Integrated erbium laser power feedback system and method

Abstract

The invention provides an integral erbium laser power feedback system and method. The integral erbium laser power feedback system comprises an optical integrating sphere and a photodiode. The optical integrating sphere comprises a front half part and a rear half part, and the front half part and the rear half part of the optical integrating sphere are respectively provided with a monitoring photodiode and a feedback photodiode; the optical integrating sphere is used for receiving the laser entering from the laser entrance port and enabling the laser to reach the monitoring photodiode and the feedback photodiode after multiple times of diffuse reflection of the laser; the monitoring photodiode is used for receiving the laser after multiple times of diffuse reflection and then monitoring the laser to obtain a first reading for the laser; and the feedback photodiode is used for receiving the laser after multiple times of diffuse reflection to obtain a second reading for the laser, and controlling the output energy of the laser based on a preset feedback loop.

Description

Technical Field

[0001] The present application relates to the fields of medical treatment and laser technology, and in particular to an integral erbium laser power feedback system and method. Background Art

[0002] Among existing solid-state lasers, erbium lasers have become very promising lasers because their wavelength is at the peak of water absorption. Common application areas include medical aesthetics, dentistry, gynecology, ENT, etc. Since erbium lasers act directly on the surface of the human body, the energy density reaching the surface of the human body must be strictly controlled, requiring stable intensity, timely, closed-loop control, etc. Therefore, a closed-loop feedback device is often added to the output end of the laser to perform real-time power regulation.

[0003] At present, in order to ensure the accuracy of the detected light signal, a photodiode with a large photosensitive surface is mainly used as a detector to form a closed-loop feedback so that the signal has sufficient gain.

[0004] However, the types and quantity of photodiodes with larger photosensitive surfaces are relatively small, and the corresponding gain of photodiodes with smaller photosensitive surfaces is also smaller. Moreover, when a photodiode is used as a detector to form a closed-loop feedback, the position of the photodiode relative to the laser is very likely to deviate, resulting in a deviation in the intensity of the laser, so it is unreliable to use a single photodiode to form a closed-loop feedback. In addition, if a single photodiode is damaged, it will be unable to detect. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide an integrating erbium laser power feedback system and method, which can use the optical integrating sphere and the photodiode as a spectroscopic device based on the principle of an optical integrating sphere, and use two photodiodes, a monitoring photodiode and a feedback photodiode, as detectors, and form feedback based on the readings of the two photodiodes, thereby solving the gain problem of a single detector caused by the small photosensitive surface, and also solving the problem of position deviation of the detector relative to the laser, so that the intensity deviation problem of the laser is also solved. At the same time, it avoids the problem of being unable to detect when a detector fails.

[0006] In a first aspect, an embodiment of the present application provides an integrating erbium laser power feedback system, comprising an optical integrating sphere and a photodiode; the optical integrating sphere comprises a front half and a rear half, and a monitoring photodiode and a feedback photodiode are respectively provided on the front half and the rear half of the optical integrating sphere;

[0007] The optical integrating sphere is used to receive the laser light entering from the laser incident port, and to diffusely reflect the laser light multiple times so that the laser light reaches the monitoring photodiode and the feedback photodiode; wherein the laser incident port is located in the middle of the optical integrating sphere;

[0008] The monitoring photodiode is used to monitor the laser after receiving the laser after multiple diffuse reflections, and obtain a first reading of the laser;

[0009] The feedback photodiode is used to receive the laser after multiple diffuse reflections, obtain a second reading for the laser, and control the output energy of the laser based on a preset feedback loop; wherein the light intensity at the positions where the monitoring photodiode and the feedback photodiode are located is consistent.

[0010] In a possible implementation, controlling the output energy of the laser based on a preset feedback loop includes:

[0011] determining whether a reading difference between the first reading of the monitoring photodiode and the second reading of the feedback photodiode exceeds a set value;

[0012] If not, it is determined that the first reading and the second reading are consistent, and the output energy of the laser is adjusted based on the difference in the readings.

