CN106785857B

CN106785857B - The current adjusting method and relevant apparatus and equipment of laser

Info

Publication number: CN106785857B
Application number: CN201611145955.1A
Authority: CN
Inventors: 唐熊忻; 邱基斯; 樊仲维; 王昊成; 刘昊; 刘悦亮
Original assignee: Academy of Opto Electronics of CAS
Current assignee: Academy of Opto Electronics of CAS
Priority date: 2016-12-13
Filing date: 2016-12-13
Publication date: 2019-05-31
Anticipated expiration: 2036-12-13
Also published as: CN106785857A

Abstract

The embodiment of the present invention provides a kind of current adjusting method of laser and relevant apparatus and equipment, the current adjusting method of the laser include: the target output energy for obtaining laser；Obtain the operating temperature of laser；Inquire the relationship of corresponding with operating temperature preset output energy and electric current；According to the relationship of output energy and electric current, determining electric current corresponding with target output energy adjusts the electric current of laser to the electric current of the determination.The embodiment of the present invention enables to laser to reach the output energy of target desired by user, and the output energy of laser is made to keep stablizing.

Description

Current adjusting method of laser and related device and equipment

Technical Field

The present invention relates to the field of laser technologies, and in particular, to a current adjustment method for a laser, and a related apparatus and device.

Background

In the prior art, a laser amplifier with a side pump of a laser diode array includes a working medium and a pump source surrounding the working medium. The working medium is usually yttrium aluminum Garnet (Nd: YAG, Neodymium-doped yttrium aluminum Garnet (Nd: Y3Al5O12) crystal rod, the pump source is composed of a plurality of monochromatic laser bars (bar), and the crystal rod is used for absorbing the light emitted by the pump source and realizing photon transition.

The defects in the prior art are as follows: as the environment changes, the output energy of the laser amplifier also changes and cannot be kept stable.

Disclosure of Invention

The invention mainly solves the technical problem of providing a current adjusting method of a laser, and a related device and equipment, which can keep the output energy of the laser stable.

In order to solve the above technical problem, one technical solution adopted by the embodiment of the present invention is: provided is a current adjustment method of a laser, including:

acquiring target output energy of a laser;

acquiring the working temperature of the laser;

inquiring the relation between preset output energy corresponding to the working temperature and current;

determining a current corresponding to the target output energy according to the relation between the output energy and the current, and adjusting the current of the laser to the determined current; after adjusting the current of the laser to the determined current, the method further comprises:

acquiring actual output energy of the laser;

and when the difference value of the actual output energy and the target output energy exceeds a preset threshold value, adjusting the current of the laser according to the actual output energy and the target output energy according to a preset algorithm until the difference value of the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

The method for acquiring the target output energy of the laser specifically comprises the following steps: the locally stored target output energy of the laser is read.

The method specifically comprises the following steps of obtaining the working temperature of the laser: and the temperature sensor measures the working temperature of the laser after the laser is started stably.

The method specifically comprises the following steps of obtaining the working temperature of the laser: and acquiring the preset working temperature of the laser.

In order to solve the above technical problem, another technical solution adopted by the embodiment of the present invention is: provided is a current adjusting apparatus of a laser, including:

the first acquisition module is used for acquiring target output energy of the laser;

the second acquisition module is used for acquiring the working temperature of the laser;

the query module is used for querying the relation between preset output energy corresponding to the working temperature and current;

the first adjusting module is used for determining a current corresponding to target output energy according to the relation between the output energy and the current, and adjusting the current of the laser to the determined current;

the third acquisition module is used for acquiring the actual output energy of the laser after the current of the laser is adjusted to the determined current;

and the second adjusting module is used for adjusting the current of the laser according to the actual output energy and the target output energy and a preset algorithm when the difference value of the actual output energy and the target output energy exceeds a preset threshold value until the difference value of the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

Wherein, first acquisition module includes: and the reading unit is used for reading the target output energy of the laser stored locally.

Wherein, the second acquisition module includes: and the temperature sensor is used for measuring the working temperature of the laser after the laser is started stably.

In order to solve the above technical problem, another technical solution adopted by the embodiment of the present invention is: there is provided a current adjusting apparatus of a laser, including:

at least one processor; and

a memory coupled to the at least one processor; wherein,

the memory stores a program of instructions executable by the at least one processor to cause the at least one processor to:

acquiring target output energy of a laser;

acquiring the working temperature of the laser;

determining a current corresponding to the target output energy according to the relation between the output energy and the current, and adjusting the current of the laser to the determined current;

after adjusting the current of the laser to the determined current, the method further comprises:

acquiring actual output energy of the laser;

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, the relation between the corresponding current and the output energy is inquired according to the working temperature of the laser, the current corresponding to the target output energy is determined according to the relation, and the current of the laser is adjusted to the determined current, so that the laser can reach the target output energy expected by a user, and the output energy of the laser is kept stable.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a diagram showing an absorption spectrum of a Nd: YAG crystal;

FIG. 2 is a schematic diagram of the structure of one embodiment of a laser of the present invention;

FIG. 3 is a side view of the embodiment shown in FIG. 2;

FIG. 4 is a schematic diagram of an embodiment of the laser bar stack 210 of the embodiment shown in FIG. 2;

FIG. 5 is a schematic diagram of one embodiment of the partitioning of the laser bar stack 210 of the embodiment shown in FIG. 2;

FIG. 6 is a schematic diagram of another embodiment of the partitioning of the laser bar stack 210 of the embodiment shown in FIG. 2;

FIG. 7 is a schematic flow chart diagram illustrating one embodiment of a method for adjusting the current of a laser in accordance with the present invention;

FIG. 8 is a schematic diagram of one particular application of the embodiment shown in FIG. 7;

FIG. 9 is a schematic flow chart illustrating a method for adjusting the current of a laser according to another embodiment of the present invention;

FIG. 10 is a schematic diagram of the structure of one embodiment of the current adjustment apparatus of the laser of the present invention;

FIG. 11 is a schematic structural diagram of another embodiment of a current adjustment apparatus for a laser according to the present invention;

FIG. 12 is a schematic diagram of the structure of one embodiment of a laser system of the present invention;

FIG. 13 is a schematic structural diagram of another embodiment of a laser system of the present invention;

FIG. 14 is a schematic diagram of the structure of one embodiment of a current regulation device for a laser of the present invention;

FIG. 15 is a schematic diagram of the structure of one embodiment of a current regulation device for a laser of the present invention;

FIG. 16 is a schematic flow chart diagram illustrating one embodiment of a laser control method of the present invention;

FIG. 17 is a schematic flow chart diagram of another embodiment of a laser control method of the present invention;

FIG. 18 is a schematic flow chart diagram of another embodiment of a laser control method of the present invention;

FIG. 19 is a schematic structural diagram of one embodiment of a laser control apparatus of the present invention;

FIG. 20 is a schematic structural diagram of another embodiment of a laser control apparatus of the present invention;

FIG. 21 is a schematic structural diagram of another embodiment of a laser control apparatus of the present invention;

fig. 22 is a schematic structural view of one embodiment of the laser control apparatus of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

For convenience of description, the following [ A, B ] represents A or more and B or less; and [ A, B ] represents A or more and less than B.

