WO2020037860A1

WO2020037860A1 - Method and apparatus for adjusting output power of pulsed laser, and pulsed laser

Info

Publication number: WO2020037860A1
Application number: PCT/CN2018/117483
Authority: WO
Inventors: 何高锋; 蒋峰
Original assignee: 深圳市创鑫激光股份有限公司
Priority date: 2018-08-23
Filing date: 2018-11-26
Publication date: 2020-02-27
Also published as: CN109088303A; CN109088303B

Abstract

A method and apparatus for adjusting output power of a pulsed laser (100), and a pulsed laser (100). The method for adjusting output power of a pulsed laser (100) comprises: if the percentage of the input power of a pulsed laser (100) is equal to zero, controlling both the current value in a first-stage optical path (12) of the pulsed laser (100) and the current value in a second-stage optical path (13) of the pulsed laser (100) to be zero; if the percentage of the input power of the pulsed laser (100) is greater than zero and less than or equal to a reference ratio, controlling the current value in the first-stage optical path (12) to be in a linear relationship with the percentage of the input power, and controlling the current value in the second-stage optical path (13) to be zero; and if the percentage of the input power is greater than the reference ratio, controlling the current value in the first-stage optical path (12) to be a first current value, and controlling the current value in the second-stage optical path (13) to be in a linear relationship with the percentage of the input power. This method implements the adjustment of the output power of the pulsed laser (100) from zero, and ensures that said output power can be adjusted to relatively low ideal output power in precision applications.

Description

Method and device for adjusting output power of pulsed laser and pulsed laser

Technical field

The embodiments of the present application relate to the technical field of pulsed lasers, and in particular, to a method, a device, and a pulsed laser for adjusting the output power of a pulsed laser.

Background technique

Pulse laser is relative to continuous laser. Its characteristic is that the output laser shape is a spike pulse. Pulse laser has several parameters: pulse width, pulse energy, pulse frequency and average power, etc. Pulse lasers are generally composed of two-stage laser light paths. The role of the first-stage optical path is to form seed light, that is, to form seed lasers such as the required wavelength, frequency, and pulse width. The second-stage optical path is to amplify the power of the first stage. The average power is mostly the power from the secondary optical path.

In the process of implementing this application, the inventor of the present application found that the following problems existed in the prior art: In the prior art, as shown in FIG. 1, FIG. 1 is a percentage of the output power and input power of the pulsed laser in the prior art. A relationship diagram, where the X-axis is the percentage of input power, the Y-axis is the actual power output, and the percentage of the input power of the pulsed laser is the current input power of the pulsed laser divided by the rated input power. As can be seen in Figure 1, After the pulse laser is powered on and the light-on command is given, the actual output power of the pulse laser is not 0, but the power at point a. The power at this point is Wa, and the power at point a is actually the output power of the first-order optical path Since the output power of the pulsed laser is at least the power of point a, or the light is not turned on, the power range to be turned on is at least Wa, and the power range of 0-Wa is not adjustable. When the constant value of the current of the first-stage optical path is larger, the corresponding value of the first-stage power is also larger, and the influence on the power of the entire pulse laser will be greater. Therefore, the output power of the laser cannot be adjusted to a smaller value based on the power of the point a. In the case of precision applications, the power of the point a will cause confusion, and sometimes even the laser output of the power of the point a is not allowed, especially It is in materials that are sensitive to light. The power at point a will cause adverse effects on these materials.

Application content

The technical problem mainly solved by the embodiments of the present application is to provide a method, a device, a pulse laser and a laser marking machine for adjusting the output power of a pulse laser, which aims to solve the problem that the output power of the existing pulse laser cannot be adjusted from scratch.

In the first aspect, in order to solve the above technical problems, a technical solution adopted in the embodiment of the present application is to provide a method for adjusting the output power of a pulse laser, including:

Determining whether the input power percentage of the pulsed laser is less than or equal to a reference ratio;

If yes, determine whether the input power percentage of the pulsed laser is equal to zero;

When the input power percentage of the pulsed laser is equal to zero, the current value in the first stage optical path controlling the pulsed laser and the current value in the second stage optical path of the pulsed laser are both zero;

When the input power percentage of the pulsed laser is greater than zero and less than or equal to the reference ratio, controlling the current value in the first-stage optical path to have a linear relationship with the input power percentage, and controlling the The current value is zero, and when the input power percentage is equal to the reference ratio, the current value of the first-stage optical circuit is equal to the first current value, where the reference ratio is the first-level power of the pulsed laser and Ratio of rated power.

Optionally, when the input power percentage is greater than the reference ratio, controlling the current value in the first stage optical path to a first current value, and controlling the current value in the second stage optical path and the input power The percentage has a linear relationship. When the input power percentage is equal to one, the current value of the second-stage optical path is equal to the second current value.

