Weak measurement enhanced chip scale microcavity gyroscope method and system

Abstract

The invention provides a method and a system for realizing a weak measurement enhanced chip-level microcavity gyroscope. The method comprises the following steps of: 1, providing a coherent state input by a system by using a single-frequency laser; 2, the output of the single-frequency laser is switched between a first path and a second path through an optical switch, the laser beam is transmitted to the first path in the first half part of the period, and the laser beam is transmitted to the second path in the second half part of the period; 3, the light transmitted along the first path and the second path respectively passes through an optical resonant cavity to sense the rotation angular speed, and a weak value amplification effect is achieved by setting front and back selection states; and step 4, weak measurement enhanced output results transmitted along the first path and the second path are respectively received by a photoelectric detector, and the value of the rotation angular velocity is demodulated according to the obtained output results. According to the invention, the optical microcavity is used as a sensing unit of the gyroscope, the sensing performance of the integrated optical gyroscope is greatly enhanced through a weak measurement technology, and the whole set of system can realize chip-level integration.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of quantum optics and optical gyroscope technology, in particular, to a weak measurement enhanced chip-level microcavity gyroscope method and system. BACKGROUND

[0002] Gyroscope is a sensing system for high-precision angular velocity measurement, and has become a key component of the inertial navigation system in modern ships, aircraft, satellites, submarines and spacecraft. Optical gyroscope is based on Sagnac effect, which demodulates angular velocity through the phase shift between two counter-propagating lights in an optical loop, and fiber-optic gyroscope is one of the most mature high-precision gyroscope types. However, there is a trade-off between performance and size of optical gyroscope, and new methods need to be explored to enhance the sensing performance of miniaturized gyroscope under the increasing demand for integrated optical gyroscope.

[0003] Weak measurement technology realizes abnormal amplification of the measured parameter by setting close-to-orthogonal pre-selection state and post-selection state, and has significant results in the field of quantum precision measurement such as detecting small physical effects. The weak value amplification realized by weak measurement technology can achieve precision and sensitivity beyond classical methods, and can effectively suppress technical noise. The abnormal weak value outside the characteristic value spectrum or with complex value shows the great potential of new quantum technology in the field of sensing.

[0004] Patent document CN115307619A discloses an optical gyroscope based on microcavity structure for detecting sensitivity-adjustable optical gyroscope and a method for measuring angular velocity, which comprises a straight waveguide, a micro-ring resonant cavity, a rotating platform, a spatial periodic micro-electrode, a coupling area, and an adjustable voltage source. The straight waveguide and the micro-ring resonant cavity are in a coupled state to form a coupling area. The rotating platform is used to drive the micro-ring resonant cavity to rotate. The incident light enters the micro-ring resonant cavity through the coupling area via the straight waveguide. The spatial periodic micro-electrode is arranged in the non-coupling arc region of the micro-ring resonant cavity and acts on the micro-ring resonant cavity to apply a periodic distribution electric field to the electrode corresponding area to form a periodic refractive index distribution and generate an equivalent Bragg grating with controllable modulation depth. The adjustable voltage source is used to adjust the voltage of the spatial periodic micro-electrode to adjust the refractive index of the electrode corresponding area. However, this patent cannot completely solve the existing technical problems and cannot meet the needs of the present application.

[0005] In view of the deficiencies in the existing optical gyroscope technology, the present application designs a weak measurement enhanced integrated microcavity gyroscope method and system. Compared with the prior art, the optical microcavity is used as the sensitive unit of the gyroscope, and the sensing performance of the integrated optical gyroscope is greatly enhanced by the weak measurement technology. The whole system can be integrated on a chip. SUMMARY

[0006] Aiming at the defects in the prior art, the present application aims to provide a weak measurement enhanced chip-level microcavity gyroscope implementation method and system.

[0007] The weak measurement enhanced chip-level microcavity gyroscope implementation method provided by the present application comprises:

[0008] Step 1: providing a coherent state |a> inputted by a microcavity gyroscope through a single-frequency laser, the frequency of the single-frequency laser being the resonance frequency of an optical resonant cavity in a stationary state;

[0009] Step 2: switching the output of the single-frequency laser between a first path and a second path through an optical switch, transmitting the laser beam to the first path in the first half of a period and transmitting the laser beam to the second path in the second half of the period;

[0010] Step 3: the light transmitted along the first and second paths respectively senses the rotation angular velocity through the optical resonant cavity, and the weak value amplification effect is realized through setting the pre- and post-selection states;

[0011] Step 4: the weak measurement enhanced output results transmitted along the first and second paths are respectively received by photodetectors, and the value of the rotation angular velocity is demodulated according to the obtained output results.