[0013] In a possible implementation, the integrated erbium laser power feedback system includes a laser generating device;

[0014] The laser generating device is used to emit the laser so that the laser enters the optical integrating sphere from the laser incident port.

[0015] In a possible implementation, the integral erbium laser power feedback system further includes a safety shutter;

[0016] The safety shading device is used to protect the laser generating device and personnel safety.

[0017] In a possible implementation, the feedback photodiode is further configured to determine that the first reading is inconsistent with the second reading and close the safety shutter in response to the reading difference exceeding a first set value.

[0018] In a possible implementation, the integral erbium laser power feedback system further includes a display device; the display device is connected to the feedback photodiode;

[0019] The feedback photodiode is further used to send corresponding display information to the display device when the first reading and the second reading are inconsistent; wherein the display information indicates that the readings of the monitoring photodiode and the feedback photodiode are inconsistent;

[0020] The display device is used to receive and display the display information.

[0021] In a possible implementation, the integral erbium laser power feedback system further comprises a target bait laser machine and an external laser meter connected to the target bait laser machine; the monitoring photodiode and the feedback photodiode are calibrated by the following steps before use:

[0022] In response to selecting a target mode and a target laser frequency after entering a maintenance procedure of the target bait laser machine, entering a preparation mode of the target bait laser machine;

[0023] The laser meter measures the laser of the target bait laser machine to obtain the light intensity of the laser, and after adjusting the light intensity of the laser to the target light intensity, the reading of the monitoring photodiode is adjusted to be consistent with the reading of the feedback photodiode.

[0024] In a possible implementation, the integral erbium laser power feedback system further includes an external energy meter, a fine-tuning potentiometer, and a foot switch connected to the target bait laser machine; the step of adjusting the reading of the monitoring photodiode to be consistent with the reading of the feedback photodiode includes:

[0025] obtaining a reading of the feedback photodiode;

[0026] In response to rotating the trimmer potentiometer and stepping on the foot switch, continuously measuring the energy of the laser using the energy meter so that the reading of the energy meter is consistent with the reading of the feedback photodiode;

[0027] In response to depressing the foot switch, the trimmer potentiometer is adjusted to cause the reading of the monitor photodiode to coincide with the reading of the feedback photodiode.

[0028] In a possible implementation manner, adjusting the reading of the monitoring photodiode to be consistent with the reading of the feedback photodiode includes:

[0029] In response to the light intensity of the laser being within a first light intensity range, adjusting the difference between the reading of the feedback photodiode and the reading of the energy meter to be within a second set value;

[0030] The difference between the reading of the monitoring photodiode and the reading of the feedback photodiode is adjusted to be within a third set value, and then it is determined that the reading of the monitoring photodiode is consistent with the reading of the feedback photodiode.

[0031] In a second aspect, the embodiment of the present application further provides an integral erbium laser power feedback method, which is applied to the integral erbium laser power feedback system of the embodiment of the first aspect; the integral erbium laser power feedback system comprises an optical integrating sphere and a photodiode; the optical integrating sphere comprises a front half and a rear half, and a monitoring photodiode and a feedback photodiode are respectively provided on the front half and the rear half of the optical integrating sphere; the method comprises:

[0032] The optical integrating sphere receives the laser light entering from the laser incident port, and after multiple diffuse reflections of the laser light, the laser light reaches the monitoring photodiode and the feedback photodiode; wherein the laser incident port is located in the middle of the optical integrating sphere;

[0033] The monitoring photodiode monitors the laser after receiving the laser after multiple diffuse reflections to obtain a first reading of the laser;

[0034] The feedback photodiode receives the laser after multiple diffuse reflections, obtains a second reading of the laser, and controls the output energy of the laser based on a preset digital online feedback loop; wherein the light intensity at the positions where the monitoring photodiode and the feedback photodiode are located is consistent.