The current value of the first-stage optical circuit determines the output power of the first-stage optical circuit, and the current value of the second-stage optical circuit and the output power of the first-stage optical circuit determine the output of the second-stage optical circuit. Power, the output power of the second stage optical path determines the output power of the pulse laser.

Optionally, when the input power percentage of the pulsed laser is equal to zero, the current value in the first-stage optical path controlling the pulsed laser and the current value in the second-stage optical path of the pulsed laser are both zero. Before the step, the method further includes:

Acquiring a first current value corresponding to when the output power of the pulse laser is a first-level power, and the first current value is a current value acting on a first-stage optical path of the pulse laser;

A second current value corresponding to when the output power of the pulse laser is a rated power is obtained, and the second current value is a current value acting on a second-stage optical path of the pulse laser.

Optionally, the step of obtaining a first current value corresponding to when the output power of the pulsed laser is a first-level power includes:

Adjusting the output power of the first stage optical path to the first stage power;

The current value in the first-stage optical path is obtained and used as the first current value.

Optionally, the step of obtaining a second current value corresponding to when the output power of the pulsed laser is a rated power includes:

Maintaining the current value in the first-stage optical path to a first current value, and adjusting the output power of the pulse laser to a rated power;

The current value in the second-stage optical path is obtained and used as the second current value.

Optionally, the step of maintaining the current value in the first-stage optical path to a first current value and adjusting the output power of the pulsed laser to a rated power includes:

Maintaining the current value of the first-stage pump source in the first-stage optical path as the first current value, and then adjusting the current value of the second-stage pump source in the second-stage optical path until the output power of the pulse laser is adjusted to rated power.

Optionally, the first-stage optical path of the pulsed laser includes a first-stage pump source, a first-stage beam combiner, a first-stage amplifier, and a first-stage optical isolator;

The second-stage optical path of the pulse laser includes a two-stage pumped fiber, a two-stage pump source, a two-stage beam combiner, and a two-stage passive fiber;

The primary pump source and the secondary pump source are each composed of one or more pump sources.

In the second aspect, in order to solve the above technical problems, another technical solution adopted in the embodiments of the present application is to provide a device for adjusting the output power of a pulse laser, including:

A first determining module, configured to determine whether an input power percentage of the pulsed laser is less than or equal to a reference ratio;

A second judgment module, configured to determine whether the input power percentage of the pulse laser is equal to zero if the input power percentage of the pulse laser is less than or equal to a reference ratio;

A first control module configured to control a current value in a first-stage optical path of the pulse laser and a current value in a second-stage optical path of the pulse laser when the input power percentage of the pulse laser is equal to zero; zero;

A second control module, configured to control a linear relationship between the current value in the first-stage optical path and the input power percentage when the input power percentage of the pulsed laser is greater than zero and less than or equal to a reference ratio, and control The current value in the second-stage optical circuit is zero, and when the input power percentage is equal to the reference ratio, the current value in the first-stage optical circuit is equal to the first current value, wherein the reference ratio is The ratio of the first power and rated power of the pulsed laser is described.

Optionally, the device further includes:

A third control module, configured to control the current value in the first stage optical path to a first current value when the input power percentage is greater than the reference ratio, and to control the current value in the second stage optical path and The input power percentage has a linear relationship. When the input power percentage is equal to one, the current value of the second-stage optical circuit is equal to the second current value.

Optionally, the device further includes:

A first acquisition module, configured to acquire a first current value corresponding to an output power of the pulse laser when the output power is a first-level power, and the first current value is a current value acting on a first-stage optical path of the pulse laser ; Wherein the first acquisition module includes a first adjustment unit and a first acquisition unit, the first adjustment unit is used to adjust the output power of the first-stage optical path to the first-stage power; the first acquisition unit is used to obtain The current value in the first stage optical path is taken as the first current value;

A second obtaining module, configured to obtain a second current value corresponding to the output power of the pulse laser when the output power is the rated power, and the second current value is a current value acting on a second-stage optical path of the pulse laser; The second obtaining module includes a second adjusting unit and a second obtaining unit. The second adjusting unit is configured to maintain a current value in the first-stage optical path to a first current value and adjust an output of the pulse laser. Power to rated power; the second obtaining unit is configured to obtain a current value in the second-stage optical path and use it as a second current value.

