photoelectric conversion module and the treatment circuit by once demodulation module, secondary frequency demodulation module, the first feedback lock module, the second feedback lock module, the 3rd feedback lock module, the first Feedback of Power module, the second Feedback of Power module composition frequently, tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module, photoelectric conversion module outlet respectively with once frequently demodulation module, secondary frequency demodulation module is connected, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel the 3rd feedback lock module is connected with tunable laser, another road first feedback lock module is connected with second optical power control device/frequency shifter, second tunnel is directly through being connected with first optical power control device/frequency shifter through the second feedback lock module, the outlet of secondary frequency demodulation module is divided into two-way, one tunnel first Feedback of Power module is connected with first optical power control device/frequency shifter, another road second Feedback of Power module is connected with second optical power control device/frequency shifter.
5. the two-way close loop resonance formula optical gyroscope of an optical power feedback, it is characterized in that comprising by tunable laser, optical splitters, first optical power control device/frequency shifter, second optical power control device/frequency shifter, first optical modulator, second optical modulator, optical resonator, photoelectric conversion module form optical system and by subtracter, totalizer, once frequency demodulation module, secondary frequency demodulation module, first feedback lock module, second feedback lock module, 3rd feedback lock module, first Feedback of Power module, the treatment circuit of the second Feedback of Power module composition, tunable laser is connected with optical splitters, optical splitters outlet is connected with first optical power control device/frequency shifter, second optical power control device/frequency shifter respectively, first optical power control device/frequency shifter outlet is connected with optical resonator through the first optical modulator, second optical power control device/frequency shifter is connected with optical resonator through the second optical modulator, and optical resonator outlet is connected with photoelectric conversion module, frequently demodulation module, secondary frequency demodulation module are connected respectively with once in photoelectric conversion module outlet, once demodulation module outlet is frequently divided into two-way, the first via is divided into two-way again, one tunnel is connected with subtracter, another road is connected with totalizer, and the second tunnel is divided into two-way again, and a road is connected with subtracter, another road is connected with totalizer
The outlet of secondary frequency demodulation module is divided into two-way, and a road first Feedback of Power module is connected with first optical power control device/frequency shifter, and another road second Feedback of Power module is connected with second optical power control device/frequency shifter,
Subtracter outlet is divided into two-way, one tunnel is connected with first optical power control device/frequency shifter through the second feedback lock module after exporting and taking advantage of-1, one tunnel exports and is directly connected with second optical power control device/frequency shifter through the first feedback lock module, and totalizer exports and is connected with the tuning end of tunable laser through the 3rd feedback lock module.
6. the two-way close loop resonance formula optical gyroscope of a kind of optical power feedback according to claim 1,2,3,4 or 5, is characterized in that first described optical power control device/frequency shifter and the second optical power control device/frequency shifter are acousto-optic frequency shifters or optical phase optical modulator.
7. the two-way close loop resonance formula optical gyroscope of a kind of optical power feedback according to claim 1,2,3,4 or 5, is characterized in that described optical resonator is optical fiber or integrated optical device.
8. the two-way close loop resonance formula optical gyroscope of a kind of optical power feedback according to claim 1,2,3,4 or 5, is characterized in that the structure of described optical resonator is transmitted light ring cavity or reflective optic ring cavity.
CN201310602722.XA 2013-11-25 2013-11-25 The two-way close loop resonance formula optical gyroscope of optical power feedback Active CN103712614B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310602722.XA CN103712614B (en) 2013-11-25 2013-11-25 The two-way close loop resonance formula optical gyroscope of optical power feedback

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310602722.XA CN103712614B (en) 2013-11-25 2013-11-25 The two-way close loop resonance formula optical gyroscope of optical power feedback

Publications (2)

Publication Number Publication Date
CN103712614A CN103712614A (en) 2014-04-09
CN103712614B true CN103712614B (en) 2016-03-23

Family

ID=50405776

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310602722.XA Active CN103712614B (en) 2013-11-25 2013-11-25 The two-way close loop resonance formula optical gyroscope of optical power feedback

Country Status (1)

Country Link
CN (1) CN103712614B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113959427B (en) * 2021-10-22 2022-08-02 北京航空航天大学 Novel modulation-based real-time tracking method for closed-loop feedback coefficient of integrated optical gyroscope

