CN116045945A - Photoelectric control method and device for optical fiber gyro rotation modulation - Google Patents
Photoelectric control method and device for optical fiber gyro rotation modulation Download PDFInfo
- Publication number
- CN116045945A CN116045945A CN202310331034.8A CN202310331034A CN116045945A CN 116045945 A CN116045945 A CN 116045945A CN 202310331034 A CN202310331034 A CN 202310331034A CN 116045945 A CN116045945 A CN 116045945A
- Authority
- CN
- China
- Prior art keywords
- light beam
- fiber
- photoelectric switch
- photoelectric
- waveguide
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000013307 optical fiber Substances 0.000 title claims description 73
- 230000010287 polarization Effects 0.000 claims abstract description 62
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims description 34
- 239000000835 fiber Substances 0.000 claims description 25
- 230000005693 optoelectronics Effects 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000011664 signaling Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000004927 fusion Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
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
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 relates to the technical field of fiber-optic gyroscopes, and discloses a photoelectric control method and device for rotation modulation of a fiber-optic gyroscope, which are used for improving the testing efficiency and accuracy of the fiber-optic gyroscope. The method comprises the following steps: responding to the first photoelectric control signal through a photoelectric switch combination; controlling the first photoelectric switch and the second photoelectric switch to be communicated, acquiring a first light beam and acquiring a second light beam; waveguide modulation is carried out on the first light beam and the second light beam, first negative feedback information is generated, and first rotation modulation is carried out on the fiber-optic gyroscope through the first negative feedback information; receiving and responding to the second photoelectric control signal, and controlling the photoelectric switch combination to communicate according to a second preset optical path to generate a third light beam with the opposite polarization direction to the first light beam and a fourth light beam with the opposite polarization direction to the second light beam; and carrying out waveguide modulation on the third light beam and the fourth light beam, generating second negative feedback information and carrying out second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
Description
Technical Field
The invention relates to the technical field of fiber-optic gyroscopes, in particular to a photoelectric control method and device for rotation modulation of a fiber-optic gyroscope.
Background
In the engineering application process, in order to fully embody the performance of the gyroscope and reduce the gyroscope drift caused by environmental interference, the optical fiber gyroscope generally adopts a mechanical rotation modulation technology on a system, and the main purpose of the technology is to drive the optical fiber gyroscope through the rolling motion of a platform body, especially the forward and reverse rotation motion can realize the uniform effect of a space field, so as to offset the gyroscope drift caused by uneven space temperature gradient, magnetic field and the like.
The modulation technique has the defects that the table body adopts a mechanical coupler and a motor, and has large volume, slow response, mechanical error and poor reliability. In addition, the cost of the platform body is high in the production and test process of the fiber-optic gyroscope element, and the batch test of gyroscopes is not facilitated. Based on the above considerations, it is necessary to achieve the above-described rotational modulation effect in an efficient non-mechanical manner of rotation.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a photoelectric control method and a device for rotation modulation of an optical fiber gyroscope, which solve the technical problem of lower accuracy when testing the optical fiber gyroscope.
The invention provides a photoelectric control method for optical fiber gyro rotation modulation, which comprises the following steps: receiving a first photoelectric control signal based on a preset optical fiber gyroscope, and responding to the first photoelectric control signal through a photoelectric switch combination in the optical fiber gyroscope, wherein the optical fiber gyroscope comprises: fiber optic loop, Y waveguide, and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch; the first photoelectric switch and the second photoelectric switch are respectively controlled to be communicated according to a first preset light path, and the communication state of the first preset light path is obtained, wherein the communication state comprises: communication and non-communication; when the first preset light path is communicated, a target light beam is emitted based on a light source in the fiber-optic gyroscope, and the target light beam is split through the Y waveguide, so that a first split beam and a second split beam are generated; acquiring a first light beam generated by the optical fiber ring after the first beam passes through the first photoelectric switch; acquiring a second light beam generated by the optical fiber ring after the second beam passes through the second photoelectric switch; waveguide modulation is carried out on the first light beam and the second light beam, first negative feedback information is generated, and first rotation modulation is carried out on the fiber-optic gyroscope through the first negative feedback information; receiving a second photoelectric control signal through the fiber optic gyroscope, and responding to the second photoelectric control signal through the photoelectric switch combination; controlling the photoelectric switch combination to communicate according to a second preset optical path, and acquiring the communication state of the second preset optical path; when the second preset optical path is communicated, a third light beam corresponding to the first photoelectric switch is obtained, wherein the polarization direction of the third light beam is opposite to that of the first light beam; acquiring a fourth light beam corresponding to the second photoelectric switch, wherein the polarization directions of the fourth light beam and the second light beam are opposite; and carrying out waveguide modulation on the third light beam and the fourth light beam to generate second negative feedback information, and carrying out second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
In the invention, the preset-based fiber-optic gyroscope receives a first photoelectric control signal and responds to the first photoelectric control signal through a photoelectric switch combination in the fiber-optic gyroscope, and the fiber-optic gyroscope comprises: fiber optic loop, Y waveguide, and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first optoelectronic switch and a second optoelectronic switch, comprising: receiving a first photoelectric control signal based on a preset optical fiber gyroscope, wherein the optical fiber gyroscope comprises: photoelectric switch combination, optical fiber ring and Y waveguide; transmitting the first photoelectric control signal to the photoelectric switch combination, wherein the photoelectric switch combination comprises: a first photoelectric switch and a second photoelectric switch; the first photoelectric control signal is received and responded by the first photoelectric switch and the second photoelectric switch.