In a third aspect, in order to solve the above technical problems, another technical solution adopted in the embodiments of the present application is to provide a pulse laser, including:

A first stage optical path, which includes a first stage pump source;

A second-stage optical path, which includes a second-stage pump source;

A controller, which is respectively connected to the first-stage optical path and the second-stage optical path, and the controller is configured to control the current value of the first-stage pump source and The current value of the secondary pump source is all zero; and when the input power percentage of the pulsed laser is greater than zero and less than or equal to a reference ratio, controlling the current value of the primary pump source and the input The power percentage has a linear relationship, and the current value of controlling the secondary pump source is zero, and when the input power percentage is equal to the reference ratio, the current value of the primary pump source is equal to the first current value Wherein the reference ratio is the ratio of the first-level power and the rated power of the pulsed laser; and when the input power percentage is greater than the reference ratio, the current value of the first-stage pump source is controlled to be A current value, which controls the current value of the secondary pump source and the input power percentage to have a linear relationship. When the input power percentage is equal to one, the current of the secondary pump source Value is equal to the second current value; wherein the current value of the first-stage pump source determines the output power of the first-stage optical circuit, the current value of the second-stage pump source, and the output power of the first-stage optical circuit The output power of the second-stage optical path is determined, and the output power of the second-stage optical path determines the output power of the pulse laser.

Optionally, the controller is further configured to obtain a first current value corresponding to when the output power of the pulse laser is a first-level power, and the first current value is a first stage acting on the pulse laser. A current value of the optical path; and obtaining a second current value corresponding to when the output power of the pulse laser is a rated power, the second current value is a current value acting on a second-stage optical path of the pulse laser.

In a fourth aspect, in order to solve the above technical problems, another technical solution adopted in the embodiments of the present application is to provide a laser marking machine, where the laser marking machine includes the above-mentioned pulse laser.

The beneficial effects of the embodiments of the present application are: different from the situation in the prior art, in the embodiments of the present application, the method for adjusting the output power of the pulse laser includes: determining whether the input power percentage of the pulse laser is less than or equal to a reference ratio; if yes To determine whether the input power percentage of the pulse laser is equal to zero; when the input power percentage of the pulse laser is equal to zero, controlling the current value in the first-stage optical path of the pulse laser and the second-stage optical path of the pulse laser The current values are zero; when the input power percentage of the pulsed laser is greater than zero and less than or equal to the reference ratio, controlling the current value in the first stage optical path to have a linear relationship with the input power percentage, and controlling the The current value in the second-stage optical circuit is zero, and when the input power percentage is equal to the reference ratio, the current value in the first-stage optical circuit is equal to the first current value, wherein the reference ratio is the The ratio of the primary power to the rated power of a pulsed laser. As a result, this method can adjust the output power of the pulsed laser from scratch, ensuring that it can also be adjusted to a smaller ideal output power in precision applications.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments are exemplarily described by using pictures in the accompanying drawings. These exemplary descriptions do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the drawings in the drawings do not constitute a limitation on scale.

FIG. 1 is a relationship diagram of a pulsed laser output power and an input power percentage in the prior art;

FIG. 2 is a current change diagram of a first-stage optical path and a second-stage optical path of a pulse laser in the prior art; FIG.

3 is a schematic flowchart of a method for adjusting the output power of a pulsed laser according to Embodiment 1 of the present application;

4 is a current change diagram of a first-stage optical path and a second-stage optical path of a pulsed laser in a method for adjusting the output power of a pulsed laser according to Embodiment 1 of the present application;

5 is another schematic flowchart of a method for adjusting the output power of a pulsed laser according to Embodiment 1 of the present application;

6 is a schematic flowchart of a step of obtaining a first current value corresponding to a first-level power when the output power of the pulse laser is the first embodiment of the present application;

7 is a schematic flowchart of a step of obtaining a second current value corresponding to the output power of the pulsed laser when the output power of the pulse laser is the rated power according to the first embodiment of the present application;

8 is a schematic structural diagram of a device for adjusting output power of a pulse laser according to Embodiment 2 of the present application;

FIG. 9 is a schematic structural diagram of a pulse laser according to an embodiment of the present application; FIG.

FIG. 10 is a schematic structural diagram of a laser marking machine according to an embodiment of the present application.

detailed description

In order to make the purpose, technical solution, and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

Further referring to FIG. 2, FIG. 2 is a current change diagram of a first-stage optical path and a second-stage optical path of a pulse laser in the current technology, where the X-axis is the input power percentage, the Y-axis is the current value, and the A-line is the first The current curve of the first stage optical path, the B line is the current curve of the second stage optical path. The current of the first stage optical path in the related technology is a constant value. The current of the first stage optical path is used to generate the laser of the first stage optical path. The current of the stage optical circuit has a linear relationship with the input power percentage, which increases with the increase of the input power percentage. Therefore, when the constant value of the current of the first stage optical circuit is larger, the corresponding value of the first stage power is also larger. The power impact on the entire pulsed laser will also be greater. It can be seen from Fig. 1 and Fig. 2 that the output power of the entire laser is not a complete linearization, but a local linearization. Therefore, the laser output power cannot be adjusted to a smaller value based on the power at point a.