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101149265A (en) * 2007-11-15 2008-03-26 北京航空航天大学 Micro optical peg-top modulation/demodulation and feedback control device
CN102331258A (en) * 2011-07-12 2012-01-25 浙江大学 Two-path loop-locked resonant mode optical gyro
CN102353373A (en) * 2011-07-12 2012-02-15 浙江大学 Double-closed loop locking technology-based resonant optical gyro
CN102519445A (en) * 2011-12-07 2012-06-27 浙江大学 Resonance optic gyro based on digital phase oblique wave frequency shift technology
CN103335642A (en) * 2013-06-14 2013-10-02 湖北航天技术研究院总体设计所 Optical fiber gyroscope closed-loop control method based on power feedback type super luminescent diode (SLD) and optical fiber gyroscope

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101149265A (en) * 2007-11-15 2008-03-26 北京航空航天大学 Micro optical peg-top modulation/demodulation and feedback control device
CN102331258A (en) * 2011-07-12 2012-01-25 浙江大学 Two-path loop-locked resonant mode optical gyro
CN102353373A (en) * 2011-07-12 2012-02-15 浙江大学 Double-closed loop locking technology-based resonant optical gyro
CN102519445A (en) * 2011-12-07 2012-06-27 浙江大学 Resonance optic gyro based on digital phase oblique wave frequency shift technology
CN103335642A (en) * 2013-06-14 2013-10-02 湖北航天技术研究院总体设计所 Optical fiber gyroscope closed-loop control method based on power feedback type super luminescent diode (SLD) and optical fiber gyroscope

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
双路闭环谐振式微光学陀螺;王文怡;《中国激光》;20121231;第39卷(第12期);1-5 *
基于单片机FPGA的谐振式光纤陀螺数字系统设计与实现;姚灵芝;《传感技术学报》;20110930;第24卷(第9期);1260-1264 *

Also Published As

Publication number Publication date
CN103712614A (en) 2014-04-09

Similar Documents

Publication Publication Date Title
CN103712615B (en) The single channel close loop resonance formula optical gyroscope of optical power feedback
CN103438882B (en) A kind of optical fibre gyro of low scale factor error
JP5362180B2 (en) Asynchronous demodulation of fiber optic gyroscope
CN102353373B (en) Double-closed loop locking technology-based resonant optical gyro
CN103697880B (en) A kind of optical fibre gyro of low random walk coefficient
CN103471579A (en) Angular velocity detection method adopting two-way full reciprocity coupling optoelectronic oscillator
CN104075704A (en) Digital closed loop optical fiber gyroscope with double-interferometer system
CN102331258B (en) Two-path loop-locked resonant mode optical gyro
US11874113B2 (en) Bidirectional optical-carrying microwave resonance system based on circulator structure and method for detecting angular velocity by said system
Ying et al. A miniaturized compact open-loop RFOG with demodulation signal compensation technique to suppress intensity modulation noise
US11378401B2 (en) Polarization-maintaining fully-reciprocal bi-directional optical carrier microwave resonance system and angular velocity measurement method thereof
Lei et al. Experiments on resonator micro-optic gyro using external cavity laser diode
CN103712614B (en) The two-way close loop resonance formula optical gyroscope of optical power feedback
CN102519446B (en) Resonant optical gyroscope based on fast-speed high-precision frequency tracking and locking technology
CN1228609C (en) Beat frequency detection method for travelling-wave annular resonance cavity of non-mechanical gyro
CN104729494A (en) Resonant hollow-core photonic crystal fiber gyroscope and application
CN103033178B (en) Laser gyroscope offset frequency method based on external cavity feedback
CN101793997B (en) Ring resonator
Yang et al. New measurement method for eigen frequency of a fiber optic gyroscope
Liu et al. Analysis of laser intensity noise and the compensation technology in resonator fiber-optic gyroscope
CN104991394A (en) Mach-Zehnder optical fiber interferometer stable control system
Zhang et al. Open-loop experiments of resonator micro-optic gyro
Zhang et al. New optical suppression technology of relative intensity noise for fiber optic gyroscope
Hua et al. Effect of input intensity fluctuation of fiber ring resonator on resonator fiber optic gyroscope
Guo et al. Transfer function of optical waveguide ring resonator in frequency domain for micro-optic gyro

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant