Quantum noise compression type laser gyroscope

Abstract

The invention provides a quantum noise compression type laser gyroscope. The laser gyroscope comprises a microcrystalline glass cavity, a cavity length adjusting mechanism, a mechanical shaking wheel, an output mirror and a reflecting mirror, a mirror mounting surface and a cavity length adjusting mechanism mounting surface are arranged on the side surface of the glass ceramic cavity, the reflecting mirror and the output mirror are respectively arranged on the mirror mounting surface, and the cavity length adjusting mechanism is arranged on the cavity length adjusting mechanism mounting surface; the microcrystalline glass cavity is supported on the machine shaking wheel through the shaking wheel mounting hole; an inner cavity of the glass ceramic cavity is a resonant cavity, and a plurality of layers of annular light paths are formed in the resonant cavity. According to the quantum noise compression type laser gyroscope provided by the invention, the light path length can be multiplied under the condition that the thickness and the weight of the laser gyroscope are slightly increased, and the luminous flux can be increased at the same time, so that the limit precision of the laser gyroscope is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of laser gyroscopes, and in particular relates to a quantum noise compression type laser gyroscope. Background Art

[0002] The laser gyro is the core component of the inertial navigation system, which determines the positioning and orientation performance of weapons and equipment such as missiles, aircraft, and ships. The most critical error term of the laser gyro is the angle random walk error, which directly determines the ultimate accuracy of the navigation system. In the dual-frequency machine-jitter laser gyro, the angle random walk error is mainly composed of two parts: the jitter over-lock zone error and quantum noise. With the continuous improvement of the laser gyro manufacturing process, the diaphragm reflectivity can reach a very high level, so the contribution rate of the lock zone to the random walk gradually decreases. A large amount of test data shows that the accuracy of the laser gyro based on the 632.8nm red light wavelength has reached the quantum noise limit. Under the premise of a fixed wavelength, the main way to improve the gyro accuracy is to increase the geometric size of the gyro. However, the increase in the geometric size of the gyro means an increase in the volume and weight of the entire inertial navigation system, an increase in the payload burden on the equipment, and a significant reduction in practicality.

[0003] like Figure 1 As shown in the prior art, 110 is a laser gyro cavity, 121, 122, 123, 124 are four sides of a square annular optical path, 131 is a cathode, 132 is an anode, 141 and 142 are signal output mirrors, 150 is a cavity length adjustment device, and 160 is a dither bias frequency driving device. The optical path structure of a conventional laser gyro is shown in FIG. Figure 2 As shown, when the wavelength is fixed at 632.8nm, the only way to further improve the gyro accuracy is to increase the length of the gyro's annular optical path, which requires increasing the gyro's geometric dimensions. The increase in the gyro's geometric dimensions will increase the volume and weight of the entire inertial navigation system, and the load burden on the equipment will increase.

[0004] Based on the technical problems existing in the above-mentioned laser gyroscope, there is no relevant solution yet; therefore, it is urgent to find an effective solution to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the above-mentioned technologies and to propose a quantum noise compression laser gyroscope, aiming to solve one of the problems of existing laser gyroscopes, namely, large size, heavy weight and low precision.

[0006] The present invention provides a quantum noise compression laser gyroscope, which comprises a glass-ceramic cavity, a cavity length adjustment mechanism, a machine shaking wheel, an output mirror and a reflecting mirror; a mirror mounting surface and a cavity length adjustment mechanism mounting surface are provided on the side of the glass-ceramic cavity, the reflecting mirror and the output mirror are respectively arranged on the mirror mounting surface, and the cavity length adjustment mechanism is arranged on the cavity length adjustment mechanism mounting surface; the glass-ceramic cavity is supported on the machine shaking wheel through a shaking wheel mounting hole; the inner cavity of the glass-ceramic cavity is a resonant cavity, and a multi-layer annular optical path is formed in the resonant cavity.

[0007] In some embodiments, the annular light path is a two-layer annular light path or a three-layer annular light path; the light paths of the multi-layer annular light paths are connected by a reflector to form a closed annular light path.

[0008] In some embodiments, each layer of the annular light path is a regular polygonal annular light path.