Referring to FIG. 1, FIG. 1 is an absorption spectrum of a Nd: YAG crystal. As shown in FIG. 1, the absorption spectrum of a Nd: YAG crystal is from 300nm to 950nm, but the dominant wavelength is 808nm, the absorption efficiency of [795nm, 815nm ] around the dominant wavelength is high, and the absorption efficiency in other bands is low. In lasers (e.g., laser amplifiers), a pump source laser bar emits light having a spectrum that is absorbed by Nd: YAG, which absorbs the light and effects photonic transitions.

In the prior art, the pump source of the laser amplifier is composed of monochromatic bars, for example, laser bars with main wavelength of 808nm, the emission spectrum of which is located at [ 808-3, 808 + 3] nm, 3 is the line width (full width at half maximum), and is located near the main wavelength of the Nd: YAG crystal.

When the temperature of the pump source changes, the emission spectrum of the pump source may drift out of the range of 795nm-815nm, resulting in the inability of the Nd: YAG crystal to efficiently absorb the pump source light. For example, the emission spectrum of the pump source at 20 ℃ is 808 +/-3 nm, and the emission spectrum is generally shifted by 1nm every 3 degrees of temperature change, so that the emission spectrum of the pump source at 50 ℃ is 818nm +/-3 nm, and the Nd: YAG crystal cannot effectively absorb the light of the pump source, so that the laser amplifier cannot work. It should be noted here that the present invention is concerned with whether the emission spectrum of the pump source is shifted beyond the dominant wavelength of the working medium, e.g., 808nm for Nd: YAG.

The main inventive thought of the invention is as follows: in the pumping source, at least two laser bars with different dominant wavelengths are provided, and a spectrum formed by the at least two laser bars with different dominant wavelengths is continuous in a wavelength range near the dominant wavelength of the working medium, that is, the spectrum of the pumping source is near the dominant wavelength of the working medium and has a certain line width, so that the spectrum after the drift of the pumping source still covers the dominant wavelength of the working medium under the condition that the temperature change does not exceed a threshold value.

For example, when the working medium is Nd: YAG crystal, the dominant wavelength of the working medium is 808nm, then two laser bars with dominant wavelengths can be provided, the formed spectrum is continuous in the wavelength range of [802, 808] nm at the temperature of 25 ℃, and the two dominant wavelengths can be respectively 802nm and 808 nm. With the temperature rise, the spectrum formed by the two laser bars, namely the spectrum of the pumping source can shift to the long wavelength, but because the spectral line width is 6nm, as long as the temperature rise amplitude does not exceed 18 ℃ (the spectrum shifts by 1nm for each 3 ℃ change of temperature, which is determined by the production characteristics of the laser bars, and the laser bars of different manufacturers can be different), the spectrum of the pumping source can not shift to 808nm, so that the temperature range of [25, 43] DEG C can be adapted.

Accordingly, in an embodiment of the present invention, there is provided a laser comprising:

a pump source including at least two laser bars with different dominant wavelengths, the spectrum composed of the at least two laser bars with different dominant wavelengths being continuous in a specific wavelength range at a temperature T, at least a partial range of the specific wavelength range being [ M-6, M ] nanometer or [ M-3, M < + > 3] nanometer or [ M, M < + > 6] nanometer;

the working medium has a dominant wavelength of absorption spectrum of M nanometer, and is used for absorbing light emitted by the pumping source and realizing photon transition.

In particular, the laser may be a laser amplifier or a laser oscillator or other laser device capable of effecting photonic transitions.

In the invention, the dominant wavelength of the working medium is M nanometers, and the pumping source comprises at least two laser bars with different dominant wavelengths (the dominant wavelength of the laser bars is measured at the temperature T), and the spectrum formed by the at least two laser bars with different dominant wavelengths is continuous in the wavelength range of [ M-6, M ] nanometers at the temperature T, so that the spectrum of the pumping source can not drift out of M nanometers at least when the temperature is increased by 18 ℃ and the spectrum is calculated by 1nm when the temperature is changed by 3 ℃, and the laser can at least adapt to the temperature range of [ T, T +18] ° C.

Similarly, when the spectrum composed of at least two laser bars with different dominant wavelengths is continuous in the wavelength range of [ M < -3 >, M < + > 3] nanometer at the temperature T, the laser can adapt to the temperature range of [ T < -9 >, T < + > 9 > ] C; when the spectrum composed of at least two laser bars with different dominant wavelengths is continuous in the wavelength range of [ M, M + <6 ] nanometer at the temperature T, the laser can at least adapt to the temperature range of [ T < -18 >, T ] ° C.

Therefore, the laser in the invention can adapt to the environment with large temperature change, such as satellite-borne and airborne environments. In addition, the laser does not need a water cooling technology, and the problem of increase of volume and weight caused by water cooling can be avoided.

Preferably, at least part of the specific wavelength range is [ M-6, M + 6] nm, and the laser can at least adapt to the temperature range of [ T-18, T +18] ° C, i.e. to the temperature change of at least 36 ℃. More preferably, at least part of the specific wavelength range is [ M-10, M + 10] nm, and the laser can at least adapt to the temperature range of [ T-30, T +30] ° C, i.e. to the temperature change of 60 ℃.

The embodiments of the present invention will be described in detail below with reference to the drawings and the embodiments.

Referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic structural diagram of an embodiment of a laser according to the present invention, fig. 3 is a side view of the embodiment shown in fig. 2, and fig. 4 is a schematic structural diagram of an embodiment of a laser bar stack 210 of the embodiment shown in fig. 2. As shown in fig. 2 and fig. 3, the laser 200 includes a pump source and a working medium 220, the pump source includes 3 laser bar stacks 210, the 3 laser bar stacks 210 are disposed around the working medium 220, and the working medium 220 absorbs light emitted from the stacks 210 and realizes photon transition.

