CN109556594A - Optical fibre gyro based on fiber annular resonant cavity inducing transparent and sink effect - Google Patents
Optical fibre gyro based on fiber annular resonant cavity inducing transparent and sink effect Download PDFInfo
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- 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
- G01C19/725—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 nxn optical couplers, e.g. 3x3 couplers
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Abstract
The present invention provides a kind of optical fibre gyro based on fiber annular resonant cavity inducing transparent and sink effect, include three fiber annular resonant cavities, there are the light waves that two transmit in opposite directions in first fiber annular resonant cavity, there is only the light waves of first direction transmission in second fiber annular resonant cavity, there is only the light waves of second direction transmission in third fiber annular resonant cavity, and first direction is opposite with second direction.First fiber annular resonant cavity and the second fiber annular resonant cavity interact, generate inducing transparent effect, first fiber annular resonant cavity and third fiber annular resonant cavity interact, generate induced absorption effect, rotation speed size is obtained by the difference of both inducing transparent effect, induced absorption effect centre frequency, rotation speed direction is obtained by the relative position of both inducing transparent effect, induced absorption effect.The configuration of the present invention is simple, precision are high, do not include phase modulator, can differentiate rotation speed direction not carrying out phase-modulation to optical signal.
Description
Technical field
The present invention relates to the technical fields of optical fibre gyro, and in particular to one kind based on fiber annular resonant cavity inducing transparent and
The optical fibre gyro of sink effect.
Background technique
1976, the V. Vali and R. W. Shorthill of Utah university, the U.S. successfully had developed first light in the world
Fine gyro, optical fibre gyro just start the advantages that fast, the service life is long, low in energy consumption, small in size with it, cause world's model once appearance
Interior extensive concern is enclosed, and is developed by leaps and bounds.The working principle of optical fibre gyro is based on Sagnac effect, i.e. light wave is passing
During defeated, due to the rotation in relative inertness space, additional phase can be generated.Currently, traditional resonance type optical fiber gyro is adopted
It is a fiber annular resonant cavity, when gyro rotation, resonance frequency of the light wave in fiber annular resonant cavity can be with rotation
Rotary speed and change, for the two-beam wave transmitted in opposite directions in fiber annular resonant cavity, the transmission direction of the two is on the contrary, wherein
The transmission direction of a branch of light wave is identical as rotation speed direction, and the transmission direction of another Shu Guangbo and rotation speed direction are not
Together, therefore, the resonance frequency for the light wave that this two beam transmits in opposite directions is different, and the difference between the two resonance frequency and rotation speed
Degree size is directly proportional, so by detecting the resonant frequency difference value between the light wave that two beams transmit in opposite directions in resonance type optical fiber gyro,
It can measure rotation speed size.
But for traditional resonance type optical fiber gyro, only one fiber annular resonant cavity, the resonance spectrum of light wave compared with
Width causes the precision of gyro to be difficult to further be promoted；On the other hand, two light waves transmitted in opposite directions in gyro are in same fiber optic loop
Resonance occurs in shape resonant cavity, the resonance spectrum of two light waves is identical, cannot be distinguished, accordingly, it is difficult to differentiate rotation speed direction, needs
The signal processing system of the optical devices such as phase-modulator and complexity is added, rotation speed direction, this resolution rotation could be differentiated
The mode in rotary speed direction increases the complexity of gyro system structure, introduces corresponding noise, and further reduced top
The precision of spiral shell.
Summary of the invention
It is an object of the invention to overcome, current resonance type optical fiber gyro precision is low, structure is complicated, is difficult to differentiate rotation speed
The problem of spending direction, proposes a kind of optical fibre gyro based on fiber annular resonant cavity inducing transparent and sink effect.
The technical solution of the present invention is to provide a kind of optical fiber based on fiber annular resonant cavity inducing transparent and sink effect
Gyro includes:
Sequentially connected voltage signal source, laser, Polarization Controller, the first fiber optic splitter；
First fiber optic splitter is separately connected with the second fiber optic splitter, third fiber optic splitter；
Fiber coupler is also separately connected with second fiber optic splitter, third fiber optic splitter；
First fiber optic loop connects the fiber coupler and 3 × 3 fiber couplers form the first fiber annular resonant cavity, the first light
There is the light wave transmitted in opposite directions with first direction and second direction in fine ring resonator；
Second fiber optic loop connects 3 × 3 fiber coupler and the second fibre optic isolater forms the second fiber annular resonant cavity, the
There is the light wave transmitted with first direction in two fiber annular resonant cavities；
Third fiber optic loop connects 3 × 3 fiber coupler and the first fibre optic isolater forms third fiber annular resonant cavity, the
There is the light wave transmitted with second direction in three fiber annular resonant cavities；
Wherein, first fiber annular resonant cavity and the second fiber annular resonant cavity are occurred mutual by 3 × 3 fiber couplers
Effect generates inducing transparent effect；First fiber annular resonant cavity and third fiber annular resonant cavity pass through 3 × 3 optical fiber
Coupler interacts, and generates induced absorption effect.
