Laser emitter power calibration device, laser emitter and laser treatment device

Abstract

The application provides a laser emitter power calibration device, a laser emitter and a laser treatment equipment, and relates to the technical field of laser emitters. The power calibration device comprises a first mirror group, a second mirror group, a third mirror group, a power detection unit and a control unit. The first mirror group is used for collimating the laser beam emitted by a laser light source. The second mirror group is used for reflecting and modulating the collimated light beam according to a control pattern loaded by the control unit. The third mirror group is used for focusing the modulated light beam to form a calibration output light beam. The power detection unit is used for detecting the output power of the calibration output light beam. The control unit is used for adjusting the control pattern according to the output power so that the output power meets a preset calibration condition. The application aims to improve the problems of complex debugging and poor stability of the mechanical light path alignment mode.

Description

Technical Field

[0001] This application relates to the field of laser emitter technology, and in particular to a laser emitter power calibration device, a laser emitter, and a laser therapy device. Background Technology

[0002] With the development of laser devices, fiber optic transmission technology, and medical optics technology, laser emitters are widely used in laser treatment equipment for dental care, skin treatment, physiotherapy, and other applications. These devices typically require collimating and focusing the laser light generated by the laser source before coupling it to a transmission fiber, which then transmits the light to the treatment output.

[0003] The coupling state between the laser beam and the transmission fiber directly affects the stability and consistency of the laser output power. In existing technologies, mechanical optical path alignment structures are typically used to achieve power coupling between the laser beam and the transmission fiber. While this method can improve the coupling efficiency of the laser beam entering the transmission fiber to some extent, it is highly dependent on the precision of the mechanical structure and assembly and debugging experience, and the debugging process is complex and time-consuming. Furthermore, the calibrated optical path state is easily affected by factors such as vibration, impact, thermal drift, and structural aging, leading to deviations and a decrease in output power stability. Summary of the Invention

[0004] The embodiments disclosed in this application provide a laser emitter power calibration device, a laser emitter, and a laser therapy device, which can improve the above-mentioned problems.

[0005] The embodiments of this application adopt the following technical solutions: In a first aspect, a laser emitter power calibration device is provided, comprising: a first mirror group, a second mirror group, a third mirror group, a power detection unit, and a control unit. The first mirror group is disposed on the light output path of the laser source and is used to receive the laser beam emitted from the laser source and collimate the laser beam to obtain a collimated beam. The second mirror group is disposed on the light output path of the first mirror group and is used to reflect and modulate the collimated beam under the action of a control pattern loaded by the control unit, so as to change at least one of the energy distribution, propagation direction, and wavefront distribution of the reflected beam. The third mirror group is disposed on the reflection optical path of the second mirror group and is used to focus the reflected beam after reflection and modulation by the second mirror group to form a calibration output beam. The power detection unit is disposed on the detection optical path corresponding to the calibration output beam and is used to detect the output power of the calibration output beam. The control unit is electrically connected to the second mirror group and the power detection unit respectively, and the control unit is used to adjust the control pattern loaded on the second mirror group according to the output power so that the output power of the calibration output beam meets the preset calibration conditions.

[0006] In one possible implementation of the first aspect, the first mirror group includes a fast-axis collimating mirror group and a slow-axis collimating mirror group arranged sequentially along the transmission direction of the laser beam. The fast-axis collimating mirror group is used to compress the divergence angle of the laser beam in the fast-axis direction, and the slow-axis collimating mirror group is used to compress the divergence angle of the laser beam in the slow-axis direction after it has been processed by the fast-axis collimating mirror group, so as to convert the laser beam into a collimated beam.

[0007] In one possible implementation of the first aspect, the second mirror group includes a digital micromirror device, which includes a micromirror array. The micromirror array includes multiple independently deflectable micromirror units, each of which is used to switch to a corresponding deflection state according to a control pattern in order to selectively reflect and modulate the collimated beam incident on the digital micromirror device.

[0008] In one possible implementation of the first aspect, the control pattern includes a binary phase diagram; The control unit is used to iteratively update at least a portion of the patterned regions in the binary phase diagram based on the output power fed back by the power detection unit, so that the calibrated output beam after being focused by the third mirror group matches the preset output spot conditions.

[0009] In one possible implementation of the first aspect, the third lens group includes a first focusing lens and a second focusing lens, which are arranged sequentially along the reflected light path of the second lens group. The first focusing lens is used to pre-focus the reflected beam after it has been reflected and modulated by the second lens group to form an intermediate focused beam. The second focusing lens is used to perform secondary focusing on the intermediate focused beam to form a calibration output beam that matches a preset output end.

[0010] In one possible implementation of the first aspect, the laser emitter power calibration device further includes a storage unit; the storage unit is electrically connected to the control unit, and the storage unit is used to store the target control pattern determined by the control unit during the calibration process and the calibration parameters corresponding to the target control pattern. The control unit is also used to read the target control pattern from the storage unit when the laser emitter enters the working mode, and load the target control pattern into the second mirror group.

[0011] In one possible implementation of the first aspect, the calibration parameters include at least one of calibration output power, calibration time, calibration mode identifier, and calibration status identifier. The control unit is used to determine the effective state of the target control pattern according to the calibration parameters, and when the target control pattern is in an effective state, load the target control pattern into the second mirror group.

