CN218448904U - Laser device - Google Patents

Abstract

The utility model discloses a laser, include: a control module; the first light source module is connected with the control module; the control module is used for controlling the first light source module to generate a first polarized light signal; the polarization beam combiner is coupled with the first light source module; the second light source module is connected with the control module; the control module is also used for controlling the second light source module to generate a second polarized light signal; the half-wave plate is arranged on one side of the second light source module and is also used for generating a third polarized light signal according to the second polarized light signal; the reflector is coupled with the half-wave plate and is also used for reflecting the third polarized light signal to the polarization beam combiner; the polarization beam combiner is further used for generating combined laser according to the first polarized optical signal and the third polarized optical signal. The utility model discloses a laser instrument can improve the average power of the laser of transmission on avoiding causing the basis of damage to the laser instrument.

Description

Laser device

Technical Field

The utility model relates to a laser generation technical field especially relates to a laser instrument.

Background

At present, laser has the characteristics of high peak power and narrow pulse width, so that the laser is widely applied to life and production.

However, when the peak power and energy of the laser reach certain thresholds, respectively, the laser will damage the laser itself. Therefore, in order to avoid such damage in the related art, the average power of the laser light emitted by the laser is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a laser instrument can be on avoiding causing the basis of damage to the laser instrument, improves the average power of the laser of laser instrument transmission.

The application provides a laser, the laser includes: a control module; the first light source module is connected with the control module; the control module is used for controlling the first light source module to generate a first polarized light signal; the polarization beam combiner is coupled with the first light source module; the second light source module is connected with the control module; the control module is further configured to control the second light source module to generate a second polarized light signal; the half-wave plate is coupled with the second light source module and used for generating a third polarized light signal according to the second polarized light signal; the reflector is coupled with the half-wave plate and used for reflecting the third polarized light signal to the polarization beam combiner; the polarization beam combiner is further configured to generate combined laser according to the first polarized optical signal and the third polarized optical signal; the polarization directions of the first polarized optical signal and the second polarized optical signal are the same, and the polarization directions of the third polarized optical signal and the first polarized optical signal are perpendicular to each other.

The laser of the embodiment generates a first polarized light signal through a first light source module, and the first polarized light signal is incident to a polarization beam combiner; and a second polarized light signal is generated through the second light source module, a third polarized light signal is generated by the half-wave plate according to the second polarized light signal, and the third polarized light signal is reflected through the reflector, so that the third polarized light signal is incident to the polarization beam combiner. The polarization directions of the first polarized optical signal and the second polarized optical signal are the same, and the polarization directions of the third polarized optical signal and the first polarized optical signal are perpendicular to each other. The laser transmits the first polarized light signal through the polarization beam combiner, and reflects the third polarized light signal, so that the first polarized light signal and the third polarized light signal are combined after passing through the polarization beam combiner, and combined laser with higher average power is generated. The laser of the embodiment improves the average power of the laser to a certain extent.

In some embodiments, the control module comprises: a control unit for generating a first switching signal or a second switching signal; the first switch unit is respectively connected with the control unit and the first light source module, the first switch unit is used for controlling the first light source module to be turned on or turned off according to the first switch signal, the second switch unit is respectively connected with the control unit and the second light source module, and the second switch unit is used for controlling the second light source module to be turned on or turned off according to the second switch signal; the control unit is further configured to perform time delay control on the first switch unit and the second switch unit, so that the polarization beam combiner generates combined laser according to the first polarized light signal and the third polarized light signal.

In some embodiments, the optical axes of the first and second polarized optical signals are parallel to each other; the centers of the half-wave plate and the reflector are both positioned on the optical axis of the second polarized light signal; the center of the polarization beam combiner is located on the optical axis of the first polarized light signal and the third polarized light signal.

In some embodiments, the mirror is disposed at a 45 ° angle to the half-wave plate.

In some embodiments, the average power of the first polarized light signal and the average power of the second polarized light signal are both 30W, and the pulse repetition frequency of the first polarized light signal and the pulse repetition frequency of the second polarized light signal are both 800KHz.

In some embodiments, the first polarized optical signal and the third polarized optical signal are both ultraviolet optical signals.