[0035] The embodiment of the present application provides an integral erbium laser power feedback system and method, the integral erbium laser power feedback system includes an optical integrating sphere and a photodiode; the optical integrating sphere includes a front half and a rear half, and a monitoring photodiode and a feedback photodiode are respectively provided on the front half and the rear half of the optical integrating sphere; the optical integrating sphere is used to receive the laser entering from the laser incident port, and after multiple diffuse reflections of the laser, the laser reaches the monitoring photodiode and the feedback photodiode; the monitoring photodiode is used to monitor the laser after receiving multiple diffuse reflections, and obtain a first reading for the laser; the feedback photodiode is used to receive the laser after multiple diffuse reflections, obtain a second reading for the laser, and control the output energy of the laser based on a preset feedback loop. In the present application, according to the principle of the optical integrating sphere, the optical integrating sphere and the photodiode are used as a spectroscopic device, and the two photodiodes, the monitoring photodiode and the feedback photodiode, are used as detectors, and feedback is formed based on the readings of the two photodiodes, which solves the gain problem of a single detector caused by a small photosensitive surface, and also solves the problem of position deviation of the detector relative to the laser, so that the intensity deviation problem of the laser is also solved, and at the same time, avoids the problem of failure to detect when a detector fails.

[0036] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 is a structural block diagram of an integral erbium laser power feedback system according to an embodiment of the present application;

[0039] Figure 2 It is a schematic diagram of the structure of an optical integrating sphere and a photodiode;

[0040] Figure 3 It is a schematic diagram of the spherical surface of an optical integrating sphere;

[0041] Figure 4 is a schematic diagram of the laser incident port;

[0042] Figure 5 It is a flow chart of an integral erbium laser power feedback method according to an embodiment of the present application. DETAILED DESCRIPTION

[0043] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of order, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0044] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0045] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0046] Considering that among existing solid-state lasers, erbium lasers have become very promising lasers because their wavelength is at the peak of water absorption. Common application fields mainly include medical beauty, dentistry, gynecology, ENT, etc. Since erbium lasers act directly on the surface of the human body, the energy density reaching the surface of the human body must be strictly controlled, requiring stable intensity, timely, closed-loop control, etc. Therefore, a closed-loop feedback device is often added to the output end of the laser to perform real-time power regulation.

[0047] At present, in order to ensure the accuracy of the signal of the detected light, a photodiode with a large photosensitive surface is mainly used as a detector to form a closed-loop feedback so that the signal has sufficient gain. Specifically, the laser generated by the laser generator passes through the light splitting device, which divides most of the light to the treatment end and a small part of the light to the power detection device. After corresponding filtering and amplification, a feedback signal is formed and reaches the adjustment circuit. The adjustment circuit compares the feedback information with the original setting and then increases or decreases the control, thereby forming a closed-loop control.

[0048] However, in order to ensure the accuracy of the detected light signal, a photodiode with a larger photosensitive surface is often required so that the signal has sufficient gain. However, the reality is that there are very few types of photodiodes near the wavelength of 2940nm, and the photosensitive surface is very small. The photosensitive surface of foreign countries can be achieved above 2mm, while the photosensitive surface of domestic countries is mostly below 1mm, with a typical value of 0.8mm. Therefore, a typical contradiction is formed, that is, the types and number of photodiodes with larger photosensitive surfaces are small, and the corresponding gain of photodiodes with smaller photosensitive surfaces is also small. In addition, most of the existing technologies use one photodiode. When a photodiode is used as a detector to form a closed-loop feedback, the position of the photodiode relative to the laser is very easy to deviate, resulting in a deviation in the intensity of the laser, so it is unreliable to form a closed-loop feedback with one photodiode. In addition, if a single photodiode is damaged, it will not be able to detect.

[0049] It is understandable to those skilled in the art that the output spot of a typical erbium laser is mm-level, with a typical value of 4-5mm. Although it has been processed by spectroscopy, the size of the spot has not changed much, so if a 4-5mm spot is introduced into a 0.8mm photosensitive surface without focusing, energy will be lost, and deviations may occur due to the position of the detection surface. Focused light may cause the power to exceed the detection range of the detector, causing the diode to be abnormal or burnt out, and introduce alignment issues between the focused spot and the photosensitive surface. Furthermore, a single detector is easily damaged, and if only a single photodiode is used, there will often be risks.