The pulse laser referred to in the embodiments of the present application is a pulsed fiber laser, which may specifically be an acousto-optic Q-switched pulsed fiber laser.

Embodiment 1

Please refer to FIG. 3. FIG. 3 is a schematic flowchart of a method for adjusting output power of a pulsed laser according to Embodiment 1 of the present application. Embodiment 1 of the present application provides a method for adjusting output power of a pulsed laser. The method includes:

Step 101: Determine whether the input power percentage of the pulse laser is less than or equal to a reference ratio, and the reference ratio is a ratio of the first-level power and the rated power of the pulse laser;

The type of pulsed laser determines the first-level power W1 and rated power W2 of the pulsed laser. The first-level power W1 is the rated power of the first-stage optical circuit itself, and the rated power W2 of the pulsed laser is the overall rated power of the pulsed laser. Among them, the pulsed laser The first-order power W1 is smaller than the rated power W2 of the pulsed laser. The input power percentage of the pulse laser is the current input power of the pulse laser divided by the rated input power. The current input power of the pulse laser refers to the required output power included in the power command given to the laser according to actual needs. In the form of analog quantity. When the current input power of the pulse laser is zero, the input power percentage of the pulse laser is also zero at this time, and when the input power of the current pulse laser is equal to the rated input power, the input power percentage of the pulse laser is one at this time;

Further referring to FIG. 4, FIG. 4 is a current change diagram of the first-stage optical path and the second-stage optical path of the pulsed laser in the method for adjusting the output power of the pulsed laser according to Embodiment 1 of the present application, where the X-axis is the input power percentage and the Y-axis Is the current value, line A is the current curve of the first stage optical circuit, line B is the current curve of the second stage optical circuit, k is the reference ratio, k is equal to the ratio of the first-level power W1 and the rated power W2 of the pulsed laser, and I1 is The first current value, I2 is the second current value. Specifically, in the embodiment of the present application, the first-stage optical path of the pulse laser includes a first-stage pump source, a first-stage beam combiner, a first-stage amplifier, and a first-stage optical isolator. The second-stage optical path of the pulsed laser includes a two-stage pumped fiber, a two-stage pump source, a two-stage beam combiner, and a two-stage passive fiber. The primary pump source and the secondary pump source are respectively composed of one or more pump sources. Further, the line A in FIG. 4 is the driving current curve of the first-stage pump source of the first-stage optical circuit, and the line B is the driving current curve of the second-stage pump source of the second-stage optical circuit.

Step 102: if the input power percentage of the pulse laser is less than or equal to the reference ratio, determine whether the input power percentage of the pulse laser is equal to zero;

Step 103: when the input power percentage of the pulsed laser is equal to zero, the current value in the first-stage optical path of the pulsed laser and the current value in the second-stage optical path of the pulsed laser are both zero;

When the input power percentage of the pulsed laser is zero, the current values in the first-stage optical path and the second-stage optical path are both zero.

Step 104: when the input power percentage of the pulsed laser is greater than zero and less than or equal to the reference ratio, controlling the current value in the first stage optical path to have a linear relationship with the input power percentage, and controlling the current value in the second stage optical path to zero, And when the input power percentage is equal to the reference ratio, the current value of the first-stage optical path is equal to the first current value, where the reference ratio is the ratio of the first-level power and the rated power of the pulsed laser;

Please refer to FIG. 4 again. In step 104, the input power percentage of the pulsed laser is greater than zero and less than or equal to the reference ratio k, and the current value in the first stage optical path has a linear relationship with the input power percentage. When the input power percentage is equal to the reference ratio, At k, the current value of the first stage optical path is equal to the first current value, and the current value of the second stage optical path is still zero.

Step 105: When the input power percentage is greater than the reference ratio, control the current value in the first stage optical path to be the first current value, and control the current value in the second stage optical path to have a linear relationship with the input power percentage. When the input power percentage is equal to one, , The current value of the second stage optical path is equal to the second current value;

Please refer to FIG. 4 again. In step 105, when the input power percentage of the pulsed laser is greater than the reference ratio k and less than or equal to 1, the current value in the first stage optical path is always a constant value I1. When the ratio is k, the current value of the first-stage optical circuit is equal to the first current value, and the current value in the second-stage optical circuit is linear with the input power percentage. When the input power percentage is equal to one, the current value of the second-stage optical circuit is equal to the second Current value

Among them, the current value of the first stage optical path determines the output power of the first stage optical path, the current value of the second stage optical path and the output power of the first stage optical path determines the output power of the second stage optical path, and the output power of the second stage optical path determines Output power of a pulsed laser.

