Active damping adjustment laser and method of use

Abstract

The application relates to the technical field of lasers, and discloses an active damping adjustment laser and an application method thereof, which comprise a shell, a rotating shaft, a swing arm, a bolt and an adjustment piece, wherein the shell is provided with a laser cavity; the rotating shaft is arranged in the laser cavity; one end of the swing arm is rotationally matched with the rotating shaft, the other end of the swing arm is provided with a reflecting mirror, and an arc-shaped groove is arranged on the swing arm; one end of the bolt is connected with the shell, and the other end of the bolt penetrates through the arc-shaped groove; one end of the adjustment piece is connected with the rotating shaft and has a temperature control function, and the other end of the adjustment piece extends to a matching gap between the bolt and the arc-shaped groove and is arranged in an expanded structure. The temperature of the rotating shaft can be actively adjusted, so that the swing arm and the rotating shaft matching structure have an optimal working temperature, so as to avoid the influence of the temperature factor on the reliability of adjustment; meanwhile, the scheme does not involve electromagnetic components, potential interference of a stray magnetic field is fundamentally eliminated, the purity of a measurement signal and the certainty of control system work are ensured, and a complex magnetic shielding structure does not need to be additionally designed.

Description

Technical Field

[0001] This invention relates to the field of tunable laser technology, and more particularly to an actively damped adjustable laser and its application method. Background Technology

[0002] Tunable lasers are one of the core light sources in modern precision optical systems. By changing the optical length of the resonant cavity, they achieve continuous or stepped tuning of the output laser wavelength and are widely used in high-resolution spectral analysis, lidar, wavelength selection for optical communication, and optical coherence tomography. The core mechanical action for wavelength tuning in a tunable laser is typically accomplished by a driver pushing a swing arm carrying a mirror or grating to rotate slightly around a certain axis. The rapid extension and retraction of the driver, combined with the inertia of the swing arm mechanism, easily induces mechanical vibrations and residual oscillations during startup, shutdown, and high-speed movement. These undesirable mechanical vibrations are directly transmitted to the optical components, causing unpredictable micro-fluctuations in the optical length of the resonant cavity. This ultimately manifests as dithering of the output laser wavelength, nonlinear tuning, or spectral linewidth broadening, severely limiting the system's performance in scenarios requiring high-precision and high-stability measurements. Simultaneously, various external factors, such as sound, temperature, and vibration, can also affect the laser.

[0003] Existing patent document US20100183038A1 discloses a tuning arm system for a tunable external cavity diode laser system. This patent integrates a magnetic damping device into the tuning arm system of the tunable laser. Its core concept is to utilize the magnetic field interaction between a magnet fixed on a base and a magnetic component mounted on the tuning arm to suppress parasitic oscillations of the tuning arm caused by external acoustic or mechanical disturbances, thereby achieving the purpose of stabilizing the laser wavelength.

[0004] The aforementioned solution suppresses vibration through magnetism. However, this solution directly places the magnetic device within its groove without considering magnetic shielding. This can easily cause magnetic field interference inside the laser, which integrates numerous precision photoelectric sensors, increasing complexity and uncertainty. Furthermore, existing solutions generally lack temperature control capabilities, which means the laser will not have a suitable operating temperature range when used in extreme environments, thus affecting its adjustment performance. Summary of the Invention

[0005] In view of this, the present invention proposes an actively damped adjustable laser and its application method that does not generate magnetic field interference and can actively regulate the operating temperature, so as to solve the problem that the existing solutions are prone to magnetic field interference due to the use of magnetic damping devices and cannot achieve active regulation of the operating temperature.

[0006] The technical solution of this invention is implemented as follows: On one hand, the present invention provides an actively damped adjustable laser, comprising a housing, a rotating shaft, a swing arm, bolts, and an adjusting component, wherein, The housing has a laser cavity; The rotating shaft is located inside the laser cavity, and one end is connected to the housing; One end of the swing arm is rotatably engaged with the rotating shaft, and a reflector is installed on the other end. An arc-shaped groove is also provided on the swing arm. One end of the bolt is connected to the housing, and the other end passes through the arc-shaped groove; One end of the adjusting component is connected to the rotating shaft and has a temperature control function, while the other end extends to the fitting gap between the bolt and the arc groove and is set as a tightening structure.

[0007] Based on the above technical solutions, preferably, the adjusting component includes a groove plate, a first plate, an inclined plate, a second plate, and an air cylinder, wherein, The slotted plate is inserted into the rotating shaft; One end of the first plate is connected to the trough plate, and the first plate and the trough plate have a first flow channel that is interconnected. One end of the inclined plate is connected to the first plate; The second section is a suspended structure, and the second section is connected to the other end of the inclined plate; One end of the air cylinder is connected to the second plate, and the other end extends to the fitting gap between the bolt and the arc groove. The second plate has a second flow channel that communicates with the air cylinder.