[0050] To address this problem, the present application provides an integrating erbium laser power feedback system and method. Based on the principle of an optical integrating sphere, an optical integrating sphere and a photodiode are used as spectroscopic devices. Two photodiodes, a monitoring photodiode and a feedback photodiode, are used as detectors. Feedback is formed based on the readings of the two photodiodes. This solves the gain problem of a single detector due to the small photosensitive surface, and the problem of position deviation of the detector relative to the laser. The problem of intensity deviation of the laser is also solved. At the same time, the problem of being unable to detect when a detector fails is avoided.

[0051] Figure 1 1 is a structural block diagram of an integral erbium laser power feedback system according to an embodiment of the present application. The integral erbium laser power feedback system 100 includes an optical integrating sphere 10 and a photodiode 20 .

[0052] The optical integrating sphere 10 includes a front half and a rear half, that is, the optical integrating sphere 10 is composed of two halves, and the front half and the rear half of the optical integrating sphere 10 are respectively provided with a monitoring photodiode 201 and a feedback photodiode 202. It should be noted that the surface of the optical integrating sphere 10 is smooth.

[0053] For example, Figure 2 Schematic diagram of the structure of the optical integrating sphere 10 and the photodiode 20. Figure 2 As shown, the monitoring photodiode 201 and the feedback photodiode 202 are respectively arranged on the front half and the rear half of the optical integrating sphere 10. Figure 3 As shown, it is a schematic diagram of the spherical surface of the optical integrating sphere 10, Figure 4 is a schematic diagram of the laser incident port.

[0054] The optical integrating sphere 10 is used to receive the laser light entering from the laser incident port, and after multiple diffuse reflections of the laser light, the laser light reaches the monitoring photodiode 201 and the feedback photodiode 202. The laser incident port is located in the middle of the optical integrating sphere 10. For example, Figure 2As shown, the laser incident port is located in the middle of the front half of the optical integrating sphere 10 , and the laser enters the optical integrating sphere 10 from the laser incident port. There are two photodiodes on the integrating sphere, namely a monitoring photodiode 201 and a feedback photodiode 202 .

[0055] It should be noted that the surface of the optical integrating sphere 10 is smooth and easily diffuse reflection occurs. After the laser enters from the laser incident port, it reaches the two photodiodes 20 after multiple diffuse reflections. Since the light is reflected multiple times, the light intensity on the inner surface of the optical integrating sphere 10 is consistent. Therefore, the light intensity at the positions of the two photodiodes 20 is consistent (or basically consistent within an acceptable range), and the inconsistency of the light intensity will not be affected by errors caused during assembly.

[0056] Therefore, two photodiodes are used as detectors to solve the gain problem of a single detector due to the small photosensitive surface. The existence of the integrating sphere also solves the problem of position deviation of the detector relative to the laser, so that the intensity deviation problem of the laser is also solved. At the same time, the problem of being unable to detect when a detector fails is avoided.

[0057] The monitoring photodiode 201 is used to monitor the laser after receiving the laser after multiple diffuse reflections, and obtain a first reading of the laser, wherein the first reading is a reading of the laser light intensity (output energy) of the monitoring photodiode 201 .

[0058] The feedback photodiode 202 is used to receive the laser after multiple diffuse reflections, obtain a second reading of the laser, and control the output energy of the laser based on a preset feedback loop. The light intensity at the location of the monitoring photodiode 201 and the feedback photodiode 202 is consistent. The second reading is the reading of the laser light intensity (output energy) of the feedback photodiode 202.