Further, although the first-order powers of different types of pulse lasers are the same, the first current value and the second current value of different types of pulse lasers are different. Therefore, please refer to FIG. 5 further, FIG. 5 is Another schematic flowchart of a method for adjusting the output power of a pulse laser according to the first embodiment of the present application. In the method of the first embodiment of the present application, before step 101, the method may further include the following steps 106 to 107, for obtaining the first First current value and second current value:

Step 106: Obtain a first current value corresponding to when the output power of the pulse laser is a first-level power. The first current value is a current value acting on the first-stage optical path of the pulse laser. Please refer to FIG. 6 further, step 106 further includes the following steps 1061 and 1062:

Step 1061: Adjust the output power of the first stage optical path to a first stage power;

Step 1062: Obtain the current value in the first-stage optical path at this time and use it as the first current value.

Step 107: Obtain a second current value corresponding to when the output power of the pulse laser is the rated power, and the second current value is a current value acting on the second-stage optical path of the pulse laser. Please refer to FIG. 7 further, step 107 further includes the following steps 1071 and 1072:

Step 1071: Maintain the current value in the first stage optical path to the first current value, and adjust the output power of the pulsed laser to the rated power;

Wherein, this step is specifically to maintain the current value of the first-stage pump source in the first-stage optical path to the first current value, and adjust the current value of the second-stage pump source in the second-stage optical path until the output power of the pulse laser is adjusted to rated power.

Step 1072: Obtain the current value in the second-stage optical path at this time and use it as the second current value.

In the first embodiment of the present application, the method for adjusting the output power of a pulse laser includes: obtaining a first current value corresponding to the output power of the pulse laser when the output power of the pulse laser is a first-level power; Two current values; when the input power percentage of the pulsed laser is equal to zero, the current value in the first-stage optical path controlling the pulsed laser and the current value in the second-stage optical path of the pulsed laser are both zero; when the input power percentage of the pulsed laser is greater than When it is zero and less than or equal to the reference ratio, the current value in the first-stage optical path is controlled to have a linear relationship with the input power percentage, and the current value in the second-stage optical path is controlled to be zero. When the input power percentage is equal to the reference ratio, the first The current value of the first-stage optical circuit is equal to the first current value; when the input power percentage is greater than the reference ratio, the current value in the first-stage optical circuit is controlled to the first current value, and the current value in the second-stage optical circuit is proportional to the input power percentage. Linear relationship, when the input power percentage is equal to one, the current value of the second stage optical circuit, etc. Second current value. In this way, the output power of the pulsed laser can be adjusted from zero to the ideal smaller output power, ensuring that in precision applications, it can also be adjusted to the smaller ideal output power to meet more user requirements. To improve user experience. Moreover, because the output power of the primary optical path can be adjusted from zero, the optional power range of the pump source of the primary optical path in the pulsed laser is larger. For example, the lower power pump source can only be used. Pump source forward pump or reverse pump, or forward and reverse pump to obtain higher power output, after using the solution of the embodiment of the present application, a higher power pump source can be used instead A lower power pump source, more flexible choice of pump source, more suitable for industrial development and industrial processing needs, and a higher power pump source instead of multiple lower power pump sources is more cost-effective .

Embodiment 2

Please refer to FIG. 8. FIG. 8 is a schematic structural diagram of a device for adjusting output power of a pulse laser according to Embodiment 2 of the present application. Embodiment 2 of the present application provides a device 20 for adjusting output power of a pulse laser. The device 20 includes: a first control module 21. The second control module 22, the third control module 23, the first acquisition module 24, the second acquisition module 25, the first judgment module 26, and the second judgment module 27.

A device for adjusting the output power of a pulsed laser includes:

A first determining module 26, configured to determine whether the input power percentage of the pulsed laser is less than or equal to a reference ratio;

A second determination module 27 is configured to determine whether the input power percentage of the pulsed laser is equal to zero if the input power percentage of the pulsed laser is less than or equal to a reference ratio; the first control module 21 is used to determine when the input power percentage of the pulsed laser is equal to zero At this time, the current value in the first-stage optical path of the pulsed laser and the current value in the second-stage optical path of the pulsed laser are both zero;

The second control module 22 is configured to control the linear relationship between the current value in the first stage optical path and the input power percentage when the input power percentage of the pulsed laser is greater than zero and less than or equal to the reference ratio, and control the second stage optical path. The current value of is zero, and when the input power percentage is equal to the reference ratio, the current value of the first-stage optical path is equal to the first current value, where the reference ratio is the ratio of the first-level power and the rated power of the pulsed laser;

The third control module 23 is configured to control the current value in the first stage optical path to be the first current value when the input power percentage is greater than the reference ratio, and to control the current value in the second stage optical path to have a linear relationship with the input power percentage. When the input power percentage is equal to one, the current value of the second-stage optical circuit is equal to the second current value;

Optionally, a first obtaining module 24 is configured to obtain a first current value corresponding to the output power of the pulse laser when the output power of the pulse laser is a first-level power, and the first current value is a current value acting on a first-stage optical path of the pulse laser;

The second acquisition module 25 is configured to acquire a second current value corresponding to the output power of the pulse laser when the output power is the rated power, and the second current value is a current value acting on the second-stage optical path of the pulse laser.