[0009] In some embodiments, the shape of each layer of the annular light path is the same, and the size of each layer of the annular light path is the same.

[0010] In some embodiments, the distance d between two adjacent layers of annular light paths is equal.

[0011] In some embodiments, the normal incident angle and the exit angle of two adjacent annular light paths are symmetrical; a mirror mounting surface is provided at the intersection of two adjacent annular light paths, and the mirror mounting surface is perpendicular to the normal of the two adjacent annular light paths.

[0012] In some embodiments, the reflector is a plane reflector, the output mirror is a semi-transparent and semi-reflective mirror, and the output mirror includes a first output mirror and a second output mirror; the mounting surface of the cavity length adjustment mechanism is a spherical reflector mounting surface, the mirror mounting surface and the spherical reflector mounting surface are respectively arranged at the intersection of two adjacent layers of annular light paths, and the mirror mounting surface includes a first semi-transparent and semi-reflective mounting surface and a second semi-transparent and semi-reflective mounting surface; the first output mirror is arranged on the first semi-transparent and semi-reflective mounting surface, and the second output mirror is arranged on the second semi-transparent and semi-reflective mounting surface; a DC phototube is provided on the first output mirror, and a light-combining prism and an AC phototube are provided on the second output mirror; the cavity length adjustment mechanism includes a spherical reflector, and the spherical reflector is arranged on the spherical reflector mounting surface, for adjusting the cavity length of the microcrystalline glass cavity.

[0013] In some embodiments, the lengths L1 of the light path sides of the annular light path planes in the same layer are equal; the lengths L2 of the light path sides of the light path planes in another adjacent layer are equal; the distance between the light path planes of two adjacent layers is d; and L2 satisfies:

[0014]

[0015] In some embodiments, a shaking wheel mounting hole is provided at the center of the microcrystalline glass cavity, and a mechanical shaking wheel is arranged in the shaking wheel mounting hole; piezoelectric ceramics are mounted on the spokes of the mechanical shaking wheel, and the mechanical shaking wheel is driven by the deformation of the piezoelectric ceramics to drive the microcrystalline glass cavity to shake back and forth to generate positive and negative alternating shaking deviation frequencies.

[0016] In some embodiments, the laser gyroscope further includes a cathode and an anode; the cathode is disposed on one side of the microcrystalline glass cavity and is used to connect to the negative high voltage end of the laser gyroscope high voltage ignition circuit; the anode is disposed on the other side of the microcrystalline glass cavity and is used to connect to the ground end of the laser gyroscope high voltage ignition circuit.

[0017] The quantum noise compression laser gyroscope proposed in the present invention adopts a folded multi-layer annular optical path structure, which can increase the optical path length exponentially while only slightly increasing the thickness and weight of the laser gyroscope, and at the same time increase the light flux, thereby improving the ultimate accuracy of the laser gyroscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 Schematic diagram of the traditional laser gyro structure with a single-layer annular optical path;

[0021] Figure 2 This is a schematic diagram of the optical path of a traditional laser gyroscope;

[0022] Figure 3 It is a schematic diagram of the optical path of the quantum noise compression laser gyroscope of the present invention;

[0023] Figure 4 Schematic diagram of the spot radius distribution at different positions in the cavity of the traditional laser gyroscope and the quantum noise compression laser gyroscope;

[0024] Figure 5 Schematic diagram of the ratio of spot radius at different positions in the cavity of a traditional laser gyro and a quantum noise compression laser gyro;

[0025] Figure 6 It is a schematic diagram of the structure of the quantum noise compression laser gyroscope with a folded double-layer optical path of the present invention;

[0026] Figure 7 It is a partial example diagram of the optical path structure of the quantum noise compression laser gyroscope of the present invention;

[0027] Figure 8 It is an overall schematic diagram of the quantum noise compression laser gyroscope of the present invention;

[0028] Fig. 9 It is a perspective view of the quantum noise compression laser gyroscope of the present invention.