Optionally, the optical fibre gyro further includes:
The first detector being connect with second fiber optic splitter；
The second detector being connect with the third fiber optic splitter；
The signal processing system being separately connected with first detector, the second detector；
First fiber annular resonant cavity and inducing transparent effect caused by the interaction of the second fiber annular resonant cavity are saturating
It penetrates spectrum to be exported by the fiber coupler, and is detected through the third fiber optic splitter into the second detector and be changed into telecommunications
After number, signal processing system is sent into generate the centre frequency of inducing transparent effect；
First fiber annular resonant cavity and induced absorption effect caused by the interaction of third fiber annular resonant cavity are saturating
It penetrates spectrum to be exported by the fiber coupler, and is detected through second fiber optic splitter into the first detector and be changed into telecommunications
After number, send to signal processing system and generate the centre frequency of induced absorption effect；
The signal processing system is obtained according to the centre frequency of inducing transparent effect and the difference of induced absorption effect centre frequency
Obtain rotation speed size；Also according to the relative position of inducing transparent effect and induced absorption effect, rotation speed direction is obtained；It should
The gyro output signals of signal processing system output include rotation speed size, rotation speed direction.
Optionally, the modulated signal input terminal of the electrical signal connecting laser of the voltage signal source, laser
Light output end connection Polarization Controller light input end, the light output end of Polarization Controller connects the light of the first fiber optic splitter
Input terminal；
First light output end of first fiber optic splitter connects the light input end of the second fiber optic splitter, the first fiber beam splitting
The light input end of the second light output end connection third fiber optic splitter of device；The light input/output port of second fiber optic splitter connects
First light input/output port of fiber coupler, the second of the light input/output port connection fiber coupler of third fiber optic splitter
Light input/output port.
Optionally, third light input/output port, 3 × 3 fiber couplers of the first fiber optic loop connection fiber coupler
The first light input/output port, the second light input/output port of 3 × 3 fiber couplers, the 4th light input of fiber coupler it is defeated
Outlet；
Second fiber optic loop connects the light input of the third light input/output port of 3 × 3 fiber couplers, the second fibre optic isolater
End, the light output end of the second fibre optic isolater, 3 × 3 fiber couplers the 4th light input/output port；
The third fiber optic loop connects the light input of the 5th light input/output port of 3 × 3 fiber couplers, the first fibre optic isolater
End, the light output end of the first fibre optic isolater, 3 × 3 fiber couplers the 6th light input/output port.
Optionally, the light output end of the second fiber optic splitter connects the light input end of the first detector, the first detector
First electric signal input end of electrical signal connection signal processing system；The light output end connection the of third fiber optic splitter
The light input end of two detectors, the second electric signal input of the electrical signal connection signal processing system of the second detector
End；The electrical signal of signal processing system exports gyro output signals.
Optionally, the signal processing system includes bandwidth-limited circuit, amplifying circuit, extracts circuit, difference output electricity
Road:
First electric signal input end of the electrical signal connection bandwidth-limited circuit of first detector, the second detector
Electrical signal connection bandwidth-limited circuit the second electric signal input end, the electrical signal of bandwidth-limited circuit connects
The electric signal input end of amplifying circuit is connect, the electrical signal connection of amplifying circuit is extracted the electric signal input end of circuit, mentioned
The electric signal input end of the electrical signal connection difference output circuit of sense circuit, the electrical signal of difference output circuit
Export gyro output signals.
Optionally, the triangle wave voltage signal of voltage signal source output is loaded into laser to tune laser output
The frequency of light；The output light of laser enters Polarization Controller, to select the polarization state of light；The output light of Polarization Controller is through
Light is divided into two bundles after one fiber optic splitter；
The wherein light beam of first fiber optic splitter output enters the first fiber optic loop through the second fiber optic splitter, fiber coupler
Resonance is transmitted and occurred in shape resonant cavity with first direction, it is humorous also to enter the second fiber annular when by 3 × 3 fiber coupler
It is transmitted in vibration chamber with first direction and resonance occurs；First fiber annular resonant cavity and the second fiber annular resonant cavity pass through 3 × 3
Fiber coupler interacts, defeated by selecting the third light input/output port of 3 × 3 fiber couplers, the 4th light to input
The coupling ratio of outlet makes the first fiber annular resonant cavity and the second fiber annular resonant cavity interact and generate inducing transparent
Effect；
The another light beam of first fiber optic splitter output enters the first fiber annular through third fiber optic splitter, fiber coupler
Resonance is transmitted and occurred in resonant cavity with second direction, also by entering third fiber annular resonance when 3 × 3 fiber coupler
It is transmitted in chamber with second direction and resonance occurs；First fiber annular resonant cavity and third fiber annular resonant cavity pass through 3 × 3 light
Fine coupler interacts, by the 5th light input/output port, the 6th smooth input and output that select 3 × 3 fiber couplers
The coupling ratio at end makes the first fiber annular resonant cavity and third fiber annular resonant cavity interact and generates induced absorption effect
It answers.