[0012] Preferably, the step 3 comprises:

[0013] The first path: the inputted light is modulated into a pre-selection state after passing through a directional coupler and a phase modulator Wherein, |u> represents the light transmitted along the upper arm path, i.e. the upper light; |d> represents the light transmitted along the lower arm path, i.e. the lower light; is the current phase;

[0014] In the weak coupling process, the light after pre-selection is divided into upper light and lower light, the light inputted into the optical resonant cavity along the clockwise direction propagates through the coupling device to sense the phase θ loaded on the optical resonant cavity due to rotation; the light inputted into the optical resonant cavity along the counterclockwise direction propagates through the coupling device to sense the phase -θ loaded on the optical resonant cavity due to rotation; the process corresponds to the evolution process Wherein, e is a natural index, i is an imaginary unit,

[0015] In the post-selection process, the upper light and the lower light are selected through a directional coupler, and the post-selection state is At this time, the output light intensity I1 is detected through a photodetector.

[0016] Preferably, the step 3 comprises:

[0017] Second path: the input light is modulated into a pre-selection state after passing through a directional coupler

[0018] In the weak coupling process, the pre-selected light is divided into up-path light and down-path light, the up-path light input into the optical resonant cavity propagates in the counterclockwise direction, and the phase-θ caused by the rotation of the optical resonant cavity is perceived through the coupling device; the down-path light input into the optical resonant cavity propagates in the counterclockwise direction, and the phase-θ caused by the rotation of the optical resonant cavity is perceived through the coupling device; this process corresponds to the evolution process

[0019] In the post-selection process, the up-path light and the down-path light are selected through a phase modulator and a directional coupler, and the post-selection state is At this time, the output light intensity I2 is detected by a photodetector.

[0020] Preferably, the step 4 comprises:

[0021] When the optical resonant cavity rotates, the light intensity of the coupling device changes, the input and output normalized light intensity of the coupling device is T, and when the weak measurement condition θImAw<<1 is met, the output light intensity of the photodetector detecting the first path is I1=I0T[1+2θImAw], and the output light intensity of the photodetector detecting the second path is I2=I0T[1-2θImAw]; wherein, I0 is the input light intensity;

[0022] The intensity contrast of the same period is selected As an observation index, the estimation of θ is realized.

[0023] Preferably, when θ<<1, θ and the rotation angular velocity Ω are in a linear relationship: θ=kΩ, and k is a linear factor.

[0024] The weak measurement enhanced chip-level microcavity gyroscope implementation system provided by the application comprises:

[0025] Module M1: providing a coherent state |α> input into the microcavity gyroscope through a single-frequency laser, and the frequency of the single-frequency laser is the resonant frequency of the optical resonant cavity in a stationary state;

[0026] Module M2: the output of the single-frequency laser is switched between the first path and the second path through an optical switch, and the laser beam is transmitted to the first path in the first half of the period and is transmitted to the second path in the second half of the period;

[0027] Module M3: the light transmitted along the first path and the second path respectively perceives the rotation angular velocity through the optical resonant cavity, and the weak value amplification effect is realized by setting the pre-selection state and the post-selection state;

[0028] Module M4: The weak measurement enhancement output results transmitted along the first and second paths are received by photodetectors, and the value of the rotational angular velocity is demodulated based on the obtained output results.

[0029] Preferably, the module M3 includes:

[0030] First path: The input light is modulated into a preselected state after passing through the directional coupler and phase modulator. Where |u> represents the light transmitted along the upper arm path, i.e., the upper path light; |d> represents the light transmitted along the lower arm path, i.e., the lower path light; The current phase;

[0031] In the weak coupling process, the pre-selected light is divided into upper and lower beams. The upper beam enters the optical resonator in a clockwise direction and senses the phase θ of the optical resonator due to rotation via the coupling device. The lower beam enters the optical resonator in a counter-clockwise direction and senses the phase -θ of the optical resonator due to rotation via the coupling device. This process corresponds to the evolution process. Where e is the natural exponent and i is the imaginary unit.