The working medium 220 is Nd-YAG crystal bar, and the dominant wavelength is 808 nm. The laser bar array 210 is formed by arranging 5 laser bars with different main wavelengths, and the laser bars can be formed by arranging a plurality of laser diodes. The spectra of the laser bars with 5 different dominant wavelengths are continuous in a specific wavelength range at a temperature of 20 ℃, the specific wavelength range is [795, 815] nm, so that the spectrum of the laser bar stack does not drift out of 808nm at least in the temperature range of [ -1, 59] ° c, calculated as 1nm for each 3 ℃ spectral shift in temperature, i.e. the laser can adapt to at least the temperature range of [ -1, 59] ° c.

Specifically, the 5 different dominant wavelengths are 795nm, 800 nm, 805nm, 810nm and 815nm, respectively. Of course, the 5 different dominant wavelengths may be other, such as 794 nm, 800 nm, 806 nm, 811 nm and 816 nm, and the number of dominant wavelengths may be other than 5, such as 3 or 4 or 6 … …, as long as the spectrum composed of laser bars of different dominant wavelengths continues in the specific wavelength range [795, 815] nm at a temperature of 20 ℃.

As shown in fig. 4, the laser bar stack 210 may include at least one partition 211, and each partition may include at least two groups of laser bars, where each group of laser bars is at least two laser bars with the same main wavelength. Specifically, the laser bar array 210 includes a plurality of partitions i and ii … …, each partition includes A, B, C, D, E groups of 5 laser bars, and each group of laser bars is at least two laser bars with the same main wavelength. A. B, C, D, E the main wavelengths of the 5 groups of laser bars are 795nm, 800 nm, 805nm, 810nm and 815nm respectively; in the same partition, A, B, C, D, E groups of laser bars are arranged in sequence along the horizontal direction; the laser bars of the same group (e.g., group a) are vertically pumped.

Furthermore, as shown in FIG. 2, if the same cross-section of the crystal rod 220 is pumped with multi-color bars, the fluorescence distribution will be non-uniform. For example, pumping with laser bars having dominant wavelengths of 795nm, 805nm, and 810nm at the same cross-section results in non-uniform fluorescence distribution because the dominant wavelength of the crystal rod 220 is 808nm, which absorbs more at 805nm and less at 795 nm. Therefore, preferably, the 3 laser bar stacked arrays 210 are symmetrically arranged with the crystal bar 220 as a central axis, and the laser bars located on the same cross section of the crystal bar 220 are laser bars with the same main wavelength, for example, all the laser bars are group a laser bars, so that the fluorescence distribution is uniform.

Further, the laser in this embodiment is preferably arranged hermetically and may be filled with nitrogen gas to prevent dew condensation.

In this embodiment, the dominant wavelength of the working medium is 808nm, and since the spectrum composed of the laser bars with 5 different dominant wavelengths of the pumping source is continuous at [795, 815] nm at 20 ℃, the laser can adapt to the temperature range of [ -1, 59] ° c calculated by the spectral shift of 1nm for every 3 ℃ change in temperature, and can adapt to environments with large temperature changes, such as satellite-borne and airborne environments. In addition, the laser of the embodiment does not need to use a water cooling technology, and the problem of increase of volume and weight caused by water cooling can be avoided.

This example illustrates 5 different dominant wavelengths, and the specific wavelength range is [795, 815] nm. In other embodiments, the specific wavelength range may be other ranges, such as [800, 820] nm, which may be set according to the temperature range to be adapted; the pump source may also be formed by an arrangement of 2 or 3 or 4 laser bars of … … different main wavelengths.

For example, the pumping source is formed by arranging 2 laser bars with different main wavelengths, and the specific wavelength range can be [802, 808] nanometer, so that the laser can adapt to the temperature range of [20, 38] ° c; specifically, the 2 different dominant wavelengths may be 802 nanometers and 808 nanometers, respectively.

For another example, the pump source may also be formed by arranging 12 laser bars with different main wavelengths, and the specific wavelength range may be [783, 838] nm, so that the laser can adapt to the temperature range of [ -70, 95] ° c; specifically, the 12 different dominant wavelengths may be 783 nm, 788 nm, 793 nm, 798 nm, 803 nm, 808nm, 813 nm, 818nm, 823 nm, 828 nm, 833 nm, and 838 nm, respectively.

In this example, a working medium is Nd, a YAG crystal is used as an example for explanation. In other embodiments, the working medium may be other substances capable of absorbing light and performing photon transition, such as Nd: glass crystal, dominant wavelength is 802nm at 20 ℃. Similarly, there may be a pumping source formed by arranging at least two laser bars with different main wavelengths, and the specific wavelength range may be set differently according to different requirements. For example, the pump source may include laser bars with 6 different main wavelengths, and the specific wavelength range may be [793, 818] nm, so that the laser can be adapted to the temperature range of [ -28, 47 ]; specifically, the 6 different dominant wavelengths may be 793 nm, 798 nm, 803 nm, 808nm, 813 nm, and 818nm, respectively.

The structure of each section in the laser bar array can also adopt other modes. For example, referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of the partition of the laser bar stack 210 of the embodiment shown in fig. 2. As shown in fig. 5, the partition 511 of the laser bar array includes 5 groups of laser bars, where each group of laser bars is at least two laser bars with the same main wavelength; A. b, C, D, E groups of laser bars are arranged in sequence along the horizontal direction, and the laser bars in the same group are arranged in a horizontal pumping way. Of course, the laser bars of different groups may be arranged in sequence along the vertical direction.

For another example, referring to fig. 6, fig. 6 is a schematic structural diagram of another embodiment of the partition of the laser bar stack 210 of the embodiment shown in fig. 2. As shown in fig. 6, the partitions 611 of the laser bar array include at least two laser bars with different wavelengths (specifically, 5 laser bars of A, B, C, D, E), and the laser bars of the same partition are vertically pumped.

It can be understood that, no matter how the laser bars of the pump source are arranged, the laser bars can be connected in series, so as to uniformly control the current of all the laser bars. Or laser bars with the same main wavelength can be connected in series.

In using lasers, users often require that the laser be able to reach a target output energy. Therefore, in the embodiment of the invention, the invention further provides a current adjusting method of the laser. Referring to fig. 7, fig. 7 is a schematic flowchart illustrating a current adjusting method of a laser according to an embodiment of the present invention. As shown in fig. 7, the present embodiment includes:

step 701, acquiring target output energy of a laser;

the laser may be the laser in the above embodiment, and please refer to the above embodiment for a detailed description; or various lasers known in the art.

The execution main body of the embodiment may be a current adjustment device of the laser, and the device may be an external independent device of the laser or an internal device integrated in the laser.

The target output energy may be preset by a user, and step 701 may specifically be to read the target output energy of the locally stored laser. Of course, step 701 may specifically receive the target output energy of the laser sent by the user in real time.

