CN113281908B - Multi-channel pulsed laser beam combining device and method - Google Patents

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-channel pulsed laser beam combining device and method

technical field

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

Background technique

Under the existing laser beam combining technology, the commonly used beam combining methods include wavelength beam combining, polarization beam combining and space co-channel beam combining methods, and polarization beam combining can only effectively combine two beams of light at the same time. limitations. At present, there is no effective means for combining multiple high peak power laser pulses.

Optical devices for information processing can usually only process weak optical signals. Due to the problem of high-power laser damage, it is difficult to directly perform optical information processing on high-power laser signals in space. Especially for multi-channel parallel optical signals carrying information, simple and effective parallel-to-serial conversion of time-sharing signals and addition processing of synchronous signals are urgent problems to be solved.

Contents of the invention

Aiming at the problems existing in the prior art, embodiments of the present invention provide a multi-path pulsed laser common-path beam combining device and method.

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

At least two groups of single-pole multi-throw optical switches outputting a common optical path; wherein, any set of single-pole multi-throw optical switches is composed of a switch array composed of one or more optical switches; wherein, a polarization control element and a polarization beam combining lens form a light switch;

The at least two sets of single-pole multi-throw optical path switches output by the common optical path are used to output the input N laser pulses in time-division and common optical path under the control of the logic sequence of the common path beam combining, and/or, at least two synchronous beam combining output.

Further, it also includes:

The at least two groups of single-pole multi-throw optical path switches output by the common optical path are used to work in time-sharing mode at least two groups of single-pole multi-throw optical path switches sequentially, and time-sharing switch N laser pulses to the optical path output for the first optical path output. Information processing; the first optical information processing is parallel-to-serial optical information processing.

Further, it also includes:

The at least two sets of single-pole multi-throw optical switches output by the common optical path are used to work at least two sets of single-pole multiple-throw optical switches in synchronous mode, and any laser pulse in the first set of single-pole multiple-throw optical switches is connected to the second Any laser pulses in the group of single-pole multi-throw optical switches are synchronously combined and output for second optical information processing; the second optical information processing is the optical information processing of the adder.

Further, it also includes: enabling at least two groups of single-pole multi-throw optical path switches to output a common optical path through the polarization beam combining lens.

Further, it also includes: the polarization control element adopts an electro-optic, magneto-optical or acousto-optic control medium.

Further, it also includes:

At least two sets of single-pole multi-throw optical path switches output by the common optical path are used to perform optical path switching from multiple inputs to one output by changing the λ/2 wavelength voltage of the polarization control element under the control of the common path beam combining logic sequence .

In a second aspect, an embodiment of the present invention provides a time-division and co-channel output method, including:

The time-division and co-channel output of N input laser pulses is realized by switching the optical path based on the single-pole multi-throw optical path switch.

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

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

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

Synchronous beam combining output of laser pulses is performed 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 also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the above second method when executing the program. The steps of the time-division and co-channel output method described in the aspect, and/or, when the processor executes the program, realize the steps of the synchronous beam combining output method described in the third aspect above.

In the fifth aspect, the embodiment of the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the time-sharing described in the second aspect above is realized. The steps of the method for outputting common channels, and/or, when the processor executes the program, the steps of the method for synchronous beam combining output as described in the third aspect above are realized.

It can be known from the above technical solutions that the embodiment of the present invention provides a multi-channel pulsed laser common-path beam combining device and method, the device includes: at least two sets of single-pole multi-throw optical path switches output by the common optical path; wherein, any set of single-pole The multi-throw optical path switch is composed of a switch array composed of one or more optical switches; wherein, a polarization control element and a polarization beam combining lens form an optical switch; at least two groups of single-pole multi-throw optical path switches output by the common optical path are used for Under the control of the logic timing of the common beam combination, the input N laser pulses are time-divisionally output on the common optical path, and/or at least two synchronous beam combiners are output. In the embodiment of the present invention, under the control of the logic sequence of the common beam combination, the input N laser pulses are output in a time-division common optical path, and/or, at least two synchronous beam combining outputs are output, so as to target multiple high peak power laser pulses Provides an effective means for the common path and beam combining problems.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is a schematic structural view of a multi-channel pulsed laser co-beam combining device provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of the functional principle of a multi-channel pulse laser co-beam combining device provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of optical path switching of a multi-path pulsed laser co-path combining device provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a multi-channel pulse laser co-beam combining device provided by another embodiment of the present invention;

FIG. 5 is a schematic diagram of a time-division co-channel output sequence provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a synchronous beam combining output sequence provided by an embodiment of the present invention;

FIG. 7 is a schematic flowchart of a time-division and co-channel output method provided by an embodiment of the present invention;

FIG. 8 is a schematic flowchart of a synchronous beam combining output method provided by an embodiment of the present invention;

FIG. 9 is a schematic diagram of the physical structure of an electronic device in an embodiment of the present invention.