[0032] During the post-selection process, the upper and lower beams are post-selected via a directional coupler, and the post-selection state is... At this time, the output light intensity I1 is detected by a photodetector.

[0033] Preferably, the module M3 includes:

[0034] Second path: The input light is modulated into a pre-selective state after passing through the directional coupler.

[0035] In the weak coupling process, the pre-selected light is divided into upper and lower beams. The upper beam, which enters the optical resonator, propagates counterclockwise and senses the phase -θ of the optical resonator due to rotation via the coupling device. Similarly, the lower beam, which enters the optical resonator, propagates counterclockwise and senses the phase θ of the optical resonator due to rotation via the coupling device. This process corresponds to the evolution process.

[0036] During the post-selection process, the upper and lower beams are post-selected via a phase modulator and a direction coupler, and the post-selection state is: At this time, the output light intensity I2 is detected by a photodetector.

[0037] Preferably, the module M4 includes:

[0038] When the optical resonant cavity rotates, the light intensity of the coupling device changes. The normalized input and output light intensities of the coupling device are T. When the weak measurement condition θImAw << 1 is met, the output light intensity of the photodetector detecting the first path is I1 = I0T[1 + 2θImAw], and the output light intensity of the photodetector detecting the second path is I2 = I0T[1 - 2θImAw]. I0 is the input light intensity;

[0039] Intensity contrast of the same period As an observation indicator, it enables the estimation of θ.

[0040] Preferably, when θ << 1, θ has a linear relationship with the rotational angular velocity Ω: θ = kΩ, where k is a linear factor.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] (1) From the perspective of overall technology, the present invention uses an optical microcavity as the sensitive unit of the gyroscope and greatly enhances the sensing performance of the integrated optical gyroscope through weak measurement technology. The whole system can be integrated at the chip level. The present invention has a simple structure, is easy to use, is easy to integrate at the chip level, and improves the sensing performance of the integrated optical gyroscope.

[0043] (2) From the perspective of application scope, the present invention has a wide range of applications, enabling optical gyroscopes to be used in a variety of working scenarios. It has outstanding advantages in size, weight, power consumption, operability, scalability and robustness, and can operate in harsh environments.

[0044] (3) From the perspective of technological advancement, this invention expands the application scenarios based on weak measurement theory and promotes the progress of integrated quantum sensing technology. Attached Figure Description

[0045] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0046] Figure 1 This is a schematic diagram of an embodiment of the chip-level microcavity gyroscope system with weak measurement enhancement according to the present invention;

[0047] Figure 2 A schematic diagram of a weak measurement enhancement integrated microcavity gyroscope for light propagation along path A;

[0048] Figure 3 A schematic diagram of a weak measurement enhancement integrated microcavity gyroscope for light propagation along path B;

[0049] Figure 4 This is a schematic diagram of an embodiment of the chip-level microcavity gyroscope system with weak measurement enhancement according to the present invention.

[0050] As shown in the figure:

[0051] 1. Single-frequency laser, 2. Optical switch, 3. First directional coupler, 4. Second directional coupler, 5. First phase modulator, 6. First coupling device, 7. Second coupling device, 8. Optical resonant cavity, 9. First photodetector, 10. Second photodetector, 11. Second phase modulator, 12. Third phase modulator, 13. Fourth phase modulator, 13. Path A, Path B. Detailed Implementation

[0052] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0053] Example 1

[0054] This invention provides a method for implementing a chip-level microcavity gyroscope with weak measurement enhancement, such as... Figure 1 As shown, it includes: a single-frequency laser 1, an optical switch 2, a first directional coupler 3, a second directional coupler 4, a first phase modulator 5, a first coupling device 6, a second coupling device 7, an optical resonant cavity 8, a first photodetector 9, a second photodetector 10, a second phase modulator 11, a third phase modulator 12, and a fourth phase modulator 13.

[0055] This method includes the following steps:

[0056] The light output from a single-frequency laser 1 with a frequency of ω0, which is the resonant frequency of the optical resonant cavity, propagates along two paths, A and B, respectively, via an optical switch 2. The light transmitted along both paths undergoes a weak amplification process.

