CN115326110A - Device and method for detecting resonant light path of cavity of laser gyroscope - Google Patents

Device and method for detecting resonant light path of cavity of laser gyroscope Download PDF

Info

Publication number
CN115326110A
CN115326110A CN202211255217.8A CN202211255217A CN115326110A CN 115326110 A CN115326110 A CN 115326110A CN 202211255217 A CN202211255217 A CN 202211255217A CN 115326110 A CN115326110 A CN 115326110A
Authority
CN
China
Prior art keywords
laser
modulation
laser gyroscope
subassembly
resonant
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.)
Granted
Application number
CN202211255217.8A
Other languages
Chinese (zh)
Other versions
CN115326110B (en
Inventor
李永德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Tulin Science And Technology Co ltd
Original Assignee
Sichuan Tulin Science And Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sichuan Tulin Science And Technology Co ltd filed Critical Sichuan Tulin Science And Technology Co ltd
Priority to CN202211255217.8A priority Critical patent/CN115326110B/en
Publication of CN115326110A publication Critical patent/CN115326110A/en
Application granted granted Critical
Publication of CN115326110B publication Critical patent/CN115326110B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C25/00Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
    • G01C25/005Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J4/00Measuring polarisation of light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Manufacturing & Machinery (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Gyroscopes (AREA)

Abstract

The invention relates to the technical field of laser gyroscopes, in particular to a device and a method for detecting a resonant light path of a cavity of a laser gyroscope. The base is provided with the quiet dynamic state detection subassembly that is used for static state detection and dynamic state detection to switch on the base, is provided with fixed centre gripping subassembly on the quiet dynamic state detection subassembly, and the open end centre gripping of fixed centre gripping subassembly has the shield cover, and the inside of shield cover is provided with the laser gyro, still is provided with on the base and closes a modulation subassembly, closes to be provided with on the modulation subassembly and closes a modulation passageway. According to the invention, high-precision feedback control is introduced by utilizing polarization synthesis of the reference beam and the resonant beam, so that phase locking is realized, coherent superposition of the reference beam and the resonant beam is further realized, integrated output is realized by a JME method, the degree of emergent light modulation of the laser gyroscope is judged, and the problem that the laser gyroscope generating amplitude modulation needs to be completely disassembled and reassembled is avoided.