In some embodiments, the half-wave plate comprises: a half-wave plate body; the first antireflection film is arranged on one side, close to the second light source module, of the half-wave plate body and used for performing antireflection operation on the second polarized light signal; and the second antireflection film is arranged on one side of the half-wave plate body close to the reflector and is used for performing antireflection operation on the second polarized light signal.

In some embodiments, the mirror comprises: a reflector body; the high reflection film is arranged on one side, close to the half-wave plate, of the reflector body and is used for conducting reflection operation on the third polarized light signal.

In some embodiments, the laser further comprises: the temperature regulator is respectively connected with the first light source module and the second light source module and used for regulating the working temperature of the first light source module and the working temperature of the second light source module.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic structural diagram of a laser according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a frame of a control module according to an embodiment of the present invention;

fig. 3a is a timing diagram of a first switching signal according to an embodiment of the present invention;

fig. 3b is a timing diagram of a second switching signal according to an embodiment of the present invention;

fig. 3c is a schematic diagram of a repetition rate of the combined beam laser according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a half-wave plate according to an embodiment of the present invention;

FIG. 5 is a schematic view of a reflector according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a frame of a laser according to an embodiment of the present invention.

Reference numerals are as follows: the light source module comprises a laser 100, a control module 110, a first light source module 120, a second light source module 130, a polarization beam combiner 140, a half-wave plate 150, a reflector 160, a control unit 111, a first switch unit 112, a second switch unit 113, a half-wave plate body 151, a first antireflection film 152, a second antireflection film 153, a reflector body 161, a high-reflection film 162 and a temperature regulator 170.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It should be noted that, because the laser optical signal generated by the laser has the advantages of narrow pulse width, high peak power, high single pulse energy, and the like, the laser optical signal is widely applied in various fields such as scientific research, biology, medical treatment, material processing, communication, national defense, and the like. However, the extremely high peak power and single pulse energy of the laser optical signal may damage optical components in the laser, thereby affecting the service life of the laser. In order to avoid shortening the service life of the laser, the laser in the related art cannot directly generate a high-power laser light signal, i.e., the average power of the laser generated laser light signal is low. Meanwhile, due to the limitation of single pulse energy, the repetition frequency of the laser light signal generated by the laser is relatively low.

Therefore, the application provides a laser, which can improve the average power of laser emitted by the laser on the basis of avoiding damage to the laser.

Referring to fig. 1, the present application provides a laser 100, where the laser 100 includes: a control module 110; the first light source module 120, the first light source module 120 is connected with the control module 110; the control module 110 is configured to control the first light source module 120 to generate a first polarized light signal; the polarization beam combiner 140, the polarization beam combiner 140 is coupled to the first light source module 120; the second light source module 130, the second light source module 130 is connected with the control module 110; the control module 110 is further configured to control the second light source module 130 to generate a second polarized light signal; the half-wave plate 150 is coupled with the second light source module 130, and the half-wave plate 150 is configured to generate a third polarized light signal according to the second polarized light signal; the reflector 160, the reflector 160 is coupled to the half-wave plate 150, and the reflector 160 is configured to reflect the third polarized light signal to the polarization beam combiner 140; the polarization beam combiner 140 is further configured to generate a combined laser according to the first polarized optical signal and the third polarized optical signal; the polarization directions of the first polarized optical signal and the second polarized optical signal are the same, and the polarization directions of the third polarized optical signal and the first polarized optical signal are perpendicular to each other.

It is understood that, as shown in fig. 1, the laser 100 includes a control module 110, a first light source module 120, and a second light source module 130. The control module 110 is connected to the first light source module 120 and the second light source module 130, respectively. Specifically, the first light source module 120 is coupled to the polarization beam combiner 140; the second light source module 130, the half-wave plate 150 and the reflector 160 are coupled respectively, and the reflector 160 is further configured to couple with the polarization beam combiner 140.

It is understood that the control module 110 is configured to control the first light source module 120 to be turned on and off, and when the control module 110 controls the first light source module 120 to be turned on, the first light source module 120 generates a first polarized light signal; when the control module 110 controls the first light source module 120 to be turned off, the first light source module 120 stops operating. The first polarized light signal generated by the first light source module 120 is a linearly polarized laser light signal. In this embodiment, the polarization state of the first polarized light signal is a horizontal polarization state, and the first polarized light signal is emitted from the first light source module 120, then propagates along the horizontal direction and enters the polarization beam combiner 140.