Detailed ways

In order to make the purpose, 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 in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. The method for co-path combining multiple pulsed lasers provided by the present invention will be explained and described in detail below through specific embodiments.

Fig. 1 is a schematic structural diagram of a multi-channel pulsed laser co-beam combining device provided by an embodiment of the present invention; as shown in Fig. 1, the device includes:

At least two groups of single-pole multi-throw optical switches outputting a common optical path; wherein, any set of single-pole multi-throw optical switches is composed of a switch array composed of one or more optical switches; wherein, a polarization control element and a polarization beam combining lens form a light switch;

The at least two sets of single-pole multi-throw optical path switches output by the common optical path are used to output the input N laser pulses in time-division and common optical path under the control of the logic sequence of the common path beam combining, and/or, at least two synchronous beam combining output.

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

In this embodiment, what needs to be explained for the polarized beam combining lens is that the polarized beam combining lens can ensure high transmittance of light in one polarization direction and high reflectivity of polarized light perpendicular to it.

In order to better understand the multi-channel pulsed laser common beam combining device provided by the embodiment of the present invention, please refer to the schematic diagram of optical path switching of the multi-channel pulsed laser common beam combining device shown in Figure 3, the multi-channel pulsed laser common beam The beam combining device includes: N-2 polarization control elements SW1-SWN-2 and N-1 polarization beam-combining lenses PL1-PLN-1; wherein, N is a positive integer greater than 2.

Among them, N-2 polarization control elements SW1-SWN-2 and N-1 polarization beam combiners PL1-PLN-1 constitute two sets of single-pole multi-throw optical path switches with a common optical path output, as shown in FIG. 2 . Under the control of the logic timing of the common beam combination, the input N channels of pulsed lasers can be output in a time-division common optical channel or 2 channels of synchronous beam combination. Further, in the time-sharing mode, the multi-channel pulse laser beam combining device is an optical information processor that realizes the parallel-to-serial function; in the synchronous mode, the multi-channel pulse laser beam combining device is an additive The optical information processor of the device function.

In Fig. 2, there are 2 sets of single-pole multi-throw optical switches with a common optical output, one of which has M input channels, and the other has N-M input channels. In the time-sharing mode, 2 groups of single-pole multi-throw optical path switches work sequentially in time-sharing, and can switch the N-way input to the common optical path output in time-sharing, realizing the parallel to serial optical information processing function; in the synchronous mode, 2 groups of single-pole multi-throw The switch of the throwing optical path works at the same time, and any one of the M-channel inputs can be synchronously combined with any one of the N-M channels to output, realizing the optical information processing function of the adder.

In Fig. 3, a polarization control element and a polarization beam combining lens form an optical switch, and a switch array composed of multiple optical switches forms a two sets of single-pole multi-throw optical path switches with a common optical path output. Among them, the switch array composed of M-1 polarization control elements and M-1 polarization beam combining lenses constitutes a set of single-pole multi-throw optical path switches with M input; N-M-1 polarization control elements and N-M-1 polarization beam combining The switch array composed of lenses forms another set of N-M input single-pole multi-throw optical path switches; two sets of single-pole multi-throw optical path switches realize common optical path input through a polarization beam combining lens.

Under the control of the logic sequence of the common beam combination, the optical path switching from multiple input to one output is completed by changing the λ/2 wavelength voltage of the polarization control element, and the common output of multiple high peak power pulses is realized; in the beam combination output logic Under timing control, synchronous beam combining output of 2 inputs can be realized.

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

Polarizing beam combining lenses can ensure high transmittance of light in one polarization direction and high reflectivity of light perpendicular to it.