Description

Device and method for detecting resonant light path of cavity of laser gyroscope
Technical Field
The invention relates to the technical field of laser gyros, in particular to a device and a method for detecting a resonant light path of a cavity of a laser gyroscope.
Background
The laser gyro is a device for measuring angular displacement of an object by utilizing the optical path difference of laser beams, and basic elements forming the laser gyro comprise a helium-neon laser (or a semiconductor laser), a total reflector and a semi-permeable semi-reflector, and the laser gyro integrates the top technologies such as light collection, machinery, electricity, calculation and the like, thereby widely covering a plurality of fields of land, sea, air and space, and the laser gyro is one of important marks for measuring the development level of the national optical technology.
In view of the fact that the detection of the output signal characteristic of the laser gyroscope is mainly performed on the finished laser gyroscope at present, the laser gyroscope generating amplitude modulation needs to be completely disassembled and reassembled. Therefore, if the characteristic detection of the laser gyro cavity resonant light path is started, the degree of the emergent light intensity modulation of the laser gyro can be detected and judged by a simple and easy resonant light path characteristic detection means before assembly is omitted, parts which do not meet requirements can be repaired in time, and the disassembly and reassembly of finished products can be reduced, so that the detection and production efficiency of the laser gyro can be obviously improved, the manufacturing period can be shortened, and the production cost can be reduced.
Based on the situation, from the characteristic detection of the laser gyroscope cavity resonant light path, the detection and judgment of the modulation degree of the emergent light intensity of the laser gyroscope before the assembly by the resonant light path characteristic detection means have great strategic and production significance.
Disclosure of Invention
The invention aims to provide a device for detecting a laser gyroscope cavity resonance light path, which is used for detecting and judging the emergent light modulation degree of a laser gyroscope through a resonance light path characteristic detection means before complete assembly from the characteristic detection of the laser gyroscope cavity resonance light path; the method is used for detecting the coupling polarization state of emergent light of the laser gyroscope in static and dynamic environments of the laser gyroscope.
The invention is realized by the following technical scheme:
the utility model provides a detect laser gyroscope cavity resonance light path device, includes the base, be provided with the quiet dynamic detection subassembly that is used for static detection and dynamic detection to switch on the base, be provided with fixed centre gripping subassembly on the quiet dynamic detection subassembly, the open end centre gripping of fixed centre gripping subassembly has the shield cover, the inside of shield cover is provided with the laser gyro, still be provided with on the base and close a modulation subassembly, it closes a modulation passageway to be provided with on the modulation subassembly to close, close in the beam modulation subassembly light compensation driving source can produce the reference beam and transmit to the resonant cavity of laser gyro through closing a modulation passageway, and the reference beam takes place polarization synthesis with the resonant beam in the resonant cavity and produces and close a laser, it judges the photic degree of outgoing light modulation of laser gyro to close a modulation subassembly to integrate output through the JME method. In the prior art, detection of the output signal characteristics of the laser gyroscope is mainly performed on a finished laser gyroscope, and for the laser gyroscope generating amplitude modulation, all the laser gyroscopes need to be disassembled and reassembled. It should be further noted that, due to the stress action on the optical cement bonding surface of the resonant cavity of the laser gyroscope, the incidence relation of the laser gyroscope cannot always maintain the brewster angle in the jittering state, and even in the static state, the production process treatment of the laser gyroscope can introduce internal stress into the laser gyroscope, so that the optical axis surface of the resonant cavity is not coplanar, and the precision of the laser gyroscope is further affected.
In view of the above, a device for detecting a resonant light path of a cavity of a laser gyroscope is provided, specifically, a static detection environment and a dynamic detection environment are set by a static and dynamic detection component capable of switching between static detection and dynamic detection, and high-precision feedback control is introduced by utilizing polarization synthesis of a reference beam and a resonant beam, so that phase locking is realized, and coherent superposition of the reference beam and the resonant beam is further realized. The method realizes the integration output by the JME method and judges the light modulation degree of the laser gyro emergent light, and avoids the problem that the laser gyro generating amplitude modulation needs to be completely disassembled and reassembled.
Further, the beam combining modulation component comprises: the laser phase locking device comprises a polarization phase detector, a linear servo circuit, a voltage-controlled oscillator and a modulation unit, wherein the modulation unit is used for controlling the frequency shift quantity of a reference beam and a resonant cavity resonant beam, the voltage-controlled oscillator is in signal connection with the modulation unit and is used for precisely adjusting the frequency shift quantity, the polarization phase detector is in signal connection with the modulation unit and is used for detecting a polarization phase signal of a beam-combined laser, the polarization phase detector is in signal connection with the linear servo circuit, the linear servo circuit is used for receiving the polarization phase signal and forming a feedback execution signal after circuit amplification and filtering, the voltage-controlled oscillator is further in signal connection with the linear servo circuit and receives the feedback execution signal, the frequency shift quantity is precisely adjusted according to the feedback execution signal, and when the frequency shift quantity reaches laser phase locking, the polarization state is uniquely determined. Based on the components, a beam combination laser control assembly based on polarization state detection and a beam combination coherent superposition state is established, and a corresponding physical model can be established by using the assembly, so that the unique polarization state is determined.