[0029] In the figure: 110, laser gyro cavity; 121, first annular light path edge; 122, second annular light path edge; 123, third annular light path edge; 124, fourth annular light path edge; 131, cathode; 132, anode; 141, first signal output mirror; 142, second signal output mirror; 150, cavity length adjustment device; 160, jitter bias frequency driving device;

[0030] 221. First optical path edge; 222. Second optical path edge; 223. Third optical path edge; 224. Fourth optical path edge; 225. Fifth optical path edge; 226. Sixth optical path edge; 227. Seventh optical path edge; 228. Eighth optical path edge; 229. Normal; 230. Vertical plane; 310. Microcrystalline glass cavity; 331. Cathode; 332. Anode; 341. First output mirror; 342. Second output mirror; 343. DC phototube; 344. Light-combining prism; 345. AC phototube; 350. Spherical reflector; 360. Machine shaking wheel; 370. Reflector. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figure 3 , Figure 6 , Figure 8 as well as Fig. 9 As shown, the present invention provides a quantum noise compression laser gyroscope, which includes a microcrystalline glass cavity 310, a mechanical shaking wheel 360, an output mirror and a reflector 370, and a cavity length adjustment mechanism 350; wherein, a mirror mounting surface and a cavity length adjustment mechanism mounting surface are provided on the side of the microcrystalline glass cavity 310, the reflector 370 and the output mirror are respectively arranged on the mirror mounting surface, and the cavity length adjustment mechanism 350 is arranged on the cavity length adjustment mechanism mounting surface; the microcrystalline glass cavity 310 is supported by the shaking wheel mounting hole On the machine shaking wheel (360); the inner cavity of the microcrystalline glass cavity 310 is a resonant cavity, and a multi-layer annular optical path is formed in the resonant cavity. The three-dimensional structure is arranged in the resonant cavity, that is, the multi-layer annular optical path is a three-dimensional multi-layer annular optical path; the microcrystalline glass cavity 310 is supported on the machine shaking wheel 360, and the machine shaking wheel 360 is arranged in the microcrystalline glass cavity 310, and drives the cavity 310 to shake back and forth to generate a positive and negative alternating shaking bias frequency; the annular optical path is provided with an optical path hole in the circumference of the shaking wheel mounting hole for forming an optical path. The quantum noise compression laser gyroscope provided by the present invention can effectively increase the photon carrying capacity by designing a multi-layer annular optical path, realize the expansion of the number of photons in the cavity from the longitudinal and transverse directions, and can compress the quantum noise limit of the gyroscope without increasing the side length, while improving the accuracy of the laser gyroscope, reducing the volume and weight as much as possible.

[0037] Preferably, in combination with the above scheme, Figure 3 , Figure 6 as well as Fig. 9As shown, the annular light path is a two-layer annular light path, a three-layer annular light path or more layers; the light paths of the multi-layer annular light paths are connected through a reflector 370 to form a closed annular light path.

[0038] Preferably, in combination with the above solution, each layer of the annular light path is preferably a regular polygon or a triangle.

[0039] Preferably, in combination with the above scheme, Figure 3 , Figure 6 as well as Fig. 9 As shown, the shape of each layer of annular light paths is the same, and the size of each layer of annular light paths is the same. Furthermore, the distance d between two adjacent layers of annular light paths is equal.

[0040] Preferably, in combination with the above scheme, Figure 3 , Figure 6 as well as Fig. 9 As shown, the normal incident angle and the emergent angle of two adjacent layers of annular light paths are symmetrical; a mirror mounting surface is provided at the intersection of two adjacent layers of annular light paths, and the mirror mounting surface is perpendicular to the normal 229 of the two adjacent layers of annular light paths.

[0041] Preferably, in combination with the above scheme, Figure 3 , Figure 6 as well as Fig. 9 As shown, each layer of the multi-layer annular optical path is an optical path plane formed by connecting multiple optical path edges, and two adjacent layers of optical path planes are parallel to each other. Furthermore, the endpoints of the optical path edges on the same side of two adjacent layers of optical path planes are connected by cross optical edges, thereby forming a closed annular optical path; specifically, as Figure 3 and Figure 6 As shown, the intersecting lightpath refers to the third lightpath 223 and the seventh lightpath 227 .