[0008] Based on the above technical solutions, a preferred embodiment further includes a cover plate and an adjusting rod, wherein... The cover plate is connected to the housing to seal the laser cavity; The adjusting component is equipped with fiber optic sensors, which are laid on the first plate, the inclined plate, and the second plate. The adjusting rod is rotatably mounted on the cover plate. One end of the adjusting rod is inserted into the head of the bolt and positioned circumferentially. The other end of the adjusting rod extends to the outside of the cover plate. The first plate and the bolt are on the same horizontal plane.

[0009] Based on the above technical solutions, preferably, the system also includes a reflector frame and an electromagnetic induction damper, wherein, One end of the reflector mount is connected to the swing arm, and the other end is used to mount the reflector; The electromagnetic induction damper includes a shielding cylinder connected to the housing, a support installed inside the shielding cylinder, an excitation coil installed on the support, and a magnetic element installed at the end of the swing arm.

[0010] Based on the above technical solutions, preferably, it also includes a control unit, which is configured to output a real-time excitation current control signal to the electromagnetic induction damper according to the preset target motion curve of the swing arm, so that the electromagnetic induction damper generates a real-time controlled magnetic induction intensity.

[0011] Based on the above technical solutions, preferably, a control valve is also included, which is installed on the housing; The first flow channel has a branch that is connected to one port of the control valve; The second flow channel is located in a ring shape within the second plate; The second section also has a third flow channel, which surrounds the second flow channel, and one port of the third flow channel is connected to the other port of the control valve.

[0012] Based on the above technical solutions, the preferred embodiment also includes a limiting post and a connecting pipe, wherein, Two limit posts are provided on the housing, and the two limit posts are located opposite each other on both sides of the control valve; Two connecting pipes are provided corresponding to the limiting post. The connecting pipes are partially configured as a spiral tower-shaped part, which is sleeved on the limiting post. The top of the spiral tower-shaped part is attached to the limiting post and connected to the port of the control valve. The bottom of the spiral tower-shaped part does not contact the limiting post and is connected to the first flow channel or the third flow channel.

[0013] On the other hand, the present invention provides a method for applying the above-mentioned actively damped adjustable laser, comprising the following steps: S1. Piezoelectric ceramic is used as the actuator and is placed inside the laser cavity; S2. Based on the ambient temperature, a liquid medium is introduced into the first flow channel to regulate the temperature of the rotating shaft. After the laser continues to work and heats up, the heat of the liquid medium is reduced to maintain thermal balance. S3. Gas is introduced into the second flow channel to drive the air expansion cylinder to expand and press against the inner wall of the arc-shaped groove to adjust the frictional resistance. S4. The swing arm is driven by the driver to achieve laser tuning.

[0014] Based on the above technical solutions, the preferred embodiment also includes the following steps: The fluid is regulated to enter the third flow channel of the first plate by the control valve, and the airflow temperature in the second flow channel is regulated by the swing arm heat exchange, thereby regulating the temperature of the air expansion cylinder to reduce the influence of temperature on the expansion coefficient of the air expansion cylinder.

[0015] Furthermore, this invention provides another method for applying an actively damped adjustable laser, comprising the following steps: P1, Preset target motion curve of the swing arm; P2. Determine the real-time target linear velocity of the swing arm during its movement based on the preset target motion curve of the swing arm. P3. Based on the real-time target linear velocity and according to the damping torque formula, the control unit calculates and generates the real-time excitation current control signal. P4. Output the excitation current control signal to the excitation coil; P5. The electromagnetic induction damper generates a real-time damping torque related to the swing arm's movement speed based on the excitation current control signal, driving the swing arm to move according to the target motion curve.

[0016] The active damping modulated laser and its application method of the present invention have the following advantages over the prior art: (1) By setting an adjustment component and configuring the end of the adjustment component connected to the rotating shaft to have a temperature control function, the temperature of the rotating shaft can be actively adjusted, thereby stabilizing the working temperature of the swing arm and the rotating shaft in the preset optimal range, so as to avoid the external temperature factors affecting the reliability of laser adjustment; at the same time, in this scheme, the adjustment component and the bolt are set as an expansion structure, which relies on the expansion with the arc groove on the swing arm to achieve frictional damping. Since no electromagnetic components are involved, the potential interference of stray magnetic field to the precision photoelectric sensor signal in the laser cavity is fundamentally eliminated, ensuring the purity of the measurement signal and the determinism of the control system operation, and there is no need to design a complex magnetic shielding structure.

[0017] (2) In this scheme, the first plate and the groove plate of the adjusting component are opened into the first flow channel, so that the temperature of the rotating shaft can be adjusted by the heat exchange of the fluid circulation. The second plate is opened into the second flow channel, so that the fluid can flow to adjust the expansion of the air cylinder, thereby controlling the damping force and realizing vibration suppression. In the structure of the adjusting component, the adjusting component is inserted into the rotating shaft through the groove plate and fixed by bolts through the second plate. This has the advantage of convenient installation and will not interfere with the adjustment displacement of the swing arm.