It is understood that the control module 110 is configured to control the second light source module 130 to be turned on and off, and when the control module 110 controls the second light source module 130 to be turned on, the second light source module 130 generates a second polarized light signal; when the control module 110 controls the second light source module 130 to be turned off, the second light source module 130 stops working. The second polarized light signal generated by the second light source module 130 is a linearly polarized laser light signal. In this embodiment, the polarization state of the second polarized light signal is a horizontal polarization state, i.e., the polarization direction of the first polarized light signal generated by the first light source module 120 is the same as the polarization direction of the second polarized light signal generated by the second light source module 130. After exiting from the second light source module 130, the second polarized light signal propagates in the horizontal direction and is incident on the half-wave plate 150. Wherein the half-wave plate 150 is used for adjusting the polarization direction of the first polarized light signal. When the first polarized light signal in the horizontal polarization state is transmitted through the half-wave plate 150, the half-wave plate 150 adjusts the polarization state of the first polarized light signal from the horizontal polarization state to the vertical polarization state, thereby generating a third polarized light signal having a polarization state of the vertical polarization state. In this embodiment, the horizontal polarization state and the vertical polarization state are two polarization states perpendicular to each other, that is, the polarization direction of the second polarized optical signal and the polarization direction of the third polarized optical signal are perpendicular to each other.

It will be appreciated that the third polarized light signal exits half-wave plate 150, propagates in the horizontal direction and is incident on mirror 160. The mirror 160 is used for reflecting the third polarized light signal to change the propagation direction of the third polarized light signal. In the present embodiment, when the third polarized light signal is incident on the mirror 160, the mirror 160 reflects the third polarized light signal so that the third polarized light signal exits in the vertical direction. The third polarized light signal propagates in the vertical direction and is incident on the polarization beam combiner 140.

It can be understood from the above that, the first polarized light signal is incident to the polarization beam combiner 140 along the horizontal direction; the third polarized light signal is incident to the polarization beam combiner 140 along the vertical direction. The polarization beam combiner 140 is configured to combine optical signals with different polarization states. Specifically, in the present embodiment, the polarization beam combiner 140 is configured to transmit the optical signal in the horizontal polarization state, and the polarization beam combiner 140 is further configured to reflect the optical signal in the vertical polarization state. Therefore, as shown in fig. 1, the first polarized optical signal in the horizontal polarization state can be transmitted by the polarization beam combiner 140 to exit along the horizontal direction; the third polarized optical signal in the vertical polarization state can be reflected by the polarization beam combiner 140 to exit in the horizontal direction. The first polarized light signal and the third polarized light signal pass through the polarization beam combiner 140 and then exit along the same horizontal direction, that is, the first polarized light signal and the third polarized light signal are spatially overlapped, so that combined laser light (laser light signal) is generated.

It can be understood that the average power of the first optical source module 120 for generating the first polarized optical signal is assumed to be W1, and the average power of the second optical source module 130 for generating the third polarized optical signal is assumed to be W2. Since the combined laser light generated by the laser 100 of this embodiment is obtained by combining the first polarized light signal and the third polarized light signal, the average power W3 of the combined laser light is the sum of the average powers of the first polarized light signal and the third polarized light signal, i.e., W3= W1+ W2. It can be understood that the average power W3 of the laser 100 can be flexibly adjusted by adjusting the average power W1 of the first light source module 120 and the average power W2 of the second light source module 130. In addition, the transmittance of the polarization beam combiner 140 of the present embodiment for the first polarized light signal can reach 99% or more, the reflectance of the polarization beam combiner 140 for the third polarized light signal can reach 95% or more, and the polarization extinction ratio can reach 30dB or more.