In the present invention, the waveguide modulating the first light beam and the second light beam to generate first negative feedback information includes: combining and interfering the first light beam and the second light beam through the Y waveguide to generate a first interference light beam; generating a first interference signal corresponding to the first interference beam by a detector in the fiber optic gyroscope; and transmitting the first interference signal to the Y waveguide for signal processing, generating first negative feedback information, and carrying out first rotation modulation on the fiber-optic gyroscope through the first negative feedback information.
In the present invention, the waveguide modulating the third light beam and the fourth light beam to generate second negative feedback information includes: combining and interfering the third light beam and the fourth light beam through the Y waveguide to generate a second interference light beam; generating a second interference signal corresponding to the second interference beam by a detector in the fiber optic gyroscope; and transmitting the second interference signal to the Y waveguide for signal processing, generating second negative feedback information, and carrying out second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
The invention also provides a photoelectric control device for optical fiber gyro rotation modulation, which comprises:
the control signal receiving module is used for receiving a first photoelectric control signal based on a preset optical fiber gyroscope and responding to the first photoelectric control signal through a photoelectric switch combination in the optical fiber gyroscope, and the optical fiber gyroscope comprises: fiber optic loop and Y waveguide and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch;
the first beam splitting module is used for respectively controlling the first photoelectric switch and the second photoelectric switch to communicate according to a first preset light path and obtaining a communication state of the first preset light path, wherein the communication state comprises: when the first preset light paths are communicated, a target light beam is emitted based on a light source in the fiber-optic gyroscope, the target light beam is split through the Y waveguide, a first split beam and a second split beam are generated, a first light beam generated by the fiber-optic ring after the first split beam passes through the first photoelectric switch is obtained, and a second light beam generated by the fiber-optic ring after the second split beam passes through the second photoelectric switch is obtained;
the first waveguide modulation module is used for carrying out waveguide modulation on the first light beam and the second light beam, generating first negative feedback information and carrying out first rotation modulation on the fiber-optic gyroscope through the first negative feedback information;
the second beam splitting module is used for receiving a second photoelectric control signal through the fiber optic gyroscope, responding to the second photoelectric control signal through the photoelectric switch combination, controlling the photoelectric switch combination to communicate according to a second preset optical path, acquiring a communication state of the second preset optical path, and acquiring a third beam corresponding to the first photoelectric switch when the second preset optical path is communicated, wherein the third beam is opposite to the first beam in polarization direction, and acquiring a fourth beam corresponding to the second photoelectric switch, and the fourth beam is opposite to the second beam in polarization direction;
and the second waveguide modulation module is used for carrying out waveguide modulation on the third light beam and the fourth light beam, generating second negative feedback information and carrying out second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
In the technical scheme provided by the invention, a first photoelectric control signal is received based on a preset optical fiber gyroscope, and is responded to by a photoelectric switch combination in the optical fiber gyroscope, wherein the optical fiber gyroscope comprises: fiber optic loop, Y waveguide, and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch; the first photoelectric switch and the second photoelectric switch are respectively controlled to be communicated according to a first preset light path, and the communication state of the first preset light path is obtained, wherein the communication state comprises: communication and non-communication; when the first preset light path is communicated, a target light beam is emitted based on a light source in the fiber-optic gyroscope, and the target light beam is split through the Y waveguide, so that a first split beam and a second split beam are generated; acquiring a first light beam generated by the optical fiber ring after the first beam passes through the first photoelectric switch; acquiring a second light beam generated by the optical fiber ring after the second beam passes through the second photoelectric switch; waveguide modulation is carried out on the first light beam and the second light beam, first negative feedback information is generated, and first rotation modulation is carried out on the fiber-optic gyroscope through the first negative feedback information; receiving a second photoelectric control signal through the fiber optic gyroscope, and responding to the second photoelectric control signal through the photoelectric switch combination; controlling the photoelectric switch combination to communicate according to a second preset optical path, and acquiring the communication state of the second preset optical path; when the second preset optical path is communicated, a third light beam corresponding to the first photoelectric switch is obtained, wherein the polarization direction of the third light beam is opposite to that of the first light beam; acquiring a fourth light beam corresponding to the second photoelectric switch, wherein the polarization directions of the fourth light beam and the second light beam are opposite; the third light beam and the fourth light beam are subjected to waveguide modulation to generate second negative feedback information, and the fiber-optic gyroscope is subjected to second rotation modulation through the second negative feedback information.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a photoelectric control method for optical fiber gyro rotation modulation in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a superimposed rotational speed step waveform applied by a Y waveguide in an embodiment of the present invention.
