CN113281908B

CN113281908B - Multi-path pulse laser common-path beam combining device and method

Info

Publication number: CN113281908B
Application number: CN202110341823.0A
Authority: CN
Inventors: 王巍; 杨森; 赵启航; 张珂
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2023-02-28
Anticipated expiration: 2041-03-30
Also published as: CN113281908A

Abstract

The embodiment of the invention provides a multi-path pulse laser common-path beam combining device and a method, wherein the device comprises the following steps: at least two groups of single-pole multi-throw optical path switches sharing optical path output; wherein, any group of single-pole multi-throw optical path switches is composed of a switch array formed by one or more photoswitches; wherein, a polarization control element and a polarization beam combining lens form an optical switch; and the at least two groups of single-pole multi-throw optical path switches for outputting the input N laser pulses in a time-sharing common optical path and/or outputting at least two paths of synchronous combined beams under the control of a common-path combined beam logic time sequence. The embodiment of the invention outputs the input N paths of laser pulses in a time-sharing common light path and/or outputs at least two paths of synchronous combined beams under the control of the common-path combined logic time sequence, thereby providing an effective means for the common-path and combined-beam problems of multiple paths of high-peak-power laser pulses.

Description

Multi-path pulse laser common-path beam combining device and method

Technical Field

The invention relates to the technical field of laser beam combination and optical information processing, in particular to a multi-channel pulse laser common-path beam combination device and method.

Background

Under the existing laser beam combination technology, the commonly adopted beam combination method comprises the beam combination modes of wavelength beam combination, polarization beam combination, space common path and the like, and the polarization beam combination has certain limitation because the polarization beam combination can only effectively combine two beams of light at the same time. Currently, there is no effective means for combining multiple high peak power laser pulses.

Information processing optics can only process weak optical signals generally, and it is difficult to directly perform optical information processing on high-power laser signals in space due to the problem of high-power laser damage. Especially for the multi-path parallel optical signals carrying information, the addition processing of simple and effective time division signal parallel-to-serial and synchronous signals is a problem to be solved urgently.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides a multi-path pulse laser common-path beam combining device and a multi-path pulse laser common-path beam combining method.

In a first aspect, an embodiment of the present invention provides a multi-channel pulse laser common-path beam combining device, including:

at least two groups of single-pole multi-throw optical path switches sharing optical path output; wherein, any group of the single-pole multi-throw optical path switches is composed of a switch array formed by one or more photoswitches; wherein, a polarization control element and a polarization beam combining lens form an optical switch;

and the at least two groups of single-pole multi-throw optical path switches for outputting the input N laser pulses in a time-sharing common optical path and/or outputting at least two paths of synchronous combined beams under the control of a common-path combined beam logic time sequence.

Further, still include:

the at least two groups of single-pole multi-throw optical path switches with the common optical path output are used for sequentially working in a time-sharing mode, and switching N laser pulses to the optical path output in a time-sharing mode to perform first optical information processing; the first optical information processing is parallel-to-serial optical information processing.

Further, still include:

the at least two groups of single-pole multi-throw optical path switches with the common optical path output are used for simultaneously working in a synchronous mode, and synchronously combining any laser pulse in the first group of single-pole multi-throw optical path switches with any laser pulse in the second group of single-pole multi-throw optical path switches to output and perform second optical information processing; the second optical information processing is optical information processing of an adder.

Further, still include: and the polarization beam combining lens enables the at least two groups of single-pole multi-throw optical path switches to carry out common optical path output.

Further, still include: the polarization control element adopts electro-optic or magneto-optic or acoustic-optic control medium.

Further, the method also comprises the following steps:

and the at least two groups of single-pole multi-throw optical path switches for common optical path output are used for switching optical paths from multi-path input to one path output by changing the lambda/2 wavelength voltage of the polarization control element under the control of a common path beam combination logic time sequence.

In a second aspect, an embodiment of the present invention provides a time-sharing common-path output method, including:

and switching the optical path based on the single-pole multi-throw optical path switch to perform time-sharing common-path output of N paths of input laser pulses.

In a third aspect, an embodiment of the present invention provides a synchronous beam combining and outputting method, including:

switching to any input in the first switch array based on the first set of single-pole-multi-throw optical path switches;

switching to any input in the second switch array based on the second group of single-pole multi-throw optical path switches;

and carrying out synchronous beam combination output of laser pulses based on any input in the first switch array and any input in the second switch array.