Further, quiet dynamic state detection subassembly includes motor and vibration part, the output of motor with vibration part is connected, fixed centre gripping subassembly includes: the vibration part comprises a plurality of clamping claws, a chassis, a supporting disk and a plurality of supporting pieces, wherein the output end of the vibration part is fixedly connected with the chassis, the supporting pieces are uniformly distributed on the upper end face of the chassis at intervals and fixedly connected with the lower end face of the supporting disk, and the plurality of clamping claws are arranged on the supporting disk in a sliding mode and abutted to the shielding cover. It should be noted that, for the static and dynamic detection component, the laser gyro integrates the advanced technologies such as light collection, mechanical, electrical, calculation, etc. and widely covers a plurality of fields in land, sea, air and space, so it is necessary to research the detection process under static and dynamic conditions. Based on the steps, the switching of the laser gyroscope under dynamic and static conditions can be met, the high symmetry of the fixed clamping assembly can effectively improve the clamping precision of the laser gyroscope, and the influence of accidental errors on detection results is avoided to the greatest extent.
Further, the fixed clamp assembly further comprises: cylinder, rotation piece and a plurality of slider, a plurality of slider interval equipartition is in on the supporting disk, the gripper jaw with the slider slides and sets up and the bottom runs through the slider, it includes to rotate the piece: carousel, a plurality of moving part and slider, the both ends of cylinder are connected with the slider of two symmetry settings, this slider with gripper jaw's bottom fixed connection, and the axis of this slider and cylinder is in the coplanar all the time, the carousel sets up the below at supporting disk middle part, and with the supporting disk rotates and sets up, the moving part interval equipartition articulates in the circumference of carousel, and the expansion end with gripper jaw's bottom is articulated. It should be further noted that, in order to increase the disorder of the dynamic conditions and better fit the use environment of the laser gyroscope, the sliding block is arranged on the supporting disk, and the bottom of the clamping claw penetrates through the sliding block to be connected with the moving part or the sliding part.
A method for detecting a resonant light path of a cavity of a laser gyroscope comprises the following steps: step 1, fixing a laser gyroscope, and mounting the laser gyroscope which is not completely assembled on a fixed clamping assembly; step 2, checking the occurrence of the light path, checking the occurrence of the resonant beam in the resonant cavity after the installation of the step 1 is correct, and checking the occurrence of the reference beam in the beam combining modulation channel; step 3, polarization synthesis, wherein after the step 2 is verified to be correct, a light compensation driving source in the beam combination modulation assembly is started to generate a reference beam, and the reference beam is emitted into the resonant cavity through the beam combination modulation channel to be subjected to polarization synthesis with the resonant beam to generate a combined laser; and 4, adjusting frequency shift quantity, detecting a polarization phase signal of the combined laser through a polarization phase detector after the combined laser is generated in the step 3, transmitting the polarization phase signal to a linear servo circuit, amplifying and filtering the polarization phase signal through a circuit by the linear servo circuit structure to form a feedback execution signal, transmitting the feedback execution signal to a voltage-controlled oscillator, adjusting the frequency shift quantity after the voltage-controlled oscillator receives the feedback execution signal until the frequency shift quantity reaches laser phase locking, and enabling the polarization state to be unique. Based on the steps, the polarization state under the static environment can be effectively detected.
Further, still include: and (4) analyzing the modulation degree, integrating and outputting an actual value of the laser gyro emergent light modulation by the modulation unit through a JME (joint measurement and integration) method after the unique polarization state in the step (4) is obtained, introducing a theoretical value of the laser gyro emergent light modulation, and judging the degree of the laser gyro emergent light modulation by analyzing the actual value and the theoretical value. Because the output signal characteristic detection of the laser gyroscope is mainly performed on the finished laser gyroscope, the laser gyroscope generating amplitude modulation needs to be completely disassembled and reassembled. When the laser gyroscope which is not completely assembled needs to be detected, on the basis of the detected polarization state, the actual value of the emergent light modulation of the laser gyroscope can be integrally output through a JME method, the theoretical value of the emergent light modulation of the laser gyroscope is introduced, and the degree of the emergent light modulation of the laser gyroscope is judged through analyzing the actual value and the theoretical value.
Further, the method for detecting the resonant light path of the cavity of the laser gyroscope further comprises the following steps: and (5) dynamic detection, starting the static and dynamic detection assembly, and repeating the steps 1 to 4 to obtain the emergent light polarization state of the laser gyroscope under the dynamic condition, wherein the laser gyroscope is in a disordered jitter state at the moment. Based on the steps, the detection of the polarization state can be completed in a dynamic environment.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the static and dynamic detection environment and the dynamic detection environment are set through the static and dynamic detection assembly capable of switching static detection and dynamic detection, and high-precision feedback control is introduced by utilizing polarization synthesis of the reference light beam and the resonance light beam, so that phase locking is realized, coherent superposition of the reference light beam and the resonance light beam is further realized, integrated output is realized through a JME method, the degree of emergent light modulation of the laser gyroscope is judged, and the problem that the laser gyroscope generating amplitude modulation needs to be completely disassembled and reassembled is avoided;
2. the polarization phase detector detects the polarization phase signal of the beam-combined laser and transmits the polarization phase signal to the linear servo circuit, the linear servo circuit is structured to amplify and filter the polarization phase signal through the circuit to form a feedback execution signal, and transmits the feedback execution signal to the voltage-controlled oscillator, and the voltage-controlled oscillator receives the feedback execution signal and then adjusts the frequency shift amount until the frequency shift amount reaches the laser phase lock, at the moment, the polarization state is unique, and the detection of the emergent light coupling polarization state under the static and dynamic environments of the laser gyroscope is realized;
3. the fixed clamping assembly and the static and dynamic detection assembly can synchronously clamp and fix the laser gyroscope under static and dynamic conditions.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic diagram of the connection of the beam combining modulation assembly;