Fig. 3 is a schematic diagram of beam reversing and rotation speed modulation implemented by photoelectric switching in an embodiment of the invention.
FIG. 4 is a flow chart of waveguide modulation of a first beam and a second beam in an embodiment of the invention.
Fig. 5 is a schematic diagram of a polarization-controlled photovoltaic switch commutator in an embodiment of the present invention.
Fig. 6 is a schematic diagram of an intensity-controlled photovoltaic switch commutator in an embodiment of the invention.
Fig. 7 is a schematic diagram of an optical-electrical control device for optical fiber gyro rotation modulation in an embodiment of the present invention.
Reference numerals:
201. a first light source; 202. a first coupler; 203. a first Y waveguide; 2041. a first photoelectric switch; 2042. a second photoelectric switch; 2051. a second coupler; 2052. a third coupler; 206. a first fiber optic loop; 207. a detector; 400. a second Y waveguide; 401. a first voltage driving signal; 4021. a first polarization controller switch; 4022. a second polarization controller switch; 4031. a first polarization coupler; 4032. a second polarization coupler; 4033. a third polarization coupler; 4034. a fourth polarization coupler; 500. a third Y-waveguide; 501. a second voltage driving signal; 5021. a third photoelectric switch; 5022. a fourth photoelectric switch; 5023. a fifth photoelectric switch; 5024. a sixth photoelectric switch; 5031. a fourth coupler; 5032. a fifth coupler; 5033. a sixth coupler; 5034. a seventh coupler; 504. a second fiber optic loop; 601. a control signal receiving module; 602. a first beam splitting module; 603. a first waveguide modulation module; 604. a second beam splitting module; 605. a second waveguide modulation module.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
For easy understanding, the following describes a specific flow of an embodiment of the present invention, referring to fig. 1, fig. 1 is a flowchart of a method for controlling optical-electrical rotation modulation of an optical fiber gyro according to an embodiment of the present invention, as shown in fig. 1, where the flowchart includes the following steps:
s1001, receiving a first photoelectric control signal based on a preset optical fiber gyroscope, and responding to the first photoelectric control signal through a photoelectric switch combination in the optical fiber gyroscope, wherein the optical fiber gyroscope comprises: fiber optic ring, Y waveguide, and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch;
s1002, respectively controlling the first photoelectric switch and the second photoelectric switch to communicate according to a first preset light path, and obtaining a communication state of the first preset light path, wherein the communication state comprises: communication and non-communication;
s1003, when a first preset light path is communicated, emitting a target light beam based on a light source in the fiber-optic gyroscope, and splitting the target light beam through a Y waveguide to generate a first beam splitting and a second beam splitting;
s1004, obtaining a first light beam generated by an optical fiber ring after the first beam passes through a first photoelectric switch;
s1005, acquiring a second beam generated by the optical fiber ring of the second split beam after passing through the second photoelectric switch;
specifically, the rotation speed is modulated
Is of the size ofConstant (e.g. 10 degrees/s), as shown in FIG. 2, the gyroscope should complete two parts of rotation speed simultaneously, one is the rotation speed to be measured +.>
The second is the additional modulation speed +.>
Is applied to the substrate. In order to realize the detection of the rotation speed to be detected and simultaneously add additional constant modulation rotation speed, the step wave of the Y waveguide modulation end is added with +.>
Step voltage corresponding to the magnitude +.>
The waveform is shown in FIG. 2, in which the dotted line step height represents +.>
The solid line step height represents the rotational speed of the gyro to be sensitive +.>
。
S1006, waveguide modulation is carried out on the first light beam and the second light beam, first negative feedback information is generated, and first rotation modulation is carried out on the fiber-optic gyroscope through the first negative feedback information;
s1007, receiving a second photoelectric control signal through the fiber optic gyroscope, and responding to the second photoelectric control signal through a photoelectric switch combination;
s1008, controlling the photoelectric switch combination to communicate according to a second preset light path, and acquiring a communication state of the second preset light path;
s1009, when the second preset optical path is communicated, obtaining a third light beam corresponding to the first photoelectric switch, wherein the polarization directions of the third light beam and the first light beam are opposite;
s1010, acquiring a fourth light beam corresponding to the second photoelectric switch, wherein the polarization directions of the fourth light beam and the second light beam are opposite;
s1011, performing waveguide modulation on the third light beam and the fourth light beam to generate second negative feedback information, and performing second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
