Method for adjusting an nv color center excitation laser, medium, control device and measuring apparatus

Abstract

This invention discloses a method, medium, control device, and measuring equipment for adjusting NV center-excited lasers, relating to the field of quantum measurement technology. The method is used in an NV center-excited laser calibration system. The system includes a laser for emitting a target laser, at least two adjusting lenses for expanding the target laser beam, and a focusing lens for focusing the expanded target laser beam to generate a laser spot. The method includes: adjusting the adjusting lenses according to the laser spot to match the laser incident surface of the target diamond; and adjusting the adjusting lenses according to the fluorescence intensity generated by the laser spot excitation of the NV centers in the target diamond to reduce the laser spot area and adjust its position on the laser incident surface, ensuring the fluorescence intensity meets the target excitation requirements. This enables rapid positioning of the NV centers, enhances laser concentration, improves laser intensity and utilization efficiency, thereby improving the accuracy and sensitivity of the measuring equipment.

Description

Technical Field

[0001] This invention relates to the field of quantum measurement technology, and more particularly to a method, medium, control device, and measuring equipment for adjusting NV color center excited laser. Background Technology

[0002] In experiments using laser excitation to induce fluorescence in NV (Nitrogen-Vacancy) color centers in diamond, the laser spot is typically expanded to cover the entire incident surface of the diamond. While this method avoids the operational complexity of repeatedly adjusting the laser incident angle, the large spot area significantly reduces the proportion of laser energy actually acting on the NV color centers, resulting in poor fluorescence excitation efficiency. When fluorescence excitation fails to meet the relevant process requirements, the laser power needs to be increased to improve the efficiency. However, increasing the laser power introduces additional challenges, such as requiring a replacement laser source if the laser power emitted by the laser diode is insufficient, potentially requiring more space.

[0003] In practical applications, diamonds are typically small in size, and the NV centers within them may exist singly or in clusters, with a random distribution. Currently, the commonly used experimental NV center concentration is approximately 13 ppm (parts per million), meaning that the proportion of NV centers per unit volume is extremely low. Therefore, under large spot illumination conditions, only a very small portion of the laser energy (approximately 13 parts per million) is effectively used to excite the NV centers, while the vast majority of the laser energy does not participate in the fluorescence excitation process, resulting in significant energy waste.

[0004] Against this backdrop, how to improve the effective utilization rate of laser energy, enhance the fluorescence effect of NV color centers, and reduce the laser power of the laser source without repeatedly adjusting the laser incident angle has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustment method, medium, control device, and measuring equipment for NV color center excitation laser, so as to achieve rapid positioning of NV color center location, enhance laser concentration, improve laser intensity and effective utilization, increase fluorescence brightness, thereby improving the accuracy and sensitivity of the measuring equipment.

[0006] In a first aspect, embodiments of the present invention propose a method for adjusting an NV center-excited laser, used in an NV center-excited laser tuning system. The system includes a laser, at least two adjusting lenses, and a focusing lens arranged sequentially. The laser emits a target laser, the at least two adjusting lenses expand the target laser beam, and the focusing lens focuses the expanded target laser beam to generate a laser spot. The method includes: adjusting the adjusting lenses according to the laser spot to match the shape and size of the laser spot with the shape and size of the target diamond laser incident surface; and adjusting the adjusting lenses according to the fluorescence intensity generated by the NV centers in the target diamond excited by the laser spot to reduce the laser spot area and adjust the position of the laser spot illuminating the target diamond laser incident surface, and to ensure that the fluorescence intensity meets the target excitation requirements.

[0007] In some embodiments, the method further includes: after the fluorescence brightness meets the target excitation requirements, reducing the laser power intensity of the laser until the fluorescence brightness is reduced to a preset brightness threshold.

[0008] In some embodiments, the number of adjustment lenses is two, namely a first adjustment lens and a second adjustment lens; the adjustment of the adjustment lenses according to the laser spot includes: detecting the laser spot by a laser detection device and obtaining a detection result, wherein the distance between the detection surface of the laser detection device and the focusing lens is the same as the distance between the laser incident surface and the focusing lens; determining a target adjustment strategy based on the detection result, the shape and size of the laser incident surface; adjusting the parameters b and α of the first adjustment lens and the parameters c and β of the second adjustment lens according to the target adjustment strategy, wherein b and c represent the distances between the first adjustment lens, the second adjustment lens and the focusing lens, respectively, and α and β represent the angles between the positioning axis of the first adjustment lens, the positioning axis of the second adjustment lens and a preset direction, respectively.

[0009] In some embodiments, the shape and size of the laser spot matching the shape and size of the laser incident surface means that the shape of the laser spot is the same as the shape of the laser incident surface, and the size of the laser spot is less than or equal to the size of the laser incident surface and greater than or equal to half the size of the laser incident surface.

[0010] In some embodiments, adjusting the fluorescence brightness of the adjustment lens includes: adjusting the adjustment lens according to a first adjustment strategy to make the laser spot proportionally reduced with respect to the center point of the laser incident surface, until the fluorescence brightness no longer increases or meets the target excitation requirements.

[0011] In some embodiments, the laser spot includes multiple edges; adjusting the fluorescence brightness of the adjusting lens further includes: for each edge of the laser spot, adjusting the adjusting lens according to a second adjustment strategy corresponding to the edge, so that the edge moves in a direction that increases the laser spot size until the fluorescence brightness no longer decreases, thus obtaining a first edge; if the fluorescence brightness continues to decrease during the process of moving the edge in a direction that increases the laser spot size, then adjusting the adjusting lens according to a third adjustment strategy corresponding to the edge, so that the edge moves in a direction that decreases the laser spot size until the fluorescence brightness no longer increases, thus obtaining a second edge.