In a fourth aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the time-sharing common output method according to the second aspect when executing the program, and/or implements the steps of the synchronous combining output method according to the third aspect when executing the program.

In a fifth aspect, the present invention further provides a non-transitory computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements the steps of the time-sharing common-path output method according to the second aspect, and/or the processor when executing the program implements the steps of the synchronous combined-beam output method according to the third aspect.

As can be seen from the foregoing technical solutions, an embodiment of the present invention provides a multi-channel pulse laser common-path beam combining apparatus and method, where the apparatus includes: at least two groups of single-pole multi-throw optical path switches sharing optical path output; wherein, any group of single-pole multi-throw optical path switches is composed of a switch array formed by one or more photoswitches; wherein, a polarization control element and a polarization beam combining lens form an optical switch; and the at least two groups of single-pole multi-throw optical path switches for outputting the input N laser pulses in a time-sharing common optical path and/or outputting at least two paths of synchronous combined beams under the control of a common-path combined beam logic time sequence. The embodiment of the invention provides an effective means for the common-path and beam-combining problems of multi-path high-peak power laser pulses by outputting N paths of input laser pulses in a time-sharing common-path manner and/or outputting at least two paths of input laser pulses in a synchronous beam-combining manner under the control of a common-path beam-combining logic time sequence.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions in the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a multi-channel pulse laser common-path beam combining device according to an embodiment of the present invention;

fig. 2 is a functional schematic diagram of a multi-channel pulsed laser common-channel beam combining device according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating optical path switching of a multi-path pulse laser common-path beam combining device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a multi-path pulse laser common-path beam combining device according to another embodiment of the present invention;

FIG. 5 is a timing diagram of the time-sharing common-path output according to an embodiment of the present invention;

FIG. 6 is a timing diagram of a synchronous beam combining output according to an embodiment of the present invention;

fig. 7 is a schematic flowchart of a time-sharing common-path output method according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a synchronous beam combination output method according to an embodiment of the present invention;

fig. 9 is a schematic physical structure diagram of an electronic device according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. The multi-path pulsed laser co-path beam combining method provided by the present invention will be explained and illustrated in detail by specific examples.

Fig. 1 is a schematic structural diagram of a multi-channel pulse laser common-path beam combining device according to an embodiment of the present invention; as shown in fig. 1, the apparatus includes:

In the present embodiment, it should be noted that the polarization control element can adopt electro-optical, magneto-optical, acousto-optical media, and other high-speed and high-precision polarization control media.

In this embodiment, it should be noted that, for the polarization beam combining lens, the polarization beam combining lens can ensure that light in one polarization direction has high transmittance and simultaneously polarized light perpendicular to the polarization direction has high reflectance.

For better understanding of the multi-channel pulse laser common-path beam combining device provided by the embodiment of the present invention, referring to the schematic optical path switching diagram of the multi-channel pulse laser common-path beam combining device shown in fig. 3, the multi-channel pulse laser common-path beam combining device includes: n-2 polarization control elements SW 1-SWN-2 and N-1 polarization beam combining lenses PL 1-PLN-1; wherein N is a positive integer greater than 2.

Wherein, N-2 polarization control elements SW 1-SWN-2 and N-1 polarization beam combining pieces PL 1-PLN-1 form a 2-group single-pole multi-throw optical path switch with a common optical path output, as shown in FIG. 2. Under the control of the common-path beam combination logic sequence, the input N paths of pulse lasers can be output in a time-sharing common-path mode or 2 paths of synchronous beam combination. Furthermore, in a time-sharing mode, the multi-channel pulse laser common-path beam combining device is an optical information processor for realizing the function of converting parallel into serial; in the synchronous mode, the multi-channel pulse laser common-path beam combining device is an optical information processor for realizing the function of an adder.

In fig. 2, there are 2 groups of single-pole multi-throw optical switches sharing an optical path output, one group has M inputs, and the other group has N-M inputs. In a time-sharing mode, 2 groups of single-pole multi-throw optical path switches work in a time-sharing mode in sequence, and N paths of input can be switched to a common optical path for output in a time-sharing mode, so that the function of converting parallel to serial optical information processing is realized; in a synchronous mode, the 2 groups of single-pole multi-throw optical path switches work simultaneously, any one of M paths of input and any one of N-M paths of input can be synchronously combined and output, and the optical information processing function of the adder is realized.