[0059] Furthermore, when the output energy of the laser is controlled based on a preset feedback loop, it is determined whether the reading difference between the first reading of the monitoring photodiode 201 and the second reading of the feedback photodiode 202 exceeds a set value; if not, it is determined that the first reading and the second reading are consistent, and the output energy of the laser is adjusted based on the reading difference. The set value is a pre-set value. It should be noted that the reading difference between the first reading of the monitoring photodiode 201 and the second reading of the feedback photodiode 202 is determined. When the reading difference between the first reading and the second reading does not exceed the set value, it is determined that the first reading and the second reading are consistent, and the output energy of the laser is adjusted based on the reading difference.

[0060] It should be noted that when the first reading and the second reading are consistent, it means that the reading of the monitoring photodiode 201 must be consistent with the reading of the feedback photodiode 202, thereby forming a double safety structure.

[0061] Furthermore, the integral erbium laser power feedback system 100 includes a laser generating device.

[0062] The laser generating device is used to emit laser light so that the laser light enters the optical integrating sphere 10 from the laser incident port.

[0063] Furthermore, the integral erbium laser power feedback system 100 also includes a safety shutter.

[0064] Among them, the safety shading device is used to protect the laser generating device and personnel safety.

[0065] Further, the feedback photodiode 202 is also used to determine that the first reading and the second reading are inconsistent in response to the reading difference exceeding the first set value, and close the safety shutter. It should be noted that when the reading difference between the first reading and the second reading exceeds the set value, it is determined that the first reading and the second reading are inconsistent, and the safety shutter is closed. In addition, the entire system will also be disabled and locked.

[0066] Furthermore, the integral erbium laser power feedback system 100 further includes a display device, wherein the display device is connected to the feedback photodiode 202. For example, the display device may be a display screen.

[0067] The feedback photodiode 202 is also used to send corresponding display information to the display device when the first reading and the second reading are inconsistent. The display information indicates that the readings of the monitoring photodiode 201 and the feedback photodiode 202 are inconsistent. Specifically, when the first reading and the second reading are inconsistent, when the safety shutter is closed and the entire system is disabled, the corresponding display information is also sent to the display device at the same time.

[0068] The display device is used to receive and display information. Specifically, the display device prompts that the measured values ​​of the monitoring photodiode 201 and the feedback photodiode 202 are inconsistent by displaying information.

[0069] Furthermore, the integral erbium laser power feedback system 100 further includes a target bait laser machine and an external laser meter connected to the target bait laser machine. The target bait laser machine may be an Er:YAG laser machine.

[0070] The monitoring photodiode 201 and the feedback photodiode 202 are calibrated by the following steps before use:

[0071] In response to entering the maintenance procedure of the target bait laser machine and selecting the target mode and the target laser frequency, the preparation mode of the target bait laser machine is entered; the laser of the target bait laser machine is measured based on the laser meter to obtain the laser light intensity, and after adjusting the laser light intensity to the target light intensity, the reading of the monitoring photodiode 201 is adjusted to be consistent with the reading of the feedback photodiode 202. The target light intensity is a preset light intensity, for example, 150mJ.

[0072] Specifically, taking the Er:YAG laser machine as an example, turn on the machine to enter the maintenance program of the Er:YAG laser machine, select the target mode, such as the SP mode, and the target laser frequency, such as the target laser frequency is 5Hz, enter the READY mode, measure the laser of the target bait laser machine based on the laser meter to obtain the laser light intensity, adjust the laser light intensity to the target light intensity, so as to adjust the reading of the monitoring photodiode 201 to be consistent with the reading of the feedback photodiode 202.

[0073] Optionally, the intensity of the laser light is adjusted to a target intensity by adjusting the voltage.

[0074] Furthermore, the integral erbium laser power feedback system 100 also includes an external energy meter, a fine-tuning potentiometer, and a foot switch connected to the target bait laser machine. The energy meter includes a high energy meter and a low energy meter. The high energy meter corresponds to a low range (LO) that can be calibrated individually for each photodiode, and the low energy meter corresponds to a high range (HI) that can be calibrated individually for each photodiode; both the monitoring photodiode 201 and the feedback photodiode 202 have two ranges that can be calibrated individually, namely a low range and a high range.