[0012] In some embodiments, adjusting the fluorescence brightness of the adjusting lens further includes: if the number of the second edges is 0, then for each first edge, adjusting the adjusting lens according to a third adjustment strategy corresponding to the first edge, so that the first edge moves in the direction of reducing the laser spot until it can no longer move, to obtain the strongest fluorescence brightness and the corresponding moving position, and adjusting the adjusting lens according to a second adjustment strategy corresponding to the first edge until the first edge is reset; determining the first edge and moving position corresponding to the maximum value of the strongest fluorescence brightness to obtain the target edge and the target position; and adjusting the adjusting lens according to the third adjustment strategy corresponding to the target edge until the target edge moves to the target position.

[0013] In some embodiments, adjusting the fluorescence brightness of the adjusting lens further includes: if the number of second edges is non-zero, for each second edge, adjusting the adjusting lens according to a second adjustment strategy corresponding to the second edge, so that the second edge moves in the direction of increasing the laser spot until the fluorescence brightness no longer decreases; for each first edge, adjusting the adjusting lens according to a third adjustment strategy corresponding to the first edge, so that the first edge moves in the direction of decreasing the laser spot until it can no longer move, obtaining the strongest fluorescence brightness and the corresponding moving position, and adjusting the adjusting lens according to the second adjustment strategy corresponding to the first edge until the first edge resets; for each second edge, adjusting the adjusting lens according to the third adjustment strategy corresponding to the second edge, so that the second edge moves in the direction of decreasing the laser spot until it can no longer move, obtaining the strongest fluorescence brightness and the corresponding moving position, and adjusting the adjusting lens according to the second adjustment strategy corresponding to the second edge until the second edge resets; determining the edge and moving position corresponding to the maximum value of the strongest fluorescence brightness to obtain a target edge and a target position; adjusting the adjusting lens according to the third adjustment strategy corresponding to the target edge until the target edge moves to the target position.

[0014] Secondly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method for adjusting NV color center-excited lasers described in the first aspect is implemented.

[0015] Thirdly, embodiments of the present invention provide a control device, including a memory, a processor, and a computer program stored in the memory. When the computer program is executed by the processor, it implements the adjustment method for NV color center excitation laser described in the first aspect.

[0016] Fourthly, embodiments of the present invention provide a measuring device, comprising: an NV color center excitation laser debugging system, a diamond, and the control device described in the third aspect above; wherein, the NV color center excitation laser debugging system comprises a laser, at least two adjusting lenses, and a focusing lens arranged sequentially, the laser being used to emit a target laser, the at least two adjusting lenses being used to expand the target laser beam, and the focusing lens being used to focus the expanded target laser beam to generate a laser spot.

[0017] The present invention discloses an adjustment method, medium, control device, and measuring equipment for NV center-excited lasers. Based on an NV center-excited laser adjustment system, the laser spot is adjusted. The system includes a laser, at least two adjustment lenses, and a focusing lens arranged sequentially. The laser emits a target laser beam, the at least two adjustment lenses expand the target laser beam, and the focusing lens focuses the expanded target laser beam to generate a laser spot. During laser spot adjustment, the adjustment lenses are first adjusted according to the laser spot to match the shape and size of the laser spot with the shape and size of the target diamond laser incident surface. Then, the adjustment lenses are adjusted according to the fluorescence intensity generated by the laser spot excitation of the NV centers in the target diamond to reduce the laser spot area and adjust the position of the laser spot irradiating the target diamond laser incident surface, ensuring the fluorescence intensity meets the target excitation requirements. This allows for rapid positioning of the NV centers, enhances laser concentration, improves laser intensity and utilization, increases fluorescence intensity, and thus improves the accuracy and sensitivity of the measuring equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an NV color center excited laser debugging system according to an embodiment of the present invention;

[0019] Figure 2 This is a front view of the structure of an NV color center-excited laser debugging system according to another embodiment of the present invention;

[0020] Figure 3 This is a structural side view of an NV color center-excited laser debugging system according to another embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of an adjustable lens according to an embodiment of the present invention;

[0022] Figure 5 This is a flowchart of the NV color center excitation laser debugging method according to an embodiment of the present invention;

[0023] Figure 6 This is a flowchart of the method for adjusting the NV color center-excited laser according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of a proportionally reduced laser spot, as an example of the present invention;

[0025] Figure 8 This is a schematic diagram of the laser spot when edge A is obtained, according to an example of the present invention;

[0026] Figure 9 This is a schematic diagram of the laser spot when obtaining edge B, as an example of the present invention;

[0027] Figure 10This is a schematic diagram of a laser spot when the number of edge B is 0, according to an example of the present invention;

[0028] Figure 11(a) is a schematic diagram of the laser spot when the number of edge B is 1 in an example of the present invention;

[0029] Figure 11(b) is a schematic diagram of the laser spot when the number of edge B is 2 in an example of the present invention;

[0030] Figure 11(c) is a schematic diagram of the laser spot when the number of edge B is 2 in another example of the present invention;

[0031] Figure 11(d) is a schematic diagram of the laser spot when the number of edge B is 3 in an example of the present invention;

[0032] Figure 12 This is a structural block diagram of a control device according to an embodiment of the present invention;

[0033] Figure 13 This is a structural block diagram of the measuring device according to an embodiment of the present invention. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] The following description, with reference to the accompanying drawings, describes an NV color center excitation laser adjustment system and method, as well as an adjustment method, medium, control device, and measuring equipment for the NV color center excitation laser.

[0036] Figure 1 This is a schematic diagram of the structure of an NV color center excited laser debugging system according to an embodiment of the present invention.

[0037] like Figure 1 As shown, the NV color center excitation laser debugging system 100 includes: a laser 1, a lens assembly 2, and a laser detection device 3.

[0038] See Figure 1 Laser 1 is used to emit target laser; lens assembly 2 is set in the optical path of target laser to expand and focus the target laser to generate laser spot (to excite NV color centers to generate fluorescence); laser detection device 3 is used to detect laser spot and obtain detection results to adjust lens assembly so that laser spot meets target requirements.