In a specific embodiment, as shown in fig. 3, when the fiber-optic gyroscope receives the first photoelectric control signal, the first photoelectric switch 2041 and the second photoelectric switch 2042 default to be straight-through (solid line in the figure), and the two switches are switched to the virtual line end in the state of having the external photoelectric control signal, so that the light beam is commutated by the control of the photoelectric switches. The first light source 201 passes through the first coupler 202 and then passes through the first Y waveguide 203 to split beams, one beam of light is directly incident on the second coupler 2051 through the first photoelectric switch 2041, the other beam of light is directly incident on the third coupler 2052 through the second photoelectric switch 2042, the two beams of light respectively pass through the first optical fiber ring 206 along opposite directions, then sequentially pass through the corresponding coupler and the photoelectric switch to return to the Y waveguide for beam combination interference, the interference light passes through the first coupler 202, and then an interference intensity signal is formed on the detector 207 for negative feedback of a modulation and demodulation signal to the Y waveguide. In order to achieve the effect of rotating the optical fiber gyroscope, a larger speed V is usually added on the waveguide, so that the optical path can realize a novel constant rotating speed V of the gyroscope and rotate along one direction for rotation modulation. Meanwhile, in order to realize the rapid reverse of the light path, a first photoelectric switch 2041 and a second photoelectric switch 2042 are introduced into the original gyro structure, and it is to be noted that the photoelectric switch has the function of completing the light path light-on switching when a photoelectric switching signal exists, that is, cutting off the original default light path and connecting the light path of which the other end is disconnected. Taking the first photoelectric switch 2041 as an example, when the switching signal is 1, the connection with the second coupler 2051 is cut off, and the connection with the third coupler 2052 is communicated, wherein the second photoelectric switch 2042 is similar to the connection with the second coupler 2051 on the optical path, and the third coupler 2052 is cut off, and the two photoelectric switches are used for turning the light beam passing through the ring clockwise and anticlockwise respectively by 180 degrees as if the rotation axis of the optical fiber ring is turned 180 degrees, so that the polarity of the sensitive axis of the ring is changed. The corresponding voltage is set through the waveguide, so that the setting of the rotating speed in any direction and in any magnitude can be realized. And then the rotation modulation of any rotating speed is equivalently realized through the modulation control of the photoelectric switch and the Y waveguide.
In the embodiment of the invention, a first photoelectric control signal is responded through a photoelectric switch combination in the fiber-optic gyroscope; controlling the first photoelectric switch and the second photoelectric switch to be communicated according to a first preset light path, and acquiring a first light beam generated by the optical fiber ring when the first photoelectric switch is communicated and acquiring a second light beam generated by the optical fiber ring when the second photoelectric switch is communicated; waveguide modulation is carried out on the first light beam and the second light beam, and first negative feedback information is generated; receiving and responding to the second photoelectric control signal, and controlling the photoelectric switch combination to communicate according to a second preset optical path to generate a third light beam with the opposite polarization direction to the first light beam and a fourth light beam with the opposite polarization direction to the second light beam; the third light beam and the fourth light beam are subjected to waveguide modulation to generate second negative feedback information, and the rotation speed is controlled by controlling the light beam direction and the Y waveguide modulation voltage waveform through the photoelectric switch, so that the rotation control of the positive direction and the negative direction and any rotation speed is realized, and the testing efficiency and the accuracy of the fiber-optic gyroscope are further improved.
In a specific embodiment, the process of executing step S101 may specifically include the following steps:
(1) Receiving a first photoelectric control signal based on a preset optical fiber gyroscope, wherein the optical fiber gyroscope comprises: photoelectric switch combination, optical fiber ring and Y waveguide;
(2) Transmitting a first photoelectric control signal to a photoelectric switch combination, wherein the photoelectric switch combination comprises: a first photoelectric switch and a second photoelectric switch;
(3) The first photoelectric control signal is received and responded by the first photoelectric switch and the second photoelectric switch.
In a specific embodiment, as shown in fig. 4, the process of performing step S103 may specifically include the following steps:
s301, carrying out beam combination interference on the first light beam and the second light beam through a Y waveguide to generate a first interference light beam;
s302, generating a first interference signal corresponding to the first interference light beam through a detector in the fiber-optic gyroscope;
s303, transmitting the first interference signal to the Y waveguide for signal processing, generating first negative feedback information, and carrying out first rotation modulation on the fiber-optic gyroscope through the first negative feedback information.