FIG. 3 is a schematic view of a fixing clamp assembly;
fig. 4 is a schematic diagram of polarization synthesis.
Reference numbers and corresponding part names in the figures:
1-laser gyro, 2-base, 3-static and dynamic detection component, 31-motor, 32-vibration component, 4-fixed clamping component, 41-clamping claw, 42-base plate, 43-supporting plate, 44-supporting piece, 45-air cylinder, 46-rotating piece, 461-rotating disc, 462-moving piece, 463-sliding piece, 47-sliding block, 5-shielding cover, 6-beam combination modulation component and 7-beam combination modulation channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention. It should be noted that the present invention is in practical development and use.
Example 1:
as shown in fig. 1-2, a detect laser gyroscope cavity resonance light path device, including base 2, be provided with the quiet dynamic detection subassembly 3 that is used for static detection and dynamic detection to switch on the base 2, be provided with fixed centre gripping subassembly 4 on the quiet dynamic detection subassembly 3, the open end centre gripping of fixed centre gripping subassembly 4 has shield cover 5, the inside of shield cover 5 is provided with laser gyroscope 1, still be provided with on the base 2 and close and restraint modulation subassembly 6, it closes and is provided with and restraints modulation passageway 7 on the modulation subassembly 6 to close, close in the beam modulation subassembly 6 light compensation driving source can produce reference beam and pass through and close and restraint modulation passageway 7 and transmit to the resonant cavity of laser gyroscope 1, reference beam and the resonant beam in the resonant cavity and take place polarization synthesis and produce and restraint laser, it adjusts the degree of output judgement laser gyroscope 1 outgoing to close and restraint modulation subassembly 6 and integrate through the JME method.
In the prior art, the detection of the output signal characteristics of the laser gyroscope 1 is mainly performed on the finished laser gyroscope 1, and all the laser gyroscopes 1 which generate amplitude modulation need to be disassembled and reassembled. It should be further noted that, a stress action exists on the optical cement bonding surface of the resonant cavity of the laser gyroscope 1, so that the incident relation of the laser gyroscope 1 cannot always maintain the brewster angle in a jittering state, even under a static state, the production process treatment of the laser gyroscope 1 can introduce internal stress into the laser gyroscope 1, so that the optical axis surfaces of the resonant cavity are not coplanar, and the precision and the like of the laser gyroscope 1 are further influenced. The fixed clamping assembly 4 can be a chuck, but the prior art chuck has the problem of low synchronous control precision. The static detection environment can be regarded as an ideal static state, even if the static detection environment cannot be regarded as the ideal static state, the influence of environmental factors can be reduced by applying reverse compensation to the laser gyro 1 through the static and dynamic detection component 3. For the dynamic detection environment, up-and-down shaking is possible, and left-and-right rotation is also possible, and disordered shaking with the preferable effect is preferable. As for the shield case 5, it is preferable that the electromagnetic shield case 5 can also effectively reduce the influence factors other than the photoelectricity. The beam combining modulation channel 7 is preferably a prism tunnel to support the reference beam passage. The JME method is preferably a Jones matrix feature analysis method.
In view of the above, a device for detecting a resonant light path of a cavity of a laser gyroscope is provided, specifically, a static detection environment and a dynamic detection environment are set by a static and dynamic detection component 3 capable of switching between static detection and dynamic detection, and high-precision feedback control is introduced by polarization synthesis of a reference beam and a resonant beam, so that phase locking is realized, and coherent superposition of the reference beam and the resonant beam is further realized. The method realizes the integration output by the JME method and judges the light modulation degree of the laser gyro 1, and avoids the problem that the laser gyro 1 generating amplitude modulation needs to be completely disassembled and reassembled.
It should be noted that the beam combining and modulating assembly 6 includes: the laser phase locking device comprises a polarization phase detector, a linear servo circuit, a voltage-controlled oscillator and a modulation unit, wherein the modulation unit is used for controlling the frequency shift quantity of a reference beam and a resonant cavity resonant beam, the voltage-controlled oscillator is in signal connection with the modulation unit and is used for precisely adjusting the frequency shift quantity, the polarization phase detector is in signal connection with the modulation unit and is used for detecting a polarization phase signal of a beam-combined laser, the polarization phase detector is in signal connection with the linear servo circuit, the linear servo circuit is used for receiving the polarization phase signal and forming a feedback execution signal after circuit amplification and filtering, the voltage-controlled oscillator is further in signal connection with the linear servo circuit and receives the feedback execution signal, the frequency shift quantity is precisely adjusted according to the feedback execution signal, and when the frequency shift quantity reaches laser phase locking, the polarization state is uniquely determined. Based on the components, a combined beam laser control assembly based on polarization state detection and beam combination coherent superposition states is established, and a corresponding physical model can be established by using the assembly, so that the unique polarization state is determined. For the linear servo circuit, a PID circuit may be used. For the amount of frequency shift, it is less than 150MHz. For the modulation unit, a modulator connected with a processor can be used, and the polarization phase detector is a photoelectric detector.
It should be noted that the static and dynamic detection assembly 3 includes a motor 31 and a vibration component 32, an output end of the motor 31 is connected to the vibration component 32, and the fixed clamping assembly 4 includes: the vibration part comprises a plurality of clamping claws 41, a chassis 42, a supporting plate 43 and a plurality of supporting pieces 44, wherein the output end of the vibration part 32 is fixedly connected with the chassis 42, the supporting pieces 44 are uniformly distributed on the upper end face of the chassis 42 at intervals and fixedly connected with the lower end face of the supporting plate 43, and the plurality of clamping claws 41 are arranged on the supporting plate 43 in a sliding mode and are abutted to the shielding cover 5. It should be noted that, for the static and dynamic detection component 3, since the laser gyro 1 integrates the advanced technologies such as light collection, mechanical, electrical, calculation, etc., and widely covers a plurality of fields in land, sea, air and space, it is necessary to research the detection process under static and dynamic conditions. Based on the steps, the switching of the laser gyroscope 1 under dynamic and static conditions can be met, the clamping precision of the laser gyroscope 1 can be effectively improved due to the high symmetry of the fixed clamping assembly 4, and the influence of accidental errors on detection results is avoided to the greatest extent.