Correspondingly, the method of co-combining beams of N pulsed lasers is as follows: As shown in Figure 3, the polarization direction of each input laser should ensure that the 4 paths 1, M, M+1, and N are parallel to the paper and the remaining N- The 4 paths are perpendicular to the paper; before each laser pulse is input, the optical path is set up in advance by controlling the optical switch to switch the optical path, so as to realize the function of the single-pole multi-throw optical path switch. As shown in Figure 2, in the time-sharing mode, two groups of single-pole multi-throw optical switches with a common optical path output work sequentially in time-sharing, and N-channel inputs are time-divided and shared with the optical path output to realize the parallel-to-serial optical information processing function; In synchronous mode, two sets of single-pole multi-throw optical path switches with a common optical path output work at the same time, and any one of the M-channel inputs can be synchronously combined with any one of the N-M channels to output, realizing the optical information processing function of the adder.

It can be seen from the above technical solution that the embodiment of the present invention provides a multi-channel pulsed laser common-path beam combining device, which includes: at least two sets of single-pole multi-throw optical path switches output by the common optical path; wherein, any set of single-pole multi-throw The optical path switch is composed of a switch array composed of one or more optical switches; wherein, a polarization control element and a polarization beam combining lens form an optical switch; at least two groups of single-pole multi-throw optical path switches output by the common optical path are used Under the control of the logic sequence of beam combining, the input N laser pulses are output in time-division and common optical path, and/or, at least two synchronous beam combining outputs. In the embodiment of the present invention, under the control of the logic sequence of the common beam combination, the input N laser pulses are output in a time-division common optical path, and/or, at least two synchronous beam combining outputs are output, so as to target multiple high peak power laser pulses Provides an effective means for the common path and beam combining problems.

On the basis of the foregoing embodiments, in this embodiment, it also includes:

The at least two groups of single-pole multi-throw optical path switches output by the common optical path are used to work in time-sharing mode at least two groups of single-pole multi-throw optical path switches sequentially, and time-sharing switch N laser pulses to the optical path output for the first optical path output. Information processing; the first optical information processing is parallel-to-serial optical information processing.

It can be seen from the above technical solutions that the embodiment of the present invention provides a multi-channel pulse laser common beam combining device. In the time-sharing mode, the multi-channel pulse laser common beam combining device is a parallel to serial conversion function Optical Information Processor.

On the basis of the foregoing embodiments, in this embodiment, it also includes:

The at least two sets of single-pole multi-throw optical switches output by the common optical path are used to work at least two sets of single-pole multiple-throw optical switches in synchronous mode, and any laser pulse in the first set of single-pole multiple-throw optical switches is connected to the second Any laser pulses in the group of single-pole multi-throw optical switches are synchronously combined and output for second optical information processing; the second optical information processing is the optical information processing of the adder.

It can be seen from the above technical solution that the embodiment of the present invention provides a multi-channel pulsed laser common-beam combining device. In the synchronous mode, the multi-channel pulsed laser common-beam combining device is an optical information processing device that realizes the function of an adder. device.

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

On the basis of the above embodiments, in this embodiment, it is further included that: the polarization control element adopts an electro-optic, magneto-optic or acousto-optic control medium.

On the basis of the foregoing embodiments, in this embodiment, it also includes:

At least two sets of single-pole multi-throw optical path switches output by the common optical path are used to perform optical path switching from multiple inputs to one output by changing the λ/2 wavelength voltage of the polarization control element under the control of the common path beam combining logic sequence .

In order to better understand the present invention, the content of the present invention is further described below in conjunction with the examples, but the present invention is not limited to the following examples.

Referring to Fig. 4, a six-way input pulsed laser common-path beam combining device includes a first total reflection mirror HR1, a second total reflection mirror HR2, a first PL lens PL1, a second PL lens PL2, a third PL lens PL3, a first Four PL lenses PL4, the fifth PL lens PL5, the first electro-optic switch ①, the second electro-optic switch ②, the third electro-optic switch ③, the fourth electro-optic switch ④, wherein:

The optical switch is an electro-optic switch with 1/2 input light wavelength. In this embodiment, an LN crystal is selected, and a half-wave voltage is applied to the electro-optic switch, which can rotate the polarization direction of the light beam by 90°; the polarization combining lens PL lens has high transparency to horizontally polarized light , highly reflective to vertically polarized light; two full-reflective mirrors HR have high reflectivity and can realize the optical path folding of the last two beams of light. In the following, the working steps and implementation method of this embodiment will be described by constructing optical paths for 6 time-sharing pulses through 4 optical switches in the control device.