[0018] (3) By installing fiber optic sensors on the adjusting component and setting an adjusting rod on the cover plate, after the cover plate is installed on the housing to achieve closure, the state of the adjusting component can be detected by fiber optic sensors. Thus, when the adjusting component undergoes slight deformation, the cover plate does not need to be opened, and the bolt tightening state of the adjusting component can be adjusted by simply adjusting the adjusting rod to eliminate slight deformation of the adjusting component caused by bolt tightening, avoid slight deformation of the adjusting component causing the air cylinder to shift, and prevent the generation of damping that affects stability.

[0019] (4) By setting a third flow channel, control valve, limit post and connecting pipe, the medium used to regulate the temperature of the rotating shaft can exchange heat with the fluid in the second flow channel, thereby regulating the temperature of the air expansion cylinder to ensure that the air expansion cylinder also has a suitable working temperature and that its working environment is reliable; at the same time, the connecting pipe used to connect the flow channel is equipped with a spiral tower-shaped part and is connected to the limit post, so that when the control valve is opened and closed, the vibration generated by the control valve can be eliminated through the spiral tower-shaped part to avoid interfering with the adjustment action of the laser.

[0020] (5) By setting up an electromagnetic induction damper and control unit, it is possible to achieve real-time, quantitative and linear precise control of the damping force, realizing the ideal state of providing strong damping to suppress oscillations during high-speed motion and reducing damping to maintain agility during low-speed or positioning, overcoming the defect of traditional passive magnetic damping where the damping force increases nonlinearly at high speeds, leading to distortion of the motion curve. Secondly, by placing the excitation coil inside the magnetically shielded cylinder and combining it with the above-mentioned controllable current adjustment, this method effectively isolates the magnetic field from interference to other precision photoelectric sensors inside the laser cavity while providing strong and controllable damping.

[0021] (6) This scheme combines pneumatic damping and electromagnetic damping. Pneumatic damping can suppress low-frequency, large-amplitude impact disturbances and rapidly attenuate large-amplitude vibrations, while electromagnetic induction damping is mainly used to smooth high-frequency, small-amplitude continuous vibrations. Its damping force is proportional to the speed and the response is extremely fast. In this way, the two types of damping can be dynamically allocated or combined according to the swing arm motion state and disturbance characteristics. Under normal conditions, electromagnetic damping is used to maintain smoothness. When a large impact is detected, the pneumatic damping is instantly activated to intervene strongly. When extreme static stability is required, the pneumatic damping can be completely disengaged, and only electromagnetic damping is used to filter out micro-vibrations. The two not only form heterogeneous redundancy, but also work together to achieve seamless coverage and efficient suppression of mechanical disturbances in the full frequency band and multiple amplitudes, so that the swing arm motion can track complex curves with high fidelity. This fundamentally ensures the ultra-high linearity and stability of the laser wavelength output and achieves system-level robustness that cannot be achieved by a single damping form. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of the actively damped adjustable laser of the present invention; Figure 2 This is an exploded view of the actively damped adjustable laser of the present invention; Figure 3 This is a diagram showing the opening structure of the cover plate of the active damping adjustable laser of the present invention; Figure 4 This is a top view of the internal structure of the laser cavity of the actively damped adjustable laser of the present invention; Figure 5 This is a three-dimensional view of the internal structure of the laser cavity of the actively damped adjustable laser of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A in the middle; Figure 7 This is a perspective view of the separation structure of the adjustment component and the swing arm in the active damping adjustable laser of the present invention; Figure 8 This is a perspective view of the connection structure between the regulating component and the control valve of the active damping adjustable laser of the present invention; Figure 9 This is a perspective view of the separation structure of the bolt and adjustment component of the active damping adjustable laser of the present invention; Figure 10 This is a side view of the adjustment component of the active damping adjustable laser of the present invention; Figure 11 For the present invention Figure 10 Sectional view along the AA direction; Figure 12 This is a connection structure diagram of the active damping adjustable laser reflector frame, swing arm and electromagnetic induction damper of the present invention. Figure 13 For the present invention Figure 12 Cross-sectional view along the BB direction; Figure 14 This is a flowchart illustrating the steps of the active damping adjustable laser method of the present invention. In the diagram: 1. Shell; 101. Laser cavity; 2. Rotating shaft; 3. Swing arm; 301. Arc groove; 4. Bolt; 5. Adjusting component; 51. Slot plate; 52. First plate; 53. Inclined plate; 54. Second plate; 55. Air cylinder; 501. First flow channel; 502. Second flow channel; 503. Third flow channel; 6. Cover plate; 7. Adjusting rod; 8. Reflector frame; 9. Electromagnetic induction damper; 91. Shielding cylinder; 92. Support; 93. Excitation coil; 94. Magnetic element; 10. Control valve; 11. Limiting post; 12. Connecting pipe; 121. Spiral tower-shaped part. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 the embodiments of the present invention 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 the embodiments of the present invention.