[0075] It should be noted that when the reading of the monitoring photodiode 201 is adjusted to be consistent with the reading of the feedback photodiode 202, the reading of the feedback photodiode 202 is obtained; in response to rotating the fine-tuning potentiometer and stepping on the foot switch, the energy of the laser is continuously measured using an energy meter to make the reading of the energy meter consistent with the reading of the feedback photodiode 202; in response to stepping on the foot switch, the fine-tuning potentiometer is adjusted to make the reading of the monitoring photodiode 201 consistent with the reading of the feedback photodiode 202.

[0076] Specifically, observe the reading of the feedback photodiode 202, find the fine-tuning potentiometer corresponding to the feedback photodiode 202, use an applicable screwdriver to rotate the fine-tuning potentiometer, step on the foot switch, use the external energy meter to continuously measure the laser energy, slowly adjust the fine-tuning potentiometer until the reading of the feedback photodiode 202 is consistent with the reading of the external energy meter, and adjust the fine-tuning potentiometer with the foot switch pressed until the reading of the monitoring photodiode 201 is consistent with the reading of the feedback photodiode 202.

[0077] Optionally, when adjusting the reading of the monitoring photodiode 201 to be consistent with the reading of the feedback photodiode 202, in response to the light intensity of the laser being in the first light intensity range, the difference between the reading of the feedback photodiode 202 and the reading of the energy meter is adjusted to be within a second set value; the difference between the reading of the monitoring photodiode 201 and the reading of the feedback photodiode 202 is adjusted to be within a third set value, and it is determined that the reading of the monitoring photodiode 201 is consistent with the reading of the feedback photodiode 202. The first light intensity range represents the highest energy and the lowest energy of the laser.

[0078] To continue, the above calibration process is repeated under different target modes and different target laser frequencies (but the energy thereof needs to be between 30mJ and 250mJ) to make necessary fine adjustments to the photodiode. When the laser light intensity is in the first light intensity range, the difference between the reading of the feedback photodiode 202 and the reading of the energy meter is adjusted to be within the second set value, and the difference between the reading of the monitoring photodiode 201 and the reading of the feedback photodiode 202 is adjusted to be within the third set value. At this time, it is determined that the reading of the monitoring photodiode 201 is consistent with the reading of the feedback photodiode 202, so as to achieve the calibration of the high and low energy of the monitoring photodiode 201 and the feedback photodiode 202.

[0079] Furthermore, the integrated erbium laser power feedback system 100 also includes a power detection device and an adjustment circuit. The power detection device is respectively connected to the optical integrating sphere 10 and the photodiode 20, and the adjustment circuit, and the adjustment circuit is connected to the laser generating device. It should be noted that the present application mainly replaces the optical integrating sphere 10 and the two photodiodes 20 with the spectrometer, and the power detection device and the adjustment circuit of the present application can refer to the prior art, and will not be described in detail.

[0080] The integrating erbium laser power feedback system of the present application comprises an optical integrating sphere 10 and a photodiode; the optical integrating sphere 10 comprises a front half and a rear half, and a monitoring photodiode 201 and a feedback photodiode 202 are respectively provided on the front half and the rear half of the optical integrating sphere 10; the optical integrating sphere 10 is used to receive the laser entering from the laser incident port, and after multiple diffuse reflections of the laser, the laser reaches the monitoring photodiode 201 and the feedback photodiode 202; the monitoring photodiode 201 is used to monitor the laser after receiving the multiple diffuse reflections, and obtain a first reading for the laser; the feedback photodiode 202 is used to receive the laser after multiple diffuse reflections, obtain a second reading for the laser, and control the output energy of the laser based on a preset feedback loop. In the present application, based on the principle of an optical integrating sphere, an optical integrating sphere and a photodiode are used as a spectroscopic device, two photodiodes, a monitoring photodiode and a feedback photodiode, are used as detectors, and feedback is formed based on the readings of the two photodiodes. This solves the gain problem of a single detector due to the small photosensitive surface, and also solves the problem of position deviation of the detector relative to the laser, thereby solving the problem of intensity deviation of the laser. At the same time, it avoids the problem of being unable to detect when a detector fails.