[0039] The target requirements may include at least one of the following: the laser spot size is the target size, the shape is the target shape, the intensity reaches the target intensity, and the uniformity reaches the target uniformity. The target requirements can be determined based on the NV color center excitation laser requirements; for example, the laser spot may be required to be rectangular with a size of [missing information]. It can cover a single NV color center or a cluster of NV color centers in an NV color center detector, where m is the length of the rectangle and n is the width of the rectangle.

[0040] Specifically, when using the NV color center-excited laser calibration system 100 for laser calibration, the laser spot can be detected by the laser detection device 3 to obtain detection results (such as the size, shape, intensity, and uniformity of the laser spot). Afterwards, the laser spot can be manually or via a host computer to determine whether it meets the target requirements based on the detection results. For example, whether the shape of the laser spot is rectangular, and whether its size is within the preset size range. The preset size range can be determined based on the size of the target diamond laser incident surface on the target device. If the target requirements are not met, the lens assembly 2 can be adjusted manually or automatically, including horizontal and vertical beam expansion adjustment, and focusing adjustment after beam expansion, until the target requirements are met. The adjustment strategy (including the mapping relationship between the laser spot and each adjustment parameter) can be obtained based on experience or through prior experimentation. Thus, a laser spot with uniform intensity, regular shape, high stability, and accurate illumination of the NV color center cluster or a single color center can be obtained.

[0041] In some examples, the laser detection device 3 employs a CCD (Charge-Coupled Device) camera or a beam quality analyzer.

[0042] Choosing a charge-coupled device (CCD) camera or beam quality analyzer as the laser detection device 3 allows for the detection of parameters such as the size, shape, and energy distribution of the laser spot, providing precise input for the adjustment of the lens assembly 2. For example, a CCD camera uses a two-dimensional image sensor to capture the laser spot distribution and converts it into a high-resolution image, facilitating real-time monitoring of laser spot changes; a beam quality analyzer can evaluate the focusing capability of the laser spot through mathematical models (such as M² factor calculation) and identify irregularities or divergence problems in the laser spot. Based on the detection results, the lens assembly 2 can be adjusted, such as by changing the focal length or beam expansion angle, to optimize the laser spot quality and ensure that it achieves the expected accuracy and stability in application, thus meeting the target requirements.

[0043] In some examples, laser 1 is a laser diode used to generate target laser light with a wavelength of 532 nm or 520 nm.

[0044] Choosing a laser diode as the excitation source, compared to solid-state lasers (such as DPSS (Diode-Pumped Solid-State) lasers) or gas lasers, can directly output target lasers with wavelengths of 532nm or 520nm, achieving precise wavelength matching, high efficiency, small size, easy miniaturization, and low cost.

[0045] In some embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 As shown, the lens assembly 2 includes a focusing lens 21 and at least two adjusting lenses. Figure 1 , Figure 2 , Figure 3 (Taking two adjustment lenses as an example, namely the first adjustment lens 221 and the second adjustment lens 222), wherein at least two adjustment lenses are arranged in the optical path of the target laser and located between the laser 1 and the focusing lens 21, for expanding the target laser beam in at least two directions; the focusing lens 21 is arranged in the optical path of the target laser and is used to focus the expanded target laser beam to generate a laser spot.

[0046] The focusing lens 21 is located in the optical path of the target laser, and the distance between it and the laser 1 can be determined by the preset space of the adapter device. For example, a preset distance can be set first, and the focusing lens 21 can be moved later according to the focusing of the laser spot to determine the specific distance between the focusing lens 21 and the laser 1.

[0047] For example, such as Figure 2 , Figure 3 , Figure 4 As shown, the first adjusting lens 221 is a plano-convex cylindrical lens with its cylindrical direction along the first direction, used to expand the target laser beam in the second direction, which is perpendicular to the first direction; the second adjusting lens 222 is a plano-convex cylindrical lens with its cylindrical direction along the third direction, used to expand the target laser beam in the fourth direction, which is perpendicular to the third direction.

[0048] See Figure 2 , Figure 3 The first direction is horizontal, the second direction is vertical; the third direction is vertical, and the fourth direction is horizontal.

[0049] In some examples, the first adjusting lens 221 is provided with a first adjusting mechanism for moving and rotating the first adjusting lens 221, so that the first adjusting lens 221 moves in the optical path of the target laser and rotates around the optical path of the target laser and / or the positioning axis of the first adjusting lens 221; the second adjusting lens 222 is provided with a second adjusting mechanism for moving and rotating the second adjusting lens 222, so that the second adjusting lens 222 moves in the optical path of the target laser and rotates around the optical path of the target laser and / or the cylindrical central axis of the second adjusting lens 222.

[0050] See Figure 4 Both the first adjusting lens 221 and the second adjusting lens 222 are plano-convex cylindrical lenses, each comprising a plane and a cylinder. The plane faces the incident direction of the target laser and is perpendicular to the incident direction; the curvature of the cylinder can be adjusted according to actual requirements. After the target laser is incident on the plano-convex cylindrical lens, it can exit through the cylinder, achieving beam expansion. The beam expansion direction is determined according to the position of the plano-convex cylindrical lens.

[0051] See Figure 1 , Figure 2 , Figure 3 The first adjusting lens 221 and the second adjusting lens 222 are both located on the line connecting the laser 1 and the focusing lens 21, and the distance between the first adjusting lens 221, the second adjusting lens 222 and the focusing lens 21 is adjusted by corresponding adjusting mechanisms. The positioning axes of the first adjusting lens 221 and the second adjusting lens 222 (see...) Figure 4 The angle between the laser beam and the vertical direction (i.e., the perpendicular direction) allows for beam amplification of the target laser beam both vertically and horizontally. For example, see... Figure 4 The plano-convex cylindrical lens can rotate around its axis (e.g., 360°) and around its positioning axis (within a small angle range, such as -10° to 10°), thereby controlling the laser beam expansion direction (i.e., the laser divergence direction) and the offset of the target laser beam. Furthermore, the plano-convex cylindrical lens can also be moved along the laser direction (i.e., the optical path of the target laser) to control the degree of laser beam expansion by approaching or moving away from the laser 1 or the focusing lens 21.