Step 702, acquiring the working temperature of a laser;

the working temperature of the laser mainly refers to the temperature of a heat sink of a laser bar of the laser when the laser works. The current adjusting device of the laser may include a temperature sensor, and step 702 may specifically be that the temperature sensor measures the operating temperature of the laser after the laser is stably turned on.

Since the working temperature of the laser mainly depends on the working environment, current, power and other conditions of the laser, the working temperature of the laser under different conditions can be preset according to experience. Therefore, the user may send the corresponding operating temperature according to the current condition, and step 702 may specifically also be receiving the preset operating temperature sent by the user.

Step 701 is not necessarily in chronological order with step 702.

Step 703, inquiring the relation between preset output energy corresponding to the working temperature and the current;

since the output energy of the laser has a different relationship to the current at different operating temperatures, the relationship between the current and the output energy of the laser can be measured at different operating temperatures before the laser is used onboard, on-board, etc. When the laser is used on an airborne vehicle or a satellite, the relation between current and output energy is inquired according to the working temperature of the laser.

Step 704, determining a current corresponding to the target output energy according to the relationship between the output energy and the current, and adjusting the current of the laser to the determined current.

After the relationship between the output energy and the current is obtained in step 703, a current corresponding to the target output energy may be determined in the relationship, and the current of the laser may be adjusted to the determined current. After the current is adjusted, under normal conditions, the actual output energy of the laser is close to or even equal to the target output energy preset by the user, so that the requirement of the user is met.

For ease of understanding, a specific application is exemplified below. Referring to fig. 8, fig. 8 is a schematic diagram of an embodiment of the embodiment shown in fig. 7.

As shown in fig. 8, three solid curves are the relationship between the output energy E and the current I of the laser at the operating temperature of 100 ℃, 20 ℃ and-60 ℃ respectively, which are measured by the user in advance. If the target output energy of the laser preset by the user is Eo, the current of the laser can be adjusted to I when the working temperature of the laser is-60 DEG C₁(ii) a When the working temperature of the laser is 20 ℃, the current of the laser is adjusted to I₂(ii) a When the working temperature of the laser is 100 ℃, the current of the laser is adjusted to I₃Thereby enabling the output energy of the laser to be consistent at different operating temperatures.

In this embodiment, the relationship between the corresponding current and the output energy is queried according to the operating temperature of the laser, the current corresponding to the target output energy is determined according to the relationship, and the laser current is adjusted to the determined current, so that the laser can reach the target output energy desired by the user, and the output energy of the laser is kept stable.

Referring to fig. 9, fig. 9 is a schematic flowchart illustrating a current adjustment method of a laser according to another embodiment of the present invention. As shown in fig. 9, the present embodiment includes:

step 901, acquiring target output energy of a laser;

the laser may be the laser in the above embodiment, and please refer to the above embodiment for a detailed description.

The target output energy may be preset by a user, and step 901 may specifically be to read the target output energy of the locally stored laser. Of course, step 901 may specifically be receiving the target output energy of the laser sent by the user in real time.

Step 902, acquiring actual output energy of a laser;

the current adjusting device of the laser may include an energy meter disposed at an output end of the laser, and step 902 may specifically be that the energy meter measures actual output energy of the laser after the laser is turned on stably.

Step 901 does not necessarily have a chronological order with step 902.

Step 903, when the difference value between the actual output energy and the target output energy exceeds a preset threshold value, adjusting the current of the laser according to the target output energy and the actual output energy according to a preset algorithm until the difference value between the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

The preset algorithm may be various, and this embodiment is described by taking a convergence algorithm as an example, and the specific process is as follows:

if the actual output energy E is lower than the target output energy Eo, the current energy is denoted as E1, and the current I1 is denoted as a, the current is adjusted to the maximum value B, that is, the adjusted current I2 is denoted as B, and the actual output energy is denoted as E2, at which time E2 is inevitably greater than Eo, so that the current is adjusted to K is denoted as a + (B-a)/2, and the actual output energy Ek is measured.

1. Judging whether | Ek-Eo | is greater than 0.1;

(1) and if the | Ek-Eo | is less than or equal to 0.1, ending the operation.

(2) If | Ek-Eo | is >0.1

(a) If Ek is greater than Eo, K is l1+ (l2-l1)/2, and the actual output energy Ek is measured, and step 1 is executed;

(b) if Ek < Eo, I1 ═ K, E1 ═ E2, I2 ═ I1+ (l2-I1)/2, l2 is unchanged, the energy value is E2, K ═ K + (l2-l1)/2, l2 ═ K measured energy value is recorded as Ek, and the actual output energy Ek is measured, and step 1 is performed.

If the actual output energy E is higher than the target output energy Eo, the current energy is denoted as E2, and the current I2 is denoted as C, the current is adjusted to the minimum value D, that is, the adjusted current I1 is denoted as D, and the actual output energy is denoted as E1, at which time E1 is inevitably smaller than Eo, so that the current is adjusted to K ═ D + (C-D)/2, and the actual output energy Ek is measured.

2. Judging whether | Ek-Eo | is greater than 0.1;

(1) and if the | Ek-Eo | is less than or equal to 0.1, ending the operation.

(2) If | Ek-Eo | is >0.1

(a) If Ek is greater than Eo, K is l1+ (l2-l1)/2, and the actual output energy Ek is measured, and step 2 is executed;

(b) if Ek < Eo, I1 ═ K, E1 ═ E2, I2 ═ I1+ (l2-I1)/2, l2 is unchanged, the energy value is E2, K ═ K + (l2-l1)/2, l2 ═ K measured energy value is recorded as Ek, and the actual output energy Ek is measured, and step 2 is executed.

In this embodiment, the current of the laser is adjusted according to the target output energy and the actual output energy by measuring the actual output energy, so that the difference between the actual output energy and the target output energy of the laser is smaller than or equal to the preset threshold, and thus the laser can reach the target output energy desired by the user, and the output energy of the laser is kept stable.

Furthermore, after adjusting the current of the laser to the determined current in step 704 of the embodiment of fig. 7, the output energy of the laser may be expected to be at or near the target output energy under normal circumstances, but in some circumstances, the output energy of the laser may not be expected to be at or near the target output energy. Therefore, after the current of the laser is adjusted to the determined current in step 704, the actual output energy of the laser can be further obtained; and when the difference value of the actual output energy and the target output energy exceeds a preset threshold value, adjusting the current of the laser according to the actual output energy and the target output energy according to a preset algorithm until the difference value of the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

Corresponding to the embodiment shown in fig. 7, in the embodiment of the present invention, a current adjusting apparatus for a laser is also provided. Referring to fig. 10, fig. 10 is a schematic structural diagram of an embodiment of a current adjustment apparatus of a laser according to the present invention. As shown in fig. 10, the present embodiment includes:

a first obtaining module 1010, configured to obtain a target output energy of the laser;

in this embodiment, the laser may be the laser in the above embodiment, and please refer to the above embodiment for a detailed description; or various lasers known in the art.