[0081] Figure 5 1 is a flow chart of an integrated erbium laser power feedback method according to an embodiment of the present application, which is applied to the integrated erbium laser power feedback system 100 of the above embodiment. The integrated erbium laser power feedback system 100 includes an optical integrating sphere 10 and a photodiode 20; the optical integrating sphere 10 includes a front half and a rear half, and a monitoring photodiode 201 and a feedback photodiode 202 are respectively provided on the front half and the rear half of the optical integrating sphere 10. Figure 5 As shown, the integrated erbium laser power feedback method of the embodiment of the present application may specifically include the following steps:

[0082] S501 , the optical integrating sphere 10 receives the laser light entering from the laser incident port, and diffusely reflects the laser light multiple times so that the laser light reaches the monitoring photodiode 201 and the feedback photodiode 202 .

[0083] In the embodiment of the present application, the laser incident port is located in the middle of the optical integrating sphere 10 .

[0084] S502, the monitoring photodiode 201 monitors the laser after receiving the laser after multiple diffuse reflections, and obtains a first reading of the laser.

[0085] S503, the feedback photodiode 202 receives the laser after multiple diffuse reflections, obtains a second reading of the laser, and controls the output energy of the laser based on a preset digital online feedback loop.

[0086] In the embodiment of the present application, the light intensities at the locations of the monitoring photodiode 201 and the feedback photodiode 202 are consistent.

[0087] The integrated erbium laser power feedback method of the present application, the integrated erbium laser power feedback system 100 includes an optical integrating sphere 10 and a photodiode 20; the optical integrating sphere 10 includes a front half and a rear half, and the front half and the rear half of the optical integrating sphere 10 are respectively provided with a monitoring photodiode 201 and a feedback photodiode 202; the optical integrating sphere 10 is used to receive the laser entering from the laser incident port, and after multiple diffuse reflections of the laser, the laser reaches the monitoring photodiode 201 and the feedback photodiode 202; the monitoring photodiode 201 is used to monitor the laser after receiving the multiple diffuse reflections, and obtain a first reading for the laser; the feedback photodiode 202 is used to receive the laser after multiple diffuse reflections, obtain a second reading for the laser, and control the output energy of the laser based on a preset feedback loop. The integral erbium laser power feedback method of the present application, based on the principle of an optical integrating sphere, uses an optical integrating sphere and a photodiode as a spectroscopic device, uses two photodiodes, a monitoring photodiode and a feedback photodiode, as detectors, and forms feedback based on the readings of the two photodiodes, thereby solving the gain problem of a single detector due to the small photosensitive surface, and also solving the problem of position deviation of the detector relative to the laser, thereby solving the problem of intensity deviation of the laser, and at the same time avoiding the problem of being unable to detect when a detector fails.

[0088] It should be noted here that the explanation of the above-mentioned embodiment is also applicable to the integral erbium laser power feedback method of the embodiment of the present application, and the specific process will not be repeated here. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0089] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0091] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the deployment method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0092] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An integral erbium laser power feedback system, characterized in that: It comprises an optical integrating sphere and a photodiode; the optical integrating sphere comprises a front half and a rear half, and the front half and the rear half of the optical integrating sphere are respectively provided with a monitoring photodiode and a feedback photodiode; The optical integrating sphere is used to receive the laser light entering from the laser incident port, and to diffusely reflect the laser light multiple times so that the laser light reaches the monitoring photodiode and the feedback photodiode; wherein the laser incident port is located in the middle of the optical integrating sphere; The monitoring photodiode is used to monitor the laser after receiving the laser after multiple diffuse reflections, and obtain a first reading of the laser; The feedback photodiode is used to receive the laser after multiple diffuse reflections, obtain a second reading for the laser, and control the output energy of the laser based on a preset feedback loop; wherein the light intensity at the positions where the monitoring photodiode and the feedback photodiode are located is consistent.