In fig. 3, a polarization control element and a polarization beam combining lens form an optical switch, and a switch array formed by a plurality of optical switches forms a 2-group single-pole multi-throw optical path switch with a common optical path output. Wherein, a switch array formed by M-1 polarization control elements and M-1 polarization beam combining lenses forms a group of M-path input single-pole multi-throw optical path switches; the switch array formed by the N-M-1 polarization control elements and the N-M-1 polarization beam combining lens forms another group of single-pole multi-throw optical path switch with N-M input; the two groups of single-pole multi-throw optical path switches realize common optical path input through 1 polarization beam combining lens.

Under the control of a common-path beam combination logic time sequence, the switching of light paths from multi-path input to one-path output is completed by changing the lambda/2 wavelength voltage of a polarization control element, and the common-path output of multi-path high-peak power pulses is realized; under the control of the logic sequence of the beam combination output, the synchronous beam combination output of 2-path input can be realized.

The polarization control element can adopt electro-optic, magneto-optic, acousto-optic medium and other high-speed high-precision polarization control medium.

The polarization beam combining lens can ensure that light in one polarization direction has high transmittance and simultaneously has high reflectivity for polarized light perpendicular to the light.

Correspondingly, the method for combining the N paths of pulse lasers in a common path is as follows: as shown in fig. 3, the polarization direction of each path of input laser light is to ensure that 4 paths of 1, M +1, N are parallel to the paper surface and the other N-4 paths are perpendicular to the paper surface; before each path of laser pulse is input, an optical path is built in advance by controlling an optical switch to switch an optical path, so that the function of a single-pole multi-throw optical path switch is realized. As shown in fig. 2, in the time-sharing mode, 2 groups of single-pole multi-throw optical switches that share the optical path output work in time-sharing order, and input N paths into the time-sharing and common-optical path output, so as to realize the function of converting parallel to serial optical information processing; in a synchronous mode, 2 groups of single-pole multi-throw optical path switches with common optical path output work simultaneously, any one path of M paths of input and any one path of N-M paths of input can be synchronously combined and output, and the optical information processing function of the adder is realized.

As can be seen from the foregoing technical solutions, the multi-path pulse laser common-path beam combining device provided in the embodiments of the present invention includes: at least two groups of single-pole multi-throw optical path switches sharing optical path output; wherein, any group of single-pole multi-throw optical path switches is composed of a switch array formed by one or more photoswitches; wherein, a polarization control element and a polarization beam combining lens form an optical switch; and the at least two groups of single-pole multi-throw optical path switches for outputting the input N laser pulses in a time-sharing common optical path and/or outputting at least two paths of synchronous combined beams under the control of a common-path combined beam logic time sequence. The embodiment of the invention provides an effective means for the common-path and beam-combining problems of multi-path high-peak power laser pulses by outputting N paths of input laser pulses in a time-sharing common-path manner and/or outputting at least two paths of input laser pulses in a synchronous beam-combining manner under the control of a common-path beam-combining logic time sequence.

On the basis of the above embodiment, in this embodiment, the method further includes:

According to the above technical solution, in the multi-channel pulse laser common-path beam combining device provided in the embodiments of the present invention, in the time-sharing mode, the multi-channel pulse laser common-path beam combining device is an optical information processor that realizes a parallel-to-serial function.

It can be known from the foregoing technical solutions that, in the multi-channel pulse laser common-path beam combining device provided in the embodiments of the present invention, in the synchronous mode, the multi-channel pulse laser common-path beam combining device is an optical information processor that implements an adder function.

On the basis of the above embodiment, in this embodiment, the method further includes: and enabling at least two groups of single-pole multi-throw optical path switches to carry out common-path output through the polarization beam combining lens.

On the basis of the above embodiment, in this embodiment, the method further includes: the polarization control element adopts electro-optic or magneto-optic or acoustic-optic control medium.

In order to better understand the present invention, the following examples are further provided to illustrate the content of the present invention, but the present invention is not limited to the following examples.