Optionally, the centre frequency of inducing transparent effect changes with rotation speed, when rotation speed direction is second direction
When, the centre frequency of inducing transparent effect is mobile to high frequency direction, when rotation speed direction is first direction, inducing transparent effect
The centre frequency answered is mobile to low frequency direction, and rotation speed is bigger, and the offset of the centre frequency of inducing transparent effect is bigger；
The centre frequency of induced absorption effect changes with rotation speed, when rotation speed direction is second direction, induced absorption
The centre frequency of effect is mobile to low frequency direction, when rotation speed direction is first direction, the center frequency of induced absorption effect
Rate is mobile to high frequency direction, and rotation speed is bigger, and the offset of the centre frequency of induced absorption effect is bigger；
When rotation speed is zero, the centre frequency of inducing transparent effect is identical as the centre frequency of induced absorption effect, works as rotation
When rotary speed direction is second direction, the centre frequency of inducing transparent effect is mobile to high frequency direction, and induced absorption effect
Centre frequency is mobile to low frequency direction；When rotation speed direction is first direction, the centre frequency of inducing transparent effect is to low
Frequency direction is mobile, and the centre frequency of induced absorption effect is mobile to high frequency direction；And rotation speed is bigger, inducing transparent effect
Centre frequency and the centre frequency of induced absorption effect offset it is bigger.
Optionally, first direction is counterclockwise that second direction is clockwise.
Optionally, first fiber optic loop, the second fiber optic loop, the air core coil that third fiber optic loop is optical fiber coiling, three
Using the identical optical fiber of specification, and optical fiber ring length is identical.
Compared with prior art, the optical fiber top of the present invention based on fiber annular resonant cavity inducing transparent and sink effect
Spiral shell includes three fiber annular resonant cavities, and there are the light wave that two transmit in opposite directions, the second fiber optic loops in the first fiber annular resonant cavity
There is only the light wave of single transmission direction in shape resonant cavity, there is only the light of single transmission direction in third fiber annular resonant cavity
Wave, and in the second fiber annular resonant cavity in the transmission direction of light wave and third fiber annular resonant cavity light wave transmission direction
On the contrary.
First fiber annular resonant cavity and the second fiber annular resonant cavity interact, generation inducing transparent effect, and first
Fiber annular resonant cavity and third fiber annular resonant cavity interact, and generate induced absorption effect, by inducing transparent effect, sense
The difference of both sink effects centre frequency is answered to obtain rotation speed size, by both inducing transparent effect, induced absorption effect
Relative position obtain rotation speed direction.
The configuration of the present invention is simple, precision are high, do not include phase modulator, can divide not carrying out phase-modulation to optical signal
Distinguish rotation speed direction.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the electrical block diagram of signal processing system in Fig. 1.
Specific embodiment
Referring to shown in Fig. 1, Fig. 2, one kind provided by the invention is based on fiber annular resonant cavity inducing transparent and absorption for cooperation
The optical fibre gyro of effect includes voltage signal source 1, laser 2, Polarization Controller 3, the first fiber optic splitter 4, the first detector
5, the second fiber optic splitter 6, fiber coupler 7, the first fiber optic loop 8, the second fiber optic loop 9, third fiber optic loop 10,3 × 3 optical fiber couplings
Clutch 11, the first fibre optic isolater 12, the second fibre optic isolater 13, third fiber optic splitter 14, the second detector 15, at signal
Reason system 16.
The modulated signal input terminal of the electrical signal connecting laser 2 of voltage signal source 1, the light output of laser 2
The light input end of end connection Polarization Controller 3, the light output end of Polarization Controller 3 connect the light input of the first fiber optic splitter 4
End.
First light output end of the first fiber optic splitter 4 connects the light input end of the second fiber optic splitter 6, the first optical fiber point
The light input end of the second light output end connection third fiber optic splitter 14 of beam device 4；The light input and output of second fiber optic splitter 6
First light input/output port of end connection fiber coupler 7, the light input/output port of third fiber optic splitter 14 connect optical fiber coupling
Second light input/output port of clutch 7.
First fiber optic loop 8, the second fiber optic loop 9, the air core coil that third fiber optic loop 10 is optical fiber coiling；First fiber optic loop 8,
Second fiber optic loop 9, third fiber optic loop 10, three uses the identical optical fiber of specification, and optical fiber ring length is identical (in figure only
Facilitate and be displayed separately and adjust ratio, the specification of three be actually coiled into fiber optic loop is identical).
First fiber optic loop 8 connects the first light of the third light input/output port of fiber coupler 7,3 × 3 fiber couplers 11
Input/output terminal, the second light input/output port of 3 × 3 fiber couplers 11, fiber coupler 7 the 4th light input/output port；
First fiber optic loop 8, fiber coupler 7,3 × 3 fiber couplers 11 constitute the first fiber annular resonant cavity, and the first fiber annular is humorous
There are the light waves that two transmit in opposite directions in vibration chamber.
Second fiber optic loop 9 connects the third light input/output ports of 3 × 3 fiber couplers 11, the second fibre optic isolater 13
Light input end, the light output end of the second fibre optic isolater 13,3 × 3 fiber couplers 11 the 4th light input/output port；Second light
Fine ring 9,3 × 3 fiber couplers 11, the second fibre optic isolater 13 constitute the second fiber annular resonant cavity, and the second fiber annular is humorous
There is only the light waves of single transmission direction in vibration chamber.