In a specific embodiment, the process of executing step S105 may specifically include the following steps:
(1) Combining and interfering the third light beam and the fourth light beam through the Y waveguide to generate a second interference light beam;
(2) Generating a second interference signal corresponding to the second interference beam by a detector in the fiber optic gyroscope;
(3) And transmitting the second interference signal to the Y waveguide for signal processing to generate second negative feedback information, and performing second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
In a specific embodiment, when the above-mentioned photoelectric switch combination adopts a polarization control type lithium niobate modulator, as shown in fig. 5, the first voltage driving signal 401 is a digital square wave signal of 0 and 1 type, and the duty ratio is 50:50, where the signal period is the holding time of the positive and negative rotation speeds, and assuming that 1 represents a counterclockwise rotation, 0 represents a counterclockwise rotation. The first polarization controller switch 4021 and the second polarization controller switch 4022 control polarization of the optical fiber beam passing through the polarization controller switch after receiving the first voltage driving signal 401 by rotating the polarization direction by 90 °, i.e., rotating the polarization direction by 90 ° after the direction of the control signal, and for the polarization maintaining optical fiber, the polarization controller can twist the polarized light in the X-axis (parallel) direction of the optical fiber into the polarized light in the Y-axis (perpendicular) direction. For convenience of description, it is assumed that the low level is parallel polarized light and the high level is adjusted to perpendicular polarized light. Assuming a low level voltage drive signal at first, the light beam entering the first polarization controller switch 4021 and the second polarization controller switch 4022 from the second Y waveguide 400 is split, and the parallel polarization direction is maintained, and the light beam passes through the first polarization coupler 4031 and the second polarization coupler 4032, which are polarization type couplers, wherein the straight-through end has a parallel direction polarizer, and the vertically polarized light is completely filtered. Similarly, the coupling end is provided with a polarizer in the vertical direction, and the parallel polarized light is completely filtered out. Such two parallel polarized light beams reach the third polarization coupler 4033 and the fourth polarization coupler 4034, and the two polarizers are common polarizer couplers (parallel polarized light may pass through and perpendicular polarized light may also pass through). The two light beams after passing through the loop reversely pass through the coupler fourth polarization coupler 4034, the third polarization coupler 4033 passes through the coupler second polarization coupler 4032 and the first polarization coupler 4031 from the through end, then passes through the polarization controller second polarization controller switch 4022 and the first polarization controller switch 4021, and then merges and interferes at the waveguide, when the first voltage driving signal 401 is at a high level, unlike the transmission path, the two light beams after waveguide splitting pass through the first polarization controller switch 4021 and the second polarization controller switch 4022, and generate vertical polarized light perpendicular to the paper surface, when the vertical polarized light passes through the first polarization coupler 4031 and the second polarization coupler 4032, the through end is blocked, and the two light beams pass through the coupling end, and are exchanged in a cross direction to be emitted to the third polarization coupler 4033 and the fourth polarization coupler 4034. Considering that the optical fiber loop is formed longer and the optical path difference of the polarized light of the fast and slow axes is greatly different, it is necessary to realize the fast and slow axis switching of the vertical polarized light by 90 DEG fusion, so that the vertical polarized light is adjusted to the parallel polarized light again (the low-loss fusion is required, for example, the loss is less than 0.1 dB). The two parallel polarized light beams transmitted in the intersecting direction respectively pass through the optical fiber loops from opposite directions, then exit from the corresponding third and fourth polarization couplers 4033 and 4034 again, enter the first and second polarization couplers 4031 and 4032 after passing through the 90 ° fusion point, and reach the Y waveguide to interfere after passing through the first and second polarization controller switches 4021 and 4022. With reference to fig. 5, the high and low level control light beams of the voltage signals respectively enter/exit the optical fiber loop from the parallel direction and enter/exit the optical fiber loop from the cross direction, so that the direction of testing the angular velocity direction of the optical fiber loop is achieved, and the equivalent effect of sensitive axis reversing of the sensitive loop is realized.
In a specific embodiment, when the combination of the above-mentioned photoelectric switches adopts the intensity control type photoelectric switch commutator, as shown in fig. 6, two light beams input by the Y waveguide reach the third photoelectric switch 5021, the fourth photoelectric switch 5022, the fifth photoelectric switch 5023 and the sixth photoelectric switch 5024 through the fourth coupler 5031 and the fifth coupler 5032 respectively, and the on-off of the light path is determined under the driving of the second voltage driving signal 501, in this embodiment of the present invention, it is assumed that the low-level voltage signal gates the above-mentioned photoelectric switch, and the high level signal blocks the above-mentioned photoelectric switch. Then, if a low level signal is started, two beams of light pass through parallel straight ends of the coupler respectively, and the cross-coupled end voltage control signal is not gate (high level) blocked. The two light beams pass through the third photoelectric switch 5021 and the fourth photoelectric switch 5022, then pass through the sixth coupler 5033 and the seventh coupler 5034 of the couplers, pass through the second optical fiber ring 504, pass through the seventh coupler 5034 and the sixth coupler 5033, and reach the third Y waveguide 500 through the fifth coupler 5032 and the fourth coupler 5031 at corresponding straight ends to interfere. Similarly, when the second voltage drive signal 501 is high, the corresponding coupler is cross-ended, and the pass-through is blocked. Two light beams input from the waveguides respectively pass through the fourth coupler 5031, the fifth coupler 5032, the fifth photoelectric switch 5023 and the sixth photoelectric switch 5024, the sixth coupler 5033 and the seventh coupler 5034, the fifth photoelectric switch 5023 and the sixth photoelectric switch 5024, the fifth coupler 5032 and the fourth coupler 5031, the third Y waveguide 500, and the two light beams pass through the optical fiber loops from opposite directions under the high and low levels of the second voltage driving signal 501, so that the rotation speed detection commutation is realized, which is equivalent to the inversion of the gyro symmetry axis.