Referring to fig. 4, a six-input pulse laser common-path beam combining device includes a first total reflection mirror HR1, a second total reflection mirror HR2, a first PL mirror PL1, a second PL mirror PL2, a third PL mirror PL3, a fourth PL mirror PL4, a fifth PL mirror PL5, a first electro-optical switch (1), a second electro-optical switch (2), a third electro-optical switch (3), and a fourth electro-optical switch (4), wherein:

the optical switch is an electro-optical switch with 1/2 input optical wavelength, in the embodiment, an LN crystal is selected, half-wave voltage is applied to the electro-optical switch, and the polarization direction of light beams can be rotated by 90 degrees; the polarization beam combining lens PL lens is high in transmission to horizontal polarized light and high in reflection to vertical polarized light; the two total reflection mirrors HR have high reflectivity, so that the light path folding of the last two beams of light can be realized. The working procedure and implementation method of this embodiment will be described below by setting up optical paths for 6 time-division pulses by 4 optical switches in the control device.

The first, third, fifth and sixth beams of polarized pulse laser are horizontal polarized light; the second and the fourth bunch of polarized pulse laser is vertical polarized light. If the polarization direction of the input laser pulse can not meet the requirement of ensuring that 4 paths are parallel to the paper surface and N-4 paths are perpendicular to the paper surface in the specific using process, the polarization state of the input laser pulse can meet the requirement by utilizing a method of inserting a wave plate or adding an optical switch.

The first group of single-pole multi-throw optical path switches 1 are responsible for switching output of the first, second and third input optical paths; the second group of single-pole multi-throw optical path switch 2 is responsible for switching output of the fourth, fifth and sixth input optical paths.

When 2 groups of single-pole multi-throw optical path switches with one common optical path output switch the optical path, the working state of each optical switch is as follows:

the time-sharing common-path output working mode is as follows: referring to the timing diagram of the time-sharing common-path output shown in figure 5,

(1) The optical path switch is switched to a first path of input: the first path of input is horizontal polarized light, and only (1) the photoelectric switch is arranged on an input-output light path. When the first path of input is switched to output, (1) the photoelectric switch is not powered to keep the horizontal polarization state of light, and input laser is directly output through the PL1 and PL5 lenses. The common output of the first path of laser input can be realized.

(2) The light path switch is switched to a second path of input: the second path of input is vertical polarized light, before the light pulse arrives, the photoelectric switch (1) needs to be electrified to be equivalent to a lambda/2 wave plate, and a light channel is built in advance for the input light pulse. The second path of input light pulse reaches the powered (1) photoelectric switch through the reflection of the PL2 and PL1 lenses, becomes horizontal polarized light after being rotated, and is output through PL 5. The common output of the second path of laser input can be realized according to the scheme.

(3) The light path switch is switched to a third path of input: the third path of input is horizontal polarized light, and before the light pulse arrives, (1) and (2) photoelectric switches need to be electrified to be equivalent to a lambda/2 wave plate, namely, an optical channel is built in advance for the input light pulse. And the third path of input light pulse is reflected by an HR1 lens and transmitted by a PL2 lens to reach the powered (2) photoelectric switch, becomes vertical polarized light after being rotated, reaches the powered (1) photoelectric switch after being reflected by the PL1 lens, becomes horizontal polarized light after being rotated, and is output through PL 5. According to the scheme, the common-path output of the third path of laser input can be realized.

(4) The light path switch is switched to a fourth input: the fourth path of input is vertical polarized light, and the optical path from input to output is provided with (4) and (3) photoelectric switches. When the fourth input is switched to the output, (4) and (3) the photoelectric switch is not electrified to keep the vertical polarization state of light, and the input laser is directly reflected and output through the PL4, PL3 and PL5 lenses. And the common output of the fourth laser input can be realized.

(5) The optical path switch is switched to a fifth path of input: the fifth path of input is horizontal polarized light, and before the optical pulse arrives, the photoelectric switch (4) needs to be electrified to be equivalent to a lambda/2 wave plate, namely, an optical channel is built in advance for the input optical pulse. The fifth path of input light pulse reaches the electrified (4) photoelectric switch through the reflection of the HR2 lens and the transmission of the PL4 lens, becomes vertical polarized light after rotation, and is reflected and output through PL3 and PL 5. According to the scheme, the common output of the fifth path of laser input can be realized.

(6) The light path switch is switched to a sixth input: the sixth path of input is horizontal polarized light, before the optical pulse arrives, the photoelectric switch (3) needs to be electrified to be equivalent to a lambda/2 wave plate, and an optical channel is built for the input optical pulse in advance. And the sixth path of input light pulse reaches the powered (3) photoelectric switch through the transmission of the PL3 lens, becomes vertical polarized light after rotation, and is reflected and output through PL 5. According to the scheme, the common output of the sixth path of laser input can be realized.