[0012] In one possible implementation of the first aspect, the control unit is specifically configured to: acquire a first output power detected by the power detection unit when the second mirror group loads the current control pattern. According to the preset pattern adjustment strategy, at least a portion of the pattern region in the current control pattern is adjusted to generate a candidate control pattern. The candidate control pattern is then loaded onto the second mirror group. The second output power detected by the power detection unit when the candidate control pattern is loaded onto the second mirror group is obtained. If the second output power is greater than the first output power, the candidate control pattern is determined as the new current control pattern. If the second output power is less than or equal to the first output power, the current control pattern is maintained, and a new candidate control pattern is generated according to the preset pattern adjustment strategy. The process of generating, loading, and comparing the output power of the candidate control pattern is repeated until the output power of the calibration output beam meets the preset calibration conditions.

[0013] In a second aspect, a laser emitter is provided, comprising a laser source and a laser emitter power calibration device. The laser source is used to emit a laser beam, and the laser emitter power calibration device is used to perform power calibration processing on the laser beam so that the laser emitter outputs a calibrated laser that meets preset power conditions. The laser emitter power calibration device includes the laser emitter power calibration device as described in any of the first aspects.

[0014] Thirdly, a laser therapy device is provided, including a laser emitter, a transmission optical fiber, and a treatment output device, wherein the input end of the transmission optical fiber is optically coupled to the output end of the laser emitter, and the treatment output device is optically coupled to the output end of the transmission optical fiber; wherein the laser emitter includes the laser emitter as described in the second aspect. Attached Figure Description

[0015] Figure 1 A schematic diagram of a laser emitter power calibration device provided in this application embodiment; Figure 2 A schematic diagram of the calibration process of a laser emitter power calibration device provided in this application embodiment; Figure 3 A schematic diagram of a laser emitter module provided in an embodiment of this application; Figure 4 This is a schematic diagram of a laser therapy device provided in an embodiment of this application. Detailed Implementation

[0016] The technical solutions in some embodiments of this application will be clearly and completely described below with reference to the figures. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application are within the scope of protection of this application.

[0017] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "exemplary," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, a particular feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0018] In describing some embodiments, the term "coupled" and its derivative expressions may be used. For example, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact; in this case, "coupled" can also be described as "connected." Furthermore, the term "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0019] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0020] "A and / or B" includes three combinations: A only, B only, and a combination of A and B. The use of "applies to" or "configured to" in this document implies open and inclusive language, which does not preclude applicability to or configuration to perform additional tasks or steps on devices. Additionally, the use of "based on" implies openness and inclusiveness, because processes, steps, calculations, or other actions "based on" one or more conditions or values ​​can in practice be based on additional conditions or values ​​beyond those conditions.

[0021] The use of “configured as” in this article implies an open and inclusive language that does not exclude the applicability to or configuration of devices to perform additional tasks or steps.

[0022] With the development of laser devices, fiber optic transmission technology, and precision optical control technology, laser emitters have been widely used in medical treatment, dental care, physiotherapy equipment, industrial processing, and testing and analysis. In these applications, laser emitters typically need to collimate, shape, and focus the laser beam generated by the laser source before outputting it to a transmission fiber, which then transmits the laser to the treatment, processing, or testing end. For laser treatment equipment, the power stability of the output laser directly affects the consistency of treatment energy and the safety of equipment use; for fiber optic transmission laser systems, the beam coupling state from the laser source to the fiber input also directly affects the final output power and power fluctuations. Therefore, during factory testing, maintenance, and long-term operation, the output power of the laser emitter usually needs to be calibrated to ensure that the output laser meets the preset power requirements.

[0023] In practical applications, the emitted beams of laser sources such as semiconductor lasers are often not ideally collimated due to factors such as packaging structure, divergence angle, beam shape, temperature variations, and device aging. When these beams are transmitted through optical mirrors to the fiber optic endface or output detection end, coupling losses can easily occur due to factors such as beam propagation direction deviation, uneven energy distribution, focal point changes, or wavefront distortion. Especially in laser therapy equipment, the laser emitter typically needs to guide the therapeutic laser to the output device via a transmission fiber. If the matching relationship between the beam and the fiber endface changes, the laser power received by the transmission fiber will deviate from the calibrated value, thus affecting the output consistency of the therapeutic laser. Therefore, the power calibration of the laser emitter involves not only the control of the laser source's own emission power but also multiple aspects in the optical transmission path, including collimation, reflection modulation, focusing, and output power feedback.

[0024] In related technologies, a feasible implementation method is to use a mechanical optical path alignment structure to achieve power coupling between the laser beam and the transmission fiber. Specifically, a multi-dimensional precision adjustment mechanism can be set between the semiconductor laser diode, collimating lens, focusing lens, and the end face of the transmission fiber. By using a translation stage, rotation stage, manual adjustment knob, or piezoelectric drive mechanism, the relative positions of the laser source, optical lens group, and fiber end face can be adjusted so that the laser beam and the end face of the transmission fiber satisfy a coaxial relationship and imaging matching relationship, thereby improving the coupling efficiency of the laser beam entering the transmission fiber and reducing the power attenuation between the laser port and the working end.