A method for detecting a resonant light path of a cavity of a laser gyroscope comprises the following steps: step 1, fixing a laser gyroscope 1, and installing the laser gyroscope 1 which is not completely assembled on a fixed clamping component 4; step 2, checking the occurrence of the light path, checking the occurrence of the resonant beam in the resonant cavity after the installation of the step 1 is correct, and checking the occurrence of the reference beam in the beam combining modulation channel 7; step 3, polarization synthesis, namely after the error is verified in the step 2, starting a light compensation driving source in the beam combination modulation assembly 6 to generate a reference beam, and transmitting the reference beam into the resonant cavity through a beam combination modulation channel 7 to be subjected to polarization synthesis with the resonant beam to generate a combined beam laser; and 4, adjusting frequency shift amount, detecting a polarization phase signal of the combined laser through a polarization phase detector after the combined laser is generated in the step 3, transmitting the polarization phase signal to a linear servo circuit, amplifying and filtering the polarization phase signal through a circuit by the linear servo circuit structure to form a feedback execution signal, transmitting the feedback execution signal to a voltage-controlled oscillator, adjusting the frequency shift amount after the voltage-controlled oscillator receives the feedback execution signal until the frequency shift amount reaches laser phase locking, and enabling the polarization state to be unique. Based on the steps, the polarization state under the static environment can be effectively detected.
It should be noted that the method further includes: and (4) analyzing the modulation degree, integrating and outputting an actual value of the emergent light modulation of the laser gyro 1 by the modulation unit through a JME (joint management entity) method after the unique polarization state in the step (4) is obtained, introducing a theoretical value of the emergent light modulation of the laser gyro 1, and judging the emergent light modulation degree of the laser gyro 1 by analyzing the actual value and the theoretical value. Because the detection of the output signal characteristic of the laser gyroscope 1 is mainly performed for the finished laser gyroscope 1, the laser gyroscope 1 generating amplitude modulation needs to be completely disassembled and reassembled. When the laser gyro 1 which is not completely assembled needs to be detected, on the basis of the detected polarization state, the actual value of the emergent light modulation of the laser gyro 1 can be integrated and output through a JME method, the theoretical value of the emergent light modulation of the laser gyro 1 is introduced, and the degree of the emergent light modulation of the laser gyro 1 is judged by analyzing the actual value and the theoretical value.
It should be noted that the method for detecting the cavity resonance optical path of the laser gyroscope 1 further includes: and (4) dynamic detection, namely starting the static and dynamic detection assembly 3, wherein the laser gyroscope 1 is in a disordered shaking state at the moment, and repeating the steps 1 to 4 to obtain the emergent light polarization state of the laser gyroscope 1 under the dynamic condition. Based on the steps, the detection of the polarization state can be completed in a dynamic environment.
Example 2:
this example describes only the portions different from example 1, specifically: it should be noted that, as shown in fig. 3, the fixed clamping assembly 4 further includes: cylinder 45, rotate 46 and a plurality of slider 47, a plurality of slider 47 interval equipartition is in on the supporting disk 43, gripper jaw 41 with slider 47 slides and sets up and the bottom is run through slider 47, it includes to rotate 46: the clamping device comprises a rotary disc 461, a plurality of movable members 462 and a sliding member 463, wherein two ends of the air cylinder 45 are connected with two sliding members 463 which are symmetrically arranged, the sliding member 463 is fixedly connected with the bottom of the clamping claw 41, the axes of the sliding member 463 and the air cylinder 45 are always in the same plane, the rotary disc 461 is arranged below the middle part of the supporting disc 43 and is rotatably arranged with the supporting disc 43, the movable members 462 are uniformly and circumferentially hinged on the rotary disc 461, and the movable ends are hinged with the bottom of the clamping claw 41. It should be noted that, in order to increase the disorder of the dynamic conditions and to better conform to the usage environment of the laser gyroscope 1, the sliding block 47 is disposed on the supporting plate 43, and the bottom of the clamping claw 41 penetrates through the sliding block 47 to be connected to the movable element 462 or the sliding element 463, when the air cylinder 45 is started to contract, the sliding elements 463 at both ends of the air cylinder 45 are driven to move toward the axis of the supporting plate 43, and since the rotating disc 461 is rotatably disposed below the supporting plate 43 and is circumferentially connected to the movable element 462, the clamping claw 41 is finally driven to synchronously move toward the axis of the supporting plate 43, thereby achieving the clamping function.
Example 3:
preferably, the principle related to polarization synthesis is explained here, as shown in fig. 4, the reference beam and the resonant beam are subjected to primary amplification, frequency shift by the modulator and secondary amplification, the polarization state is modulated by the half-wave plate, the laser beam is output by the polarization splitting prism, and then the angle of the half-wave plate is finely adjusted, so that the laser with smaller power is separated for laser polarization phase control, and most of the laser after combination can keep linear polarization state output after polarization adjustment by the polarization device.
The light compensation driving source is single-frequency narrow linewidth laser with 1064nm, the output power is about 40mW, the linewidth is less than 100KHz,