Two-way synchronous beam combination working mode: referring to the synchronous beam combining output timing diagram of figure 6,

the single-pole multi-throw optical path switch 1 is switched to any one of the first path, the second path and the third path for input; the single-pole multi-throw optical path switch 2 is switched to any one of the fourth path, the fifth path and the sixth path for input; before the input laser pulse arrives, 2 groups of single-pole multi-throw optical path switches build optical channels in advance, so that synchronous beam combination of any input of a first path, a second path and a third path and any input of a fourth path, a fifth path and a sixth path can be completed, and the functions of two paths of adders are realized.

The working mode of time-sharing common-path beam combination of 6 paths of input laser pulses is explained by taking the examples that 6 paths of input laser pulses are repetition frequencies of 10Hz and pulse widths of 20ns, and the phase delays among the 6 paths of input laser pulses are 10 ms.

Fig. 4 shows a timing diagram of the time-sharing common-path output of 6 paths of input laser pulses, each frame contains 6 laser pulses after the common path is closed, the pulse coding interval is 10ms, the frame width is 50ms, and the frame frequency is 10Hz, i.e., the period is 100ms.

The steps and the working process of the time-sharing common-path beam combination are as follows:

(1) Firstly, the optical path switch is switched to a first path, the 1 st pulse input in the first path is output, the optical switch in the switch array is triggered and controlled by the 1 st pulse in the first path to switch the optical path to a second path, and the switching time is completed within 10ms, namely, an optical channel is built before the 1 st pulse in the second path arrives.

(2) When the 1 st pulse input in the second path is output, the 1 st pulse in the second path is used for triggering and controlling the optical switch in the switch array to switch the optical path to the third path, and the switching time is completed within 10ms, namely, an optical channel is built before the 1 st pulse in the third path arrives.

(3) When the 1 st pulse input in the third path, the fourth path, the fifth path and the sixth path is output in sequence, the 1 st pulse input in the third path, the fourth path, the fifth path and the sixth path is used for triggering the optical switch in the control switch array to switch the optical path to the next path, and the switching time is within 10ms, namely the optical channel is built before the 1 st pulse in the next path arrives.

According to the scheme, the 1 st pulse in each of the 6 input paths can be output into 6 pulses in a frame in a time-sharing and common way.

(4) And (4) repeating the steps (1) to (6), and outputting 2 nd pulse and 3 rd pulse (823030303030303030303030303030303030303030303030303030303030in a time-sharing common way in each path of 6 paths of input pulses.

The 6-path pulse laser common-path beam combining device can realize the time-sharing common-path output of 6-path input laser pulse sequences according to the scheme, and can also realize the optical information processing from serial to parallel.

The two-path synchronous beam combination working mode is illustrated by taking an example that any path in the single-pole multi-throw optical path switch 1 and any path in the single-pole multi-throw optical path switch 2 synchronously input laser pulses with repetition frequency of 10Hz and pulse width of 20 ns.

It is assumed that the second path in the single-pole multi-throw optical path switch 1 and the fifth path in the single-pole multi-throw optical path switch 2 are synchronously input with laser pulses with repetition frequency of 10Hz and pulse width of 20 ns.

Fig. 5 shows a timing diagram of the synchronized beam combination output of the second and fifth input lasers, where the laser pulse intensity after the synchronized beam combination is the sum of the intensities of the two input pulses, i.e., the light intensity 2A.

The synchronous beam combination steps and working processes are as follows:

the single-pole multi-throw optical path switch 1 is switched to the second path, and the single-pole multi-throw optical path switch 2 is switched to the fifth path. The laser pulses input in the second path and the fifth path are simultaneously combined and output at the polarization beam combining sheet PL5, and the synchronous beam combining output of the two paths of input can be completed according to the scheme, so that the optical information processing function of the adder is realized.

According to the technical scheme, the multi-channel pulse laser common-path beam combining device provided by the invention can output N input pulse lasers in a time-sharing common-optical path or 2 input pulse lasers in a synchronous beam combining manner under the control of the common-path beam combining logic time sequence. Under the time-sharing mode, the multi-channel pulse laser common-path beam combining device is an optical information processor for realizing the function of converting parallel into serial; in the synchronous mode, the multi-path pulse laser common-path beam combining device is an optical information processor for realizing the function of an adder.