[0025] As an example, the output end of the laser transmitter can be equipped with an SMA905 fiber optic connector, and the input end of the transmission fiber can be connected to the output end of the laser transmitter via the SMA905 fiber optic connector. The SMA905 fiber optic connector can be used to fix the input end of the transmission fiber and position the end face of the transmission fiber at the preset focal point or preset coupling position of the focusing lens to receive the laser beam processed by the collimating lens and focusing lens. During assembly or debugging, it is usually necessary to repeatedly adjust the relative positions of the semiconductor laser diode, collimating lens, focusing lens, and SMA905 fiber optic connector using a mechanical adjustment mechanism to match the focused beam spot with the end face of the transmission fiber.

[0026] However, this mechanical optical path alignment method is highly dependent on the precision of the mechanical structure and assembly and debugging experience, and the calibration process is complex and time-consuming. Furthermore, the calibrated optical path is easily affected by factors such as vibration, impact, thermal drift, and structural aging, leading to deviations and a decrease in coupling efficiency. In addition, the multi-dimensional precision adjustment mechanism is complex in structure and occupies a large space, which is not conducive to the miniaturization design of laser emitters and makes it difficult to dynamically compensate for laser source aging or changes in beam parameters.

[0027] To address the aforementioned issues, this application provides a laser emitter power calibration device. A first mirror group collimates the laser beam, a second mirror group, under the control of a control pattern loaded by a control unit, electronically reflects and modulates the collimated beam, and a third mirror group focuses the modulated beam for output. Simultaneously, a power detection unit detects the output power of the calibrated beam, and the control unit adjusts the control pattern loaded on the second mirror group based on the output power feedback, ensuring that the output power of the calibrated beam meets preset calibration conditions. Thus, this application transforms the traditional method of optical path alignment, which relies on mechanical structures such as translation stages and rotary stages, into an electronic beam modulation method based on control patterns. This reduces the reliance on assembly precision and manual experience for mechanical adjustments and improves the automation and long-term stability of laser emitter power calibration.

[0028] The following describes the specific structure, layout, and working process of the laser emitter power calibration device. (See reference...) Figure 1The laser emitter power calibration device 100 may include a first mirror group 110, a second mirror group 120, a third mirror group 130, a power detection unit 140, and a control unit 150. The first mirror group 110, the second mirror group 120, and the third mirror group 130 may be arranged sequentially along the transmission direction of the laser beam to form the main optical path of the laser emitter power calibration device 100; the power detection unit 140 may be disposed on the detection optical path corresponding to the calibration output beam formed by the third mirror group 130; the control unit 150 may be disposed on one side of the main optical path and electrically connected to the second mirror group 120 and the power detection unit 140 respectively to form an electronic adjustment link based on output power feedback.

[0029] As one feasible implementation, the laser emitter power calibration device can have a calibration input and a calibration output. The calibration input can be used to couple the optical path of the laser source's output end to receive the laser beam emitted by the laser source. The laser source can be a semiconductor laser diode or other laser device capable of outputting a laser beam to be calibrated. The calibration output can be used to couple the collimated, reflected, modulated, and focused calibration output beam to the transmission fiber, which can be mounted on a fiber optic mounting base.

[0030] Specifically, the first mirror group can be positioned close to the calibration input of the laser emitter power calibration device and located on the output path of the laser source. The first mirror group receives the diverging laser beam emitted from the laser source and collimates it, ensuring that the laser beam entering the subsequent modulation path forms a collimated or nearly collimated beam. Thus, the first mirror group can serve as a pre-stage beam shaping structure between the laser source and the second mirror group, improving the stability and modulatory properties of the beam incident on the second mirror group.

[0031] The second mirror group can be positioned on the light-emitting side of the first mirror group and located on the propagation path of the collimated beam output by the first mirror group. Under the control pattern loaded by the control unit, the second mirror group is used to perform reflection modulation on the collimated beam to adjust at least one of the energy distribution, propagation direction, and wavefront distribution of the reflected beam. As a feasible implementation, the second mirror group may include a digital micromirror device. Multiple micromirror units in the digital micromirror device can switch to corresponding deflection states according to the control pattern, thereby transforming the beam adjustment process from traditional mechanical displacement adjustment to electronic reflection modulation. In other words, this application does not primarily rely on mechanical mechanisms such as translation stages or rotation stages to change the position of optical elements, but rather changes the beam state by altering the control pattern of the second mirror group, thereby achieving power calibration.

[0032] The third mirror group can be positioned on the reflected light path of the second mirror group and located on the output side of the second mirror group. The third mirror group receives the reflected beam modulated by the second mirror group and focuses it to form a calibration output beam. The third mirror group can focus the calibration output beam onto the input end face of the transmission fiber, the fiber end face in the fiber optic mount, or a preset detection position, ensuring that the modulated beam enters the subsequent optical path in a state that meets preset output conditions. Thus, the first, second, and third mirror groups sequentially constitute a calibration path consisting of collimation processing, electronic modulation, and focused output.

[0033] The power detection unit can be positioned on the detection optical path corresponding to the calibration output beam. As one feasible implementation, the power detection unit can be positioned at the output end of the transmission fiber to detect the optical power output after passing through the transmission fiber; it can also be positioned at a detection location after the calibration output end to directly detect the power of the calibration output beam output by the third mirror group; or it can receive the detection component in the calibration output beam through a beam splitter to obtain output power information without affecting the main output optical path. The output power detected by the power detection unit can be fed back to the control unit to characterize the beam coupling state or output power state under the current control pattern.