[0052] Therefore, by rotating and moving the first adjusting lens 221 and the second adjusting lens 222, the beam expansion direction, beam expansion degree and beam expansion offset degree of the irregular laser spot are controlled, and then the laser spot is focused by the focusing lens 21 to obtain the desired laser spot, so that the size, shape and uniformity of the laser spot can be controlled.

[0053] Optionally, the number of adjustment lenses can also be three or more, and their functions are the same as those of the first adjustment lens 221 and the second adjustment lens 222. The curved surfaces (such as the curvature of a cylindrical surface) can be different from each other according to actual needs, so as to facilitate different beam expansion degrees of the target laser in various directions.

[0054] In some embodiments, the focusing lens 21 is provided with a third adjustment mechanism for adjusting the movement of the focusing lens in the optical path of the target laser.

[0055] See Figure 1 , Figure 2 , Figure 3 The size of the laser spot can be changed by adjusting the horizontal movement of the focusing lens 21 through the third adjustment mechanism.

[0056] In some embodiments of the present invention, such as Figure 2 , Figure 3 As shown, the NV color center excited laser debugging system 100 also includes an optical isolator 4; wherein, the optical isolator 4 is disposed between the laser 1 and the lens assembly 2, and is used to eliminate the optical path echo of the target laser and achieve passive isolation.

[0057] For example, the optical isolator 4 includes a polarizing beam splitter prism, a quarter-zero order waveplate, and a reflector; the polarizing beam splitter prism is disposed in the optical path of the target laser to transmit P-polarized light and reflect S-polarized light in the target laser; the quarter-zero order waveplate is disposed in the P-polarized light transmission path of the polarizing beam splitter prism, and the optical axis of the quarter-zero order waveplate forms a 45° angle with the polarization direction of the incident P-polarized light; the reflector is disposed after the quarter-zero order waveplate.

[0058] In this process, the P-polarized component of the target laser is converted into circularly polarized light after passing through a polarizing beam splitter and a quarter-zero-order waveplate. This circularly polarized light is then reflected by the mirror and passed back through the quarter-zero-order waveplate, becoming S-polarized light. This S-polarized light returns to the polarizing beam splitter and is reflected off the optical path of the target laser, thus achieving isolation, eliminating optical path echoes, and realizing passive isolation. This ensures the purity and stability of the target laser used for beam expansion and focusing, and purifies the environment of the subsequent processing optical path.

[0059] In some embodiments of the present invention, such as Figure 2 , Figure 3 As shown, the NV color center excited laser adjustment system 100 also includes a half-wave plate 5; wherein, the half-wave plate 5 is disposed in the optical path of the target laser and is located between the optical isolator 4 and the lens assembly 2, and is used to adjust the polarization direction of the target laser.

[0060] Specifically, because the target laser used to excite NV centers (typically 532nm green light) is linearly polarized, the NV centers have a specific orientation in the diamond crystal (along the four axes of the diamond). <111> The polarization direction of the target laser and the symmetry axis (axial direction) of the NV color center affect the absorption efficiency of the laser. By adding an external rotary displacement stage and tooling along the optical axis and finely rotating the half-wave plate, the polarization direction of the target laser can be continuously changed so that the angle between its projection in the diamond plane and the axial direction of the NV color center is optimal (usually parallel), thereby maximizing the fluorescence emission intensity of the NV color center.

[0061] Of course, in some examples, the half-wave plate 5 can be placed directly after the laser 1 without setting the optical isolator 4.

[0062] Optionally, the angle of the half-wave plate can be dynamically adjusted by combining the detection feedback from a CCD camera or beam quality analyzer to further achieve high-precision laser spot adjustment.

[0063] In some embodiments of the present invention, the NV color center excited laser tuning system 100 further includes an optical power attenuator. The optical power attenuator is disposed between the lens assembly 2 and the laser detection device 3, and is located in the optical path of the target laser.

[0064] By setting an optical power attenuator, the power of the target laser can be attenuated before it reaches the laser detection device 3, so as to prevent the laser power from being too high and causing damage to the laser detection device 3.

[0065] Figure 5 This is a flowchart of the NV color center excitation laser debugging method according to an embodiment of the present invention.

[0066] In embodiments of the present invention, the NV color center-excited laser debugging method is used in the NV color center-excited laser debugging system described in the above embodiments. For example... Figure 5 As shown, the NV color center excitation laser tuning method includes:

[0067] S11, Obtain the detection results of the laser spot by the laser detection device.

[0068] S12, if the detection results determine that the laser spot does not meet the target requirements, the lens assembly is adjusted until the laser spot meets the target requirements.

[0069] The target requirements may include at least one of the following: the size of the laser spot is the target size, the shape is the target shape, the intensity reaches the target intensity, and the uniformity reaches the target uniformity.

[0070] Specifically, by adding an auxiliary device, namely the laser detection device 3, which is a CCD camera or a beam quality analyzer, the size, shape and uniformity of the light spot are observed.

[0071] The aforementioned NV color center-excited laser calibration system adjusts the lens assembly to generate a laser spot. This laser spot is then projected onto a laser detection device, which inspects the spot for parameters such as size, shape, intensity, and uniformity to determine if it meets the target requirements. If not, the rotation and movement of the adjusting lens and the movement of the focusing lens within the lens assembly can be adjusted in real-time to control the real-time changes in the laser spot.

[0072] For example, whether it is a single NV center or an NV center cluster, the shape of the laser spot can be adjusted to just cover the cutting surface shape of the laser input of the diamond according to the different outer surfaces of the diamond, so that the NV center or NV center cluster can be fully covered without adjusting the laser path.

[0073] Once the laser spot is tested and found to be qualified (good uniformity and high utilization rate), the laser testing device can be removed, and the entire system can be installed in the target device to focus the qualified laser spot onto the diamond, thereby better exciting the NV color centers in the diamond.