[0027] 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 one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] 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.

[0029] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0030] like Figures 1-13 As shown, the active damping adjustable laser of the present invention includes a housing 1, a rotating shaft 2, a swing arm 3, a bolt 4, an adjusting component 5, a cover plate 6, an adjusting rod 7, a reflector frame 8, an electromagnetic induction damper 9, a control valve 10, a limiting post 11, and a connecting pipe 12.

[0031] like Figures 1-6 As shown, the housing 1 has a laser cavity 101; the rotating shaft 2 is located inside the laser cavity 101 and has one end connected to the housing 1; one end of the swing arm 3 is rotatably engaged with the rotating shaft 2, and a reflector is installed on the other end, and an arc groove 301 is provided on the swing arm 3; one end of the bolt 4 is connected to the housing 1, and the other end passes through the arc groove 301; one end of the adjusting component 5 is connected to the rotating shaft 2 and has a temperature control function, and the other end extends to the fit gap between the bolt 4 and the arc groove 301 and is set as a tightening structure.

[0032] As described in the above technical solution, the laser cavity 101 of the housing 1 is used for the installation and use of various components.

[0033] The rotating shaft 2 is installed inside the laser cavity 101. One end of the swing arm 3 is rotated and engaged with the rotating shaft 2. At the same time, a driver is installed inside the laser cavity 101 to drive the swing arm 3 to move, thereby synchronously driving the reflector to perform synchronous movements, thus realizing the tuning operation.

[0034] The adjusting component 5 is used to adjust the damping force of the swing arm 3 and the temperature of the rotating shaft 2, to ensure that the damping of the swing arm 3 is appropriate and that the fit between the swing arm 3 and the rotating shaft 2 has a suitable working temperature.

[0035] Specifically, one end of the adjusting component 5 is inserted into the interior of the rotating shaft 2 and is equipped with a temperature control function for adjusting the temperature of the rotating shaft 2, thereby ensuring the stable cooperation between the rotating shaft 2 and the swing arm 3.

[0036] The other end of the adjusting component 5 extends partially into the arc-shaped groove 301 and is equipped with an expansion structure, so that it can resist the inner wall of the arc-shaped groove 301 through the expansion effect to achieve damping adjustment; thus, it can suppress low-frequency, large-amplitude impact disturbances.

[0037] Furthermore, a bolt 4 is provided, one end of which passes through the arc groove 301 and connects to the housing 1 to position the bolt 4, while the other end of the bolt 4 abuts against the adjusting member 5, thus fixing the adjusting member 5.

[0038] In the specific structure, the expansion structure of the adjusting component 5 extends into the gap between the bolt 4 and the arc groove 301. Thus, one side of the expansion structure abuts against the bolt 4, and the other side is used to expand and abut against the inner wall of the arc groove 301, thereby achieving stable damping adjustment; at the same time, it has the advantages of high integration of the overall structure and convenient assembly.

[0039] Thus, this solution can effectively avoid the influence of external temperature factors on the reliability of laser adjustment. At the same time, it relies on the expansion structure and the arc groove 301 on the swing arm 3 to achieve frictional damping. Since it does not involve electromagnetic components, it fundamentally eliminates the potential interference of stray magnetic fields on the signals of precision photoelectric sensors in the laser cavity, ensuring the purity of the measurement signal and the determinism of the control system operation, and eliminating the need for additional complex magnetic shielding structures.

[0040] like Figures 6-11 As shown, the adjusting component 5 includes a groove plate 51, a first plate 52, an inclined plate 53, a second plate 54, and an air cylinder 55. The groove plate 51 is inserted into the rotating shaft 2. One end of the first plate 52 is connected to the groove plate 51, and a first flow channel 501 is formed in the interior of the first plate 52 and the groove plate 51. One end of the inclined plate 53 is connected to the first plate 52. The second plate 54 is a suspended structure, and the other end of the second plate 54 is connected to the other end of the inclined plate 53. One end of the air cylinder 55 is connected to the second plate 54, and the other end extends to the fitting gap between the bolt 4 and the arc groove 301. A second flow channel 502 is formed in the interior of the second plate 54, which is in communication with the air cylinder 55.

[0041] As described above, the groove plate 51 of the adjusting member 5 is configured as a multi-faceted prism structure, so that the adjusting member 5 can be positioned after the groove plate 51 is inserted into the rotating shaft 2.

[0042] The first plate 52 is connected to the slot plate 51. The first flow channel 501 is formed in the slot plate 51 and the first plate 52. The interface of the flow channel is set on the first plate 52. The first plate 52 has a larger top area than the slot plate 51, which makes it easier to lay out the flow channel interface.

[0043] The second plate 54 is connected to the first plate 52 via the inclined plate 53, and the second plate 54 has a slot for the bolt 4 to pass through. After the bolt 4 is installed, the head of the bolt 4 abuts against the second plate 54. With the insertion of the slot plate 51 and the rotating shaft 2, the adjusting component 5 can be fixed.