Optionally, the first obtaining module 24 includes:

A first adjustment unit 241, configured to adjust the output power of the first-stage optical circuit to a first-stage power;

The first obtaining unit 242 is configured to obtain a current value in the first-stage optical path and use the current value as a first current value.

Optionally, the second obtaining module 25 includes:

A second adjustment unit 251, configured to maintain the current value in the first-stage optical path to a first current value, and adjust the output power of the pulsed laser to a rated power;

The second obtaining unit 252 is configured to obtain a current value in the second-stage optical path and use the current value as a second current value.

Optionally, the first-level power and rated power are determined by the type of the pulse laser, where the first-level power is less than the rated power.

The device embodiment of the second embodiment of the present application and the method embodiment of the first embodiment of the present application are based on the same application concept. For specific content and beneficial effects of the second embodiment of the present application, please refer to the content of the first embodiment of the present application. One by one.

It is worth noting that those skilled in the art should be further aware that the steps of the method for adjusting the output power of a pulsed laser described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To implement, in order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the composition or steps of various embodiments in terms of functions. Whether these functions are performed in hardware or software depends on the technology. Specific application and design constraints for the solution.

Please refer to FIG. 9, which is a schematic structural diagram of a pulse laser according to an embodiment of the present application. As shown in FIG. 9, the pulse laser 100 includes: a controller 11, a first-stage optical path 12, and a second-stage optical path 13;

The first-stage optical circuit 12 includes a first-stage pump source; the second-stage optical circuit 13 includes a second-stage pump source; the controller 11 is connected to the first-stage optical circuit 12 and the second-stage optical circuit 13 respectively, and the controller 11 is used for When the input power percentage of the pulse laser 100 is equal to zero, the current value of the primary pump source and the current value of the secondary pump source are both zero; and when the input power percentage of the pulse laser 100 is greater than zero and less than or equal to the reference ratio , The current value of the primary pump source is linearly related to the input power percentage, and the current value of the secondary pump source is zero, and when the input power percentage is equal to the reference ratio, the current value of the primary pump source is Is equal to the first current value, wherein the reference ratio is the ratio of the first-level power and the rated power of the pulsed laser 100; and when the input power percentage is greater than the reference ratio, the current value of the control of the first-stage pump source is the first current value, The current value of controlling the secondary pump source has a linear relationship with the input power percentage. When the input power percentage is equal to one, the current value of the secondary pump source is equal to the second current value; The current value of the first-stage pump source determines the output power of the first-stage optical circuit 12, and the current value of the second-stage pump source and the output power of the first-stage optical circuit 12 determines the output power of the second-stage optical circuit 13. The output power of the optical path 13 determines the output power of the pulse laser 100. Optionally, the controller 11 is further configured to obtain a first current value corresponding to when the output power of the pulse laser 100 is a first-level power, and the first current value is a current value acting on the first-stage optical path 12 of the pulse laser 100 And obtaining a second current value corresponding to when the output power of the pulse laser 100 is a rated power, and the second current value is a current value acting on the second-stage optical path 13 of the pulse laser 100.

In the embodiment of the present application, the pulse laser 100 includes a controller 11, a first-stage optical path 12, and a second-stage optical path 13. The first-stage optical circuit 12 includes a first-stage pump source (not shown), a first-stage combiner (not shown), a first-stage amplifier (not shown), and a first-stage optical isolator (not shown). The second-stage optical path 13 includes a two-stage pumped optical fiber (not shown), a two-stage pumped source (not shown), a two-stage beam combiner (not shown), and a two-stage passive optical fiber (not shown). The primary pump source and the secondary pump source are respectively composed of one or more pump sources. Further, the line A in FIG. 4 is the driving current curve of the first-stage pump source of the first-stage optical circuit, and the line B is the driving current curve of the second-stage pump source of the second-stage optical circuit. The controller 11 is used to control the current in the first-stage optical path 12 and the second-stage optical path 13 so that the output power of the pulse laser can be adjusted from zero, and then adjusted to the ideal smaller output power to ensure precision applications. It can also be adjusted to a smaller ideal output power to meet more user requirements and improve user experience.