the above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. The utility model provides a detect laser gyroscope cavity resonance light path device, includes base (2), its characterized in that: be provided with on base (2) and be used for static dynamic detection subassembly (3) that static detection and dynamic detection switch, be provided with fixed centre gripping subassembly (4) on static dynamic detection subassembly (3), the open end centre gripping of fixed centre gripping subassembly (4) has shield cover (5), the inside of shield cover (5) is provided with laser gyro (1), still be provided with on base (2) and close a modulation subassembly (6), it closes a modulation passageway (7) to be provided with on a modulation subassembly (6), the light compensation driving source in the modulation subassembly (6) of closing can produce the reference beam and transmit to the resonant cavity of laser gyro (1) through closing a modulation passageway (7), and the resonance light beam in reference beam and the resonant cavity takes place polarization synthesis and produces and close a bundle laser, close a modulation subassembly (6) and carry out the integration output through the JME method and judge the degree that laser gyro (1) emergent light was modulated.
2. The device for detecting the cavity resonance light path of the laser gyroscope as claimed in claim 1, wherein: the beam combining modulation assembly (6) comprises: the laser phase locking device comprises a polarization phase detector, a linear servo circuit, a voltage-controlled oscillator and a modulation unit, wherein the modulation unit is used for controlling the frequency shift quantity of a reference beam and a resonant cavity resonant beam, the voltage-controlled oscillator is in signal connection with the modulation unit and is used for precisely adjusting the frequency shift quantity, the polarization phase detector is in signal connection with the modulation unit and is used for detecting a polarization phase signal of a beam-combined laser, the polarization phase detector is in signal connection with the linear servo circuit, the linear servo circuit is used for receiving the polarization phase signal and forming a feedback execution signal after circuit amplification and filtering, the voltage-controlled oscillator is further in signal connection with the linear servo circuit and receives the feedback execution signal, the frequency shift quantity is precisely adjusted according to the feedback execution signal, and when the frequency shift quantity reaches laser phase locking, the polarization state is uniquely determined.
3. The device for detecting the cavity resonance light path of the laser gyroscope as claimed in claim 1, wherein: quiet dynamic testing subassembly (3) include motor (31) and vibration part (32), the output of motor (31) with vibration part (32) are connected, fixed centre gripping subassembly (4) include: a plurality of gripper jaw (41), chassis (42), supporting disk (43) and a plurality of support piece (44), the output of vibration part (32) with chassis (42) fixed connection, a plurality of support piece (44) interval equipartition is in the up end of chassis (42) and with the lower terminal surface fixed connection of supporting disk (43), a plurality of gripper jaw (41) slide and set up on supporting disk (43) and with shield cover (5) butt.
4. The device for detecting the cavity resonance light path of the laser gyroscope as claimed in claim 3, wherein: the fixed clamping assembly (4) further comprises: cylinder (45), rotation piece (46) and a plurality of slider (47), a plurality of slider (47) interval equipartition is in on supporting disk (43), gripper jaw (41) with slider (47) slide to set up and the bottom runs through slider (47), it includes to rotate piece (46): carousel (461), a plurality of moving part (462) and slider (463), the both ends of cylinder (45) are connected with slider (463) that two symmetries set up, this slider (463) with the bottom fixed connection of gripper jaw (41), and this slider (463) is in the coplanar with the axis of cylinder (45) all the time, carousel (461) sets up the below at supporting disk (43) middle part, and with supporting disk (43) rotate and set up, moving part (462) interval equipartition articulates in the circumference of carousel (461), and the expansion end with the bottom of gripper jaw (41) is articulated.
5. A method for detecting a resonant light path of a cavity of a laser gyroscope is characterized by comprising the following steps: the device for detecting the cavity resonance light path of the laser gyro based on any one of claims 1 to 4 comprises the following steps:
step 1, fixing a laser gyroscope (1), and installing the laser gyroscope (1) which is not completely assembled on a fixed clamping component (4);
step 2, checking the occurrence of the light path, checking the occurrence of the resonant light beam in the resonant cavity after the installation of the step 1 is correct, and checking the occurrence of the reference light beam in the beam combining modulation channel (7);
step 3, polarization synthesis, namely after the error is verified in the step 2, starting a light compensation driving source in the beam combination modulation assembly (6) to generate a reference beam, and transmitting the reference beam into the resonant cavity through a beam combination modulation channel (7) to be subjected to polarization synthesis with the resonant beam to generate a beam combination laser;
and 4, adjusting frequency shift quantity, detecting a polarization phase signal of the combined laser through a polarization phase detector after the combined laser is generated in the step 3, transmitting the polarization phase signal to a linear servo circuit, amplifying and filtering the polarization phase signal through a circuit by the linear servo circuit structure to form a feedback execution signal, transmitting the feedback execution signal to a voltage-controlled oscillator, adjusting the frequency shift quantity after the voltage-controlled oscillator receives the feedback execution signal until the frequency shift quantity reaches laser phase locking, and enabling the polarization state to be unique.
6. The method for detecting the cavity resonance light path of the laser gyroscope according to claim 5, characterized in that: further comprising: and (4) analyzing the modulation degree, integrating and outputting an actual value of the emergent light modulation of the laser gyroscope (1) by the modulation unit through a JME method after the unique polarization state in the step (4) is obtained, introducing a theoretical value of the emergent light modulation of the laser gyroscope (1), and judging the emergent light modulation degree of the laser gyroscope (1) by analyzing the actual value and the theoretical value.
7. The method for detecting the cavity resonant light path of the laser gyroscope according to claim 5, wherein the method comprises the following steps: the method for detecting the resonant light path of the cavity of the laser gyroscope further comprises the following steps: and (4) dynamic detection, namely starting the static and dynamic detection assembly (3), wherein the laser gyroscope (1) is in a disordered shaking state, and repeating the steps 1 to 4 to obtain the emergent light polarization state of the laser gyroscope (1) under the dynamic condition.
CN202211255217.8A 2022-10-13 2022-10-13 Device and method for detecting resonant light path of cavity of laser gyroscope Active CN115326110B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211255217.8A CN115326110B (en) 2022-10-13 2022-10-13 Device and method for detecting resonant light path of cavity of laser gyroscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211255217.8A CN115326110B (en) 2022-10-13 2022-10-13 Device and method for detecting resonant light path of cavity of laser gyroscope