The first, third, fifth and sixth linearly polarized pulsed lasers are horizontally polarized light; the second and fourth linearly polarized pulsed lasers are vertically polarized light. If the input laser pulse polarization direction cannot be guaranteed to be 4 channels parallel to the paper surface and N-4 channels perpendicular to the paper surface in the specific use process, the input laser pulse polarization state can meet the requirements by inserting a wave plate or adding an optical switch. .

The first set of SPMT optical path switches 1 is responsible for the switching output of the first, second, and third input optical paths; the second set of SPMT optical path switches 2 is responsible for the switching output of the fourth, fifth, and sixth input optical paths.

When two sets of single-pole multi-throw optical path switches with a common optical path output switch the optical path, the working status of each optical switch is as follows:

Time-division and co-channel output working mode: refer to the timing diagram of time-division and co-channel output shown in Figure 5,

(1) The optical path switch is switched to the first input: the first input is horizontally polarized light, and there is only ① photoelectric switch on the optical path from input to output. When the first input is switched to output, ① the photoelectric switch is not powered to maintain the horizontal polarization state of the light, and the input laser is directly output through the PL1 and PL5 lenses. It can realize the common output of the first laser input.

(2) The optical path switch is switched to the second input: the second input is vertically polarized light, before the arrival of the optical pulse ① The photoelectric switch needs to be powered on, which is equivalent to a λ/2 wave plate, that is, the optical channel is built in advance for the input optical pulse . The second input light pulse is reflected by the PL2 and PL1 lenses and reaches the powered ① photoelectric switch. After rotation, it becomes horizontally polarized light and then output through PL5. According to the scheme, the common output of the second laser input can be realized.

(3) The optical path switch is switched to the third input: the third input is horizontally polarized light. Before the arrival of the optical pulse, the photoelectric switches ① and ② need to be powered up, which is equivalent to the λ/2 wave plate, that is, the input optical pulse is set up in advance light channel. The third input light pulse is reflected by the HR1 lens and transmitted by the PL2 lens to reach the ② photoelectric switch that is powered on. After rotation, it becomes vertically polarized light and then reaches the ① photoelectric switch that is powered on after being reflected by the PL1 lens. After rotation, it becomes horizontally polarized light and then Output via PL5. According to the scheme, the common output of the third laser input can be realized.

(4) The optical path switch is switched to the fourth input: the fourth input is vertically polarized light, and there are photoelectric switches ④ and ③ on the optical path from input to output. When the fourth input is switched to output, the photoelectric switches ④ and ③ are not powered to maintain the vertical polarization state of the light, and the input laser is directly reflected and output by the PL4, PL3 and PL5 mirrors. The common output of the fourth laser input can be realized.

(5) The optical path switch is switched to the fifth input: the fifth input is horizontally polarized light, before the arrival of the optical pulse ④ The photoelectric switch needs to be powered on, which is equivalent to a λ/2 wave plate, that is, the optical channel is built in advance for the input optical pulse . The light pulse input from the fifth channel is reflected by the HR2 lens and transmitted by the PL4 lens to the powered ④ photoelectric switch, rotated to become vertically polarized light, and then reflected and output by PL3 and PL5. According to the scheme, the common output of the fifth laser input can be realized.

(6) The optical path switch is switched to the sixth input: the sixth input is horizontally polarized light, and before the arrival of the optical pulse, the photoelectric switch needs to be powered on, which is equivalent to a λ/2 wave plate, that is, the optical channel is built in advance for the input optical pulse . The light pulse input from the sixth channel passes through the PL3 lens and reaches the powered ③ photoelectric switch. After rotation, it becomes vertically polarized light and then reflects and outputs through PL5. According to the scheme, the common output of the sixth laser input can be realized.

Two-way synchronous beam combining working mode: refer to the synchronous beam combining output timing diagram shown in Figure 6,

The single-pole multi-throw optical switch 1 switches to any input of the first, second and third routes; the single-pole multi-throw optical switch 2 switches to any input of the fourth, fifth and sixth routes; Before the arrival of the laser pulse, 2 sets of single-pole multi-throw optical switch pre-built the optical channel to complete the input of any one of the first, second and third channels and any of the fourth, fifth and sixth channels. The synchronous beam combining of one input realizes the function of two adders.