Please refer to FIG. 10, which is a schematic structural diagram of a laser marking machine according to an embodiment of the present application. As shown in FIG. 10, the laser marking machine 200 includes a host computer 201, a marking table 202, and a galvanometer assembly 203. The host computer 201 includes a marking board 2011. The marking board 2011 is separately connected to the host machine 201 and a pulse laser. The control circuit of 100 is connected. The host computer 201 controls the pulse laser 100 through the marking board 2011. The marking table 202 is used to carry the marked object (not labeled). The support of the marking table 202 can be raised and lowered according to the need for focusing. , The galvanometer assembly 203 is mounted on the support frame. The pulse laser 100 further includes a laser output head 13. The laser of the pulse laser 100 is output to the galvanometer component 203 through the laser output head 13, and marks the object to be marked on the marking table 202 via the galvanometer component 203. The galvanometer assembly 203 includes a galvanometer (not shown) and a field lens (not shown). The device embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, may be located One place, or it can be distributed across multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the objective of the solution of this embodiment.

Through the description of the above embodiments, a person of ordinary skill in the art can clearly understand that the embodiments can be implemented by means of software plus a general hardware platform, and of course, also by hardware. A person of ordinary skill in the art can understand that all or part of the processes in the method of the foregoing embodiment can be completed by using a computer program to instruct related hardware. The program can be stored in a computer-readable storage medium. When executed, the processes of the embodiments of the methods described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random, Access Memory, RAM).

The above is only an implementation of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present application, or directly or indirectly applied to other related technologies The fields are equally included in the patent protection scope of this application.

Claims

A method for adjusting the output power of a pulsed laser, comprising:

Judging whether the input power percentage of the pulse laser is less than or equal to a reference ratio, where the reference ratio is a ratio of the first-level power and the rated power of the pulse laser;

If yes, determine whether the input power percentage of the pulsed laser is equal to zero;

When the input power percentage of the pulsed laser is equal to zero, the current value in the first stage optical path controlling the pulsed laser and the current value in the second stage optical path of the pulsed laser are both zero;

When the input power percentage of the pulsed laser is greater than zero and less than or equal to the reference ratio, controlling the current value in the first-stage optical path to have a linear relationship with the input power percentage, and controlling the The current value is zero, and when the input power percentage is equal to the reference ratio, the current value of the first-stage optical circuit is equal to the first current value.
The method according to claim 1, further comprising:

When the input power percentage is greater than the reference ratio, controlling the current value in the first stage optical path to a first current value, and controlling the current value in the second stage optical path to have a linear relationship with the input power percentage , When the input power percentage is equal to one, the current value of the second stage optical path is equal to the second current value;

The current value of the first-stage optical circuit determines the output power of the first-stage optical circuit, and the current value of the second-stage optical circuit and the output power of the first-stage optical circuit determine the output of the second-stage optical circuit. Power, the output power of the second stage optical path determines the output power of the pulse laser.
The method according to claim 2, characterized in that, when the input power percentage of the pulsed laser is equal to zero, controlling a current value in a first-stage optical path of the pulsed laser and a second value of the pulsed laser Before the step in which the current values in the first-order optical paths are all zero, the method further includes:

Acquiring a first current value corresponding to when the output power of the pulse laser is a first-level power, and the first current value is a current value acting on a first-stage optical path of the pulse laser;

A second current value corresponding to when the output power of the pulse laser is a rated power is obtained, and the second current value is a current value acting on a second-stage optical path of the pulse laser.
The method according to claim 3, wherein:

The step of obtaining a first current value corresponding to when the output power of the pulsed laser is a first-level power includes:

Adjusting the output power of the first stage optical path to the first stage power;

The current value in the first-stage optical path is obtained and used as the first current value.
The method according to claim 4, wherein:

The step of obtaining a second current value corresponding to when the output power of the pulsed laser is a rated power includes:

Maintaining the current value in the first-stage optical path to a first current value, and adjusting the output power of the pulse laser to a rated power;

The current value in the second-stage optical path is obtained and used as the second current value.
The method according to claim 5, wherein:

The step of maintaining the current value in the first-stage optical path to a first current value and adjusting the output power of the pulsed laser to a rated power includes:

Maintaining the current value of the first-stage pump source in the first-stage optical path as the first current value, and then adjusting the current value of the second-stage pump source in the second-stage optical path until the output power of the pulse laser is adjusted to rated power.
The method according to any one of claims 1-6, wherein:

The first-stage optical path of the pulse laser includes a first-stage pump source, a first-stage beam combiner, a first-stage amplifier, and a first-stage optical isolator;