[0044] Specifically, the second plate 54 is connected to an air cylinder 55 extending to the gap between the bolt 4 and the arc-shaped groove 301. A second flow channel 502 communicating with the air cylinder 55 is formed within the second plate 54. The interface of the second flow channel 502 is located on the second plate 54, facilitating the introduction of a fluid medium to control the expansion of the air cylinder 55. When the swing arm 3 experiences impact interference, the air cylinder 55 can rapidly expand to clamp the swing arm 3, thereby helping to quickly dampen vibration and ensure operational stability. Specifically, the air cylinder 55 can be configured as a more precise air-expanding structure, such as a pneumatic muscle.

[0045] Specifically, the second section 54 is a suspension structure that does not contact the swing arm 3 to avoid generating additional friction that could affect operation.

[0046] like Figure 2 and Figure 6 As shown, the cover plate 6 is connected to the housing 1 to seal the laser cavity 101; the adjusting member 5 is equipped with an optical fiber sensor, which is laid on the first plate 52, the inclined plate 53 and the second plate 54; the adjusting rod 7 is rotatably mounted on the cover plate 6, one end of the adjusting rod 7 is inserted into the head of the bolt 4 and positioned circumferentially, and the other end of the adjusting rod 7 extends to the outside of the cover plate 6; the first plate 52 and the bolt 4 are located on the same horizontal plane.

[0047] As described above, the cover plate 6 is used to enclose the laser cavity 101 of the housing 1, and the fiber optic sensor is laid on the first plate 52, the inclined plate 53 and the second plate 54 to detect the state of the adjustment member 5.

[0048] Specifically, since the second plate 54 is a suspended structure, it is installed and fixed with bolts 4. If the tightening force is not appropriate, the second plate 54 will undergo slight deformation, which will easily affect the verticality of the air cylinder 55, and thus affect the application of damping force to the swing arm 3. Therefore, it is necessary to inspect its shape.

[0049] Specifically, the fiber optic sensor can be a fiber Bragg grating, laid on the adjustment component 5, to accurately detect the shape of the adjustment component 5.

[0050] After the adjusting component 5 is installed and fixed by the bolts 4, the laser cavity 101 is sealed by the cover plate 6 to make the inside of the laser cavity 101 stable. At this time, the shape of the adjusting component 5 is checked.

[0051] After the cover plate 6 is installed, the adjusting rod 7 will be inserted into the head of the bolt 4. If the shape of the adjusting part 5 is abnormal, the adjusting rod 7 can be rotated from the outside to adjust the tightening force of the bolt 4, thereby correcting the posture of the adjusting part 5.

[0052] Specifically, the adjusting member 5 is configured to have a suitable amount of elasticity so that when adjusting the tightening force of the bolt 4, the adjusting member 5 can adapt to springback correction.

[0053] Specifically, the middle section of the adjusting rod 7 is set as a cylindrical structure, which rotates and is axially positioned with the cover plate 6. The two ends of the adjusting rod 7 are set as prism structures to facilitate insertion and circumferential positioning with the bolt 4, and to facilitate rotation operation with a wrench.

[0054] In some embodiments, the adjusting rod 7 is located at one end outside the cover plate 6 and is connected to a micro servo motor to automatically adjust the tightening force of the bolt 4.

[0055] In the aforementioned structure, no electromagnetic components are provided to eliminate the potential interference of stray magnetic fields on the signals of the precision photoelectric sensors inside the laser cavity. In some embodiments, to ensure the stable operation of the laser under multiple operating conditions, relevant electromagnetic components are also employed, provided that proper electromagnetic shielding measures are taken.

[0056] like Figure 8 , Figure 9 , Figure 12 and Figure 13 As shown, one end of the reflector frame 8 is connected to the swing arm 3, and the other end is used to install the reflector; the electromagnetic induction damper 9 includes a shielding cylinder 91 connected to the housing 1, a support 92 installed inside the shielding cylinder 91, an excitation coil 93 installed on the support 92, and a magnetic element 94 installed at the end of the swing arm 3.

[0057] As described above, the mirror mount 8 is used to mount the mirror, and then adjusts the position of the mirror by following the movement of the swing arm 3.

[0058] To suppress the vibration generated by the swing arm 3 during its movement, an electromagnetic induction damper 9 is provided. In its structure, the shielding cylinder 91 is installed in the housing 1 through a bracket. It is made of a high magnetic permeability material, such as permalloy, and mainly plays a magnetic shielding role to constrain the magnetic field and prevent it from interfering with other precision optoelectronic components inside the laser.

[0059] The support 92 is installed inside the shielding cylinder 91 to provide a stable mounting reference. The excitation coil 93 is fixedly mounted on the support 92, and the control unit is used to provide a controlled excitation current to the excitation coil 93. Thus, in application, by adjusting the signal output to the excitation coil 93, the magnitude of the damping force can be precisely controlled, thereby ensuring that the swing arm 3 can smoothly and accurately track the target motion curve, ultimately ensuring the linear and stable output of the laser wavelength.