The laser 100 of the present embodiment generates a first polarized light signal through the first light source module 120, and the first polarized light signal enters the polarization beam combiner 140; a second polarized light signal is also generated by the second light source module 130, and a third polarized light signal is generated by the half-wave plate 150 according to the second polarized light signal, and is further reflected by the mirror 160, so that the third polarized light signal is incident to the polarization beam combiner 140. The polarization directions of the first polarized optical signal and the second polarized optical signal are the same, and the polarization directions of the third polarized optical signal and the first polarized optical signal are perpendicular to each other. The laser 100 transmits the first polarized light signal through the polarization beam combiner 140, and reflects the third polarized light signal, so that the first polarized light signal and the third polarized light signal are combined after passing through the polarization beam combiner 140, thereby generating a combined laser with higher average power. The laser 100 of the embodiment can improve the average power of the laser light emitted by the laser 100 on the basis of avoiding damage to the laser 100.

Referring to fig. 1, 3a, 3b and 3c, in some embodiments, the control module 110 includes: a control unit 111, the control unit 111 being configured to generate the first switching signal or the second switching signal; the first switch unit 112 is connected with the control unit 111 and the first light source module 120, respectively, the first switch unit 112 is used for controlling the first light source module 120 to be turned on or turned off according to a first switch signal, the second switch unit 113 is connected with the control unit 111 and the second light source module 130, respectively, the second switch unit 113 is used for controlling the second light source module 130 to be turned on or turned off according to a second switch signal; the control unit 111 is further configured to perform time delay control on the first switch unit 112 and the second switch unit 113, so that the polarization beam combiner 140 generates combined laser according to the first polarized light signal and the third polarized light signal.

It can be understood from the above description that the control module 110 is used to control the first light source module 120 and the second light source module 130 to be turned on or off, respectively, so as to control the generation of the first polarized light signal and the second polarized light signal when the first light source module 120 and the second light source module 130 are turned on. As shown in fig. 2, the control module 110 includes a control unit 111, a first switch module, and a second switch module. The control unit 111 is configured to generate a first switching signal and a second switching signal. The first switch unit 112 controls the first light source module 120 to generate a first polarized light signal or stop working according to the first switch signal, and the second switch unit 113 controls the second light source module 130 to generate a second polarized light signal or stop working according to the second switch signal. Specifically, when the first switching signal is at a high level, the first light source module 120 generates a first polarized light signal according to the first switching signal at the high level, and when the first switching signal is at a low level, the first light source module 120 stops working according to the first switching signal at the low level. When the second switching signal is at a high level, the second light source module 130 generates a second polarized light signal according to the second switching signal at the high level, and when the second switching signal is at a low level, the second light source module 130 stops working according to the second switching signal at the low level.

It can be understood that, when the first light source module 120 and the second light source module 130 operate according to a certain time delay t1 to generate the corresponding first polarized light signal and the second polarized light signal, the repetition frequency f3 of the laser 100 generating the combined laser light is the sum of the repetition frequency f1 of the first light source module 120 generating the first polarized light signal and the repetition frequency f2 of the second light source module 130 generating the second polarized light signal, i.e. f1+ f2= f3. The repetition frequency is the number of pulses of the laser light signal generated per unit time. Therefore, the control unit 111 of this embodiment is further configured to perform time delay control on the first switching signal and the second switching signal, so that the first light source module 120 and the second light source module 130 operate according to the time delay amount t1, thereby increasing the repetition frequency f3 of the combined laser.

Specifically, the timing diagram of the first switching signal is shown in fig. 3a, and the timing diagram of the second switching signal is shown in fig. 3 b. From the above, the repetition rate of the laser 100 generating the combined laser light in one duty cycle is shown in fig. 3 c.

It can be understood that, in the laser 100 of this embodiment, the control module 110 is arranged, so that the first light source module 120 and the second light source module 130 can be turned on or off, and the control unit 111 performs time delay control on the first light source module 120 and the second light source module 130, so that the first light source module 120 and the second light source module 130 operate according to the time delay t1, thereby increasing the repetition frequency of the laser 100 for generating the combined laser.

In one particular embodiment, the control module 110 may be an acousto-optic switch control board. The acousto-optic switch control board can precisely control the working time sequence of the first light source module 120 and the second light source module 130 by generating a corresponding first switch signal and a corresponding second switch signal and performing corresponding delay processing.

Referring again to fig. 1, in some embodiments, the optical axes of the first polarized light signal and the second polarized light signal are parallel to each other; the half-wave plate 150 and the mirror 160 are both centered on the optical axis of the second polarized light signal; the center of the polarization beam combiner 140 is located on the optical axis of the first polarized optical signal and the third polarized optical signal.