[0057] Path A: The input light is modulated into a pre-selective state after passing through the first directional coupler 3 and the first phase modulator 5. |u> represents light transmitted along the upper arm path, i.e., upper path light, and |d> represents light transmitted along the lower arm path, i.e., lower path light.

[0058] During the weak coupling process, the pre-selected light is divided into upper and lower paths. The upper path light enters the optical resonator 8 in a clockwise direction and senses the phase θ loaded on the optical resonator 8 due to rotation via the first coupling device 6. The lower path light enters the optical resonator 8 in a counterclockwise direction and senses the phase -θ loaded on the optical resonator 8 due to rotation via the second coupling device 7. This process corresponds to the evolution process. Where e is the natural exponent and i is the imaginary unit.

[0059] During the post-selection process, the upper and lower beams are post-selected via the second directional coupler 4, and the post-selection state is... At this time, the output light intensity I1 is detected by the second photodetector 10.

[0060] Path B: The input light is modulated into a pre-selective state after passing through the second directional coupler 4. |u> represents light transmitted along the upper arm path, i.e., upper path light, and |d> represents light transmitted along the lower arm path, i.e., lower path light.

[0061] In the weak coupling process, the pre-selected light is divided into upper and lower paths. The upper path light, input to the optical resonator 8, propagates counterclockwise and is coupled to the second coupling device 6, which senses the phase -θ applied to the optical resonator 8 due to rotation. The lower path light, input to the optical resonator 8, propagates counterclockwise and is coupled to the second coupling device 7, which senses the phase θ applied to the optical resonator 8 due to rotation. This process corresponds to the evolution process. Where e is the natural exponent and i is the imaginary unit.

[0062] During the post-selection process, the upper and lower path lights are post-selected via the first phase modulator 5 and the first directional coupler 3, and the post-selection state is: At this time, the output light intensity I2 is detected by the first photodetector 9.

[0063] Preferably, the first coupling device 6 and the second coupling device 7 are coupling devices with identical parameters. When the optical resonant cavity 8 rotates, the light intensity of the first coupling device 6 and the second coupling device 7 will change. The normalized input and output light intensity of the first coupling device 6 and the second coupling device 7 is T. When the weak measurement condition θImAw << 1 is satisfied, where The output light intensity of the second photodetector 10 detecting path A is I1 = I0T[1 + 2θImAw], and the output light intensity of the first photodetector 9 detecting path B is I1 = I0T[1 - 2θImAw]; intensity contrast of the same period is selected. As an observation indicator, it enables the estimation of θ.

[0064] Since the Sagnac effect is a small physical effect (θ << 1), θ has a linear relationship with the rotational angular velocity Ω: θ = kΩ, where k is a linear factor.

[0065] like Figure 4 As shown, a second phase modulator 11, a third phase modulator 12, and a fourth phase modulator 13 are added to fine-tune the selection state before and after.

[0066] Example 2

[0067] This invention provides a chip-level microcavity gyroscope implementation system with weak measurement enhancement, comprising the following modules:

[0068] Module M1: Single-frequency laser 1 provides the input light source;

[0069] Module M2: Switches between paths A and B via optical switch 2, transmitting the laser beam to path A in the first half of the cycle and to path B in the second half of the cycle.

[0070] Module M3: The light transmitted along paths A and B passes through optical resonant cavity 8 to sense the rotational angular velocity, and the weak amplification effect is achieved by setting the front and rear selection states;

[0071] Module M4: The weak measurement enhancement output results transmitted along paths A and B are received by the first photodetector 9 and the second photodetector 10, respectively.

[0072] In module M1:

[0073] A single-frequency laser 1 is used to provide the coherent state |α> of the system input, and the frequency of the laser is the resonant frequency of the optical resonant cavity 8 in the static state.

[0074] In module M2:

[0075] Optical switch 2 is used to switch between paths A and B, transmitting the laser beam to path A in the first half of the cycle and to path B in the second half of the cycle.

[0076] To combat noise caused by non-ideal factors, this invention recommends using an optical switch with a high switching frequency. However, this is not a necessary option for weak measurement enhancement schemes. Alternatively, other types of beam-splitting devices can be used instead of optical switches; that is, the weak measurement enhancement scheme provided by this invention can still maintain its effectiveness even when the switching frequency is 0.