2. The system according to claim 1, characterized in that The controlling the output energy of the laser based on a preset feedback loop comprises: determining whether a reading difference between the first reading of the monitoring photodiode and the second reading of the feedback photodiode exceeds a set value; If not, it is determined that the first reading and the second reading are consistent, and the output energy of the laser is adjusted based on the difference in the readings.

3. The system according to claim 2, characterized in that The integral erbium laser power feedback system comprises a laser generating device; The laser generating device is used to emit the laser so that the laser enters the optical integrating sphere from the laser incident port.

4. The system according to claim 3, characterized in that The integral erbium laser power feedback system also includes a safety shutter; The safety shading device is used to protect the laser generating device and personnel safety.

5. The system according to claim 4, characterized in that The feedback photodiode is further configured to determine that the first reading is inconsistent with the second reading and close the safety shutter in response to the reading difference exceeding a first set value.

6. The system according to claim 5, characterized in that The integral erbium laser power feedback system further includes a display device; the display device is connected to the feedback photodiode; The feedback photodiode is further used to send corresponding display information to the display device when the first reading and the second reading are inconsistent; wherein the display information indicates that the readings of the monitoring photodiode and the feedback photodiode are inconsistent; The display device is used to receive and display the display information.

7. The system according to claim 6, characterized in that The integral erbium laser power feedback system further comprises a target bait laser machine and an external laser meter connected to the target bait laser machine; the monitoring photodiode and the feedback photodiode are calibrated by the following steps before use: In response to selecting a target mode and a target laser frequency after entering a maintenance procedure of the target bait laser machine, entering a preparation mode of the target bait laser machine; The laser meter measures the laser of the target bait laser machine to obtain the light intensity of the laser, and after adjusting the light intensity of the laser to the target light intensity, the reading of the monitoring photodiode is adjusted to be consistent with the reading of the feedback photodiode.

8. The system according to claim 7, characterized in that The integral erbium laser power feedback system also includes an external energy meter, a fine-tuning potentiometer and a foot switch connected to the target bait laser machine; the adjustment of the reading of the monitoring photodiode to be consistent with the reading of the feedback photodiode includes: obtaining a reading of the feedback photodiode; In response to rotating the trimmer potentiometer and stepping on the foot switch, continuously measuring the energy of the laser using the energy meter so that the reading of the energy meter is consistent with the reading of the feedback photodiode; In response to depressing the foot switch, the trimmer potentiometer is adjusted to cause the reading of the monitor photodiode to coincide with the reading of the feedback photodiode.

9. The system according to claim 8, characterized in that The step of adjusting the reading of the monitoring photodiode to be consistent with the reading of the feedback photodiode includes: In response to the light intensity of the laser being within a first light intensity range, adjusting the difference between the reading of the feedback photodiode and the reading of the energy meter to be within a second set value; The difference between the reading of the monitoring photodiode and the reading of the feedback photodiode is adjusted to be within a third set value, and then it is determined that the reading of the monitoring photodiode is consistent with the reading of the feedback photodiode.

10. An integral erbium laser power feedback method, characterized in that: The integrated erbium laser power feedback system applied to any one of claims 1 to 9; the integrated erbium laser power feedback system comprises an optical integrating sphere and a photodiode; the optical integrating sphere comprises a front half and a rear half, and a monitoring photodiode and a feedback photodiode are respectively provided on the front half and the rear half of the optical integrating sphere; the method comprises: The optical integrating sphere receives the laser light entering from the laser incident port, and after multiple diffuse reflections of the laser light, the laser light reaches the monitoring photodiode and the feedback photodiode; wherein the laser incident port is located in the middle of the optical integrating sphere; The monitoring photodiode monitors the laser after receiving the laser after multiple diffuse reflections to obtain a first reading of the laser; The feedback photodiode receives the laser after multiple diffuse reflections, obtains a second reading of the laser, and controls the output energy of the laser based on a preset digital online feedback loop; wherein the light intensity at the positions where the monitoring photodiode and the feedback photodiode are located is consistent.

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