Taking 6 input laser pulses with a repetition frequency of 10Hz and a pulse width of 20ns as an example, the phase delay between the 6 channels is 10ms to illustrate the working mode of time-division and co-beam combining of 6 input laser pulses.

The timing diagram of the time-division and co-output of the 6 input laser pulses is shown in Figure 4. After the common beam is combined, each frame contains 6 laser pulses, the pulse encoding interval is 10 ms, the frame width is 50 ms, and the frame frequency is 10 Hz, that is, the period is 100 ms.

The steps and working process of time-sharing co-channel combining are as follows:

(1) First, switch the optical path switch to the first path, let the first pulse input in the first path pass through the output, and trigger the optical switch in the control switch array to switch the optical path with the first pulse in the passed first path To the second channel, the switching time should be completed within 10ms, that is, the optical channel should be established before the arrival of the first pulse in the second channel.

(2) When the first pulse input in the second path passes through the output, the optical switch in the control switch array is triggered by the first pulse in the passed second path to switch the optical path to the third path, and the switching time should be within To complete within 10ms means to set up the optical channel before the arrival of the first pulse in the third channel.

(3) When the first pulse input in the third, fourth, fifth and sixth channels passes through the output in turn, the third, fourth, fifth and sixth channels that pass through The first pulse input in triggers the optical switch in the control switch array to switch the optical path to the next path. The switching time must be completed within 10ms, that is, the optical channel is established before the arrival of the first pulse in the next path.

According to the above-mentioned scheme, it can be realized that the first pulse of each of the 6 inputs is time-divisionally and co-outputted as 6 pulses in one frame.

(4) Repeat steps (1) to (6) to output the 2nd, 3rd... nth pulses of each of the 6 inputs in time-division and co-channel as the second frame, third frame, ... nth frame, and each frame contains 6 pulses.

According to the above scheme, the 6-channel pulsed laser beam combining device can realize time-division and common-channel output of 6 input laser pulse sequences, and can also realize serial-to-parallel optical information processing.

Taking any one of the single-pole multi-throw optical switch 1 and any one of the single-pole multi-throw optical switch 2 to synchronously input laser pulses with a repetition frequency of 10 Hz and a pulse width of 20 ns as an example to illustrate the two-way synchronous beam combining working mode.

It is assumed that laser pulses with a repetition frequency of 10 Hz and a pulse width of 20 ns are input synchronously to the second channel in the SPMT optical switch 1 and the fifth channel in the SPMT optical switch 2 .

The timing diagram of the synchronous beam combining output of the second and fifth input lasers is shown in Figure 5. The laser pulse intensity after synchronous beam combining is the sum of the intensity of the two input pulses, that is, the light intensity is 2A.

The steps and working process of synchronous beam combining are as follows:

Switch the SPMT optical path switch 1 to the second path, and switch the SPMT optical path switch 2 to the fifth path. Let the laser pulses input in the second and fifth channels be combined and output at the polarization combining plate PL5 at the same time. According to the scheme, the synchronous combined output of the two inputs can be completed, and the optical information processing function of the adder can be realized.

It can be seen from the above technical solutions that the multi-channel pulsed laser common beam combining device provided by the present invention can output the input N pulsed lasers in a time-division common optical path or 2 synchronous beam combining outputs under the control of the logic sequence of the common beam combining . In the time-sharing mode, the multi-channel pulse laser beam combining device is an optical information processor that realizes the parallel-to-serial function; in the synchronous mode, the multi-channel pulse laser beam combining device is an adder that implements Functional optical information processor.

Fig. 7 is a schematic flow chart of a time-sharing co-channel output method provided by an embodiment of the present invention; as shown in Fig. 7, the method includes:

Step 701: Switch the optical path based on the single-pole multi-throw optical path switch to perform time-division and common-channel output of N input laser pulses.

In order to better understand the present invention, the content of the present invention is further described below in conjunction with the examples, but the present invention is not limited to the following examples.