The embodiment of the invention also provides a photoelectric control device for optical fiber gyro rotation modulation, as shown in fig. 7, the photoelectric control device for optical fiber gyro rotation modulation specifically comprises:
the control signal receiving module 601 is configured to receive a first photoelectric control signal based on a preset optical fiber gyro, and respond to the first photoelectric control signal through a photoelectric switch combination in the optical fiber gyro, where the optical fiber gyro includes: fiber optic loop and Y waveguide and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch;
the first beam splitting module 602 is configured to control the first photoelectric switch and the second photoelectric switch to communicate according to a first preset optical path, and obtain a communication state of the first preset optical path, where the communication state includes: when the first preset light paths are communicated, a target light beam is emitted based on a light source in the fiber-optic gyroscope, the target light beam is split through the Y waveguide, a first split beam and a second split beam are generated, a first light beam generated by the fiber-optic ring after the first split beam passes through the first photoelectric switch is obtained, and a second light beam generated by the fiber-optic ring after the second split beam passes through the second photoelectric switch is obtained;
the first waveguide modulation module 603 is configured to perform waveguide modulation on the first light beam and the second light beam, generate first negative feedback information, and perform first rotation modulation on the fiber-optic gyroscope through the first negative feedback information;
the second beam splitting module 604 is configured to receive a second photoelectric control signal through the fiber optic gyroscope, and respond to the second photoelectric control signal through the photoelectric switch combination, control the photoelectric switch combination to communicate according to a second preset optical path, and obtain a communication state of the second preset optical path, and when the second preset optical path is communicated, obtain a third beam corresponding to the first photoelectric switch, where a polarization direction of the third beam is opposite to a polarization direction of the first beam, obtain a fourth beam corresponding to the second photoelectric switch, where a polarization direction of the fourth beam is opposite to a polarization direction of the second beam;
and the second waveguide modulation module 605 is configured to perform waveguide modulation on the third light beam and the fourth light beam, generate second negative feedback information, and perform second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
Through the cooperation of the modules, a first photoelectric control signal is received based on a preset optical fiber gyro, and the first photoelectric control signal is responded through a photoelectric switch combination in the optical fiber gyro, wherein the optical fiber gyro comprises: fiber optic loop and Y waveguide and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch; the first photoelectric switch and the second photoelectric switch are respectively controlled to be communicated according to a first preset light path, and the communication state of the first preset light path is obtained, wherein the communication state comprises: communication and non-communication; when the first preset light path is communicated, a target light beam is emitted based on a light source in the fiber-optic gyroscope, and the target light beam is split through the Y waveguide, so that a first split beam and a second split beam are generated; acquiring a first light beam generated by the optical fiber ring after the first beam passes through the first photoelectric switch; acquiring a second light beam generated by the optical fiber ring after the second beam passes through the second photoelectric switch; waveguide modulation is carried out on the first light beam and the second light beam, first negative feedback information is generated, and first rotation modulation is carried out on the fiber-optic gyroscope through the first negative feedback information; receiving a second photoelectric control signal through the fiber optic gyroscope, and responding to the second photoelectric control signal through the photoelectric switch combination; controlling the photoelectric switch combination to communicate according to a second preset optical path, and acquiring the communication state of the second preset optical path; when the second preset optical path is communicated, a third light beam corresponding to the first photoelectric switch is obtained, wherein the polarization direction of the third light beam is opposite to that of the first light beam; acquiring a fourth light beam corresponding to the second photoelectric switch, wherein the polarization directions of the fourth light beam and the second light beam are opposite; the third light beam and the fourth light beam are subjected to waveguide modulation to generate second negative feedback information, and the fiber-optic gyroscope is subjected to second rotation modulation through the second negative feedback information.
The above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the scope of the claims.
Claims (5)
1. The photoelectric control method for the rotation modulation of the fiber-optic gyroscope is characterized by comprising the following steps of:
receiving a first photoelectric control signal based on a preset optical fiber gyroscope, and responding to the first photoelectric control signal through a photoelectric switch combination in the optical fiber gyroscope, wherein the optical fiber gyroscope comprises: fiber optic loop, Y waveguide, and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch;
the first photoelectric switch and the second photoelectric switch are respectively controlled to be communicated according to a first preset light path, and the communication state of the first preset light path is obtained, wherein the communication state comprises: communication and non-communication;
when the first preset light path is communicated, a target light beam is emitted based on a light source in the fiber-optic gyroscope, and the target light beam is split through the Y waveguide, so that a first split beam and a second split beam are generated;
acquiring a first light beam generated by the optical fiber ring after the first beam passes through the first photoelectric switch;
acquiring a second light beam generated by the optical fiber ring after the second beam passes through the second photoelectric switch;
waveguide modulation is carried out on the first light beam and the second light beam, first negative feedback information is generated, and first rotation modulation is carried out on the fiber-optic gyroscope through the first negative feedback information;
receiving a second photoelectric control signal through the fiber optic gyroscope, and responding to the second photoelectric control signal through the photoelectric switch combination;
controlling the photoelectric switch combination to communicate according to a second preset optical path, and acquiring the communication state of the second preset optical path;
when the second preset optical path is communicated, a third light beam corresponding to the first photoelectric switch is obtained, wherein the polarization direction of the third light beam is opposite to that of the first light beam;
acquiring a fourth light beam corresponding to the second photoelectric switch, wherein the polarization directions of the fourth light beam and the second light beam are opposite;
and carrying out waveguide modulation on the third light beam and the fourth light beam to generate second negative feedback information, and carrying out second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
2. The method of claim 1, wherein the pre-set-based fiber-optic gyroscope receives a first photoelectric control signal and responds to the first photoelectric control signal through a combination of photoelectric switches in the fiber-optic gyroscope, the fiber-optic gyroscope comprising: fiber optic loop, Y waveguide, and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first optoelectronic switch and a second optoelectronic switch, comprising:
receiving a first photoelectric control signal based on a preset optical fiber gyroscope, wherein the optical fiber gyroscope comprises: photoelectric switch combination, optical fiber ring and Y waveguide;
transmitting the first photoelectric control signal to the photoelectric switch combination, wherein the photoelectric switch combination comprises: a first photoelectric switch and a second photoelectric switch;
the first photoelectric control signal is received and responded by the first photoelectric switch and the second photoelectric switch.