Publications (2)

Publication Number Publication Date
CN115326110A true CN115326110A (en) 2022-11-11
CN115326110B CN115326110B (en) 2022-12-16

Family

ID=83913352

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211255217.8A Active CN115326110B (en) 2022-10-13 2022-10-13 Device and method for detecting resonant light path of cavity of laser gyroscope

Country Status (1)

Country Link
CN (1) CN115326110B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115632296A (en) * 2022-12-07 2023-01-20 四川图林科技有限责任公司 Triangular resonant cavity machining and assembling method

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141651A (en) * 1977-01-10 1979-02-27 Raytheon Company Laser gyroscope output optics structure
US4963026A (en) * 1988-03-14 1990-10-16 Litton Systems, Inc. Cavity length control apparatus for a multi-oscillator
EP0437020A2 (en) * 1990-01-12 1991-07-17 Litton Systems, Inc. Output optics detection system
US5189487A (en) * 1991-11-21 1993-02-23 Litton Systems, Inc. Multioscillator ring laser gyroscope local oscillator-based output optics detection system
CN102003958A (en) * 2010-10-01 2011-04-06 中国人民解放军国防科学技术大学 Control device for working point of four-frequency laser gyro
CN102012237A (en) * 2010-12-13 2011-04-13 西安北方捷瑞光电科技有限公司 Method for testing dynamic lock area of prismatic laser gyro
CN102147254A (en) * 2010-10-01 2011-08-10 中国人民解放军国防科学技术大学 Four-frequency laser gyro control method
CN102243136A (en) * 2011-04-14 2011-11-16 西安电子科技大学 Laser gyro optical resonant cavity loss measurement system based on resonance method
CN102506845A (en) * 2011-09-29 2012-06-20 中国航空工业第六一八研究所 Low loss measurement method and ring resonant cavity installation debugging system based on low loss measurement
CN103959013A (en) * 2011-09-29 2014-07-30 斯维尔系统 MEMS based ring laser gyroscope with reduced lock-in
CN103994774A (en) * 2013-12-16 2014-08-20 西安北方捷瑞光电科技有限公司 Double-longitudinal mode frequency self-offset detection system and detection method of prism laser gyro
US20150192417A1 (en) * 2014-01-08 2015-07-09 Honeywell International Inc. Ring laser gyroscope with integrated polarization
CN214470904U (en) * 2021-05-18 2021-10-22 四川图林科技有限责任公司 Device for detecting resonant light path of cavity of laser gyroscope