[0074] In summary, the NV color center excitation laser tuning system and method of the present invention can achieve the following beneficial effects:

[0075] 1) Improved excitation efficiency: By adjusting the lens assembly, a high-quality laser spot can be obtained, thereby increasing the laser power density. This allows the NV color center to be effectively polarized to the target ground state (m_s=0) in a shorter time, and to emit fluorescence with higher intensity and stronger stability during spin state readout;

[0076] 2) Reduced power consumption and interference: Under the condition of achieving the same fluorescence counting rate, a high-quality laser spot allows for the use of lower laser power. This reduces power consumption and helps to mitigate the heating and photobleaching effects caused by the laser, which is especially crucial for the measurement of temperature-sensitive physical quantities (such as magnetic fields and temperature).

[0077] 3) Improved spectral line measurement accuracy: When performing optical detection magnetic resonance spectroscopy measurements, a stable laser spot can maintain the overall stability of the fluorescence signal baseline, thereby more accurately locating the position and depth of the resonance valley, and further supporting high-precision calculation of physical quantities such as magnetic fields;

[0078] 4) Improved signal-to-noise ratio: High-quality laser spot can effectively enhance the target NV color center signal while suppressing background noise, thereby obtaining an extremely high signal-to-noise ratio;

[0079] 5) Improving fluorescence excitation efficiency and reducing the laser power of the laser source enables the system of this application to be applicable to a wider range of scenarios, including low-laser-power scenarios, avoiding damage to related components or equipment by high-power lasers and the signal-to-noise ratio problem caused by high-power lasers. Moreover, low-power laser sources are easier to obtain, and their space occupation is greatly reduced.

[0080] Figure 6 This is a flowchart of the method for adjusting the NV color center-excited laser according to an embodiment of the present invention.

[0081] In an embodiment of the present invention, the adjustment method for the NV color center excitation laser is used in the NV color center excitation laser adjustment system 100, see [link to documentation]. Figures 1-4 The system 100 includes a laser 1, at least two adjustment lenses (such as a first adjustment lens 221 and a second adjustment lens 222) arranged in sequence, and a focusing lens 21. The laser 1 is used to emit a target laser, the at least two adjustment lenses are used to expand the target laser beam, and the focusing lens 21 is used to focus the expanded target laser beam to generate a laser spot. See the NV color center excited laser debugging system 100 in the above embodiment for details.

[0082] like Figure 6 As shown, the adjustment methods for NV color center excitation lasers include:

[0083] S21, Adjust the adjusting lens according to the laser spot so that the shape and size of the laser spot match the shape and size of the target diamond laser incident surface.

[0084] S22, the adjustment lens is adjusted according to the fluorescence brightness generated by the laser spot excitation of the NV color center in the target diamond, so as to reduce the laser spot area and adjust the position of the laser spot irradiating the laser incident surface of the target diamond, and make the fluorescence brightness meet the target excitation requirements.

[0085] In this embodiment, both the target diamond and the NV center excitation laser adjustment system (excluding the laser detection device) can be structures of the measuring equipment. The adjustment of the NV center excitation laser can be divided into two stages: the first stage involves installing the NV center excitation laser adjustment system before the measuring equipment to adjust the laser spot. This stage aims to obtain a laser spot whose shape and size match the shape and size of the laser incident surface of the target diamond. The second stage involves installing the NV center excitation laser adjustment system 100 before the measuring equipment to adjust the laser spot area and irradiation position. This stage aims to obtain a laser spot whose fluorescence brightness meets the target excitation requirements (e.g., fluorescence brightness is greater than or equal to a preset brightness threshold, and the fluorescence brightness is adjusted to the maximum achievable brightness). In the second stage, reducing the laser spot area can enhance the laser irradiation intensity and density, improving laser utilization. Adjusting the position of the laser spot irradiating the laser incident surface of the target diamond can locate the region with the highest NV center density on the target diamond.

[0086] Therefore, through two-stage adjustment, the obtained laser spot can quickly locate the position of NV color centers (single or clustered), and can enhance the concentration of the laser, improve the laser intensity and effective utilization, increase the fluorescence brightness, thereby improving the accuracy and sensitivity of the measuring equipment.

[0087] In some embodiments of the present invention, the method for adjusting the NV color center excitation laser further includes: after the fluorescence brightness meets the target excitation requirements (such as adjusting the fluorescence brightness to the maximum achievable brightness), reducing the laser power intensity of the laser until the fluorescence brightness is reduced to a preset brightness threshold.

[0088] Reducing the laser power intensity can be achieved by decreasing the laser's drive current or by replacing it with a laser with a lower laser power intensity.

[0089] By reducing the laser power intensity of the laser, the NV color center excited laser debugging system of this application can be applied to a wider range of scenarios, including low laser power scenarios. This avoids damage to related components or equipment caused by high-power lasers, as well as signal-to-noise ratio problems caused by high-power lasers. Moreover, the laser source for low-power lasers is relatively easy to obtain, and its space occupation is greatly reduced.

[0090] In some embodiments of the present invention, see Figure 2 , Figure 3 There are two adjusting lenses, namely the first adjusting lens and the second adjusting lens.

[0091] In this embodiment, adjusting the adjustment lens according to the laser spot includes: detecting the laser spot using a laser detection device to obtain a detection result, wherein the distance between the detection surface of the laser detection device and the focusing lens is the same as the distance between the laser incident surface and the focusing lens; determining a target adjustment strategy based on the detection result, the shape and size of the laser incident surface; and adjusting the parameters b and α of the first adjustment lens and the parameters c and β of the second adjustment lens according to the target adjustment strategy, wherein b and c represent the distances between the first adjustment lens, the second adjustment lens and the focusing lens, respectively, and α and β represent the angles between the positioning axis of the first adjustment lens, the positioning axis of the second adjustment lens and the preset direction, respectively.