[0034] The control unit can be electrically connected to both the second mirror group and the power detection unit. The control unit loads a control pattern onto the second mirror group and receives the output power feedback from the power detection unit. If the current output power does not meet the preset calibration conditions, the control unit can adjust the control pattern loaded onto the second mirror group, changing the reflection modulation state of the second mirror group and thus altering the output power of the calibrated output beam. By repeatedly performing control pattern adjustments and power feedback judgments, the control unit can determine a target control pattern that matches the current laser beam state, enabling the laser emitter power calibration device to output a calibrated output beam that meets the preset calibration conditions.

[0035] Since the laser beam emitted from a semiconductor laser diode typically exhibits elliptical spot characteristics and differs in divergence angles along the fast and slow axes, directly incidenting this laser beam onto the second mirror group can easily lead to instability in the beam size, incident angle, and energy distribution received by the second mirror group, thereby affecting subsequent reflection modulation and focusing output effects. Therefore, this application collimates the laser beam using the first mirror group, transforming it from an elliptical diverging beam into a collimated elliptical beam or an approximately collimated elliptical beam, thus providing a stable incident beam basis for the electronic reflection modulation of the second mirror group.

[0036] In one feasible implementation, the first mirror group may include a fast-axis collimating mirror group and a slow-axis collimating mirror group arranged sequentially along the propagation direction of the laser beam. The fast-axis collimating mirror group can be positioned close to the output end of the laser emitter to compress the divergence angle of the laser beam in the fast-axis direction; the slow-axis collimating mirror group can be positioned on the output side of the fast-axis collimating mirror group to compress the divergence angle of the laser beam processed by the fast-axis collimating mirror group in the slow-axis direction, thereby converting the laser beam into a collimated beam. Thus, the first mirror group can perform split-axis collimation based on the large fast-axis divergence angle and small slow-axis divergence angle of the semiconductor laser diode, enabling the collimated laser beam to be incident on the second mirror group with a more stable spot size and propagation direction.

[0037] As an example, the first lens group may include a first collimating lens and a second collimating lens. The first collimating lens may be a fast-axis collimator (FAC) with a focal length of approximately 0.5 mm, and the second collimating lens may be a slow-axis collimator (SAC) with a focal length of approximately 2 mm. The fast-axis and slow-axis collimating lenses can be installed sequentially along the propagation direction of the laser beam to first collimate the laser beam along its fast axis and then collimate it along its slow axis, thereby collimating the elliptical diverging beam emitted from the semiconductor laser diode into a collimated elliptical beam with a diameter of approximately 2 mm.

[0038] The second mirror group can be used to electronically reflect and modulate the collimated beam output from the first mirror group. Specifically, the second mirror group can be positioned on the light-emitting side of the first mirror group and located on the propagation path of the collimated beam. The control unit can load a control pattern onto the second mirror group, causing the second mirror group to change its reflection modulation state according to the control pattern, thereby selectively reflecting the collimated beam incident on the second mirror group to adjust at least one of the propagation direction, energy distribution, and wavefront distribution of the reflected beam. Thus, the second mirror group can transform the traditional optical path fine-tuning process relying on mechanical displacement into an electronic beam modulation process based on a control pattern, thereby providing a modulation basis for the subsequent focusing of the third mirror group to form a calibrated output beam that meets preset calibration conditions.

[0039] In one feasible implementation, the second mirror group includes a Digital Micromirror Device (DMD). The DMD includes a micromirror array comprising multiple independently deflectable micromirror units. Each micromirror unit can switch to a corresponding deflection state under the control of a control pattern loaded by the control unit, causing the light beam incident on different micromirror units to be reflected in the corresponding direction. In other words, the control unit can control the deflection state of the corresponding micromirror unit in the micromirror array by changing the state of different pattern regions in the control pattern, thus enabling the second mirror group to form different reflection modulation results when aligned with a straight beam.

[0040] As an example, the second mirror assembly may include a digital micromirror imager (DMI). The DMI may be 0.55 inches in size, with micromirror units within it measuring 10.8 μm and deflection angles of ±12°. During assembly, the surface normal of the DMI can be set at a preset angle relative to the incident optical axis. For example, the surface normal may be set at a 24° angle to the incident optical axis, ensuring that the collimated beam incident on the DMI satisfies the reflection condition where the incident angle and reflection angle match.

[0041] When the micromirror unit is in the on state, it can deflect in the first deflection direction, causing the corresponding reflected light to enter the third mirror group along a preset outgoing optical axis. When the micromirror unit is in the off state, it can deflect in the second deflection direction, causing the corresponding reflected light to deviate from the incident optical path of the third mirror group. Thus, the second mirror group can selectively conduct or suppress beam components in different spatial regions of the aligned beam based on the on / off state of the micromirror array.

[0042] The control pattern can be used to characterize the operating state of multiple reflection modulation regions in the second mirror group. Specifically, when the second mirror group includes a digital micromirror device (DMM), the control pattern can include a binary phase diagram, where different pattern units in the binary phase diagram can correspond to different micromirror units or groups of micromirror units in the DMM. A first state value in the binary phase diagram can be used to control the corresponding micromirror unit to be in an "on" state, causing the light beam component incident on that micromirror unit to be reflected along a preset emission direction; a second state value in the binary phase diagram can be used to control the corresponding micromirror unit to be in an "off" state, causing the light beam component incident on that micromirror unit to deviate from the preset emission direction. Thus, the control unit can change the spatial reflection modulation result of the second mirror group aligning with the straight beam by changing the state of different pattern regions in the binary phase diagram.