It can be understood that, in order to ensure that the first polarized optical signal can be incident into the polarization beam combining mirror 140 to the maximum extent, and reduce the loss of the first polarized optical signal, the center of the polarization beam combining mirror 140 in this embodiment is located on the optical axis of the first polarized optical signal. Similarly, to reduce the loss of the second polarized light signal and the third polarized light signal, the half-wave plate 150 and the mirror 160 are both located on the optical axis of the second polarized light signal, and the optical axes of the second polarized light signal and the third polarized light signal are coincident. In addition, in order to ensure that the third polarized optical signal can be incident into the polarization beam combining mirror 140 as completely as possible, the center of the polarization beam combining mirror 140 is located on the optical axis of the third polarized optical signal in this embodiment.

Referring to fig. 1 again, in some embodiments, the disposing direction of the mirror 160 forms an angle of 45 ° with the disposing direction of the half-wave plate 150.

It will be appreciated that when the mirror 160 is disposed at a 45 ° angle to the half-wave plate 150, the third polarized light signal incident in the horizontal direction can exit in the vertical direction. In addition, when the mirror 160 is disposed at an angle of 45 ° to the half-wave plate 150, the reflection loss of the mirror 160 to the third polarized light signal can be reduced.

In some embodiments, the average power of the first polarized light signal and the average power of the second polarized light signal are both 30W, and the pulse repetition frequency of the first polarized light signal and the pulse repetition frequency of the second polarized light signal are both 800KHz.

It is understood that, in a specific embodiment, when the average power W1 of the first light source module 120 generating the first polarized light signal is 30W, and the average power W2 of the second light source module 130 generating the second polarized light signal is 30W, the average power W3 of the laser 100 generating the combined laser light is 60W. When the repetition frequency f1 of the first light source module 120 generating the first polarized light signal is 800KHz, and the repetition frequency f2 of the second light source module 130 generating the second polarized light signal is 800KHz, as can be seen from the above, the repetition frequency f3 of the laser 100 generating the combined laser beam is 1.6MHz. The first light source module 120 and the second light source module 130 may be picosecond ultraviolet laser 100 modules that combine the traveling wave amplification technology with the optical fiber seed source. It is understood that the laser 100 of the present embodiment can increase the average power and the repetition rate of the generated laser light signal to some extent.

In some embodiments, the first polarized light signal and the third polarized light signal are both ultraviolet light signals.

It is understood that the first polarized optical signal and the third polarized optical signal are both ultraviolet optical signals. In a specific embodiment, the first polarized optical signal and the second polarized optical signal have a wavelength of 355nm or 343nm, and output spot sizes of 2mm.

It can be understood that, assuming that the wavelengths of the first polarized optical signal and the second polarized optical signal are both 355nm, and the amplitudes of the first polarized optical signal and the second polarized optical signal are the same, the linear polarization ratio of the combined laser light generated by the laser 100 in the horizontal direction and the vertical direction is 1.

Referring to fig. 4, in some embodiments, a half-wave plate 150 includes: a half-wave plate body 151; the first antireflection film 152 is arranged on one side, close to the second light source module 130, of the half-wave plate body 151, and the first antireflection film 152 is used for performing antireflection operation on a second polarized light signal; and a second antireflection film 153, wherein the second antireflection film 153 is disposed on one side of the half-wave plate body 151 close to the reflector 160, and the second antireflection film 153 is used for performing antireflection operation on the second polarized light signal.

It can be understood that, in order to reduce the loss of the second polarized light signal when passing through the half-wave plate 150 for transmission, corresponding antireflection films (a first antireflection film 152 and a second antireflection film 153) are disposed on both sides of the half-wave plate body 151 in this embodiment. The half-wave plate 150 may be a multi-stage half-wave plate 150 or a vacuum zero-and-half-wave plate 150. In a specific embodiment, when the first polarized light signal and the second polarized light signal are both ultraviolet light signals, the first antireflection film 152 and the second antireflection film 153 are antireflection films for ultraviolet wavelengths.

Referring to fig. 5, in some embodiments, the reflector 160 includes: a mirror body 161; and a high reflection film 162, wherein the high reflection film 162 is disposed on one side of the reflector body 161 close to the half-wave plate 150, and the high reflection film 162 is used for performing a reflection operation on the third polarized light signal.