3. The method of claim 1, wherein the performing waveguide modulation on the first light beam and the second light beam to generate first negative feedback information includes:
combining and interfering the first light beam and the second light beam through the Y waveguide to generate a first interference light beam;
generating a first interference signal corresponding to the first interference beam by a detector in the fiber optic gyroscope;
and transmitting the first interference signal to the Y waveguide for signal processing, generating first negative feedback information, and carrying out first rotation modulation on the fiber-optic gyroscope through the first negative feedback information.
4. The method for controlling rotation modulation of a fiber-optic gyroscope according to claim 1, wherein the waveguide modulating the third light beam and the fourth light beam to generate second negative feedback information comprises:
combining and interfering the third light beam and the fourth light beam through the Y waveguide to generate a second interference light beam;
generating a second interference signal corresponding to the second interference beam by a detector in the fiber optic gyroscope;
and transmitting the second interference signal to the Y waveguide for signal processing, generating second negative feedback information, and carrying out second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
5. An optical-electrical control device for optical-fiber gyro rotation modulation, characterized by performing the optical-electrical control method for optical-fiber gyro rotation modulation according to any one of claims 1 to 4, comprising:
the control signal receiving module is used for receiving a first photoelectric control signal based on a preset optical fiber gyroscope and responding to the first photoelectric control signal through a photoelectric switch combination in the optical fiber gyroscope, and the optical fiber gyroscope comprises: fiber optic loop and Y waveguide and opto-electronic switch combination, wherein the opto-electronic switch combination comprises: a first photoelectric switch and a second photoelectric switch;
the first beam splitting module is used for respectively controlling the first photoelectric switch and the second photoelectric switch to communicate according to a first preset light path and obtaining a communication state of the first preset light path, wherein the communication state comprises: when the first preset light paths are communicated, a target light beam is emitted based on a light source in the fiber-optic gyroscope, the target light beam is split through the Y waveguide, a first split beam and a second split beam are generated, a first light beam generated by the fiber-optic ring after the first split beam passes through the first photoelectric switch is obtained, and a second light beam generated by the fiber-optic ring after the second split beam passes through the second photoelectric switch is obtained;
the first waveguide modulation module is used for carrying out waveguide modulation on the first light beam and the second light beam, generating first negative feedback information and carrying out first rotation modulation on the fiber-optic gyroscope through the first negative feedback information;
the second beam splitting module is used for receiving a second photoelectric control signal through the fiber optic gyroscope, responding to the second photoelectric control signal through the photoelectric switch combination, controlling the photoelectric switch combination to communicate according to a second preset optical path, acquiring a communication state of the second preset optical path, and acquiring a third beam corresponding to the first photoelectric switch when the second preset optical path is communicated, wherein the third beam is opposite to the first beam in polarization direction, and acquiring a fourth beam corresponding to the second photoelectric switch, and the fourth beam is opposite to the second beam in polarization direction;
and the second waveguide modulation module is used for carrying out waveguide modulation on the third light beam and the fourth light beam, generating second negative feedback information and carrying out second rotation modulation on the fiber-optic gyroscope through the second negative feedback information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310331034.8A CN116045945A (en) | 2023-03-31 | 2023-03-31 | Photoelectric control method and device for optical fiber gyro rotation modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310331034.8A CN116045945A (en) | 2023-03-31 | 2023-03-31 | Photoelectric control method and device for optical fiber gyro rotation modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116045945A true CN116045945A (en) | 2023-05-02 |
Family