[0060] like Figure 6 , Figure 8 and Figure 11As shown, the control valve 10 is mounted on the housing 1; the first flow channel 501 has a branch and is connected to one port of the control valve 10; the second flow channel 502 is formed in a ring shape and is located within the second plate 54; the second plate 54 is also provided with a third flow channel 503, which surrounds the second flow channel 502, and one port of the third flow channel 503 is connected to the other port of the control valve 10. As described above, in order to avoid the temperature factors affecting the application stability of the air cylinder 55, a third flow channel 503 is provided in the second plate 54 and configured to surround the second flow channel 502. At the same time, the third flow channel 503 is connected to a branch of the first flow channel 501 through a switching valve.

[0061] In this way, when working, the medium in the first flow channel 501 can enter the third flow channel 503 through the control valve 10 to exchange heat with the fluid medium in the second flow channel 502. This allows the regulating component 5 to not only regulate the temperature of the rotating shaft 2, but also to regulate the temperature of the air expansion cylinder 55, so as to ensure that the air expansion cylinder 55 also has a suitable working temperature and makes its working environment reliable.

[0062] like Figure 8 As shown, two limit posts 11 are provided on the housing 1, and the two limit posts 11 are located opposite each other on both sides of the control valve 10; two connecting pipes 12 are provided corresponding to the limit posts 11, and a part of the connecting pipe 12 is configured as a spiral tower-shaped part 121. The spiral tower-shaped part 121 is sleeved on the limit post 11. The top end of the spiral tower-shaped part 121 is attached to the limit post 11 and is connected to the port of the control valve 10. The bottom end of the spiral tower-shaped part does not contact the limit post 11 and is connected to the first flow channel 501 or the third flow channel 503.

[0063] As described above, the control valve 10 is connected to the first flow channel 501 and the third flow channel 503 through two connecting pipes 12.

[0064] Specifically, the control valve 10 is mounted on the housing 1 via an elastic base to prevent vibration caused by the operation of the control valve 10 from affecting the normal adjustment of the reflector.

[0065] The connecting pipe 12 is provided with a spiral tower-shaped part 121. The bottom end of the spiral tower-shaped part 121 has a large annular diameter and does not contact the limiting post 11. It is configured to connect with the control valve 10. In this way, even if the slight vibration of the control valve 10 is transmitted to the connecting pipe 12, it will be buffered and eliminated, thereby avoiding the vibration transmission from affecting the adjustment work.

[0066] The present invention discloses an application method for an actively damped adjustable laser, comprising the following steps: S1. A piezoelectric ceramic is used as the actuator and is placed inside the laser cavity 101; S2. According to the ambient temperature, a liquid medium is introduced into the first flow channel 501 to regulate the temperature of the rotating shaft 2 and ensure a suitable operating temperature range. After the laser continues to work and heats up, the temperature of the liquid medium is reduced to maintain thermal balance. S3. Gas is introduced into the second flow channel 502 to drive the air expansion cylinder 55 to expand and press against the inner wall of the arc groove 301 to adjust the frictional resistance. S4. Drive the swing arm 3 to swing through the driver to achieve laser tuning.

[0067] As described above, by working the air cylinder 55, it can be made to press against the inner wall of the arc-shaped groove 301, thereby adjusting the frictional resistance. Specifically, when the swing arm 3 experiences an impact, the essence of the impact is a short-duration, high-acceleration excitation. At the instant of the impact, the speed of the swing arm 3 rises rapidly from zero. The main harm of the impact lies not only in the instantaneous acceleration, but also in the fact that the energy it inputs is converted into continuous, low-frequency damped oscillations of the swing arm. The core function of the pneumatic damping is to intervene quickly in the first or second oscillation cycle after the impact occurs, using the air cylinder 55 to tighten and fix the swing arm 3, and quickly dissipate this part of the oscillation energy through strong friction, thereby quickly pulling the system back to a stable state from a state that may take dozens of cycles to decay naturally.

[0068] In some embodiments, the air cylinder 55 continuously applies a small damping force to the swing arm 3, which allows the swing arm 3 to behave more continuously in terms of drive clearance and backlash, and the motion curve may be smoother; when encountering a small disturbance, this basic force can provide an initial buffer to consume some energy, preventing the system from immediately entering the threshold that requires strong damping.

[0069] The method also includes the following steps: controlling the fluid to enter the third flow channel 503 of the first plate 52 by controlling the valve 10, and then controlling the airflow temperature in the second flow channel 502 by the swing arm 3 for heat exchange, thereby controlling the temperature of the air expansion cylinder 55 to reduce the influence of temperature on the expansion coefficient of the air expansion cylinder 55.