[0042] Preferably, in combination with the above scheme, Figure 3 , Figure 6 as well as Fig. 9 As shown, the lengths L1 of the light path sides of the light path planes of adjacent layers of annular light paths are equal, and the lengths L2 of the connecting light path sides of adjacent layers are equal (specifically, it can be understood that the lengths of the light path sides on the light path planes of the same layer of annular light paths are all equal), so the distance between the light path planes of two adjacent layers of annular light paths is d; further, L2 satisfies: Further, in combination with the above solution, Figure 3 and Figure 6 As shown, the length L1 of the optical path edge is preferably designed to be 70 mm, and the distance d between two adjacent layers of optical path planes is preferably designed to be 22 mm. Such designed parameters enable the laser gyroscope to ensure better accuracy under better volume.

[0043] Preferably, in combination with the above scheme, Figure 3 , Figure 6as well as Fig. 9 As shown, the light path edges on the same side of the two adjacent light path planes completely overlap on the same plane, that is, the light path edges on the same side of the two adjacent light path planes completely overlap, for specific reference: the second light path edge 222 and the sixth light path edge 226 completely overlap on the same plane; the eighth light path edge 228 and the fourth light path edge 224 completely overlap on the same plane. Further, the adjacent light path edges are symmetrical about their normals, such as the cross light path edge and the light path edge connected to it are symmetrical about the normal 229. Further, the reflector mounting surface is located at the vertical plane 230 of the normal 229, and the reflector 370 is selected as a total reflection reflector. Due to total reflection, the loss is extremely small under the coating technology conditions.

[0044] Specifically, in a laser gyro, the frequency uncertainty of the operating laser is:

[0045]

[0046] Where τ is the photon lifetime, N p is the number of photons in the cavity, and the relationship between the photon lifetime and the cavity loss Γ is:

[0047]

[0048] Where L is the cavity length, c is the speed of light, and the number of photons in the cavity N is p It can be expressed as:

[0049]

[0050] Among them, P int is the intracavity power, and h is Planck's constant; therefore, it can be concluded that:

[0051]

[0052] It can be seen from formula (4) that by increasing the cavity length L and the cavity power P int Therefore, the quantum noise compression laser gyro of the present invention adopts the method of increasing the cavity length by spatial compounding to realize the compression of quantum noise, which not only increases the cavity length, but also realizes the increase of the power in the cavity by expanding the Gaussian beam. The schematic diagram of the closed optical path is shown in FIG. Figure 3 The calculation of the optical path is explained below in combination with specific geometric dimensions.

[0053] Preferably, in combination with the above scheme, Figure 3 and Figure 6As shown, the multi-layer annular optical path is a double-layer quadrilateral folded optical path, which includes a first layer of optical path plane and a second layer of optical path plane, and the first layer of optical path plane and the second layer of optical path plane are parallel to each other. Specifically, the first layer of optical path plane includes a first optical path edge 221, a second optical path edge 222 and an eighth optical path edge 228, and the second layer of optical path plane includes a fourth optical path edge 224, a fifth optical path edge 225 and a sixth optical path edge 226; wherein, the first optical path edge 221, the second optical path edge 222 and the eighth optical path edge 228 are located in the same plane (i.e., the first layer of optical path plane); the fourth optical path edge 224, the fifth optical path edge 225 and the sixth optical path edge 226 are located in the same plane (i.e., the second layer of optical path plane). Specifically, the optical path is connected as follows: one end of the first optical path edge 221 is connected to one end of the second optical path edge 222, the other end of the first optical path edge 221 is connected to one end of the eighth optical path edge 228, one end of the fifth optical path edge 225 is connected to one end of the fourth optical path edge 224, the other end of the fifth optical path edge 225 is connected to one end of the sixth optical path edge 226, the other end of the eighth optical path edge 228 is connected to the other end of the sixth optical path edge 226 via the seventh optical path edge 227, and the other end of the fourth optical path edge 224 is connected to the other end of the second optical path edge 222 via the third optical path edge 223, presenting a square annular optical path.