The target output energy may be preset by a user, and the first obtaining module 1010 may include a reading unit for reading the target output energy of the locally stored laser. The first acquisition module 1010 may also include a receiving unit for receiving the target output energy of the laser transmitted by the user in real time.

A second obtaining module 1020, configured to obtain an operating temperature of the laser;

the second acquiring module 1020 may include a temperature sensor for measuring the operating temperature of the laser after the laser is stable at power-on. The second obtaining module 1020 may also include a receiving unit for receiving the preset operating temperature transmitted by the user.

The query module 1030 is used for querying the relationship between preset output energy corresponding to the working temperature and current;

after the second obtaining module 1020 obtains the operating temperature of the laser, the query module 1030 queries the relationship between the output energy and the current corresponding to the operating temperature.

The first adjusting module 1040 is configured to determine a current corresponding to the target output energy according to the relationship between the output energy and the current, and adjust the current of the laser to the determined current.

The first adjusting module 1040 may determine the current corresponding to the target output energy and perform current adjustment after the query module 1030 queries the relationship between the output energy and the current. After the current is adjusted, under normal conditions, the actual output energy of the laser is close to or even equal to the target output energy preset by the user, so that the requirement of the user is met.

In some cases, however, the output energy of the laser may not be as close or as desired to the target output energy. Therefore, preferably, the current adjustment device further includes:

the third acquisition module is used for acquiring the actual output energy of the laser after the first adjustment module adjusts the current of the laser to the determined current;

In the embodiment of the present invention, another current adjusting apparatus for a laser is provided, which corresponds to the embodiment shown in fig. 9. Referring to fig. 11, fig. 11 is a schematic structural diagram of a current adjustment apparatus of a laser according to another embodiment of the present invention. As shown in fig. 11, the present embodiment includes:

a first obtaining module 1110, configured to obtain a target output energy of the laser;

The target output energy may be preset by a user, and the first obtaining module may specifically include a reading unit, configured to read the target output energy of the laser stored locally. Of course, the first obtaining module may specifically include a receiving unit, configured to receive the target output energy of the laser sent by the user in real time.

A second obtaining module 1120, configured to obtain an actual output energy of the laser;

the second obtaining module 1120 may include an energy meter disposed at the output of the laser, and the energy meter is used for measuring the actual output energy of the laser after the laser is turned on and stabilized.

The adjusting module 1130 is configured to, when the difference between the actual output energy and the target output energy exceeds a preset threshold, adjust the current of the laser according to the target output energy and the actual output energy according to a preset algorithm until the difference between the actual output energy and the target output energy of the laser is less than or equal to the preset threshold.

The preset algorithm may be various, such as a convergence algorithm.

In an embodiment of the present invention, a laser system is also provided, corresponding to the embodiment shown in fig. 7. Referring to fig. 12, fig. 12 is a schematic structural diagram of a laser system according to an embodiment of the present invention. As shown in fig. 12, the present embodiment includes:

a laser 1210, comprising: a pump source including at least two laser bars with different dominant wavelengths, the spectrum composed of the at least two laser bars with different dominant wavelengths being continuous in a specific wavelength range at a temperature T, at least a partial range of the specific wavelength range being [ M-6, M ] nanometer or [ M-3, M < + > 3] nanometer or [ M, M < + > 6] nanometer; the working medium is used for absorbing light emitted by the pumping source and realizing photon transition, and the dominant wavelength of an absorption spectrum is M nanometers;

the laser 1210 may be the laser in the above embodiments, and the detailed description refers to the above embodiments.

A current adjusting device 1220 for obtaining a target output energy of the laser; acquiring the working temperature of the laser; inquiring the relation between preset output energy corresponding to the working temperature and current; and determining a current corresponding to the target output energy according to the relation between the output energy and the current, and adjusting the current of the laser to the determined current.

For a detailed description of the current adjustment device 1220, refer to the description of the embodiment shown in fig. 7 and 10.

In an embodiment of the present invention, another laser system is provided, corresponding to the embodiment shown in fig. 9. Referring to fig. 13, fig. 13 is a schematic structural diagram of a laser system according to another embodiment of the invention. As shown in fig. 13, the present embodiment includes:

a laser 1310, comprising: a pump source including at least two laser bars with different dominant wavelengths, the spectrum composed of the at least two laser bars with different dominant wavelengths being continuous in a specific wavelength range at a temperature T, at least a partial range of the specific wavelength range being [ M-6, M ] nanometer or [ M-3, M < + > 3] nanometer or [ M, M < + > 6] nanometer; the working medium is used for absorbing light emitted by the pumping source and realizing photon transition, and the dominant wavelength of an absorption spectrum is M nanometers;

the laser 1310 may be the laser in the above embodiment, and the detailed description is given in the above embodiment.

A current adjusting device 1320, configured to obtain a target output energy of the laser; acquiring actual output energy of the laser; and when the difference value of the actual output energy and the target output energy exceeds a preset threshold value, adjusting the current of the laser according to the target output energy and the actual output energy according to a preset algorithm until the difference value of the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

For a detailed description of the current adjustment device 1320, refer to the description of the embodiment shown in fig. 9 and 11.

Corresponding to the embodiment shown in fig. 7, in the embodiment of the present invention, a current adjusting apparatus for a laser is also provided. Referring to fig. 14, fig. 14 is a schematic structural diagram of a current adjusting apparatus of a laser according to an embodiment of the present invention. As shown in fig. 14, the current adjusting apparatus 1400 of the laser includes:

at least one processor 1410, one processor 1410 being exemplified in fig. 14; and a memory 1420 communicatively coupled to the at least one processor 1410; the memory stores a program of instructions executable by the at least one processor, and the program of instructions is executed by the at least one processor to enable the at least one processor to perform the method for adjusting the current of the laser in the embodiment of fig. 7.

The processor 1410 and the memory 1420 may be connected by a bus or other means, such as the bus connection shown in FIG. 14.

The memory 1420, which is a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the current adjustment method of the laser in the embodiment of fig. 7. The processor 1410 executes various functional applications and data processing of the current adjusting apparatus of the laser by executing nonvolatile software programs, instructions, and modules stored in the memory 1420, that is, implements the current adjusting method of the laser in the embodiment of fig. 7.