Fig. 7 is a schematic flowchart of a time-sharing common-path output method according to an embodiment of the present invention; as shown in fig. 7, the method includes:

step 701: and switching the optical path based on the single-pole multi-throw optical path switch to perform time-sharing common-path output of N paths of input laser pulses.

the optical switch is an electro-optical switch with 1/2 input optical wavelength, in the embodiment, an LN crystal is selected, half-wave voltage is applied to the electro-optical switch, and the polarization direction of light beams can be rotated by 90 degrees; the polarization beam combining lens PL lens is high in transmission to horizontal polarized light and high in reflection to vertical polarized light; the two total reflection mirrors HR have high reflectivity, so that the light path folding of the last two beams of light can be realized. The following describes the operation steps and implementation method of this embodiment by controlling 4 optical switches in the device to set up optical paths for 6 time-division pulses.

The first group of single-pole multi-throw optical path switches 1 are responsible for switching output of the first, second and third input optical paths; the second group of single-pole multi-throw optical path switches 2 are responsible for switching output of the fourth, fifth and sixth input optical paths.

When 2 groups of single-pole multi-throw optical path switches with one common optical path output switch optical paths, the working states of the optical switches are as follows:

time-sharing common-path output working mode: referring to the timing diagram of the time-sharing common-path output shown in figure 5,

(1) The optical path switch is switched to a first path of input: the first path of input is horizontal polarized light, and only (1) the photoelectric switch is arranged on an input-output light path. When the first path of input is switched to output, (1) the photoelectric switch is not powered to keep the horizontal polarization state of light, and input laser is directly output through the PL1 and PL5 lenses. The common-path output of the first path of laser input can be realized.

(2) The light path switch is switched to a second path of input: the second path of input is vertical polarized light, before the light pulse arrives, the photoelectric switch (1) needs to be electrified to be equivalent to a lambda/2 wave plate, and a light channel is built in advance for the input light pulse. The second path of input light pulse reaches the powered (1) photoelectric switch through the reflection of PL2 and PL1 lenses, becomes horizontal polarized light after rotation, and is output through PL 5. The common output of the second path of laser input can be realized according to the scheme.

(3) The light path switch is switched to a third path of input: the third path of input is horizontal polarized light, and before the light pulse arrives, (1) and (2) photoelectric switches need to be electrified to be equivalent to a lambda/2 wave plate, namely, an optical channel is built in advance for the input light pulse. The third path of input light pulse is reflected by the HR1 lens and transmitted by the PL2 lens to reach the powered (2) photoelectric switch, is rotated to be vertical polarized light, is reflected by the PL1 lens to reach the powered (1) photoelectric switch, is rotated to be horizontal polarized light and is output through the PL 5. According to the scheme, the common-path output of the third path of laser input can be realized.

(4) The light path switch is switched to a fourth input: the fourth path of input is vertical polarized light, and the optical path from input to output is provided with (4) and (3) photoelectric switches. When the fourth input is switched to the output, (4) and (3) the photoelectric switch is not electrified to keep the vertical polarization state of light, and the input laser is directly reflected and output through the PL4, PL3 and PL5 lenses. The common output of the fourth laser input can be realized.

(5) The optical path switch is switched to a fifth path of input: the fifth path of input is horizontal polarized light, and before the light pulse arrives, the photoelectric switch (4) needs to be electrified to be equivalent to a lambda/2 wave plate, namely, an optical channel is built in advance for the input light pulse. The fifth path of input light pulse reaches the electrified (4) photoelectric switch through the reflection of the HR2 lens and the transmission of the PL4 lens, becomes vertical polarized light after rotation, and is reflected and output through PL3 and PL 5. According to the scheme, the common output of the fifth path of laser input can be realized.

(6) The light path switch is switched to a sixth input: the sixth path of input is horizontal polarized light, before the light pulse arrives, the photoelectric switch (3) needs to be electrified to be equivalent to a lambda/2 wave plate, and an optical channel is built in advance for the input light pulse. And the sixth path of input light pulse reaches the powered (3) photoelectric switch through the transmission of the PL3 lens, becomes vertical polarized light after being rotated, and is reflected and output through PL 5. According to the scheme, the common output of the sixth path of laser input can be realized.

According to the scheme, the time-sharing common-path output of 6 paths of input laser pulses can be realized, and the function of converting parallel to serial optical signal processing is realized.