[0043] During calibration, the control unit first loads an initial binary phase map onto the second mirror group and obtains the output power fed back by the power detection unit. Subsequently, the control unit can perform state flipping, region replacement, or local perturbation on certain pattern regions in the binary phase map according to a preset optimization strategy to generate candidate binary phase maps, which are then loaded onto the second mirror group. The power detection unit detects the output power of the second mirror group after loading the candidate binary phase maps and feeds the detection result back to the control unit. The control unit determines whether to retain the candidate binary phase map based on a comparison between the output power corresponding to the candidate binary phase map and the output power corresponding to the current binary phase map. Through multiple iterative updates, the control unit can gradually determine the target binary phase map that can improve the output power or make the output power meet a preset range.

[0044] Furthermore, the preset output spot conditions may include at least one of the following: spot position conditions, spot size conditions, spot energy distribution conditions, and fiber end-face matching conditions. By iteratively updating the binary phase diagram, the beam reflected and modulated by the second mirror group can form a calibrated output beam that meets the preset output spot conditions under the focusing action of the third mirror group, allowing more effective beams to couple to the transmission fiber or be incident on the preset detection position. In this way, beam alignment and spot matching no longer mainly rely on mechanical adjustment frames to change the position of optical elements, but are achieved by the control unit through electronic updates of the binary phase diagram, thereby improving the automation level and long-term stability of the power calibration process.

[0045] The third mirror group is used to focus the reflected beam modulated by the second mirror group to form a calibrated output beam. The third mirror group can be positioned in the reflected light path of the second mirror group, at a preset distance from it. This preset distance can be determined based on the effective reflection area of ​​the second mirror group, the exit angle of the reflected beam, the focal length of the third mirror group, and the position of the preset output end. For example, the third mirror group can be positioned approximately one focal length away from the second mirror group in its reflected light path, allowing the reflected beam modulated by the second mirror group to enter the effective light-passing area of ​​the third mirror group and be converged to the preset output end by the third mirror group.

[0046] In one feasible implementation, the third lens group may include a first focusing lens and a second focusing lens. The first focusing lens and the second focusing lens may be arranged sequentially along the reflected light path of the second lens group; the first focusing lens is used to pre-focus the reflected beam after it has been reflected and modulated by the second lens group to form an intermediate focused beam; the second focusing lens is used to perform secondary focusing on the intermediate focused beam to form a calibration output beam that matches a preset output end.

[0047] As an example, the first and second focusing lenses can be focusing lenses with concave surfaces facing each other. That is, the side of the first focusing lens facing the second focusing lens can have a first concave surface, and the side of the second focusing lens facing the first focusing lens can have a second concave surface, with the first and second concave surfaces facing each other. Through this relative arrangement, a lens gap space can be formed between the first and second focusing lenses to adjust the transmission state of the intermediate focused beam. This allows the reflected beam to be initially focused by the first focusing lens, and then refocused and output matched by the second focusing lens. This enables the calibration output beam to be incident on the input end face of the transmission optical fiber or the power detection position with a preset spot size and incident angle.

[0048] The above embodiments have provided a detailed description of the overall structure, optical path layout, and connection relationships between the functional units of the laser emitter power calibration device. The calibration control process of the laser emitter power calibration device will be described below. (See also...) Figure 2 As shown, the calibration control process can include a hardware fixing process in stage one and a calibration mode process in stage two. The hardware fixing process is mainly used to complete the coarse positioning and rigid fixation of optical components such as laser source, fast-axis collimator, slow-axis collimator, digital micromirror device, focusing lens, and fiber optic mount. The calibration mode process is mainly used to load the initial control pattern through the control unit and iteratively adjust the control pattern based on the power detection results, so that the output power of the calibration output beam gradually meets the preset calibration conditions.

[0049] In the hardware fixing process of Phase One, the laser source, fast-axis collimating lens, slow-axis collimating lens, digital micromirror device (DMM), focusing lens, and fiber optic mount can be arranged according to a preset optical path. After coarse positioning, they are rigidly fixed using UV-curing adhesive, mechanical clamps, fixing brackets, or other fixing structures. It should be noted that this phase is mainly used to establish the basic optical path, ensuring that the laser beam emitted from the laser source can be processed by the fast-axis and slow-axis collimating lenses before entering the effective modulation area of ​​the DMM, and that the beam reflected by the DMM can enter the effective light-passing area of ​​the focusing lens. This phase does not require repeated precision adjustments to each optical element through multi-dimensional mechanical adjustment mechanisms; it only needs to ensure that the beam can complete basic transmission along the preset optical path. Therefore, this application transforms the traditional precision alignment process relying on mechanical adjustment frames into a calibration method that combines early coarse positioning and subsequent electronically controlled pattern adjustment.

[0050] During the second-stage calibration process, the control unit first controls the laser source to emit light at a calibration power lower than its operating power, resulting in a low-power laser beam for calibration. This low-power laser beam is collimated by the first mirror group and then incident on the second mirror group. The control unit can load an initial control pattern onto the second mirror group. This initial control pattern can be a random pattern or a pattern that ensures multiple reflection modulation units in the second mirror group are fully activated. Under the influence of the initial control pattern, the second mirror group reflects and modulates the collimated beam, and the third mirror group focuses the reflected and modulated beam to form the corresponding calibration output beam.