Third fiber optic loop 10 connects the 5th light input/output port of 3 × 3 fiber couplers 11, the first fibre optic isolater 12
Light input end, the light output end of the first fibre optic isolater 12,3 × 3 fiber couplers 11 the 6th light input/output port；Third light
Fine ring 10,3 × 3 fiber couplers 11, the first fibre optic isolater 12 constitute third fiber annular resonant cavity, and third fiber annular is humorous
There is only the light waves of single transmission direction in vibration chamber；The transmission direction of light wave and third fiber optic loop in second fiber annular resonant cavity
The transmission direction of light wave is opposite in shape resonant cavity.
Wherein, by 3 × 3 fiber couplers 11 phase occurs for the first fiber annular resonant cavity with the second fiber annular resonant cavity
Interaction generates inducing transparent effect；First fiber annular resonant cavity and third fiber annular resonant cavity pass through 3 × 3 optical fiber couplings
Clutch 11 interacts, and generates induced absorption effect；By both inducing transparent effect, induced absorption effect centre frequency
Difference obtains rotation speed size；Rotation speed side is obtained by the relative position of both inducing transparent effect, induced absorption effect
To.
The light output end of second fiber optic splitter 6 connects the light input end of the first detector 5, the telecommunications of the first detector 5
First electric signal input end of number output end connection signal processing system 16；The light output end connection the of third fiber optic splitter 14
The light input end of two detectors 15, the second electric signal of the electrical signal connection signal processing system 16 of the second detector 15
Input terminal；The electrical signal of signal processing system 16 exports gyro output signals.
The signal processing system 16 includes bandwidth-limited circuit 16-1, amplifying circuit 16-2, extracts circuit 16-3, difference
Output circuit 16-4:
The first electric signal input end of the electrical signal connection bandwidth-limited circuit 16-1 of first detector 5, the second detection
The second electric signal input end of the electrical signal connection bandwidth-limited circuit 16-1 of device 15, the electricity of bandwidth-limited circuit 16-1
Signal output end connects the electric signal input end of amplifying circuit 16-2, and electricity is extracted in the electrical signal connection of amplifying circuit 16-2
The electric signal input end of road 16-3, the electric signal for extracting the electrical signal connection difference output circuit 16-4 of circuit 16-3 are defeated
Enter end, the electrical signal of difference output circuit 16-4 exports gyro output signals.
Working principle: first fiber optic loop 8, fiber coupler 7,3 × 3 fiber couplers 11 constitute the first fiber annular
Resonant cavity, (in the example of Fig. 1, two light wave transmissions directions are the light wave transmitted in opposite directions in the first fiber annular resonant cavity there are two
Clockwise, counterclockwise)；Second fiber optic loop 9,3 × 3 fiber couplers 11, the second fibre optic isolater 13 are constituted
Second fiber annular resonant cavity, there is only the light wave of single transmission direction, (exemplary light wave is passed in the second fiber annular resonant cavity
Defeated direction is counterclockwise)；The third fiber optic loop 10,3 × 3 fiber couplers 11, the first fibre optic isolater 12 constitute the
Three fiber annular resonant cavities, there is only the light wave of single transmission direction (exemplary light wave transmissions in third fiber annular resonant cavity
Direction is clockwise).
1 output signal of voltage signal source is triangle wave voltage signal, the tune of this triangle wave voltage signal loading to laser 2
Signal input part processed can obtain at the first detector 5, the second detector 15 in this way for the frequency of 2 output light of tuned laser
The transmission spectrum of inducing transparent effect and induced absorption effect in of the invention is obtained, the output light of laser 2 enters Polarization Controller 3,
The polarization state of light is selected, the output light of Polarization Controller 3 is divided into two bundles light after the first fiber optic splitter 4, and wherein light beam passes through
Second fiber optic splitter 6, fiber coupler 7 enter the first fiber annular resonant cavity, the inverse time in the first fiber annular resonant cavity
Needle transmits and occurs resonance, and the light wave of counterclockwise transmission passes through 3 × 3 fiber couplers 11 in the first fiber annular resonant cavity
When, the second fiber annular resonant cavity, third fiber annular resonant cavity can be entered simultaneously, and inverse in the second fiber annular resonant cavity
Hour hands transmit and occur resonance, but the transmission direction of the light wave due to entering in third fiber annular resonant cavity counterclockwise and the
The conducting direction of one fibre optic isolater 12 on the contrary, therefore can not be transmitted in third fiber annular resonant cavity and resonance occurs, this
Sample, the light wave of counterclockwise transmission, can pass in the first fiber annular resonant cavity, the second fiber annular resonant cavity in the present invention
It is defeated and resonance occurs, and the first fiber annular resonant cavity and the second fiber annular resonant cavity pass through 3 × 3 fiber couplers 11 and send out
Raw interaction, the coupling of third light input/output port, the 4th light input/output port by selecting 3 × 3 fiber couplers 11
Than the first fiber annular resonant cavity and the second fiber annular resonant cavity can be made to interact and generate inducing transparent effect, incuded
The centre frequency of transparent effect can change with rotation speed, when rotation speed direction is clockwise, in inducing transparent effect
Frequency of heart is then mobile to high frequency direction, and when rotation speed direction is counterclockwise, the centre frequency of inducing transparent effect is then to low
Frequency direction is mobile, and rotation speed is bigger, and the offset of the centre frequency of inducing transparent effect is bigger, the first fiber annular resonance
Chamber is exported with inducing transparent effect transmission spectrum caused by the interaction of the second fiber annular resonant cavity by fiber coupler 7, and
Enter the second detector 15 through third fiber optic splitter 14, after being detected by the second detector 15 and be changed into electric signal, is sent into letter
Number processing system 16.