[0054] Preferably, in combination with the above scheme, Figure 3 and Figure 6 As shown, the first optical path 221 and the fifth optical path 225 completely overlap on the same plane, the second optical path 222 and the sixth optical path 226 completely overlap on the same plane, and the eighth optical path 228 and the fourth optical path 224 completely overlap on the same plane. Further, the angles between the fourth optical path 224 and the third optical path 223 and the second optical path 222 are 90° respectively; the angles between the seventh optical path 227 and the eighth optical path 228 and the sixth optical path 226 are 90° respectively, and the normal 229 of the fourth optical path 224 and the third optical path 223 is symmetrical about the normal 229, so the angles between the normal 229 and the fourth optical path 224 and the third optical path 223 are both 45°. Furthermore, the intersection of the fourth optical path edge 224 and the third optical path edge 223 is a plane 230 perpendicular to the normal line 229, which is also the installation position of the plane reflector. The reflector installation surfaces at the intersections of other optical paths can be obtained by similar calculation.

[0055] Preferably, in combination with the above scheme, Figure 3 and Figure 6As shown, the optical path edges on the same side of two adjacent optical path planes completely overlap on the same plane (specifically, refer to the vertical plane in the vertical direction); the intersection of two connected optical path edges in each optical path plane is designed as a semi-transparent and semi-reflective mounting surface. Specifically, the semi-transparent and semi-reflective mounting surface includes a first semi-transparent and semi-reflective mounting surface and a second semi-transparent and semi-reflective mounting surface. The first semi-transparent and semi-reflective mounting surface is provided with a first output mirror 341 and a spherical reflector 350, and the second semi-transparent and semi-reflective mounting surface is provided with a second output mirror 342 and a spherical reflector 350, which are used to adjust the optical path length; the first output mirror 341 is provided with a DC photoelectric tube 343, which is used to output AC and DC light intensity signals; the second output mirror 342 is provided with a light combining prism 344, and the light combining prism 344 is equipped with an AC photoelectric tube 345, which detects the AC light intensity signal, and the DC and AC light intensity signals are connected to the laser gyro control circuit as part of the laser gyro control loop. The cavity length adjustment mechanism composed of the spherical reflector 350 and the grabber is mainly used to adjust the cavity length so that the laser gyro works in the best working mode. The total cavity length of the quantum noise compression laser gyro designed by the present invention is 566.76 mm, which is about twice the original one. The increase in cavity length reduces the frequency uncertainty (refer to the frequency uncertainty in the above formula 4). This structure adds four reflectors 370. The added lenses will bring additional losses, but these four lenses are not used for output and are full-reflection mirrors, so the loss is extremely small. The main sources of loss of the quantum noise compression laser gyro designed by the present invention are the aperture and the output mirror. The additional loss caused by the four full-reflection mirrors will not exceed 10% of the original one, and the impact brought by it can be basically ignored.

[0056] The quantum noise compression laser gyro designed by the present invention has a structure that not only increases the cavity length, but also increases the Gaussian beam spot radius and the intra-cavity power by extending the optical path. In the elliptical coordinate system, assuming that the semi-major axis of the Gaussian beam is a, along the x-axis, and the semi-minor axis is b, along the y-axis, the spot intensity distribution can be expressed as:

[0057]

[0058] Where I0 is the spatial power density at the center of the elliptical beam.

[0059] Integrating the intensity distribution on the elliptical cross section gives the power P in the cavity: int :

[0060]

[0061] From the Gaussian integral table we can get:

[0062]

[0063] Substituting into formula (6) we can get:

[0064]

[0065] It can be seen from equation (8) that when the central optical power density I0 is constant, the larger the spot radius, the greater the intracavity power, and the frequency uncertainty in equation (4) will also decrease.

[0066] like Figure 4 The distribution diagrams of the Gaussian beam spot radius in the cavity of the quantum noise enhanced laser gyroscope (optical path side length is 70mm, double-layer optical path spacing is 22mm) and the traditional laser gyroscope (optical path side length is 70mm) are shown respectively, and the two have the same side length. Figure 4 Points A, B, and C correspond to Figure 2 and Figure 3 Points A, B, and C of the optical path shown, points B and C correspond to the positions of the spherical mirrors of the two gyroscopes. Figure 5 The ratio of the spot radius of the overlapping part of the optical paths of the two gyroscopes in the meridian plane and the sagittal plane is shown. Figure 5 It can be seen that the spot radius of the quantum noise compression laser gyroscope is about 1.2 times the spot radius of the traditional laser gyroscope at the corresponding position in both the meridian plane and the sagittal plane. Therefore, the intracavity power corresponding to equation (8) is about 1.44 times the original one. It can be seen that the quantum noise compression laser gyroscope not only increases the length of the optical path, but also increases the optical power in the cross section through beam expansion, which brings double benefits, and thus can improve the ultimate accuracy of the gyroscope.