[0051] Subsequently, the power detection unit can detect the output power of the calibration output beam under the current control pattern and feed the detected current output power back to the control unit. The control unit can use this current output power as a comparison benchmark in the subsequent pattern adjustment process. Next, the control unit enters the adaptive optimization process and adjusts the current control pattern according to a preset pattern adjustment strategy to generate candidate control patterns. As an example, the control pattern can be a binary phase diagram, and the pattern adjustment can include randomly perturbing, state flipping, or locally replacing a portion of the pattern region in the binary phase diagram, thereby changing the reflection state of the corresponding reflection modulation unit in the second mirror group.

[0052] After the candidate control pattern is loaded into the second mirror group, the second mirror group performs new reflection modulation on the aligned beam based on the candidate control pattern. The third mirror group focuses the new reflected beam to form a candidate calibration output beam. The power detection unit detects the candidate output power corresponding to the candidate calibration output beam and feeds the candidate output power back to the control unit. The control unit compares the candidate output power with the current output power. When the candidate output power is greater than the current output power, it indicates that the reflection modulation state corresponding to the candidate control pattern can improve the effective output power of the calibration output beam. The control unit can accept this update and determine the candidate control pattern as the new current control pattern. When the candidate output power is less than or equal to the current output power, it indicates that this adjustment has not improved the output power. The control unit can maintain the original current control pattern and continue to generate new candidate control patterns according to the preset pattern adjustment strategy.

[0053] The control unit can repeatedly execute the processes of generating, loading, detecting power, and comparing power of candidate control patterns until the output power of the calibrated output beam reaches a preset power threshold, falls within a preset power range, or the change in output power is less than a preset convergence threshold. Through the calibration mode of the second stage described above, the control unit can use the output power fed back by the power detection unit as an evaluation criterion to iteratively optimize the control pattern loaded onto the second mirror group, so that the calibrated output beam focused by the third mirror group gradually matches the preset output end, thereby achieving power calibration based on electronic control patterns.

[0054] Using the above method, this application eliminates the need to rely on mechanical structures such as translation stages and rotation stages to repeatedly adjust the position of optical components. Instead, it achieves beam alignment and power calibration through power detection feedback and iterative updates of the control pattern. Even if the laser source experiences changes in beam parameters due to temperature variations, aging, or assembly errors, the control unit can re-enter the calibration mode and update the control pattern based on output power feedback to ensure that the calibrated output beam once again meets the preset calibration conditions.

[0055] To facilitate the storage of control data generated during the calibration process, in one feasible embodiment, the laser emitter power calibration device further includes a storage unit; the storage unit is electrically connected to the control unit; the storage unit is used to store the target control pattern determined by the control unit during the calibration process and the calibration parameters corresponding to the target control pattern.

[0056] For further examples, please refer to [link / reference]. Figure 1 The laser emitter power calibration device 100 also includes a storage unit 160. The storage unit 160 is electrically connected to the control unit 150 and is used to store the target control pattern determined by the control unit 150 during the calibration process, as well as the calibration parameters corresponding to the target control pattern. The target control pattern can be a control pattern determined by the control unit 150 after iteratively adjusting the control pattern applied to the second mirror group 120 based on the output power fed back by the power detection unit 140.

[0057] Calibration parameters may include at least one of the following: calibration output power, calibration time, calibration mode identifier, calibration status identifier, laser source drive parameters, and ambient temperature parameters. By setting up a storage unit, the target control pattern and corresponding calibration parameters determined by the control unit can be centrally stored, thereby providing a data foundation for parameter management, status recording, and subsequent operational status configuration of the laser emitter power calibration device.

[0058] The optimal control pattern determined during calibration can be permanently saved through the storage unit, ensuring that the calibration results are not lost due to power outages, restarts, or changes in operating modes. Specifically, after initial digital alignment, the control unit can write the target control pattern that ensures the output power meets preset calibration conditions into the storage unit. When the laser emitter enters normal operating mode, the control unit can read the target control pattern from the storage unit and load it into the second mirror group. This causes the second mirror group to modulate the laser beam according to the calibrated reflection modulation state, thereby maintaining a superior spot matching state at the preset output end of the focused beam.

[0059] For further examples, please refer to [link / reference]. Figure 2In Phase Three, after the calibration mode ends, the control unit can write the target control pattern determined in Phase Two and the corresponding calibration parameters into the storage unit. The target control pattern can be the control pattern that causes the candidate output power to reach the preset calibration conditions, or the control pattern that results in the highest output power or output power variation satisfying the convergence condition during multiple iterations. The calibration parameters can include at least one of the following: output power corresponding to the target control pattern, calibration time, calibration mode identifier, calibration status identifier, and laser source driving parameters. By associating and storing the target control pattern with the corresponding calibration parameters, the control unit can record and manage the calibration results.

[0060] In one feasible implementation, the storage unit can be a non-volatile memory. After the control unit writes the target control pattern into the non-volatile memory, the target control pattern can still be saved even if the laser emitter power calibration device experiences a power outage, restart, or switches from calibration mode to operating mode. This avoids re-executing the complete control pattern search process before each entry into operating mode, thus improving the startup efficiency and operational stability of the laser emitter.