ID=86118516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310331034.8A Pending CN116045945A (en) | 2023-03-31 | 2023-03-31 | Photoelectric control method and device for optical fiber gyro rotation modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116045945A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4382681A (en) * | 1980-01-17 | 1983-05-10 | International Standard Electric Corporation | Measurement of rotation rate using Sagnac effect |
| CA2016302A1 (en) * | 1989-05-15 | 1990-11-15 | Kenichi Okada | Fiber optic gyro |
| CN101694386A (en) * | 2009-10-22 | 2010-04-14 | 浙江大学 | High-sensitivity optical fiber gyroscope |
| US20160146607A1 (en) * | 2013-06-20 | 2016-05-26 | Tubitak (Turkiye Bilimsel Ve Teknolojik Arastirma Kurumu) | Dynamically monitoring the instantaneous zero rotation rate voltage of interferometric fiber optic gyroscope (ifog) |
| CN110440784A (en) * | 2018-05-04 | 2019-11-12 | 武汉长盈通光电技术有限公司 | A kind of multiaxis closed-loop fiber optic gyroscope of path multiplexing |
| CN113532412A (en) * | 2021-07-05 | 2021-10-22 | 浙江大学 | Device for improving reciprocity of interference type optical fiber gyroscope |
| CN114935348A (en) * | 2022-07-27 | 2022-08-23 | 中国船舶重工集团公司第七0七研究所 | Optical switch array-based optical fiber loop performance test method and system |
-
2023
- 2023-03-31 CN CN202310331034.8A patent/CN116045945A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4382681A (en) * | 1980-01-17 | 1983-05-10 | International Standard Electric Corporation | Measurement of rotation rate using Sagnac effect |
| CA2016302A1 (en) * | 1989-05-15 | 1990-11-15 | Kenichi Okada | Fiber optic gyro |
| CN101694386A (en) * | 2009-10-22 | 2010-04-14 | 浙江大学 | High-sensitivity optical fiber gyroscope |
| US20160146607A1 (en) * | 2013-06-20 | 2016-05-26 | Tubitak (Turkiye Bilimsel Ve Teknolojik Arastirma Kurumu) | Dynamically monitoring the instantaneous zero rotation rate voltage of interferometric fiber optic gyroscope (ifog) |
| CN110440784A (en) * | 2018-05-04 | 2019-11-12 | 武汉长盈通光电技术有限公司 | A kind of multiaxis closed-loop fiber optic gyroscope of path multiplexing |
| CN113532412A (en) * | 2021-07-05 | 2021-10-22 | 浙江大学 | Device for improving reciprocity of interference type optical fiber gyroscope |
| CN114935348A (en) * | 2022-07-27 | 2022-08-23 | 中国船舶重工集团公司第七0七研究所 | Optical switch array-based optical fiber loop performance test method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112710294B (en) | Low-optical-noise double-ring parallel resonant gyro system and method | |
| CN101694386B (en) | High-sensitivity optical fiber gyroscope | |
| CN113280802B (en) | Multifunctional lithium niobate chip for resonant integrated optical gyroscope | |
| CN105705907A (en) | Energy-efficient optic gyroscope devices | |
| CN110849345B (en) | Miniature resonant optical gyroscope based on multi-turn micro-nano optical fiber three-dimensional resonant cavity | |
| CN108645405B (en) | Inertial sensing unit with height integration of optical gyroscope and accelerometer | |
| CN115014318B (en) | Hollow microstructure optical fiber gyroscope | |
| CN109738988B (en) | All-solid-state horizontal two-dimensional light beam steering device based on lens | |
| CN116045956B (en) | Optical fiber gyroscope and optical polarization state sensing rotation-based method thereof | |
| CN117433500B (en) | Polarization mode multiplexing double-optical-path fiber gyroscope based on photon chip | |
| CN117490676B (en) | Monolithic integrated film lithium niobate photon driving chip and optical fiber gyro | |
| CN116045945A (en) | Photoelectric control method and device for optical fiber gyro rotation modulation | |
| CN118089691A (en) | Chip for composite material integrated optical gyroscope, preparation method and working method | |
| CN214375657U (en) | Hybrid integrated photoelectric chip, optical modulator and fiber-optic gyroscope | |
| US20220121081A1 (en) | Micro Magneto-optical Fiber Switch | |
| CN102305629B (en) | Inertial measurement system based on high-integration-level accelerometer | |
| CN213957807U (en) | Double-entanglement photon pair generation device based on collinear BBO crystal | |
| CN113566806A (en) | Single-polarization low-optical-noise spatial micromirror coupling system and digital signal processing system | |
| Ruff et al. | Self-healing free space optical link | |
| CN110601756B (en) | Electro-optical nutation coupling system and method for space laser communication | |
| CN113532412A (en) | Device for improving reciprocity of interference type optical fiber gyroscope | |
| CN113690727A (en) | Single-mode fiber laser single-polarized light output method and device | |
| CN106931958B (en) | Demodulation method of three-axis integrated fiber-optic gyroscope | |
| RU2107318C1 (en) | Multichannel fibre-optical commutator | |
| CN220933304U (en) | Polarization-maintaining 1x4 two-way magneto-optical switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20230502 |
|
| RJ01 | Rejection of invention patent application after publication |