The another light beam of first fiber optic splitter 4 output enters first through third fiber optic splitter 14, fiber coupler 7
Clockwise transmission and resonance occurs for fiber annular resonant cavity in the first fiber annular resonant cavity, in the first fiber annular resonance
When the light wave of clockwise transmission passes through 3 × 3 fiber coupler 11 in chamber, the second fiber annular resonant cavity, third can be entered simultaneously
Fiber annular resonant cavity, and clockwise transmission and resonance occurs in third fiber annular resonant cavity, but due to entering clockwise
Therefore the conducting direction of the transmission direction of light wave in second fiber annular resonant cavity and the second fibre optic isolater 13 is not on the contrary, can
It is transmitted in the second fiber annular resonant cavity and resonance occurs, it, can be the in this way, the light wave of clockwise transmission in the present invention
It is transmitted in one fiber annular resonant cavity, third fiber annular resonant cavity and occurs resonance, and the first fiber annular resonant cavity and the
Three fiber annular resonant cavities are interacted by 3 × 3 fiber couplers 11, by select 3 × 3 fiber couplers 11 the
The coupling ratio of five light input/output ports, the 6th light input/output port can make the first fiber annular resonant cavity and third fiber annular
Resonant cavity interacts and generates induced absorption effect, and the centre frequency of induced absorption effect can change with rotation speed, works as rotation
When rotary speed direction is clockwise, the centre frequency of induced absorption effect is then mobile to low frequency direction, when rotation speed direction is
When counterclockwise, the centre frequency of induced absorption effect is then mobile to high frequency direction, and rotation speed is bigger, induced absorption effect
The offset of centre frequency is bigger, sense caused by the first fiber annular resonant cavity and the interaction of third fiber annular resonant cavity
It answers sink effect transmission spectrum to be exported by fiber coupler 7, and enters the first detector 5 through the second fiber optic splitter 6, visited by first
After surveying the detection of device 5 and being changed into electric signal, it is sent into signal processing system 16.
Due to the first fiber optic loop 8, the second fiber optic loop 9, third fiber optic loop 10, three is identical, when rotation speed is zero
When, both inducing transparent effect, induced absorption effect centre frequency are identical, and when rotation speed direction is clockwise, induction is saturating
The centre frequency that obvious results is answered is mobile to high frequency direction, and the centre frequency of induced absorption effect is mobile to low frequency direction；Work as rotation
When directional velocity is counterclockwise, the centre frequency of inducing transparent effect is mobile to low frequency direction, and the center of induced absorption effect
Frequency is mobile to high frequency direction；And rotation speed is bigger, the offset of both inducing transparent effect, induced absorption effect centre frequency
It measures bigger；Therefore, by the difference of both inducing transparent effect, induced absorption effect centre frequency, it can get rotation speed size,
Meanwhile by the relative position of both inducing transparent effect, induced absorption effect, rotation speed direction can get.
After signal processing system 16 receives both inducing transparent effect, induced absorption effects electric signal of transmission spectrum, respectively
The centre frequency for obtaining both inducing transparent effect, induced absorption effect, by inducing transparent effect, induced absorption effect the two
The difference of frequency of heart obtains rotation speed size, meanwhile, by the relative position of both inducing transparent effect, induced absorption effect,
Rotation speed direction is obtained, finally, signal processing system 16 exports gyro output signals, gyro output signals include rotation speed
Size and direction.
The working principle of signal processing system 16: the first fiber annular resonant cavity and third fiber annular resonant cavity phase interaction
With generated induced absorption effect transmission spectrum, after being detected by the first detector 5 and be changed into electric signal, it is sent into bandpass filtering electricity
Road 16-1, meanwhile, inducing transparent caused by the first fiber annular resonant cavity and the interaction of the second fiber annular resonant cavity is imitated
Transmission spectrum is answered, after being detected by the second detector 15 and be changed into electric signal, is also fed into bandwidth-limited circuit 16-1, bandpass filtering electricity
After road 16-1 carries out bandpass filtering to the electric signal of both inducing transparent effect, induced absorption effect transmission spectrum, it is sent to and puts
Big circuit 16-2 is sent to and mentions after amplifying to the electric signal of both inducing transparent effect, induced absorption effect transmission spectrum
Sense circuit 16-3, will after the centre frequency for obtaining both inducing transparent effect, induced absorption effect in extracting circuit 16-3
It is sent into difference output circuit 16-4, in difference output circuit 16-4, by inducing transparent effect, induced absorption effect the two
The difference of frequency of heart obtains rotation speed size, meanwhile, by the relative position of both inducing transparent effect, induced absorption effect,
Rotation speed direction is obtained, finally, difference output circuit 16-4 exports gyro output signals, gyro output signals include rotation speed
Spend size and direction.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of optical fibre gyro based on fiber annular resonant cavity inducing transparent and sink effect, characterized by comprising:
Sequentially connected voltage signal source (1), laser (2), Polarization Controller (3), the first fiber optic splitter (4)；
First fiber optic splitter (4) is separately connected with the second fiber optic splitter (6), third fiber optic splitter (14)；
Fiber coupler (7) is also separately connected with second fiber optic splitter (6), third fiber optic splitter (14)；
First fiber optic loop (8) connects the fiber coupler (7) and 3 × 3 fiber couplers (11) the first fiber annular of formation is humorous
Shake chamber, there is the light wave transmitted in opposite directions with first direction and second direction in the first fiber annular resonant cavity；
Second fiber optic loop (9) connects 3 × 3 fiber coupler (11) and the second fibre optic isolater (13) forms the second fiber optic loop
There is the light wave transmitted with first direction in second fiber annular resonant cavity in shape resonant cavity；
Third fiber optic loop (10) connects 3 × 3 fiber coupler (11) and the first fibre optic isolater (12) forms third optical fiber
There is the light wave transmitted with second direction in third fiber annular resonant cavity in ring resonator；
Wherein, first fiber annular resonant cavity and the second fiber annular resonant cavity are occurred by 3 × 3 fiber couplers (11)
Interaction generates inducing transparent effect；First fiber annular resonant cavity and third fiber annular resonant cavity pass through 3 × 3
Fiber coupler (11) interacts, and generates induced absorption effect.