[0067] Depend on Figures 2 to 5 As shown, compared with the existing traditional laser gyroscope with a single-layer annular optical path, the quantum noise compression laser gyroscope proposed in the present invention can increase the optical path length exponentially with only a small increase in the thickness and weight of the laser gyroscope. At the same time, the light flux will also increase, thereby improving the ultimate accuracy of the laser gyroscope and expanding the application of the laser gyroscope in volume-constrained scenarios.

[0068] In addition to the quantum noise compression laser gyroscope with quadrilateral double-layer folded optical path described in the above embodiment, the optical path of the quantum noise compression laser gyroscope proposed in the present invention can be a double-layer, three-layer or multi-layer structure; the shape of the optical path of each layer can be a regular polygon or an arbitrary polygon, such as a triangle; the shapes and sizes of the polygons of each layer of the optical path can be the same or different; the distances between the layers of the multi-layer optical path can be equal or unequal; the optical path of the quantum compression laser gyroscope of the present invention can also be any combination of the above technical features, Figure 7 The above-mentioned technical features are shown as a combination of some of the above-mentioned technical features, but the present invention is not limited to Figure 7 The form shown.

[0069] Depend on Figure 7As shown in a, the optical path of the quantum compression laser gyroscope of the present invention can be an n-layer optical path in addition to the double-layer optical path in the above embodiment, as shown in the figure, respectively, the first layer, the second layer, ..., the nth layer; each layer is a quadrilateral optical path, and the side length of the i-th layer optical path is respectively express, They can be equal or unequal; the length of the optical path connection section between the first and second layers is represented by A1, the length of the optical path connection section between the second and third layers is represented by A2, and so on, the length of the optical path connection section between the nth layer and the first layer is represented by An; the spacing distance between the first and second layers is represented by H1, the spacing distance between the second and third layers is represented by H2, and so on, the distances Hi (i=1,2…,n) between the layers can be equal or unequal. By Figure 7 As shown in FIG. 2 b, the shapes of the optical paths of the various layers of the quantum compression laser gyroscope of the present invention may be the same or different. For example, the shape of the optical path of the nth layer in the figure is a triangle.

[0070] Preferably, in combination with the above scheme, Figure 3 and Figure 6 As shown, a shaking wheel mounting hole is provided at the center of the microcrystalline glass cavity 310, and a mechanical shaking wheel 360 is arranged in the shaking wheel mounting hole; piezoelectric ceramics are mounted on the spokes of the mechanical shaking wheel 360, and the mechanical shaking wheel 360 is driven by the deformation of the piezoelectric ceramics to drive the microcrystalline glass cavity 310 to shake back and forth to generate positive and negative alternating shaking bias frequencies. Figure 6 As shown, with only a small increase in the thickness of the laser gyroscope, the optical path length is twice that of a single-layer ring laser gyroscope.

[0071] Preferably, in combination with the above scheme, Figure 3 and Figure 6 As shown, the laser gyroscope also includes a cathode 331 and an anode 332; the cathode 331 is arranged on one side of the microcrystalline glass cavity 310, and is used to connect to the negative high voltage end of the laser gyroscope high voltage ignition circuit; the anode 332 is arranged on the other side of the microcrystalline glass cavity 310, and is used to connect to the ground end of the laser gyroscope high voltage ignition circuit.

[0072] The quantum noise compression laser gyroscope proposed in the present invention can increase the optical path length exponentially while only slightly increasing the thickness and weight of the laser gyroscope, and can also increase the light flux at the same time, thereby improving the ultimate accuracy of the laser gyroscope.