Fig. 8 is a flowchart illustrating a synchronous beam combination output method according to an embodiment of the present invention; as shown in fig. 8, the method includes:

step 801: and switching to any input in the first switch array based on the first group of single-pole multi-throw optical path switches.

Step 802: switching to any input in the second switch array based on the second group of single-pole multi-throw optical path switches;

step 803: and carrying out synchronous beam combination output of laser pulses based on any input in the first switch array and any input in the second switch array.

For better understanding of the present invention, the following examples are provided to further illustrate the present invention, but the present invention is not limited to the following examples.

the optical switch is an electro-optical switch with 1/2 input optical wavelength, in the embodiment, an LN crystal is selected, half-wave voltage is applied to the electro-optical switch, and the polarization direction of a light beam can be rotated by 90 degrees; the polarization beam combining lens PL lens is high in transmission to horizontal polarized light and high in reflection to vertical polarized light; the two fully-reflecting mirrors HR have high reflectivity, so that the light paths of the last two beams of light can be folded. The following describes the operation steps and implementation method of this embodiment by controlling 4 optical switches in the device to set up optical paths for 6 time-division pulses.

The first, third, fifth and sixth beams of polarized pulse laser are horizontal polarized light; the second and the fourth bunch of polarized pulse laser is vertical polarized light. If the polarization direction of the input laser pulse can not meet the requirement of ensuring that 4 paths are parallel to the paper surface and N-4 paths are perpendicular to the paper surface in the specific use process, the polarization state of the input laser pulse can meet the requirement by using a method of inserting a wave plate or adding an optical switch.

Further, on the basis of the above embodiment, in this embodiment, the method further includes: a method of time sharing common path beam combination.

Referring to fig. 4, a six-input pulse laser common-path beam combining apparatus is still taken as an example for explanation: in particular, the method comprises the following steps of,

the working mode of time-sharing common-path beam combination of 6 paths of input laser pulses is explained by taking the example that 6 paths of input laser pulses are all laser pulses with repetition frequency of 10Hz and pulse width of 20ns, and the phase delay among the 6 paths of input laser pulses is all 10 ms.

Fig. 4 shows a timing diagram of time-sharing common-path output of 6 input laser pulses, each frame contains 6 laser pulses after common-path combination, the pulse coding interval is 10ms, the frame width is 50ms, and the frame frequency is 10Hz, that is, the period is 100ms.

(4) Repeating the steps (1) - (6) to output the 2 nd pulse, the 3 rd pulse, the 8230, the n pulse in each of the 6 input channels into a second frame, a third frame, \8230, and an n frame in a time-sharing common channel manner, wherein each frame comprises 6 pulses.

further, on the basis of the above embodiment, in this embodiment, the method further includes: a method of simultaneous beam combining.

The synchronous beam combination steps and working processes are as follows:

Based on the same inventive concept, an embodiment of the present invention provides an electronic device, which specifically includes the following components, with reference to fig. 9: a processor 901, a communication interface 903, a memory 902, and a communication bus 904;

the processor 901, the communication interface 903 and the memory 902 complete mutual communication through a communication bus 904; the communication interface 903 is used for realizing information transmission between related equipment such as modeling software, an intelligent manufacturing equipment module library and the like; the processor 901 is configured to invoke the computer program in the memory 902, and when the processor executes the computer program, the method provided by the foregoing method embodiments is implemented, for example, when the processor executes the computer program, the following steps are implemented: the optical path is switched based on the single-pole multi-throw optical path switch to perform time-sharing common-path output of N paths of input laser pulses, and/or the optical path is switched to any path of input in the first switch array based on the first group of single-pole multi-throw optical path switches; switching to any input in the second switch array based on the second group of single-pole multi-throw optical path switches; and carrying out synchronous beam combination output of laser pulses based on any input in the first switch array and any input in the second switch array.

Based on the same inventive concept, a non-transitory computer-readable storage medium is further provided, on which a computer program is stored, which when executed by a processor is implemented to perform the methods provided by the above method embodiments, for example, performing time-sharing common-path output of N input laser pulses based on a single-pole multi-throw optical path switch to switch an optical path, and/or switching to any input in a first switch array based on a first set of single-pole multi-throw optical path switches; switching to any input in the second switch array based on the second group of single-pole multi-throw optical path switches; and carrying out synchronous beam combination output of laser pulses based on any input in the first switch array and any input in the second switch array.

The above-described embodiments of the apparatus are merely illustrative, and 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 position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.