Referring to Fig. 4, a six-way input pulsed laser common-path beam combining device includes a first total reflection mirror HR1, a second total reflection mirror HR2, a first PL lens PL1, a second PL lens PL2, a third PL lens PL3, a first Four PL lenses PL4, the fifth PL lens PL5, the first electro-optic switch ①, the second electro-optic switch ②, the third electro-optic switch ③, the fourth electro-optic switch ④, wherein:

The optical switch is an electro-optic switch with 1/2 input light wavelength. In this embodiment, an LN crystal is selected, and a half-wave voltage is applied to the electro-optic switch, which can rotate the polarization direction of the light beam by 90°; the polarization combining lens PL lens has high transparency to horizontally polarized light , highly reflective to vertically polarized light; two full-reflective mirrors HR have high reflectivity and can realize the optical path folding of the last two beams of light. In the following, the working steps and implementation method of this embodiment will be described by constructing optical paths for 6 time-sharing pulses through 4 optical switches in the control device.

The first, third, fifth and sixth linearly polarized pulsed lasers are horizontally polarized light; the second and fourth linearly polarized pulsed lasers are vertically polarized light. If the input laser pulse polarization direction cannot be guaranteed to be 4 channels parallel to the paper surface and N-4 channels perpendicular to the paper surface in the specific use process, the input laser pulse polarization state can meet the requirements by inserting a wave plate or adding an optical switch. .

The first set of SPMT optical path switches 1 is responsible for the switching output of the first, second, and third input optical paths; the second set of SPMT optical path switches 2 is responsible for the switching output of the fourth, fifth, and sixth input optical paths.

When two sets of single-pole multi-throw optical path switches with a common optical path output switch the optical path, the working status of each optical switch is as follows:

Time-division and co-channel output working mode: refer to the timing diagram of time-division and co-channel output shown in Figure 5,

(1) The optical path switch is switched to the first input: the first input is horizontally polarized light, and there is only ① photoelectric switch on the optical path from input to output. When the first input is switched to output, ① the photoelectric switch is not powered to maintain the horizontal polarization state of the light, and the input laser is directly output through the PL1 and PL5 lenses. It can realize the common output of the first laser input.

(2) The optical path switch is switched to the second input: the second input is vertically polarized light, before the arrival of the optical pulse ① The photoelectric switch needs to be powered on, which is equivalent to a λ/2 wave plate, that is, the optical channel is built in advance for the input optical pulse . The second input light pulse is reflected by the PL2 and PL1 lenses and reaches the powered ① photoelectric switch. After rotation, it becomes horizontally polarized light and then output through PL5. According to the scheme, the common output of the second laser input can be realized.

(3) The optical path switch is switched to the third input: the third input is horizontally polarized light. Before the arrival of the optical pulse, the photoelectric switches ① and ② need to be powered up, which is equivalent to the λ/2 wave plate, that is, the input optical pulse is set up in advance light channel. The third input light pulse is reflected by the HR1 lens and transmitted by the PL2 lens to reach the ② photoelectric switch that is powered on. After rotation, it becomes vertically polarized light and then reaches the ① photoelectric switch that is powered on after being reflected by the PL1 lens. After rotation, it becomes horizontally polarized light and then Output via PL5. According to the scheme, the common output of the third laser input can be realized.

(4) The optical path switch is switched to the fourth input: the fourth input is vertically polarized light, and there are photoelectric switches ④ and ③ on the optical path from input to output. When the fourth input is switched to output, the photoelectric switches ④ and ③ are not powered to maintain the vertical polarization state of the light, and the input laser is directly reflected and output by the PL4, PL3 and PL5 mirrors. The common output of the fourth laser input can be realized.

(5) The optical path switch is switched to the fifth input: the fifth input is horizontally polarized light, before the arrival of the optical pulse ④ The photoelectric switch needs to be powered on, which is equivalent to a λ/2 wave plate, that is, the optical channel is built in advance for the input optical pulse . The light pulse input from the fifth channel is reflected by the HR2 lens and transmitted by the PL4 lens to the powered ④ photoelectric switch, rotated to become vertically polarized light, and then reflected and output by PL3 and PL5. According to the scheme, the common output of the fifth laser input can be realized.