[0077] In module M3:

[0078] The first directional coupler 3, the second directional coupler 4, and the first phase modulator 5 together constitute an approximately orthogonal front-to-back selection state. The first phase modulator 5 modulates the bias phases of the upper and lower arms to adjust the front-to-back selection state, making it approximately orthogonal.

[0079] like Figure 4 As shown, a second phase modulator 11, a third phase modulator 12, and a fourth phase modulator 13 are added to fine-tune the selection state before and after.

[0080] The first coupling device 6 and the second coupling device 7 are coupled to the optical resonant cavity 8. During rotation, the upper and lower coupling devices are respectively loaded with the phase ±θ (Ω) caused by the rotation. The optical resonant cavity 8 is used to sense the rotational angular velocity Ω.

[0081] To achieve chip-level integration, the optical resonant cavity 8 is designed as a ring resonant cavity. This design is beneficial for chip-level integration, and the first coupling device 6 and the second coupling device 7 can be implemented by directional couplers. Optionally, depending on specific application requirements or technical conditions, the optical resonant cavity can also adopt other forms of whispering-gallery mode microcavities to adapt to different integration environments or performance requirements. The first coupling device 6 and the second coupling device 7 can also be implemented by tapered optical fibers, prism optical fibers, lens optical fibers, etc.

[0082] In module M4:

[0083] After detecting the weak light intensity I1 in path A and the weak light intensity I2 in path B using the first photodetector 9 and the second photodetector 10 respectively, the output light intensity is selected.

[0084] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0085] Those skilled in the art will understand that, in addition to implementing the system, apparatus, and their modules provided by this invention in purely computer-readable program code, the same program can be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system, apparatus, and their modules provided by this invention can be considered a hardware component, and the modules included therein for implementing various programs can also be considered structures within the hardware component; alternatively, modules for implementing various functions can be considered both software programs implementing the method and structures within the hardware component.

[0086] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A method for implementing a chip-level microcavity gyroscope with weak measurement enhancement, characterized in that, include: Step 1: Provide the coherent state |α> of the microcavity gyroscope input through a single-frequency laser, where the frequency of the single-frequency laser is the resonant frequency of the optical resonant cavity in the static state; Step 2: The output of the single-frequency laser is switched between the first path and the second path by an optical switch. The laser beam is transmitted to the first path in the first half of the cycle and to the second path in the second half of the cycle. Step 3: The light transmitted along the first and second paths passes through the optical resonant cavity to sense the rotational angular velocity, and the weak amplification effect is achieved by setting the front and rear selection states; Step 4: The weak measurement enhancement output results transmitted along the first and second paths are received by photodetectors respectively, and the value of rotational angular velocity is demodulated based on the obtained output results.

2. The method for implementing a chip-level microcavity gyroscope with weak measurement enhancement according to claim 1, characterized in that, Step 3 includes: First path: The input light is modulated into a preselected state after passing through the directional coupler and phase modulator. Where |u> represents the light transmitted along the upper arm path, i.e., the upper path light; |d> represents the light transmitted along the lower arm path, i.e., the lower path light; The current phase; In the weak coupling process, the pre-selected light is divided into upper and lower beams. The upper beam enters the optical resonator in a clockwise direction and senses the phase θ of the optical resonator due to rotation via the coupling device. The lower beam enters the optical resonator in a counter-clockwise direction and senses the phase -θ of the optical resonator due to rotation via the coupling device. This process corresponds to the evolution process. Where e is the natural exponent and i is the imaginary unit. During the post-selection process, the upper and lower beams are post-selected via a directional coupler, and the post-selection state is... At this time, the output light intensity I1 is detected by a photodetector.

3. The method for implementing a chip-level microcavity gyroscope with weak measurement enhancement according to claim 2, characterized in that, Step 3 includes: Second path: The input light is modulated into a pre-selective state after passing through the directional coupler. In the weak coupling process, the pre-selected light is divided into upper and lower beams. The upper beam, which enters the optical resonator, propagates counterclockwise and senses the phase -θ of the optical resonator due to rotation via the coupling device. Similarly, the lower beam, which enters the optical resonator, propagates counterclockwise and senses the phase θ of the optical resonator due to rotation via the coupling device. This process corresponds to the evolution process. During the post-selection process, the upper and lower beams are post-selected via a phase modulator and a direction coupler, and the post-selection state is: At this time, the output light intensity I2 is detected by a photodetector.