[0070] Furthermore, this solution also includes a control unit, which is configured to: output a real-time excitation current control signal to the electromagnetic induction damper 9 according to the preset target motion curve of the swing arm 3, so that the electromagnetic induction damper 9 generates a real-time controlled magnetic induction intensity, thereby ensuring that the damping torque experienced by the swing arm 3 during motion satisfies the following relationship: Mdamp(t)=KB·I(t)·v(t)·Larm; Wherein, KB is the magnetic field-current proportionality coefficient; I(t) is the real-time excitation current; v(t) is the real-time linear velocity of the swing arm 3 in m / s; and Larm is the damping arm, which is the distance from the rotating shaft 2 to the magnetic element 94.

[0071] As mentioned above, specifically, the magnetic induction intensity generated by the electromagnetic induction damper 9 is adjustable, so that the eddy current damping force F generated by the magnetic material during motion satisfies the following relationship: F = B·L·v(t)·k; Where B is the magnetic induction intensity generated by the electromagnetic induction damper 9; L is the effective cutting length m of the magnetic element 94; v(t) is the real-time linear velocity m / s of the swing arm 3; and k is the damping coefficient. The damping torque M generated by the damping force F on the swing arm 3 satisfies the following relationship: M=F·Larm=B·L·v(t)·k·Larm; Where F is the damping force; Larm is the damping arm, i.e. the distance from the rotating shaft 2 to the magnetic element 94; B is the magnetic induction intensity generated by the electromagnetic induction damper 9; L is the effective cutting length m of the magnetic element 94; v(t) is the real-time linear velocity m / s of the swing arm 3; and k is the damping coefficient.

[0072] like Figure 13 As shown, another application method of the actively damped adjustable laser of the present invention includes the following steps: P1, Preset target motion curve of swing arm 3; P2. Determine the real-time target linear velocity of the swing arm 3 during its movement based on the preset target motion curve of the swing arm 3. P3. Based on the real-time target linear velocity and according to the damping torque formula, the control unit calculates and generates the real-time excitation current control signal. P4. Output the excitation current control signal to the excitation coil 93; P5 and electromagnetic induction damper 9 generate a real-time damping torque related to the movement speed of swing arm 3 according to the excitation current control signal, and drive swing arm 3 to move according to the target motion curve.

[0073] In this embodiment, the motion parameters of the swing arm 3 are referenced; in other embodiments, the motion parameters of the reflector frame 8 are referenced.

[0074] As described above, the control unit can preset the current-time signal, adjust the excitation current of the electromagnetic induction damper 9, and output the target damping force until the target motion curve is reached.

[0075] Furthermore, a vibration sensor can be set to collect the displacement-time signal of the swing arm 3 in real time and send it to the control unit. Then, the displacement-time signal is converted into the magnetic field control strength of the excitation coil 93.

[0076] In normal applications, pneumatic damping can suppress low-frequency, large-amplitude impact disturbances and rapidly attenuate large-amplitude vibrations, while electromagnetic induction damping is mainly used to smooth high-frequency, small-amplitude continuous vibrations. Its damping force is proportional to the speed and its response is extremely fast. In this way, the two types of damping can be dynamically allocated or combined according to the motion state and disturbance characteristics of the swing arm 3. Under normal conditions, electromagnetic damping maintains smoothness. When a large impact is detected, the pneumatic damping is instantly activated to intervene strongly. When extreme static stability is required, the pneumatic damping can be completely disengaged, and only electromagnetic damping is used to filter out micro-vibrations. The two not only form heterogeneous redundancy, but also work together to achieve seamless coverage and efficient suppression of mechanical disturbances across the entire frequency band and multiple amplitudes. This allows the swing arm motion to track complex curves with high fidelity, fundamentally ensuring the ultra-high linearity and stability of the laser wavelength output, and achieving system-level robustness that cannot be achieved by a single damping form.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An actively damped adjustable laser, characterized in that: It includes a housing (1), a rotating shaft (2), a swing arm (3), bolts (4), and an adjusting component (5), wherein, The housing (1) has a laser cavity (101). The rotating shaft (2) is disposed inside the laser cavity (101), and one end is connected to the housing (1); One end of the swing arm (3) is rotatably engaged with the rotating shaft (2), and a reflector is installed on the other end. An arc groove (301) is provided on the swing arm (3). One end of the bolt (4) is connected to the housing (1), and the other end passes through the arc groove (301). One end of the adjusting member (5) is connected to the rotating shaft (2) and has a temperature control function, while the other end extends to the fitting gap between the bolt (4) and the arc groove (301) and is configured as a tightening structure. The adjusting component (5) includes a groove plate (51), a first plate (52), an inclined plate (53), a second plate (54), and an air cylinder (55). The groove plate (51) is inserted into the rotating shaft (2). One end of the first plate (52) is connected to the groove plate (51), and the first plate (52) and the groove plate (51) have a first flow channel (501) that communicates with each other. One end of the inclined plate (53) is connected to the first plate (52). The second plate (54) is a suspended structure, and the second plate (54) is connected to the other end of the inclined plate (53). One end of the air cylinder (55) is connected to the second plate (54), and the other end extends to the fitting gap between the bolt (4) and the arc groove (301). The second plate (54) has a second flow channel (502) that communicates with the air cylinder (55).