[0092] For example, matching the shape and size of the laser spot with the shape and size of the laser incident surface means that the shape of the laser spot is the same as the shape of the laser incident surface, and the size of the laser spot is less than or equal to the size of the laser incident surface and greater than or equal to half the size of the laser incident surface.

[0093] Specifically, before installing the NV color center-excited laser calibration system onto the measuring equipment, the first and second adjustment lenses can be adjusted through the following steps to obtain a laser spot whose shape and size match the shape and size of the target diamond laser incident surface:

[0094] Step 1: Obtain the shape and size of the target diamond laser incident surface on the measuring equipment;

[0095] Step 2: Obtain the distance 'a' between the focusing lens and the target diamond laser incident surface when the NV color center excitation laser debugging system is installed on the measuring equipment;

[0096] Step 3: Detect the laser spot focused by the focusing lens using an external auxiliary device, such as a laser detection device, wherein the distance between the laser detection device and the focusing lens is a;

[0097] Step 4: Adjust the first and second adjustment lenses, such as by controlling the two adjustment lenses to rotate around the laser direction as the axis of rotation and adjusting the distance between the two adjustment lenses and the focusing lens (or laser), so as to adjust the shape and size of the laser spot and match it with the shape and size of the target diamond laser incident surface;

[0098] During the adjustment process, the distances b and c between the two adjustment lenses and the focusing lens, as well as the angles α and β between the positioning axes of the two adjustment lenses and the vertical upward direction, are acquired in real time.

[0099] Step 5: Construct a coordinate system for the laser spot on the laser detection device, with the center of the laser spot as the origin o.

[0100] Step 6: Observe the laser spot on the laser detection device, and control the changes in the X and Y positions of the laser spot in the coordinate system by adjusting the parameters b, c, α, and β;

[0101] Here, X and Y can be the sets of abscissas and ordinates that characterize the position of the laser spot, respectively. Taking a rectangular laser spot as an example, X contains the abscissas of the four corners of the rectangle, and Y contains the ordinates of the four corners of the rectangle.

[0102] For example, a relationship model between X, Y and b, c, α, β can be pre-established. This model can then be imported into a control device. When needed, the model can be invoked to adjust the b, c, α, β parameters of the two adjusting lenses, thereby controlling the changes in the X and Y of the laser spot. The control device can control the rotation and movement of the two adjusting lenses.

[0103] Step 7: Using the control device, adjust parameters b, c, α, and β until the shape and size of the laser spot match the shape and size of the laser incident surface in Step 1, including having the same shape, the same size, or slightly smaller (the size of the laser spot is not less than half the size of the laser incident surface). At this point, remove the laser detection device, install the NV color center excitation laser debugging system onto the measuring equipment, and ensure that the installation position of the focusing lens is the same as in Step 2, i.e., the distance between the focusing lens and the laser incident surface of the target diamond on the measuring equipment is 'a'.

[0104] In some embodiments of the present invention, adjusting the fluorescence brightness of the adjusting lens includes: adjusting the adjusting lens according to a first adjustment strategy so that the laser spot is proportionally reduced with the center point of the laser incident surface as a reference point until the fluorescence brightness no longer increases or meets the target excitation requirements.

[0105] Specifically, the first adjustment strategy can be obtained based on the aforementioned relational model. The control device controls the adjustment lens according to the first adjustment strategy to adjust the laser spot, causing the laser spot to shrink proportionally with the origin o of the coordinate system as the reference point. During this process, the fluorescence brightness will gradually increase. When the fluorescence brightness no longer increases (including no change or a decrease), the control device operation is stopped. At this time, the shape of the laser spot is as follows: Figure 7 As shown, the large rectangle represents the laser incident surface of the target diamond, and the small rectangle represents the reduced laser spot. Along the perimeter of the laser spot, there will inevitably be a partial loss of the NV color center on one side. Alternatively, the control device can be stopped when the fluorescence brightness meets the target excitation requirements (such as reaching a preset brightness threshold), at which point no further adjustments are needed.

[0106] In some embodiments of the present invention, the laser spot includes multiple edges; adjusting the fluorescence brightness of the adjusting lens further includes: for each edge of the laser spot, adjusting the adjusting lens according to a second adjustment strategy corresponding to the edge, so that the edge moves in the direction of increasing the laser spot until the fluorescence brightness no longer decreases, thus obtaining a first edge; if the fluorescence brightness continues to decrease during the process of moving the edge in the direction of increasing the laser spot, adjusting the adjusting lens according to a third adjustment strategy corresponding to the edge, so that the edge moves in the direction of decreasing the laser spot until the fluorescence brightness no longer increases, thus obtaining a second edge.

[0107] Specifically, if the control device is stopped when the fluorescence brightness no longer increases (including no change or a decrease), the adjustment lens can be continued to further enhance the fluorescence excitation efficiency. Figure 7 Taking the laser spot shown as an example, the laser spot includes four edges. For each edge, the control device controls the adjustment lens according to the second adjustment strategy (which can be obtained from the relational model) to move that edge in the direction of increasing the laser spot size. For example, the right edge moves towards the positive X-axis, the left edge moves towards the negative X-axis, the upper edge moves towards the positive Y-axis, and the lower edge moves towards the negative Y-axis. During the movement, the fluorescence brightness is observed. If the fluorescence brightness no longer decreases (i.e., increases or remains unchanged), the movement is stopped, and the corresponding edge of the laser spot is stopped at this position, which is recorded as the first edge (e.g., ...). Figure 8 As shown in the figure, there is at least one edge A.

[0108] If the fluorescence brightness continues to decrease, it indicates that adjusting the corresponding edge cannot produce a laser spot that meets the target excitation requirements. In this case, adjust the adjusting lens according to the third adjustment strategy corresponding to that edge to move the edge in the direction of reducing the laser spot size. Alternatively, the edge can be first restored to its original position (i.e., the adjusting lens can be directly restored to the parameters corresponding to that original position), and then the adjusting lens can be adjusted according to the third adjustment strategy corresponding to that edge until the fluorescence brightness no longer increases, thus obtaining the second edge (e.g., ...). Figure 9 The number of edges B shown is at most 3.