The memory 1420 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created by use of the current adjustment method of the laser in the embodiment of fig. 7, and the like. Further, memory 1420 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 1420 may include memory located remotely from the processor 1410, which may be connected to electronic devices via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

One or more modules are stored in the memory 1420 and, when executed by the one or more processors 1410, perform the current adjustment method of the laser applied to the current adjustment apparatus of the laser in the embodiment of fig. 7.

In an embodiment of the present invention, another current adjusting apparatus for a laser is provided, corresponding to the embodiment shown in fig. 9. Referring to fig. 15, fig. 15 is a schematic structural diagram of a current adjusting apparatus of a laser according to an embodiment of the present invention. As shown in fig. 15, the current adjusting apparatus 1500 of the laser includes:

at least one processor 1510, one processor 1510 being illustrated in FIG. 15; and memory 1520 communicatively connected to the at least one processor 1510; the memory stores a program of instructions executable by the at least one processor, and the program of instructions is executed by the at least one processor to enable the at least one processor to perform the method for adjusting the current of the laser in the embodiment of fig. 9.

The processor 1510 and the memory 1520 may be connected by a bus or other means, such as by a bus in FIG. 15.

The memory 1520, which is a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the current adjustment method of the laser in the embodiment of fig. 9. The processor 1510 executes various functional applications and data processing of the current adjustment apparatus of the laser, that is, implements the current adjustment method of the laser in the embodiment of fig. 9, by executing the nonvolatile software program, instructions, and modules stored in the memory 1520.

The memory 1520 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by use of the current adjustment method of the laser in the embodiment of fig. 9, and the like. Further, the memory 1520 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 1520 may include memory remotely located from the processor 1510, which may be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

One or more modules are stored in the memory 1520 and, when executed by the one or more processors 1510, perform the current adjustment method of the laser applied to the current adjustment apparatus of the laser in the embodiment of fig. 9.

Because the dominant wavelength of the absorption spectrum of the laser working medium is M nanometers, and the spectrum of the pumping source in the laser drifts along with the temperature change, the spectrum of the laser bars with different dominant wavelengths is located at M nanometers at different working temperatures, and can be effectively absorbed by the working medium. Therefore, the laser bars positioned at the current spectrum and positioned at M nanometers can be switched on at the current working temperature, and other laser bars are switched off, so that the power consumption of the laser can be reduced.

Therefore, in the embodiment of the invention, a laser control method is also provided. Referring to fig. 16, fig. 16 is a schematic flowchart illustrating a laser control method according to an embodiment of the present invention. As shown in fig. 16, the present embodiment includes:

step 1601, acquiring a working temperature of a laser;

the execution main body of the embodiment may be a laser control device, and the device may be an external independent device of the laser, or may be a module integrated inside the laser.

The working temperature of the laser mainly refers to the temperature of a heat sink of a laser bar of the laser when the laser works.

The working temperature of the laser can be acquired in real time through the temperature sensor when the laser works (at the moment, all laser bars of the laser can be in an open state, and only part of the laser bars can be in an open state).

Since the working temperature of the laser mainly depends on the working environment, current, power and other conditions of the laser, the working temperature of the laser under different conditions can be preset according to experience. Therefore, the user can send the corresponding operating temperature according to the current condition, and step 1601 specifically can also receive the preset operating temperature sent by the user by the laser control device when the laser does not start to operate yet.

Step 1602, inquiring a main wavelength corresponding to the working temperature from a preset corresponding relationship between the temperature and the main wavelength;

because the dominant wavelength of the absorption spectrum of the laser working medium is M nanometers, and the spectrum of the pumping source in the laser drifts along with the temperature change, the spectrum of the laser bars with different dominant wavelengths is located at M nanometers at different working temperatures, and can be effectively absorbed by the working medium.

For example, the pump source includes 5 laser bars with different dominant wavelengths, the 5 different dominant wavelengths are 795nm, 800 nm, 805nm, 810nm and 815nm, respectively, and their spectra are at M nm at operating temperatures [55 ℃, 70 ℃), [40 ℃, 55 ℃), [25 ℃, 40 ℃), [10 ℃, 25 ℃), [ -5 ℃, 10 ℃).

Therefore, the spectrum of the laser bar with the main wavelength at different working temperatures can be measured in advance at M nanometers, and the corresponding relation between the working temperature and the main wavelength of the laser bar is stored.

After the operating temperature is acquired in step 1601, the dominant wavelength corresponding to the operating temperature is queried from the correspondence between the temperature and the dominant wavelength. For example, the operating temperature is obtained as 50 ℃, and the corresponding dominant wavelength is found to be 800 nm.

Step 1603, controlling the laser device to query that the laser bars with the main wavelength are in an on state, and controlling all the laser bars except the main wavelength to be in an off state at least partially.

After the main wavelength corresponding to the operating temperature is queried, the laser bars of the main wavelength may be controlled to be in an on state, and simultaneously all or part of all the laser bars except the main wavelength may be controlled to be in an off state. For example, the laser bars with the main wavelength of 800 nm obtained by query are controlled to be turned on, and the laser bars with the main wavelengths of 795nm, 805nm, 810nm and 815nm are controlled to be turned off.

In this embodiment, the working temperature of the laser may be obtained continuously, and the laser bars with different main wavelengths are switched to be in the on state along with the change of the working temperature. For example, when the laser is used in a satellite carrier, the operating temperature of the laser is changed from 20 ℃ to 50 ℃ along with the change of the external environment, and then the laser bars of 810 nanometers are switched to be switched on in the laser, so that the self-adaption to the external environment is realized.

Because the spectra of the laser bars with different main wavelengths are positioned at M nanometers at different working temperatures, the spectra can be effectively absorbed by a working medium. In this embodiment, by acquiring the operating temperature and querying the corresponding main wavelength according to the operating temperature, the laser bars of the main wavelength in the laser are controlled to be opened, and the other laser bars are at least partially closed. Compared with the scheme that all laser bars in the laser are opened, the laser bar opening method can ensure that the working medium can effectively absorb light of the laser bars, and effectively reduces power consumption of the laser.

The embodiment of fig. 16 may be combined with the embodiment of fig. 7 to allow the laser to both reduce power consumption and achieve a target output energy desired by the user. Referring to fig. 17, fig. 17 is a schematic flowchart illustrating a laser control method according to another embodiment of the invention. As shown in fig. 17, the present embodiment includes:

step 1701, obtaining the working temperature of the laser;

for a detailed description, refer to step 1601.

1702, querying a main wavelength corresponding to the working temperature from a preset corresponding relationship between the temperature and the main wavelength;

for a detailed description, refer to step 1602.

Step 1703, controlling the laser bars with the main wavelength queried and obtained in the laser to be in an on state, and controlling all the laser bars except the main wavelength to be at least partially in an off state;

for a detailed description, refer to step 1603.