It is understood that, in order to reduce the reflection loss of the third polarized light signal, the mirror body 161 of the present embodiment is provided with the high reflection film 162. Specifically, the high-reflection film 162 has a reflectivity of 99% or more with respect to the third polarized light signal, has a high damage threshold, and can withstand irradiation of the high-power third polarized light signal.

Referring to fig. 6, in some embodiments, the laser 100 further includes: the temperature regulator 170 is connected to the first light source module 120 and the second light source module 130, and the temperature regulator 170 is used to regulate the operating temperature of the first light source module 120 and the second light source module 130.

It can be understood that, since the first light source module 120 and the second light source module 130 generate a large amount of heat during operation, the operation performance of the first light source module 120 and the second light source module 130 is easily reduced due to an excessively high operation temperature. For this reason, the laser 100 in this embodiment is further provided with a temperature regulator 170. The temperature regulator 170 is used to regulate the operating temperature of the first and second light source modules 120 and 130.

In one particular embodiment, the temperature regulator 170 is a hydronic device. The cooling liquid with the temperature of 22 ℃ flows in the circulating cooling device in a circulating manner, so that the working temperature of the first light source module 120 and the second light source module 130 can be effectively maintained, and the problem of overheating can be avoided.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (9)

1. A laser, characterized in that the laser comprises:

a control module;

the first light source module is connected with the control module; the control module is used for controlling the first light source module to generate a first polarized light signal;

the polarization beam combiner is coupled with the first light source module;

the second light source module is connected with the control module; the control module is further configured to control the second light source module to generate a second polarized light signal;

the half-wave plate is coupled with the second light source module and used for generating a third polarized light signal according to the second polarized light signal;

the reflecting mirror is coupled with the half-wave plate and used for reflecting the third polarized light signal to the polarization beam combiner; the polarization beam combiner is further configured to generate combined laser according to the first polarized optical signal and the third polarized optical signal;

the polarization directions of the first polarized optical signal and the second polarized optical signal are the same, and the polarization directions of the third polarized optical signal and the first polarized optical signal are perpendicular to each other.

2. The laser of claim 1, wherein the control module comprises:

a control unit for generating a first switching signal or a second switching signal;

the first switch unit is respectively connected with the control unit and the first light source module and is used for controlling the first light source module to be turned on or turned off according to the first switch signal,

the second switch unit is respectively connected with the control unit and the second light source module, and is used for controlling the second light source module to be turned on or turned off according to the second switch signal;

the control unit is further configured to perform time delay control on the first switch unit and the second switch unit, so that the polarization beam combiner generates combined laser according to the first polarized light signal and the third polarized light signal.

3. The laser of claim 1, wherein the optical axes of the first and second polarized optical signals are parallel to each other; the centers of the half-wave plate and the reflecting mirror are both positioned on the optical axis of the second polarized light signal; the center of the polarization beam combiner is located on the optical axis of the first polarized light signal and the third polarized light signal.

4. A laser as claimed in claim 3 wherein the mirrors are arranged at 45 ° to the half-wave plate.

5. The laser of claim 1, wherein the average power of the first polarized light signal and the average power of the second polarized light signal are both 30W, and wherein the pulse repetition frequency of the first polarized light signal and the pulse repetition frequency of the second polarized light signal are both 800KHz.

6. The laser of claim 5, wherein the first and third polarized light signals are ultraviolet light signals.

7. The laser of claim 6, wherein the half-wave plate comprises:

a half-wave plate body;

the first antireflection film is arranged on one side, close to the second light source module, of the half-wave plate body and is used for performing antireflection operation on the second polarized light signal;

and the second antireflection film is arranged on one side of the half-wave plate body close to the reflector and is used for performing antireflection operation on the second polarized light signal.

8. The laser of claim 7, wherein the mirror comprises:

a reflector body;

the high reflection film is arranged on one side, close to the half-wave plate, of the reflector body and is used for conducting reflection operation on the third polarized light signal.

9. The laser of any one of claims 1 to 8, further comprising:

the temperature regulator is respectively connected with the first light source module and the second light source module and used for regulating the working temperature of the first light source module and the working temperature of the second light source module.

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