2. The actively damped adjustable laser as described in claim 1, characterized in that: It also includes a cover plate (6) and an adjusting rod (7), wherein, The cover plate (6) is connected to the housing (1) to seal the laser cavity (101). The adjusting component (5) is equipped with an optical fiber sensor, which is laid on the first plate (52), the inclined plate (53) and the second plate (54); The adjusting rod (7) is rotatably mounted on the cover plate (6). One end of the adjusting rod (7) is inserted into the head of the bolt (4) and positioned relative to the circumference. The other end of the adjusting rod (7) extends to the outside of the cover plate (6). The first plate (52) and the bolt (4) are located on the same horizontal plane.

3. The actively damped adjustable laser as described in claim 2, characterized in that: It also includes a mirror frame (8) and an electromagnetic induction damper (9), wherein, One end of the reflector frame (8) is connected to the swing arm (3), and the other end is used to install the reflector; The electromagnetic induction damper (9) includes a shielding cylinder (91) connected to the housing (1), a support (92) installed inside the shielding cylinder (91), an excitation coil (93) installed on the support (92), and a magnetic element (94) installed at the end of the swing arm (3).

4. The actively damped adjustable laser as described in claim 3, characterized in that: It also includes a control unit, which is configured to: output a real-time excitation current control signal to the electromagnetic induction damper (9) according to the preset target motion curve of the swing arm (3), so that the electromagnetic induction damper (9) generates a real-time controlled magnetic induction intensity, thereby making the damping torque of the swing arm (3) satisfy the following relationship: ； Wherein, KB is the magnetic field-current proportionality coefficient; I(t) is the real-time excitation current; v(t) is the real-time linear velocity of the swing arm (3) in m / s; and Larm is the damping arm, which is the distance from the rotating shaft (2) to the magnetic element (94).

5. The actively damped adjustable laser as described in claim 3, characterized in that: It also includes a control valve (10) disposed on the housing (1); The first flow channel (501) is provided with a branch and is connected to one port of the control valve (10); The second flow channel (502) is formed in a ring shape within the second plate (54); The second section (54) also has a third flow channel (503) which surrounds the second flow channel (502), and one port of the third flow channel (503) is connected to the other port of the control valve (10).

6. The actively damped adjustable laser as described in claim 5, characterized in that: It also includes a limiting post (11) and a connecting pipe (12), wherein, Two limiting posts (11) are provided on the housing (1), and the two limiting posts (11) are located opposite each other on both sides of the control valve (10); Two connecting pipes (12) are provided corresponding to the limiting post (11). A portion of the connecting pipe (12) is configured as a spiral tower-shaped part (121). The spiral tower-shaped part (121) is sleeved on the limiting post (11). The top end of the spiral tower-shaped part (121) is attached to the limiting post (11) and is connected to the port of the control valve (10). The bottom end of the spiral tower-shaped part does not contact the limiting post (11) and is connected to the first flow channel (501) or the third flow channel (503).

7. An application method of the actively damped adjustable laser as described in claim 5, characterized in that, Includes the following steps: S1. A piezoelectric ceramic is used as the actuator and is placed inside the laser cavity (101); S2. According to the ambient temperature, a liquid medium is introduced into the first flow channel (501) to regulate the temperature of the rotating shaft (2). After the laser continues to work and heats up, the heat of the liquid medium is reduced to maintain thermal balance. S3. Gas is introduced into the second flow channel (502) to drive the air cylinder (55) to expand and press against the inner wall of the arc groove (301) to adjust the frictional resistance. S4. Drive the swing arm (3) to swing through the driver to achieve laser tuning.

8. The application method of the actively damped adjustable laser as described in claim 7, characterized in that, It also includes the following steps: The fluid is regulated by the control valve (10) to enter the third flow channel (503) of the first plate (52), and the airflow temperature in the second flow channel (502) is regulated by the heat exchange of the swing arm (3), thereby regulating the temperature of the air expansion cylinder (55) to reduce the influence of temperature on the expansion coefficient of the air expansion cylinder (55).

9. A method for applying the actively damped adjustable laser as described in claim 4, characterized in that, Includes the following steps: P1, Preset the target motion curve of the swing arm (3); P2. Determine the real-time target linear velocity of the swing arm (3) during its movement according to the preset target motion curve of the swing arm (3); P3. Based on the real-time target linear velocity and according to the damping torque formula, the control unit calculates and generates a real-time excitation current control signal. P4. Output the excitation current control signal to the excitation coil (93). P5. The electromagnetic induction damper (9) generates a real-time damping torque related to the movement speed of the swing arm (3) according to the excitation current control signal, and drives the swing arm (3) to move according to the target motion curve.

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