4. The method for implementing a chip-level microcavity gyroscope with weak measurement enhancement according to claim 3, characterized in that, Step 4 includes: When the optical resonant cavity rotates, the light intensity of the coupling device changes. The normalized input and output light intensities of the coupling device are T. When the weak measurement condition θImAw << 1 is met, the output light intensity of the photodetector detecting the first path is I1 = I0T[1 + 2θImAw], and the output light intensity of the photodetector detecting the second path is I2 = I0T[1 - 2θImAw]. I0 is the input light intensity; Intensity contrast of the same period As an observation indicator, it enables the estimation of θ.

5. The method for implementing a chip-level microcavity gyroscope with weak measurement enhancement according to claim 4, characterized in that, When θ << 1, θ has a linear relationship with the rotational angular velocity Ω: θ = kΩ, where k is a linear factor.

6. A chip-level microcavity gyroscope implementation system with weak measurement enhancement, characterized in that, include: Module M1: Provides the coherent state |α> of the microcavity gyroscope input via a single-frequency laser, where the frequency of the single-frequency laser is the resonant frequency of the optical resonant cavity in the static state; Module M2: The output of the single-frequency laser is switched between the first path and the second path by an optical switch. The laser beam is transmitted to the first path in the first half of the cycle and to the second path in the second half of the cycle. Module M3: The light transmitted along the first and second paths passes through the optical resonant cavity to sense the rotational angular velocity, and the weak amplification effect is achieved by setting the front and rear selection states; Module M4: The weak measurement enhancement output results transmitted along the first and second paths are received by photodetectors, and the value of the rotational angular velocity is demodulated based on the obtained output results.

7. The chip-level microcavity gyroscope implementation system with weak measurement enhancement according to claim 6, characterized in that, The module M3 includes: First path: The input light is modulated into a preselected state after passing through the directional coupler and phase modulator. Where |u> represents the light transmitted along the upper arm path, i.e., the upper path light; |d> represents the light transmitted along the lower arm path, i.e., the lower path light; The current phase; In the weak coupling process, the pre-selected light is divided into upper and lower beams. The upper beam enters the optical resonator in a clockwise direction and senses the phase θ of the optical resonator due to rotation via the coupling device. The lower beam enters the optical resonator in a counter-clockwise direction and senses the phase -θ of the optical resonator due to rotation via the coupling device. This process corresponds to the evolution process. Where e is the natural exponent and i is the imaginary unit. During the post-selection process, the upper and lower beams are post-selected via a directional coupler, and the post-selection state is... At this time, the output light intensity I1 is detected by a photodetector.

8. The chip-level microcavity gyroscope implementation system with weak measurement enhancement according to claim 7, characterized in that, The module M3 includes: Second path: The input light is modulated into a pre-selective state after passing through the directional coupler. In the weak coupling process, the pre-selected light is divided into upper and lower beams. The upper beam, which enters the optical resonator, propagates counterclockwise and senses the phase -θ of the optical resonator due to rotation via the coupling device. Similarly, the lower beam, which enters the optical resonator, propagates counterclockwise and senses the phase θ of the optical resonator due to rotation via the coupling device. This process corresponds to the evolution process. During the post-selection process, the upper and lower beams are post-selected via a phase modulator and a direction coupler, and the post-selection state is: At this time, the output light intensity I2 is detected by a photodetector.

9. The chip-level microcavity gyroscope implementation system with weak measurement enhancement according to claim 8, characterized in that, The module M4 includes: When the optical resonant cavity rotates, the light intensity of the coupling device changes. The normalized input and output light intensities of the coupling device are T. When the weak measurement condition θImAw << 1 is met, the output light intensity of the photodetector detecting the first path is I1 = I0T[1 + 2θImAw], and the output light intensity of the photodetector detecting the second path is I2 = I0T[1 - 2θImAw]. I0 is the input light intensity; Intensity contrast of the same period As an observation indicator, it enables the estimation of θ.

10. The chip-level microcavity gyroscope implementation system with weak measurement enhancement according to claim 9, characterized in that, When θ << 1, θ has a linear relationship with the rotational angular velocity Ω: θ = kΩ, where k is a linear factor.

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