[0109] In some examples of this implementation, adjusting the fluorescence brightness of the adjusting lens further includes: if the number of second edges is 0, then for each first edge, adjusting the adjusting lens according to the third adjustment strategy corresponding to the first edge, so that the first edge moves in the direction of reducing the laser spot until it can no longer move, to obtain the strongest fluorescence brightness and the corresponding moving position, and adjusting the adjusting lens according to the second adjustment strategy corresponding to the first edge until the first edge is reset; determining the first edge and moving position corresponding to the maximum value in the strongest fluorescence brightness, to obtain the target edge and the target position; and adjusting the adjusting lens according to the third adjustment strategy corresponding to the target edge until the target edge moves to the target position.

[0110] Specifically, if the number of edges B is 0, such as Figure 10 As shown, this indicates that there are NV color centers within the edges of the laser spot. Each edge A is moved in the direction of shrinking the laser spot until it can no longer be moved. The fluorescence brightness is observed, the strongest fluorescence brightness and its corresponding moving position are obtained, and the spot is reset to its original position, thus obtaining 4 strongest fluorescence brightness. The 4 strongest fluorescence brightness are compared and the maximum value and its corresponding moving position and edge A are obtained. The edge A corresponding to the maximum value of the strongest fluorescence brightness is moved to its corresponding moving position.

[0111] In other examples of this implementation, adjusting the fluorescence brightness using the adjusting lens further includes: if the number of second edges is non-zero, adjusting the adjusting lens according to a second adjustment strategy corresponding to each second edge, so that the second edge moves in the direction of increasing the laser spot until the fluorescence brightness no longer decreases; adjusting the adjusting lens according to a third adjustment strategy corresponding to each first edge, so that the first edge moves in the direction of decreasing the laser spot until it can no longer move, obtaining the strongest fluorescence brightness and the corresponding moving position, and adjusting the adjusting lens according to the second adjustment strategy corresponding to the first edge until the first edge is reset; adjusting the adjusting lens according to the third adjustment strategy corresponding to each second edge, so that the second edge moves in the direction of decreasing the laser spot until it can no longer move, obtaining the strongest fluorescence brightness and the corresponding moving position, and adjusting the adjusting lens according to the second adjustment strategy corresponding to the second edge until the second edge is reset; determining the edge and moving position corresponding to the maximum value among the strongest fluorescence brightness, obtaining the target edge and the target position; and adjusting the adjusting lens according to the third adjustment strategy corresponding to the target edge until the target edge moves to the target position.

[0112] Specifically, if the number of edges B is not zero, as shown in Figures 11(a)-11(d) (the number of edges B in Figure 11(a) is 1, the number of edges B in Figures 11(b) and 11(c) is 2, and the number of edges B in Figure 11(d) is 3), each edge B is moved in the direction of increasing the laser spot size until the fluorescence brightness no longer decreases (i.e., it increases or remains unchanged).

[0113] Next, each edge A and each edge B is moved in the direction of shrinking the laser spot until it can no longer be moved. The fluorescence brightness is observed, the strongest fluorescence brightness and its corresponding moving position are obtained, and the spot is reset to its original position, thus obtaining 4 strongest fluorescence brightness. The 4 strongest fluorescence brightness are compared and the maximum value and its corresponding moving position and edge A or edge B are obtained. The edge A or edge B corresponding to the maximum value of the strongest fluorescence brightness is moved to its corresponding moving position, thus obtaining a laser spot that meets the target excitation requirements.

[0114] Based on the NV color center excitation laser modulation method of the above embodiments, the present invention proposes a computer-readable storage medium.

[0115] In an embodiment of the present invention, a computer program is stored on a computer-readable storage medium. When the computer program is executed by a processor, it implements the adjustment method for NV color center-excited lasers described in the above embodiment.

[0116] The above method can quickly locate the position of the color center cluster, enhance the concentration of the laser, improve the laser intensity and effective utilization, increase the fluorescence brightness, and thus improve the accuracy and sensitivity of the equipment.

[0117] Figure 12 This is a structural block diagram of a control device according to an embodiment of the present invention.

[0118] like Figure 12 As shown, the control device 500 includes a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, for example, via a bus 502. Optionally, the control device 500 may also include a transceiver 504. It should be noted that in practical applications, the transceiver 504 is not limited to one type, and the structure of this control device 500 does not constitute a limitation on the embodiments of the present invention.

[0119] Processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this invention. Processor 501 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0120] Bus 502 may include a pathway for transmitting information between the aforementioned components. Bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 502 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 12 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0121] The memory 503 stores a computer program corresponding to the adjustment method for NV color center-excited lasers in the above embodiments of the present invention. This computer program is controlled and executed by the processor 501. The processor 501 executes the computer program stored in the memory 503 to implement the content shown in the aforementioned method embodiments. Figure 12 The control device 500 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0122] Figure 13 This is a structural block diagram of the measuring device according to an embodiment of the present invention.

[0123] like Figure 13 As shown, the measuring device 1000 includes: an NV color center excitation laser adjustment system 100, a diamond 200, and a control device 500 as described in the above embodiment.

[0124] Among them, see Figures 1-3The NV color center excitation laser debugging system 100 includes a laser 1, at least two adjustment lenses (such as a first adjustment lens 221 and a second adjustment lens 222) arranged in sequence, and a focusing lens 21. The laser 1 is used to emit a target laser, the at least two adjustment lenses are used to expand the target laser beam, and the focusing lens 21 is used to focus the expanded target laser beam to generate a laser spot.

[0125] In summary, the adjustment method, medium, control device, and measuring equipment for NV center-excited lasers according to the embodiments of the present invention can not only achieve the beneficial effects of the NV center-excited laser debugging system and method described above, but also quickly locate the position of the color center cluster, enhance the concentration of the laser, improve the laser intensity and effective utilization rate, increase the fluorescence brightness, thereby improving the accuracy and sensitivity of the measuring equipment.