[0061] In Phase Four, after the laser emitter enters normal operating mode, the control unit can read the target control pattern saved in Phase Three from the storage unit and load it into the second mirror group. At this time, the laser source can emit light according to the operating power. The first mirror group collimates the laser beam, the second mirror group reflects and modulates the collimated beam based on the target control pattern, and the third mirror group focuses the reflected and modulated beam to output a calibration laser that meets the preset calibration conditions. In other words, in operating mode, the second mirror group no longer needs to perform a full search starting from the initial control pattern, but directly uses the stored target control pattern to keep the calibration output beam matching the preset output state.

[0062] Furthermore, when the laser emitter requires periodic self-calibration, the control unit can use the target control pattern stored in the storage unit as the initial pattern for local adjustments, without needing to reload the random control pattern for a global search. In this way, when the laser source ages, experiences temperature changes, or exhibits minor optical path drift, the target control pattern can be quickly updated based on existing calibration results, thereby compensating for slow changes in output power and ensuring a relatively stable power output for the laser emitter during long-term use.

[0063] The laser emitter power calibration device provided in this application collimates the laser beam emitted from the laser emitter using a first mirror group. A second mirror group, under the control of a control pattern loaded by a control unit, performs electronic reflection modulation on the collimated beam. A third mirror group focuses the reflected and modulated beam for output. Simultaneously, a power detection unit detects the output power of the calibrated output beam, and the control unit iteratively adjusts the control pattern loaded on the second mirror group based on the output power feedback, ensuring that the output power of the calibrated output beam meets preset calibration conditions. Therefore, this application transforms the traditional power calibration method, which relies on translation stages, rotation stages, or mechanical adjustment frames to change the relative positions of optical elements, into an electronic beam modulation method based on control patterns. This reduces the impact of mechanical vibration, thermal drift, structural wear, and assembly errors on the optical path alignment, lowers the reliance on manual experience and mechanical adjustment precision in the calibration process, and improves the automation level, output power stability, and long-term adaptability of the laser emitter power calibration. Furthermore, with the storage unit set up, the target control pattern and corresponding calibration parameters determined during the calibration process can be saved, providing a data basis for subsequent working status configuration, calibration result reproduction, and rapid compensation after light source aging, thereby enabling the laser emitter to maintain a relatively stable output power during long-term use.

[0064] This application also provides a laser emitter, see embodiments thereof. Figure 3 The laser emitter 300 may include a laser source 200 and a laser emitter power calibration device 100. The laser source 200 emits a laser beam, and the laser emitter power calibration device 100 is disposed on the output side of the laser source 200. It receives the laser beam emitted from the laser source 200 and performs power calibration on the laser beam to ensure that the laser emitter outputs a calibrated laser that meets preset power conditions. The laser emitter power calibration device 100 may include any of the laser emitter power calibration devices described in the above embodiments.

[0065] Specifically, the laser source can be optically coupled to the calibration input of the laser emitter power calibration device, and the calibration output of the laser emitter power calibration device can serve as the output of the laser emitter, or be optically coupled to the output of the laser emitter. The laser beam emitted from the laser source first enters the laser emitter power calibration device, and then sequentially undergoes collimation processing by the first mirror group, electronic reflection modulation by the second mirror group, and focusing processing by the third mirror group to form a calibration laser. The power detection unit can detect the output power corresponding to the calibration output beam, and the control unit can adjust the control pattern applied to the second mirror group according to the output power, so that the calibration laser output by the laser emitter meets the preset power conditions. Thus, the laser emitter can achieve automatic calibration and stable output of laser output power while reducing dependence on mechanical optical path adjustment.

[0066] As an example, the laser source can be a semiconductor laser diode, a solid-state laser, a fiber laser, or other laser devices capable of outputting a laser beam to be calibrated. When the laser source is a semiconductor laser diode, the laser beam emitted typically exhibits different divergence characteristics along the fast and slow axes. The laser emitter power calibration device can perform split-axis collimation on the laser beam using a first mirror group, and then electronically modulate the collimated beam using a second mirror group, ensuring that the calibration laser, after being focused by a third mirror group, meets the preset power conditions. The document also describes a scheme where the beam emitted from the semiconductor laser diode is coupled to an optical fiber after passing through a fast-axis collimating mirror, a slow-axis collimating mirror, a digital micromirror device, and a focusing lens.

[0067] This application also provides a laser therapy device, see reference. Figure 4 The laser therapy device 400 may include a laser emitter 300, a transmission optical fiber 301, and a treatment output device 302; the input end of the transmission optical fiber 301 is optically coupled to the output end of the laser emitter 300, and the treatment output device 302 is optically coupled to the output end of the transmission optical fiber 301. The laser emitter 300 may be the laser emitter 300 described in the above embodiment.

[0068] Specifically, the laser emitter generates a therapeutic laser that meets preset power conditions. The transmission fiber receives the therapeutic laser output from the laser emitter and transmits it to the treatment output device. The treatment output device receives the therapeutic laser transmitted via the transmission fiber and outputs it to the target treatment site. Thus, the laser therapy equipment can use a laser emitter power calibration device within the laser emitter to calibrate the power of the laser before it enters the transmission fiber, ensuring a more stable input power for the therapeutic laser received by the transmission fiber, thereby improving the power consistency at the treatment output end.