[0073] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above-mentioned technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A quantum noise compression laser gyroscope, characterized in that: The laser gyroscope comprises a microcrystalline glass cavity (310), a cavity length adjustment mechanism (350), a machine shaking wheel (360), an output mirror and a reflector (370); a mirror mounting surface and a cavity length adjustment mechanism mounting surface are provided on the side of the microcrystalline glass cavity (310); the reflector (370) and the output mirror are respectively arranged on the mirror mounting surface; the cavity length adjustment mechanism (350) is arranged on the cavity length adjustment mechanism mounting surface; the microcrystalline glass cavity (310) is supported on the machine shaking wheel (360) through a shaking wheel mounting hole; the inner cavity of the microcrystalline glass cavity (310) is a resonant cavity, and a multi-layer annular optical path is formed in the resonant cavity.

2. The quantum noise compression laser gyro according to claim 1, characterized in that: The annular light path is a two-layer annular light path or a three-layer annular light path; the light paths of the multi-layer annular light paths are connected through the reflector (370) to form a closed annular light path.

3. The quantum noise compression laser gyro according to claim 1, characterized in that: The annular light path of each layer is a regular polygon or a triangle.

4. The quantum noise compression laser gyro according to claim 1, characterized in that: The shape of each layer of the annular light path is the same, and the size of each layer of the annular light path is the same.

5. The quantum noise compression laser gyro according to claim 1, characterized in that: The distance d between the annular light paths of two adjacent layers is equal.

6. The quantum noise compression laser gyro according to claim 1, characterized in that: The normal incident angle and the exit angle of the annular light paths of two adjacent layers are symmetrical; a mirror mounting surface is provided at the intersection of the annular light paths of two adjacent layers, and the mirror mounting surface is perpendicular to the normal (229) of the annular light paths of the two adjacent layers.

7. The quantum noise compression laser gyro according to claim 1, characterized in that: The reflector (370) is a plane reflector, and the output mirror is a semi-transparent and semi-reflective mirror, and the output mirror comprises a first output mirror (341) and a second output mirror (342); the cavity length adjustment mechanism mounting surface is a spherical reflector mounting surface, and the mirror mounting surface and the spherical reflector mounting surface are respectively arranged at the intersection of two adjacent layers of the annular light paths, and the mirror mounting surface comprises a first semi-transparent and semi-reflective mounting surface and a second semi-transparent and semi-reflective mounting surface; the first output mirror (341) is arranged on the first semi-transparent and semi-reflective mounting surface, and the second output mirror (342) is arranged on the second semi-transparent and semi-reflective mounting surface; a DC photoelectric tube (343) is arranged on the first output mirror (341), and a light-combining prism (344) and an AC photoelectric tube (345) are arranged on the second output mirror (342); the cavity length adjustment mechanism (350) comprises a spherical reflector, and the spherical reflector is arranged on the spherical reflector mounting surface, and is used to adjust the cavity length of the microcrystalline glass cavity (310).

8. The quantum noise compression laser gyro according to claim 1, characterized in that: The lengths L1 of the light path sides of the annular light path planes of the same layer are equal; the lengths L2 of the light path sides of the light path planes of another adjacent layer are equal; The distance between two adjacent optical path planes is d; L2 satisfies:

9. The quantum noise compression laser gyro according to claim 1, characterized in that: A shaking wheel mounting hole is provided at the center of the microcrystalline glass cavity (310), and the mechanical shaking wheel (360) is arranged in the shaking wheel mounting hole; piezoelectric ceramics are mounted on the spokes of the mechanical shaking wheel (360), and the mechanical shaking wheel (360) is driven by the deformation of the piezoelectric ceramics to drive the microcrystalline glass cavity (310) to shake back and forth to generate a positive and negative alternating shaking bias frequency.

10. The quantum noise compression laser gyro according to claim 1, characterized in that: The laser gyroscope further comprises a cathode (331) and an anode (332); the cathode (331) is arranged on one side surface of the microcrystalline glass cavity (310) and is used to connect to the negative high voltage end of the high voltage ignition circuit of the laser gyroscope; the anode (332) is arranged on the other side surface of the microcrystalline glass cavity (310) and is used to connect to the ground end of the high voltage ignition circuit of the laser gyroscope.

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