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141651A (en) * 1977-01-10 1979-02-27 Raytheon Company Laser gyroscope output optics structure
US4963026A (en) * 1988-03-14 1990-10-16 Litton Systems, Inc. Cavity length control apparatus for a multi-oscillator
EP0437020A2 (en) * 1990-01-12 1991-07-17 Litton Systems, Inc. Output optics detection system
US5189487A (en) * 1991-11-21 1993-02-23 Litton Systems, Inc. Multioscillator ring laser gyroscope local oscillator-based output optics detection system
CN102147254A (en) * 2010-10-01 2011-08-10 中国人民解放军国防科学技术大学 Four-frequency laser gyro control method
CN102003958A (en) * 2010-10-01 2011-04-06 中国人民解放军国防科学技术大学 Control device for working point of four-frequency laser gyro
CN102012237A (en) * 2010-12-13 2011-04-13 西安北方捷瑞光电科技有限公司 Method for testing dynamic lock area of prismatic laser gyro
CN102243136A (en) * 2011-04-14 2011-11-16 西安电子科技大学 Laser gyro optical resonant cavity loss measurement system based on resonance method
CN102506845A (en) * 2011-09-29 2012-06-20 中国航空工业第六一八研究所 Low loss measurement method and ring resonant cavity installation debugging system based on low loss measurement
CN103959013A (en) * 2011-09-29 2014-07-30 斯维尔系统 MEMS based ring laser gyroscope with reduced lock-in
CN103994774A (en) * 2013-12-16 2014-08-20 西安北方捷瑞光电科技有限公司 Double-longitudinal mode frequency self-offset detection system and detection method of prism laser gyro
US20150192417A1 (en) * 2014-01-08 2015-07-09 Honeywell International Inc. Ring laser gyroscope with integrated polarization
CN214470904U (en) * 2021-05-18 2021-10-22 四川图林科技有限责任公司 Device for detecting resonant light path of cavity of laser gyroscope

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHENGKANG YAO 等: "Study on the Output Signal Modulation for Laser Gyro with Mechanical Dither Bias", 《APPLIED MECHANICS AND MATERIALS》 *
SIDNEY I. WAX: "Phase Modulation of a Ring-Laser Gyro-Part I Theory", 《 IEEE JOURNAL OF QUANTUM ELECTRONICS》 *
姚呈康: "机械抖动棱镜式激光陀螺输出信号特性研究", 《中国博士学位论文全文数据库 信息科技辑》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115632296A (en) * 2022-12-07 2023-01-20 四川图林科技有限责任公司 Triangular resonant cavity machining and assembling method

Also Published As

Publication number Publication date
CN115326110B (en) 2022-12-16

Similar Documents

Publication Publication Date Title
CN115326110B (en) Device and method for detecting resonant light path of cavity of laser gyroscope
JP2005500538A (en) Method and apparatus for detection and control of light beam alignment
CN108288815B (en) Annular laser resonant cavity diaphragm assembling and adjusting system and assembling and adjusting method thereof
CN102889929A (en) Method for calibrating wavelength of ultraviolet spectrograph
CN114300918B (en) Ultra-stable narrow linewidth laser system and coupling adjustment method
JP2003035603A (en) Light sampling waveform observing apparatus
CN112857591B (en) Single laser source optical fiber laser system for cold atom interferometer
KR20150061686A (en) Gas Detection Apparatus and Gas Detection Method
Kwee Laser characterization and stabilization for precision interferometry
CN103308460B (en) A kind of micro spectrometer based on micro electronmechanical interference platform
CN109521655B (en) Fringe locking type holographic interference lithography system and fringe locking method
Grote Making it Work: Second Generation Interferometry in GEO600!
CN113358222B (en) High-precision locking ring-down device and measuring method
Sun et al. Frequency stabilization of a single-frequency all-solid-state laser for Doppler wind lidar
Karan Demonstration of a Dual Cavity Configuration for next Generation Light-Shining-Through-a-Wall Experiments
CN115149386B (en) Automatic laser frequency stabilization control system based on FPGA
CN116224627B (en) Alignment system and method of polarization modulation equipment
CN102944232A (en) On-line alignment device and on-line alignment method of fiber-optic gyroscope modulating voltage
CN216246790U (en) Non-contact vibration measurement system with inspection function
Li et al. Double sinusoidal phase modulating laser diode interferometer for thickness measurements of transparent plates
JPH0710507Y2 (en) Laser doppler velocimeter
JP2591610Y2 (en) Optical frequency modulation characteristics measurement device
Romann et al. Automatic alignment of a rigid spacer cavity
JPS5852891A (en) Stabilizer for frequency of laser
CN116799593A (en) Detection device and method for laser beam self-calibration

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
GR01 Patent grant
GR01 Patent grant