Step 1704, acquiring target output energy of the laser;

for a detailed description, refer to step 701.

In this embodiment, step 1704 is executed after step 1703, but it is to be understood that step 1704 may be executed before step 1701.

Step 1705, inquiring the relation between preset output energy corresponding to the working temperature and current;

for a detailed description, refer to step 703.

Step 1706, determining a current corresponding to the target output energy according to the relationship between the output energy and the current, and adjusting the current of the laser bar with the main wavelength, which is obtained by querying in the laser, to the determined current.

For a detailed description, refer to step 704.

For example, the pump source includes 5 laser bars with different dominant wavelengths, and the 5 different dominant wavelengths are 795nm, 800 nm, 805nm, 810nm, and 815nm, respectively. In step 1702, the main wavelength of 800 nm is obtained through query, in step 1703, the laser bars with the main wavelength of 800 nm are controlled to be turned on, the laser bars with the main wavelength of 795nm, 805nm, 810nm and 815nm are controlled to be turned off, and in step 1706, the current of the laser bars with the main wavelength of 800 nm is adjusted to a determined current.

In this embodiment, after the laser bar with the corresponding main wavelength is controlled to be in the on state according to the operating temperature, the corresponding preset relationship between the output energy and the current is queried according to the operating temperature, the current corresponding to the target output energy is determined according to the relationship, and the current of the laser bar with the corresponding main wavelength is adjusted to the current, so that the laser device not only saves power consumption, but also can achieve the target output energy desired by the user, and meet the requirements of the user.

Furthermore, after adjusting the current of the laser bar to the determined current in step 1706, the output energy of the laser would normally be expected to be at or near the target output energy, but in some cases the output energy of the laser may not be expected to be at or near the target output energy. Therefore, after the current of the laser bar is adjusted to the determined current in step 1706, the actual output energy of the laser can be further obtained; and when the difference value of the actual output energy and the target output energy exceeds a preset threshold value, adjusting the current of the laser according to the actual output energy and the target output energy according to a preset algorithm until the difference value of the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

The embodiment of fig. 16 may also be combined with the embodiment of fig. 9 to allow the laser to achieve a target output energy desired by the user while reducing power consumption. Referring to fig. 18, fig. 18 is a schematic flowchart illustrating a laser control method according to another embodiment of the present invention. As shown in fig. 18, the present embodiment includes:

step 1801, obtaining a working temperature of the laser;

for a detailed description, refer to step 1601.

Step 1802, inquiring a main wavelength corresponding to the working temperature from a preset corresponding relation between the temperature and the main wavelength;

for a detailed description, refer to step 1602.

Step 1803, controlling the laser bars with the main wavelength queried in the laser to be in an on state, and controlling all the laser bars except the main wavelength to be at least partially in an off state;

for a detailed description, refer to step 1603.

1804, obtaining target output energy of the laser;

for a detailed description, refer to step 901.

Step 1805, acquiring actual output energy of the laser;

for a detailed description, refer to step 902.

Step 1806, when the difference between the actual output energy and the target output energy exceeds the preset threshold, adjusting the current of the laser bar with the main wavelength, which is obtained by querying in the laser, according to the preset algorithm according to the target output energy and the actual output energy until the difference between the actual output energy and the target output energy of the laser is less than or equal to the preset threshold.

For a detailed description, refer to step 903.

For example, the pump source includes 5 laser bars with different dominant wavelengths, and the 5 different dominant wavelengths are 795nm, 800 nm, 805nm, 810nm, and 815nm, respectively. In step 1802, the main wavelength is obtained by query, the laser bars with the main wavelength of 800 nm are controlled to be turned on in step 1803, the laser bars with the main wavelength of 795nm, 805nm, 810nm and 815nm are controlled to be turned off, and in step 1806, the current of the laser bars with the main wavelength of 800 nm is adjusted according to a preset algorithm.

In this embodiment, after the laser bar with the corresponding main wavelength is controlled to be in the on state according to the operating temperature, the current of the laser bar with the corresponding main wavelength is adjusted according to a preset algorithm until the difference between the actual output energy and the target output energy of the laser is less than or equal to a preset threshold, so that the power consumption of the laser is saved, the target output energy desired by a user can be achieved, and the user's requirements are met.

In the embodiment of the invention, the invention also provides a laser control device. Referring to fig. 19, fig. 19 is a schematic structural diagram of a laser control apparatus according to an embodiment of the present invention. As shown in fig. 19, the present embodiment includes:

a first obtaining module 1910, configured to obtain an operating temperature of a laser;

for a detailed description, refer to step 1601.

The first obtaining module may specifically include a temperature sensor, and is configured to collect an operating temperature of the laser in real time.

A first query module 1920, configured to query the dominant wavelength corresponding to the operating temperature from a preset correspondence between the temperature and the dominant wavelength;

for a detailed description, refer to step 1601.

After the first obtaining module 1910 obtains the operating temperature, the first querying module queries the dominant wavelength corresponding to the operating temperature from the corresponding relationship between the temperature and the dominant wavelength.

The control module 1930 is configured to control the laser bars with the main wavelength queried in the laser to be in an on state, and all the laser bars except the main wavelength are at least partially in an off state.

For a detailed description, refer to step 1930.

After the first query module 1920 queries the main wavelength, the control module 1930 controls the laser bars of the main wavelength to be in an on state, and controls other laser bars to be completely turned off or partially turned off.

In an embodiment of the present invention, another embodiment of a laser control apparatus is provided, corresponding to the embodiment shown in fig. 17. Referring to fig. 20, fig. 20 is a schematic structural diagram of another embodiment of a laser control apparatus according to the present invention. As shown in fig. 20, the present embodiment includes:

a first obtaining module 2010, configured to obtain an operating temperature of the laser;

the first query module 2020 is configured to query the dominant wavelength corresponding to the operating temperature from a preset corresponding relationship between the temperature and the dominant wavelength;

the control module 2030 is configured to control the laser bars with the main wavelength queried and obtained in the laser to be in an on state, and all the laser bars except the main wavelength are at least partially in an off state;

a second obtaining module 2040, configured to obtain target output energy of the laser;

a second query module 2050, configured to query a relationship between preset output energy and current corresponding to the working temperature;

the first adjusting module 2060 is configured to determine a current corresponding to the target output energy according to the relationship between the output energy and the current, and adjust the current of the laser bar with the main wavelength, which is obtained by querying in the laser, to the determined current.