The second-stage optical path of the pulse laser includes a two-stage pumped fiber, a two-stage pump source, a two-stage beam combiner, and a two-stage passive fiber;

The primary pump source and the secondary pump source are each composed of one or more pump sources.
A device for adjusting the output power of a pulsed laser is characterized in that it includes:

A first determining module, configured to determine whether an input power percentage of the pulsed laser is less than or equal to a reference ratio;

A second judgment module, configured to determine whether the input power percentage of the pulse laser is equal to zero if the input power percentage of the pulse laser is less than or equal to a reference ratio;

A first control module configured to control a current value in a first-stage optical path of the pulse laser and a current value in a second-stage optical path of the pulse laser when the input power percentage of the pulse laser is equal to zero; zero;

A second control module, configured to control a linear relationship between the current value in the first-stage optical path and the input power percentage when the input power percentage of the pulsed laser is greater than zero and less than or equal to a reference ratio, and control The current value in the second-stage optical circuit is zero, and when the input power percentage is equal to the reference ratio, the current value in the first-stage optical circuit is equal to the first current value, wherein the reference ratio is The ratio of the first power and rated power of the pulsed laser is described.
The apparatus according to claim 8, further comprising:

A third control module, configured to control the current value in the first stage optical path to a first current value when the input power percentage is greater than the reference ratio, and to control the current value in the second stage optical path and The input power percentage has a linear relationship. When the input power percentage is equal to one, the current value of the second-stage optical circuit is equal to the second current value.

The current value of the first-stage optical circuit determines the output power of the first-stage optical circuit, and the current value of the second-stage optical circuit and the output power of the first-stage optical circuit determine the output of the second-stage optical circuit. Power, the output power of the second stage optical path determines the output power of the pulse laser.
The apparatus according to claim 9, further comprising:

A first acquisition module, configured to acquire a first current value corresponding to an output power of the pulse laser when the output power is a first-level power, and the first current value is a current value acting on a first-stage optical path of the pulse laser ; Wherein the first acquisition module includes a first adjustment unit and a first acquisition unit, the first adjustment unit is used to adjust the output power of the first-stage optical path to the first-stage power; the first acquisition unit is used to obtain The current value in the first stage optical path is taken as the first current value;

A second obtaining module, configured to obtain a second current value corresponding to the output power of the pulse laser when the output power is the rated power, and the second current value is a current value acting on a second-stage optical path of the pulse laser; The second obtaining module includes a second adjusting unit and a second obtaining unit. The second adjusting unit is configured to maintain a current value in the first-stage optical path to a first current value and adjust an output of the pulse laser. Power to rated power; the second obtaining unit is configured to obtain a current value in the second-stage optical path and use it as a second current value.
The device according to any one of claims 8 to 10, wherein:

The first-stage optical path of the pulse laser includes a first-stage pump source, a first-stage beam combiner, a first-stage amplifier, and a first-stage optical isolator;

The second-stage optical path of the pulse laser includes a two-stage pumped fiber, a two-stage pump source, a two-stage beam combiner, and a two-stage passive fiber;

The primary pump source and the secondary pump source are each composed of one or more pump sources.
A pulsed laser, comprising:

A first stage optical path, which includes a first stage pump source;

A second-stage optical path, which includes a second-stage pump source;

A controller, which is respectively connected to the first-stage optical path and the second-stage optical path, and the controller is configured to control the current value of the first-stage pump source and The current value of the secondary pump source is all zero; and when the input power percentage of the pulsed laser is greater than zero and less than or equal to a reference ratio, controlling the current value of the primary pump source and the input The power percentage has a linear relationship, and the current value of controlling the secondary pump source is zero, and when the input power percentage is equal to the reference ratio, the current value of the primary pump source is equal to the first current value Wherein the reference ratio is the ratio of the first-level power and the rated power of the pulsed laser; and when the input power percentage is greater than the reference ratio, the current value of the first-stage pump source is controlled to be A current value, which controls the current value of the secondary pump source and the input power percentage to have a linear relationship. When the input power percentage is equal to one, the current of the secondary pump source Equal to a second current value;

The current value of the first-stage pump source determines the output power of the first-stage optical circuit, and the current value of the second-stage pump source and the output power of the first-stage optical circuit determine the second-stage optical circuit. The output power of the second-stage optical path determines the output power of the pulsed laser.
The pulsed laser according to claim 12, wherein:

The controller is further configured to obtain a first current value corresponding to when the output power of the pulse laser is a first-level power, and the first current value is a current value acting on a first-stage optical path of the pulse laser. And obtaining a second current value corresponding to when the output power of the pulse laser is a rated power, and the second current value is a current value acting on a second-stage optical path of the pulse laser.
A laser marking machine, comprising:

A pulsed laser according to claim 12 or 13.