[0126] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0127] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0128] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0130] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0131] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0132] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0133] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for adjusting NV color center-excited laser, characterized in that, A laser calibration system for NV color center excitation includes a laser, at least two adjustment lenses, and a focusing lens arranged sequentially. The laser emits a target laser beam, the at least two adjustment lenses expand the target laser beam, and the focusing lens focuses the expanded target laser beam to generate a laser spot. The method includes: The adjustment lens is adjusted according to the laser spot so that the shape and size of the laser spot match the shape and size of the target diamond laser incident surface; The adjustment lens is adjusted according to the fluorescence brightness generated by the laser spot when the NV color center in the target diamond is excited by the laser spot, so as to reduce the area of ​​the laser spot and adjust the position of the laser spot illuminating the laser incident surface of the target diamond, and make the fluorescence brightness meet the target excitation requirements. The laser spot includes multiple edges; the fluorescence brightness is adjusted by the adjusting lens, and further includes: For each edge of the laser spot, the adjustment lens is adjusted according to the second adjustment strategy corresponding to the edge, so that the edge moves in the direction of increasing the laser spot until the fluorescence brightness no longer decreases, thus obtaining the first edge; If the fluorescence brightness continues to decrease during the process of moving the edge in the direction of increasing the laser spot, the adjustment lens is adjusted according to the third adjustment strategy corresponding to the edge so that the edge moves in the direction of decreasing the laser spot until the fluorescence brightness no longer increases, thus obtaining the second edge.

2. The method for adjusting the NV color center-excited laser according to claim 1, characterized in that, The method further includes: After the fluorescence brightness meets the target excitation requirements, the laser power intensity of the laser is reduced until the fluorescence brightness is reduced to a preset brightness threshold.

3. The method for adjusting the NV color center-excited laser according to claim 1, characterized in that, The number of adjusting lenses is two, namely a first adjusting lens and a second adjusting lens; the adjustment of the adjusting lenses according to the laser spot includes: The laser spot is detected by a laser detection device to obtain a detection result, wherein the distance between the detection surface of the laser detection device and the focusing lens is the same as the distance between the laser incident surface and the focusing lens; Based on the detection results and the shape and size of the laser incident surface, a target adjustment strategy is determined; According to the target adjustment strategy, the parameters b and α of the first adjustment lens and the parameters c and β of the second adjustment lens are adjusted respectively, where b and c represent the distances between the first adjustment lens, the second adjustment lens and the focusing lens, respectively, and α and β represent the angles between the positioning axis of the first adjustment lens, the positioning axis of the second adjustment lens and the preset direction, respectively.

4. The method for adjusting the NV color center-excited laser according to claim 1, characterized in that, The shape and size of the laser spot match the shape and size of the laser incident surface, meaning that the shape of the laser spot is the same as the shape of the laser incident surface, and the size of the laser spot is less than or equal to the size of the laser incident surface and greater than or equal to half the size of the laser incident surface.

5. The method for adjusting the NV color center-excited laser according to claim 1, characterized in that, The fluorescence brightness is adjusted by the adjusting lens, including: The adjustment lens is adjusted according to the first adjustment strategy so that the laser spot is proportionally reduced with the center point of the laser incident surface as the reference point until the fluorescence brightness no longer increases or the target excitation requirement is met.

6. The method for adjusting the NV color center-excited laser according to claim 1, characterized in that, The method of adjusting the fluorescence brightness using the adjusting lens further includes: If the number of second edges is 0, then for each first edge, the adjustment lens is adjusted according to the third adjustment strategy corresponding to the first edge, so that the first edge moves in the direction of reducing the laser spot until it can no longer move, to obtain the strongest fluorescence brightness and the corresponding moving position, and the adjustment lens is adjusted according to the second adjustment strategy corresponding to the first edge until the first edge is reset. Determine the first edge and the moving position corresponding to the maximum value among the strongest fluorescence brightness to obtain the target edge and target position; The adjustment lens is adjusted according to the third adjustment strategy corresponding to the target edge until the target edge moves to the target position.

7. The method for adjusting the NV color center-excited laser according to claim 1, characterized in that, The method of adjusting the fluorescence brightness using the adjusting lens further includes: If the number of the second edges is non-zero, for each second edge, the adjustment lens is adjusted according to the second adjustment strategy corresponding to the second edge, so that the second edge moves in the direction of increasing the laser spot until the fluorescence brightness no longer decreases; For each of the first edges, the adjustment lens is adjusted according to the third adjustment strategy corresponding to the first edge, so that the first edge moves in the direction of reducing the laser spot until it can no longer move, to obtain the strongest fluorescence brightness and the corresponding moving position, and then the adjustment lens is adjusted according to the second adjustment strategy corresponding to the first edge until the first edge is reset. For each of the second edges, the adjustment lens is adjusted according to the third adjustment strategy corresponding to the second edge, so that the second edge moves in the direction of reducing the laser spot until it can no longer move, to obtain the strongest fluorescence brightness and the corresponding moving position, and the adjustment lens is adjusted according to the second adjustment strategy corresponding to the second edge until the second edge is reset; Determine the edge and movement position corresponding to the maximum value among the strongest fluorescence brightness to obtain the target edge and target position; The adjustment lens is adjusted according to the third adjustment strategy corresponding to the target edge until the target edge moves to the target position.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for adjusting the NV color center-excited laser as described in any one of claims 1-7.

9. A control device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, When the computer program is executed by the processor, it implements the method for adjusting the NV color center-excited laser as described in any one of claims 1-7.

10. A measuring device, characterized in that, include: NV color center excitation laser tuning system, diamond, and control device as described in claim 9; The NV color center excitation laser debugging system includes a laser, at least two adjustment lenses, and a focusing lens arranged in sequence. The laser is used to emit a target laser, the at least two adjustment lenses are used to expand the target laser beam, and the focusing lens is used to focus the expanded target laser beam to generate a laser spot.

Images