In addition, in the present invention, terms such as "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

Moreover, in the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Furthermore, in the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A multi-channel pulse laser common-channel beam combining device is characterized by comprising:

two groups of single-pole multi-throw optical path switches sharing optical path output; wherein, any group of single-pole multi-throw optical path switches is composed of a switch array formed by one or more photoswitches; wherein, a polarization control element and a polarization beam combining lens form an optical switch;

the two groups of single-pole multi-throw optical path switches output by the common optical path are used for carrying out optical information processing of logical relation and/or on the input N paths of laser pulses under the control of the common path beam combination logical time sequence;

the two groups of single-pole multi-throw optical path switches can simultaneously switch any input path in the first group of optical paths and any input path in the second group of optical paths to a common-path beam combining output end to complete optical information processing of any two laser pulses in the input N laser pulses;

the two groups of single-pole multi-throw optical path switches sequentially and respectively switch each path input in the two groups of single-pole multi-throw optical path switches to a common-path beam-combining output end simultaneously under the control of a common-path beam-combining logic time sequence until the input N-path laser pulses are divided into two paths of laser pulses and sequentially switched to the common-path beam-combining output end, and optical information processing of the input N-path laser pulses is completed;

when the input N laser pulses are asynchronous pulse signals, two groups of single-pole multi-throw optical path switches output by the common optical path work in an OR logic relationship, and the two groups of single-pole multi-throw optical path switches can simultaneously switch any input of a first group of optical paths and any input of a second group of optical paths to a common-path beam combining output end to complete first optical information processing of any two paths of the input N laser pulses; the first optical information processing is parallel-to-serial optical information processing;

the two groups of single-pole multi-throw optical path switches sequentially and respectively switch each path of input of the two groups of single-pole multi-throw optical path switches to a common-path beam-combining output end simultaneously under the control of a common-path beam-combining logic time sequence until the input N paths of laser pulses are divided into two paths of laser pulses and sequentially switched to the common-path beam-combining output end, and the optical information processing of converting the input N paths of laser pulses into serial in parallel is completed;

when the input N laser pulses are synchronous pulse signals, the two groups of single-pole multi-throw optical path switches output by the common optical path work under the logical relation of 'AND', and the two groups of single-pole multi-throw optical path switches can simultaneously switch any one input of the first group of optical paths and any one input of the second group of optical paths to the common-path beam combining output end to complete second optical information processing of any two laser pulses in the input N laser pulses; the second optical information processing is optical information processing of an adder;

and the two groups of single-pole multi-throw optical path switches sequentially and respectively switch each path of input in the two groups of single-pole multi-throw optical path switches to a common-path beam-combining output end simultaneously under the control of a common-path beam-combining logic time sequence until the input N paths of laser pulses are divided into two paths of laser pulses and sequentially switched to the common-path beam-combining output end, and the optical information processing of the input N paths of laser pulse summators is completed.

2. The multi-channel pulse laser common-path beam combining device according to claim 1, further comprising:

the two groups of single-pole multi-throw optical path switches of the common optical path output are used for switching optical paths from multi-path input to one path output by changing lambda/2 wavelength voltage of the polarization control element under the control of a common path beam combination logic time sequence.

3. A common-path beam combining output method of the multi-path pulse laser common-path beam combining device according to claim 1, comprising:

any two laser pulse synchronous common-path beam combining output of N paths of input laser pulses is carried out based on two groups of single-pole multi-throw light path switches for switching light paths.

4. An optical information processing method of the multi-channel pulsed laser common-path beam combining device according to claim 1, comprising:

switching to any input in the first switch array based on the first set of single-pole multi-throw optical path switches;

performing synchronous beam combination output of laser pulses based on any one path of input in the first switch array and any one path of input in the second switch array to complete optical information processing of any two paths of laser pulses in the input N paths of laser pulses;

under the control of a common-path beam combination logic time sequence, sequentially and respectively switching any path of input in the first switch array and any path of input in the second switch array to a common-path beam combination output end at the same time until the input N paths of laser pulses are divided into two paths of laser pulses and sequentially switched to the common-path beam combination output end, and finishing the optical information processing of the input N paths of laser pulses.

5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the common-path combining output method according to claim 3 when executing the program and/or the processor implements the optical information processing method according to claim 4 when executing the program.

6. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the common-path-combining-beam output method according to claim 3, and/or wherein the processor, when executing the program, implements the optical information processing method according to claim 4.