2. optical fibre gyro as described in claim 1, which is characterized in that the optical fibre gyro further includes:
The first detector (5) being connect with second fiber optic splitter (6)；
The second detector (15) being connect with the third fiber optic splitter (14)；
The signal processing system (16) being separately connected with first detector (5), the second detector (15)；
First fiber annular resonant cavity and inducing transparent effect caused by the interaction of the second fiber annular resonant cavity are saturating
It penetrates spectrum to be exported by the fiber coupler (7), and is detected through the third fiber optic splitter (14) into the second detector (15)
And after being changed into electric signal, signal processing system (16) are sent into generate the centre frequency of inducing transparent effect；
First fiber annular resonant cavity and induced absorption effect caused by the interaction of third fiber annular resonant cavity are saturating
It penetrates spectrum to be exported by the fiber coupler (7), and enters the first detector (5) through second fiber optic splitter (6) and detect simultaneously
After being changed into electric signal, send to signal processing system (16) and generate the centre frequency of induced absorption effect；
The signal processing system (16) is according to the centre frequency of inducing transparent effect and the difference of induced absorption effect centre frequency
Value obtains rotation speed size；Also according to the relative position of inducing transparent effect and induced absorption effect, rotation speed side is obtained
To；The gyro output signals of the signal processing system (16) output include rotation speed size, rotation speed direction.
3. optical fibre gyro as described in claim 1, which is characterized in that
The modulated signal input terminal of the electrical signal connecting laser (2) of the voltage signal source (1), laser (2)
Light output end connects the light input end of Polarization Controller (3), and the light output end of Polarization Controller (3) connects the first fiber optic splitter
(4) light input end；
The light input end of the first light output end connection the second fiber optic splitter (6) of first fiber optic splitter (4), the first light
The light input end of the second light output end connection third fiber optic splitter (14) of fine beam splitter (4)；Second fiber optic splitter (6)
Light input/output port connects first light input/output port of fiber coupler (7), and the light input of third fiber optic splitter (14) is defeated
Outlet connects second light input/output port of fiber coupler (7).
4. optical fibre gyro as described in claim 1, which is characterized in that
The third light input/output port of first fiber optic loop (8) connection fiber coupler (7), 3 × 3 fiber couplers (11)
First light input/output port, the second light input/output port of 3 × 3 fiber couplers (11), the 4th light of fiber coupler (7) are defeated
Enter output end；
Third light input/output port, the second fibre optic isolater of second fiber optic loop (9) connection 3 × 3 fiber couplers (11)
(13) the 4th light input of the light output end, 3 × 3 fiber couplers (11) of light input end, the second fibre optic isolater (13) is defeated
Outlet；
The 5th light input/output port, the first fibre optic isolater of third fiber optic loop (10) connection 3 × 3 fiber couplers (11)
(12) the 6th light input of the light output end, 3 × 3 fiber couplers (11) of light input end, the first fibre optic isolater (12) is defeated
Outlet.
5. optical fibre gyro as claimed in claim 2, which is characterized in that
The light input end of the light output end connection the first detector (5) of second fiber optic splitter (6), the electricity of the first detector (5)
First electric signal input end of signal output end connection signal processing system (16)；The light output end of third fiber optic splitter (14)
Connect the light input end of the second detector (15), the electrical signal connection signal processing system (16) of the second detector (15)
The second electric signal input end；The electrical signal of signal processing system (16) exports gyro output signals.
6. optical fibre gyro as claimed in claim 2, which is characterized in that
The signal processing system (16) include bandwidth-limited circuit (16-1), amplifying circuit (16-2), extract circuit (16-3),
Difference output circuit (16-4):
First electric signal input end of electrical signal connection bandwidth-limited circuit (16-1) of first detector (5),
Second electric signal input end of electrical signal connection bandwidth-limited circuit (16-1) of the second detector (15), bandpass filtering
The electric signal input end of electrical signal connection amplifying circuit (16-2) of circuit (16-1), the telecommunications of amplifying circuit (16-2)
The electric signal input end of circuit (16-3) is extracted in the connection of number output end, and the electrical signal for extracting circuit (16-3) connects difference
The electric signal input end of output circuit (16-4), the electrical signal output gyro output letter of difference output circuit (16-4)
Number.