[0069] As an example, the treatment output device may include at least one of a treatment handpiece, a treatment probe, a fiber optic output head, a dental treatment head, and an optical output component for guiding the therapeutic laser to the target treatment site. The transmission fiber may be a multimode fiber suitable for transmitting the therapeutic laser or other medical-grade fiber. The laser treatment device may be a dental treatment device, a skin treatment device, a physiotherapy device, or other device that utilizes lasers for treatment. Through the above configuration, a complete therapeutic laser transmission path is formed between the laser transmitter, the transmission fiber, and the treatment output device. The therapeutic laser output from the laser transmitter is transmitted via the transmission fiber and then applied to the target treatment site by the treatment output device, thereby meeting the requirements of laser treatment devices for output power stability and transmission reliability.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical parameters in the formula. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A laser emitter power calibration device, characterized in that, include: The system comprises a first mirror group, a second mirror group, a third mirror group, a power detection unit, and a control unit. The first mirror group is disposed on the light output path of the laser source and is used to receive the laser beam emitted by the laser source and to collimate the laser beam to obtain a collimated beam. The second mirror group is disposed on the light output path of the first mirror group and is used to reflect and modulate the collimated beam under the control pattern loaded by the control unit, so as to change at least one of the energy distribution, propagation direction and wavefront distribution of the reflected beam. The third mirror group is disposed on the reflected light path of the second mirror group and is used to focus the reflected beam after it has been reflected and modulated by the second mirror group to form a calibrated output beam. The power detection unit is disposed on the detection optical path corresponding to the calibration output beam and is used to detect the output power of the calibration output beam. The control unit is electrically connected to the second mirror group and the power detection unit respectively. The control unit is used to adjust the control pattern loaded onto the second mirror group according to the output power so that the output power of the calibration output beam meets the preset calibration conditions.

2. The laser emitter power calibration device according to claim 1, characterized in that, The first mirror group includes a fast-axis collimating mirror group and a slow-axis collimating mirror group arranged sequentially along the transmission direction of the laser beam; The fast-axis collimating lens group is used to compress the divergence angle of the laser beam in the fast-axis direction; The slow-axis collimating lens group is used to compress the divergence angle of the laser beam processed by the fast-axis collimating lens group in the slow-axis direction, so as to convert the laser beam into the collimated beam.

3. The laser emitter power calibration device according to claim 1, characterized in that, The second mirror assembly includes a digital micromirror device; The digital micromirror device includes a micromirror array, which includes multiple independently deflectable micromirror units. Each of the micromirror units is used to switch to the corresponding deflection state according to the control pattern in order to selectively reflect and modulate the collimated beam incident on the digital micromirror device.

4. The laser emitter power calibration device according to claim 3, characterized in that, The control pattern includes a binary phase diagram; The control unit is used to iteratively update at least a portion of the patterned regions in the binary phase diagram based on the output power fed back by the power detection unit, so that the calibrated output beam focused by the third mirror group matches the preset output spot conditions.

5. The laser emitter power calibration device according to claim 1, characterized in that, The third lens group includes a first focusing lens and a second focusing lens; The first focusing lens and the second focusing lens are arranged sequentially along the reflected light path of the second lens group; The first focusing lens is used to pre-focus the reflected beam after it has been reflected and modulated by the second lens group to form an intermediate focused beam; The second focusing lens is used to perform secondary focusing on the intermediate focusing beam to form the calibration output beam that matches the preset output end.

6. The laser emitter power calibration device according to claim 1, characterized in that, The laser emitter power calibration device also includes a storage unit; The storage unit is electrically connected to the control unit; The storage unit is used to store the target control pattern determined by the control unit during the calibration process and the calibration parameters corresponding to the target control pattern. The control unit is also configured to read the target control pattern from the storage unit and load the target control pattern into the second mirror group when the laser emitter enters the working mode.

7. The laser emitter power calibration device according to claim 6, characterized in that, The calibration parameters include at least one of calibration output power, calibration time, calibration mode identifier, and calibration status identifier; The control unit is used to determine the effective state of the target control pattern according to the calibration parameters, and when the target control pattern is in an effective state, load the target control pattern into the second mirror group.

8. The laser emitter power calibration device according to claim 1, characterized in that, The control unit is specifically used for: Obtain the first output power detected by the power detection unit when the second mirror group loads the current control pattern; According to a preset pattern adjustment strategy, at least a portion of the pattern regions in the current control pattern are state-adjusted to generate candidate control patterns, and the candidate control patterns are loaded into the second mirror group. Obtain the second output power detected by the power detection unit when the second mirror group loads the candidate control pattern; If the second output power is greater than the first output power, the candidate control pattern is determined as the new current control pattern; If the second output power is less than or equal to the first output power, the current control pattern is maintained, and a new candidate control pattern is generated according to the preset pattern adjustment strategy. The process of generating, loading, and comparing the output power of the candidate control pattern is repeated until the output power of the calibrated output beam meets the preset calibration conditions.

9. A laser emitter, characterized in that, This includes the laser source and the laser emitter power calibration device; The laser source is used to emit a laser beam; The laser transmitter power calibration device is used to perform power calibration processing on the laser beam so that the laser transmitter outputs a calibrated laser that meets preset power conditions, wherein the laser transmitter power calibration device includes the laser transmitter power calibration device as described in any one of claims 1 to 8.

10. A laser therapy device, characterized in that, Includes laser emitter, transmission fiber optic cable, and treatment output device; The input end of the transmission optical fiber is optically coupled to the output end of the laser emitter, and the treatment output device is optically coupled to the output end of the transmission optical fiber; wherein, the laser emitter is the laser emitter as described in claim 9.

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