Preferably, this embodiment may further include: the third acquisition module is used for acquiring the actual output energy of the laser; and the second adjusting module is used for adjusting the current of the laser bara with the main wavelength inquired and obtained in the laser according to a preset algorithm according to the target output energy and the actual output energy when the difference value of the actual output energy and the target output energy exceeds a preset threshold value until the difference value of the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

In an embodiment of the present invention, another embodiment of a laser control apparatus is provided, corresponding to the embodiment shown in fig. 18. Referring to fig. 21, fig. 21 is a schematic structural diagram of another embodiment of a laser control device according to the present invention. As shown in fig. 21, the present embodiment includes:

a first obtaining module 2110 for obtaining an operating temperature of the laser;

a first query module 2120, configured to query a dominant wavelength corresponding to the operating temperature from a preset correspondence between the temperature and the dominant wavelength;

the control module 2130 is configured to control the laser bars with the main wavelength queried in the laser device to be in an on state, and all the laser bars except the main wavelength are at least partially in an off state;

a fourth obtaining module 2140 configured to obtain a target output energy of the laser;

a fifth obtaining module 2150, configured to obtain actual output energy of the laser;

the third adjusting module 2160 is configured to, when the difference between the actual output energy and the target output energy exceeds the preset threshold, adjust, according to the target output energy and the actual output energy, the current of the laser bar with the dominant wavelength queried in the laser according to a preset algorithm until the difference between the actual output energy and the target output energy of the laser is less than or equal to the preset threshold.

In an embodiment of the present invention, corresponding to the embodiment shown in fig. 16, there is also provided another laser system, including:

a laser, comprising: a pump source including at least two laser bars with different dominant wavelengths, the spectrum composed of the at least two laser bars with different dominant wavelengths being continuous in a specific wavelength range at a temperature T, at least a partial range of the specific wavelength range being [ M-6, M ] nanometer or [ M-3, M < + > 3] nanometer or [ M, M < + > 6] nanometer; the working medium is used for absorbing light emitted by the pumping source and realizing photon transition, and the dominant wavelength of an absorption spectrum is M nanometers;

the control device is used for acquiring the working temperature of the laser; inquiring the main wavelength corresponding to the working temperature from the corresponding relation between the preset temperature and the main wavelength; and controlling the laser bars with the main wavelength inquired in the laser to be in an on state, and controlling all the laser bars except the main wavelength to be at least partially in an off state.

Preferably, the control device is further configured to obtain a target output energy of the laser; inquiring the relation between preset output energy corresponding to the working temperature and current; and determining a current corresponding to the target output energy according to the relation between the output energy and the current, and adjusting the current of the laser bar with the main wavelength inquired in the laser to the determined current. Further, the control device is further configured to obtain actual output energy of the laser after adjusting the current of the laser bar with the main wavelength, which is obtained by querying in the laser, to the determined current; when the difference value between the actual output energy and the target output energy exceeds a preset threshold value, adjusting the current of the laser bar with the main wavelength inquired and obtained in the laser according to the target output energy and the actual output energy and a preset algorithm until the difference value between the actual output energy and the target output energy of the laser is smaller than or equal to the preset threshold value.

Or the control device is also used for acquiring the target output energy of the laser; acquiring actual output energy of the laser; when the difference value between the actual output energy and the target output energy exceeds a preset threshold value, adjusting the current of the laser bar with the main wavelength inquired and obtained in the laser according to the target output energy and the actual output energy and a preset algorithm until the difference value between the actual output energy and the target output energy of the laser is smaller than or equal to the preset threshold value.

Preferably, the laser bars with the same main wavelength in the laser are connected in series, so that the control device can control the currents of the laser bars with different main wavelengths respectively.

In an embodiment of the present invention, a laser control apparatus is also provided, corresponding to the embodiment shown in fig. 16. Referring to fig. 22, fig. 22 is a schematic structural diagram of a laser control apparatus according to an embodiment of the present invention. As shown in fig. 22, the laser control apparatus 2200 includes:

at least one processor 2210, one processor 2210 being illustrated in fig. 22; and a memory 2220 communicatively coupled to the at least one processor 2210; wherein the memory stores a program of instructions executable by the at least one processor to enable the at least one processor to perform the laser control method of the embodiment of fig. 16.

The processor 2210 and the memory 2220 may be connected by a bus or other means, such as by a bus in fig. 22.

The memory 2220 is a non-volatile computer-readable storage medium, and can be used for storing non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the laser control method in the embodiment of fig. 16. The processor 2210 executes various functional applications and data processing of the laser control device, i.e., implements the laser control method in the embodiment of fig. 16, by executing nonvolatile software programs, instructions, and modules stored in the memory 2220.

The memory 2220 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created by use of the laser control method in the embodiment of fig. 16, and the like. In addition, memory 2220 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 2220 may include memory located remotely from processor 2210, which may be connected to the electronic device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

One or more modules are stored in the memory 2220 and, when executed by the one or more processors 2210, perform the laser control method applied to the laser control apparatus in the embodiment of fig. 16.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above described systems, apparatuses and units may refer to the corresponding processes in the above described method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A method for adjusting a current of a laser, comprising:

acquiring target output energy of the laser;

acquiring the working temperature of the laser;

acquiring the actual output energy of the laser;

2. The current adjustment method according to claim 1, wherein the obtaining of the target output energy of the laser is specifically:

and reading the locally stored target output energy of the laser.

3. The current adjustment method according to claim 1, wherein the obtaining of the operating temperature of the laser specifically comprises:

and the temperature sensor measures the working temperature of the laser after the laser is started stably.

4. The current adjustment method according to claim 1, wherein the obtaining of the operating temperature of the laser specifically comprises:

and acquiring the preset working temperature of the laser.

5. A current regulator for a laser, comprising:

the first adjusting module is used for determining a current corresponding to the target output energy according to the relation between the output energy and the current, and adjusting the current of the laser to the determined current;

and the second adjusting module is used for adjusting the current of the laser according to the actual output energy and the target output energy according to a preset algorithm when the difference value of the actual output energy and the target output energy exceeds a preset threshold value until the difference value of the actual output energy and the target output energy of the laser is less than or equal to the preset threshold value.

6. The current regulation device of claim 5, wherein the first acquisition module comprises:

and the reading unit is used for reading the locally stored target output energy of the laser.

7. The current regulation device of claim 5, wherein the second acquisition module comprises:

and the temperature sensor is used for measuring the working temperature of the laser after the laser is stably started.

8. A current regulation device for a laser, comprising:

at least one processor; and

a memory coupled to the at least one processor; wherein,

the memory stores a program of instructions executable by the at least one processor, the program of instructions being executable by the at least one processor to cause the at least one processor to:

acquiring target output energy of the laser;

acquiring the working temperature of the laser;

acquiring the actual output energy of the laser;