7. optical fibre gyro as claimed in claim 3, which is characterized in that
The triangle wave voltage signal of voltage signal source (1) output, is loaded into laser (2) to tune laser (2) output light
Frequency；The output light of laser (2) enters Polarization Controller (3), to select the polarization state of light；Polarization Controller (3) it is defeated
Light is divided into two bundles light after the first fiber optic splitter (4) out；
The wherein light beam of first fiber optic splitter (4) output enters the through the second fiber optic splitter (6), fiber coupler (7)
Resonance is transmitted and occurred in one fiber annular resonant cavity with first direction, the is also entered when by 3 × 3 fiber couplers (11)
It is transmitted in two fiber annular resonant cavities with first direction and resonance occurs；First fiber annular resonant cavity and the second fiber annular are humorous
Vibration chamber is interacted by 3 × 3 fiber couplers (11), by selecting the third light of 3 × 3 fiber couplers (11) to input
The coupling ratio of output end, the 4th light input/output port keeps the first fiber annular resonant cavity and the second fiber annular resonant cavity mutual
It acts on and generates inducing transparent effect；
The another light beam of first fiber optic splitter (4) output enters the through third fiber optic splitter (14), fiber coupler (7)
Resonance is transmitted and occurred in one fiber annular resonant cavity with second direction, the is also entered when by 3 × 3 fiber couplers (11)
It is transmitted in three fiber annular resonant cavities with second direction and resonance occurs；First fiber annular resonant cavity and third fiber annular are humorous
Vibration chamber is interacted by 3 × 3 fiber couplers (11), by selecting the 5th light of 3 × 3 fiber couplers (11) to input
The coupling ratio of output end, the 6th light input/output port keeps the first fiber annular resonant cavity and third fiber annular resonant cavity mutual
It acts on and generates induced absorption effect.
8. optical fibre gyro as claimed in claim 1 or 7, which is characterized in that
The centre frequency of inducing transparent effect changes with rotation speed, when rotation speed direction is second direction, inducing transparent
The centre frequency of effect is mobile to high frequency direction, when rotation speed direction is first direction, the center frequency of inducing transparent effect
Rate is mobile to low frequency direction, and rotation speed is bigger, and the offset of the centre frequency of inducing transparent effect is bigger；
The centre frequency of induced absorption effect changes with rotation speed, when rotation speed direction is second direction, induced absorption
The centre frequency of effect is mobile to low frequency direction, when rotation speed direction is first direction, the center frequency of induced absorption effect
Rate is mobile to high frequency direction, and rotation speed is bigger, and the offset of the centre frequency of induced absorption effect is bigger；
When rotation speed is zero, the centre frequency of inducing transparent effect is identical as the centre frequency of induced absorption effect, works as rotation
When rotary speed direction is second direction, the centre frequency of inducing transparent effect is mobile to high frequency direction, and induced absorption effect
Centre frequency is mobile to low frequency direction；When rotation speed direction is first direction, the centre frequency of inducing transparent effect is to low
Frequency direction is mobile, and the centre frequency of induced absorption effect is mobile to high frequency direction；And rotation speed is bigger, inducing transparent effect
Centre frequency and the centre frequency of induced absorption effect offset it is bigger.
9. optical fibre gyro as claimed in claim 8, which is characterized in that
First direction is counterclockwise that second direction is clockwise.
10. optical fibre gyro as described in claim 1, which is characterized in that
First fiber optic loop (8), the second fiber optic loop (9), the air core coil that third fiber optic loop (10) is optical fiber coiling, three make
With the identical optical fiber of specification, and optical fiber ring length is identical.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111510209A (en) * | 2020-04-10 | 2020-08-07 | 中国信息通信研究院 | Optical fiber vibration monitoring method and device |
| CN111578924A (en) * | 2020-04-03 | 2020-08-25 | 上海新跃联汇电子科技有限公司 | Optical gyroscope based on vernier effect of optical resonant cavity |
| CN116539198A (en) * | 2023-04-07 | 2023-08-04 | 江苏香地化学有限公司 | High-sensitivity pressure testing device based on optical fiber sensing transparent effect and applied to uridine production and control method thereof |
| CN116930831A (en) * | 2023-09-18 | 2023-10-24 | 中北大学 | Optical fiber cavity magnetic sensor based on wide-spectrum light source and measuring method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755051A (en) * | 1985-10-07 | 1988-07-05 | Mcdonnell Douglas Corporation | Vibrating optical fiber accelerometer and gyroscope |
| JP2002022461A (en) * | 2000-07-12 | 2002-01-23 | Canon Inc | Ring laser, method of driving the same, gyro apparatus, gyro apparatus driving method and signal detecting method |
| CA2687687A1 (en) * | 2007-06-15 | 2008-12-24 | The Board Of Trustees Of The Leland Stanford Junior University | System and method for using slow light in optical sensors |
| CN101629825A (en) * | 2009-08-21 | 2010-01-20 | 北京大学 | Dual-polarization interferometric fiber-optic gyro |
| CN102032905A (en) * | 2009-09-29 | 2011-04-27 | 北京大学 | Optical fiber gyroscope with enhanced slow light effect |
| CN102519447A (en) * | 2011-11-29 | 2012-06-27 | 北京航天时代光电科技有限公司 | Locking-eliminating fiber optic gyroscope of erbium doped fiber annular resonance cavity |
| CN103389084A (en) * | 2013-07-19 | 2013-11-13 | 哈尔滨工程大学 | Double-coupling optical fiber ring resonator coherent effect-based resonant fiber optic gyroscope |
| EP2698604A2 (en) * | 2012-08-14 | 2014-02-19 | Honeywell International Inc. | Low noise resonator fiber optic gyro |
| US20150369605A1 (en) * | 2014-06-23 | 2015-12-24 | Honeywell International Inc. | Symmetric three-laser resonator fiber optic gyroscope |
| CN105466410A (en) * | 2015-11-06 | 2016-04-06 | 东北林业大学 | Sensitivity-tunable interferometric fiber optic gyroscope based on fiber ring resonator |
| CN105547277A (en) * | 2016-03-07 | 2016-05-04 | 东北林业大学 | Fiber-optic gyroscope based on self-interference optical fiber ring resonator |
-
2018
- 2018-10-19 CN CN201811223617.4A patent/CN109556594B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755051A (en) * | 1985-10-07 | 1988-07-05 | Mcdonnell Douglas Corporation | Vibrating optical fiber accelerometer and gyroscope |
| JP2002022461A (en) * | 2000-07-12 | 2002-01-23 | Canon Inc | Ring laser, method of driving the same, gyro apparatus, gyro apparatus driving method and signal detecting method |
| CA2687687A1 (en) * | 2007-06-15 | 2008-12-24 | The Board Of Trustees Of The Leland Stanford Junior University | System and method for using slow light in optical sensors |
| CN101629825A (en) * | 2009-08-21 | 2010-01-20 | 北京大学 | Dual-polarization interferometric fiber-optic gyro |
| CN102032905A (en) * | 2009-09-29 | 2011-04-27 | 北京大学 | Optical fiber gyroscope with enhanced slow light effect |
| CN102519447A (en) * | 2011-11-29 | 2012-06-27 | 北京航天时代光电科技有限公司 | Locking-eliminating fiber optic gyroscope of erbium doped fiber annular resonance cavity |
| EP2698604A2 (en) * | 2012-08-14 | 2014-02-19 | Honeywell International Inc. | Low noise resonator fiber optic gyro |
| CN103389084A (en) * | 2013-07-19 | 2013-11-13 | 哈尔滨工程大学 | Double-coupling optical fiber ring resonator coherent effect-based resonant fiber optic gyroscope |
| US20150369605A1 (en) * | 2014-06-23 | 2015-12-24 | Honeywell International Inc. | Symmetric three-laser resonator fiber optic gyroscope |
| CN105466410A (en) * | 2015-11-06 | 2016-04-06 | 东北林业大学 | Sensitivity-tunable interferometric fiber optic gyroscope based on fiber ring resonator |
| CN105547277A (en) * | 2016-03-07 | 2016-05-04 | 东北林业大学 | Fiber-optic gyroscope based on self-interference optical fiber ring resonator |
Non-Patent Citations (5)
| Title |
|---|
| DIQINGYING等: "Dynamic characteristics of R-FOG based on the triangle wave phase", 《OPTICS COMMUNICATIONS》 * |
| 李冬强等: "级联谐振微环慢光效应光学陀螺仪灵敏度分析", 《电子器件》 * |
| 李如春等: "调制信号工作频率对谐振式光纤陀螺影响的研究", 《传感技术学报》 * |
| 田赫等: "单光学谐振器感应透明现象的窄带透射峰", 《光学精密工程》 * |
| 闫树斌等: "谐振式光纤陀螺闭环锁频系统", 《红外与激光工程》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578924A (en) * | 2020-04-03 | 2020-08-25 | 上海新跃联汇电子科技有限公司 | Optical gyroscope based on vernier effect of optical resonant cavity |
| CN111578924B (en) * | 2020-04-03 | 2022-08-30 | 上海新跃联汇电子科技有限公司 | Optical gyroscope based on vernier effect of optical resonant cavity |
| CN111510209A (en) * | 2020-04-10 | 2020-08-07 | 中国信息通信研究院 | Optical fiber vibration monitoring method and device |
| CN116539198A (en) * | 2023-04-07 | 2023-08-04 | 江苏香地化学有限公司 | High-sensitivity pressure testing device based on optical fiber sensing transparent effect and applied to uridine production and control method thereof |
| CN116930831A (en) * | 2023-09-18 | 2023-10-24 | 中北大学 | Optical fiber cavity magnetic sensor based on wide-spectrum light source and measuring method |
| CN116930831B (en) * | 2023-09-18 | 2023-11-17 | 中北大学 | Optical fiber cavity magnetic sensor based on wide-spectrum light source and measuring method |
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