(6) The optical path switch is switched to the sixth input: the sixth input is horizontally polarized light, and before the arrival of the optical pulse, the photoelectric switch needs to be powered on, which is equivalent to a λ/2 wave plate, that is, the optical channel is built in advance for the input optical pulse . The light pulse input from the sixth channel passes through the PL3 lens and reaches the powered ③ photoelectric switch. After rotation, it becomes vertically polarized light and then reflects and outputs through PL5. According to the scheme, the common output of the sixth laser input can be realized.

According to the above-mentioned solution, it is possible to realize the time-division and common-channel output of six input laser pulses, and realize the optical signal processing function of parallel-to-serial conversion.

Fig. 8 is a schematic flowchart of a synchronous beam combining output method provided by an embodiment of the present invention; as shown in Fig. 8, the method includes:

Step 801: Switch to any input in the first switch array based on the first set of SPMT optical switches.

Step 802: Switch to any input in the second switch array based on the second set of SPMT optical switches;

Step 803: Perform synchronous beam combining output of laser pulses based on any input in the first switch array and any input in the second switch array.

In order to better understand the present invention, the content of the present invention is further described below in conjunction with the examples, but the present invention is not limited to the following examples.

Referring to Fig. 4, a six-way input pulsed laser common-path beam combining device includes a first total reflection mirror HR1, a second total reflection mirror HR2, a first PL lens PL1, a second PL lens PL2, a third PL lens PL3, a first Four PL lenses PL4, the fifth PL lens PL5, the first electro-optic switch ①, the second electro-optic switch ②, the third electro-optic switch ③, the fourth electro-optic switch ④, wherein:

The optical switch is an electro-optic switch with 1/2 input light wavelength. In this embodiment, an LN crystal is selected, and a half-wave voltage is applied to the electro-optic switch, which can rotate the polarization direction of the light beam by 90°; the polarization combining lens PL lens has high transparency to horizontally polarized light , highly reflective to vertically polarized light; two full-reflective mirrors HR have high reflectivity and can realize the optical path folding of the last two beams of light. In the following, the working steps and implementation method of this embodiment will be described by constructing optical paths for 6 time-sharing pulses through 4 optical switches in the control device.

The first, third, fifth and sixth linearly polarized pulsed lasers are horizontally polarized light; the second and fourth linearly polarized pulsed lasers are vertically polarized light. If the input laser pulse polarization direction cannot be guaranteed to be 4 channels parallel to the paper surface and N-4 channels perpendicular to the paper surface in the specific use process, the input laser pulse polarization state can meet the requirements by inserting a wave plate or adding an optical switch. .

The first set of SPMT optical path switches 1 is responsible for the switching output of the first, second, and third input optical paths; the second set of SPMT optical path switches 2 is responsible for the switching output of the fourth, fifth, and sixth input optical paths.

When two sets of single-pole multi-throw optical path switches with a common optical path output switch the optical path, the working status of each optical switch is as follows:

Two-way synchronous beam combining working mode: refer to the synchronous beam combining output timing diagram shown in Figure 6,

The single-pole multi-throw optical switch 1 switches to any input of the first, second and third routes; the single-pole multi-throw optical switch 2 switches to any input of the fourth, fifth and sixth routes; Before the arrival of the laser pulse, 2 sets of single-pole multi-throw optical switch pre-built the optical channel to complete the input of any one of the first, second and third channels and any of the fourth, fifth and sixth channels. The synchronous beam combining of one input realizes the function of two adders.

Further, on the basis of the foregoing embodiments, in this embodiment, a method for time-division co-path combining is also included.

Referring to Figure 4, an example of a six-channel input pulsed laser beam combining device is still used as an example for explanation: specifically,

Taking 6 input laser pulses with a repetition frequency of 10Hz and a pulse width of 20ns as an example, the phase delay between the 6 channels is 10ms to illustrate the working mode of time-division and co-beam combining of 6 input laser pulses.

The timing diagram of the time-division and co-output of the 6 input laser pulses is shown in Figure 4. After the common beam is combined, each frame contains 6 laser pulses, the pulse encoding interval is 10 ms, the frame width is 50 ms, and the frame frequency is 10 Hz, that is, the period is 100 ms.

The steps and working process of time-sharing co-channel combining are as follows:

(1) First, switch the optical path switch to the first path, let the first pulse input in the first path pass through the output, and trigger the optical switch in the control switch array to switch the optical path with the first pulse in the passed first path To the second channel, the switching time should be completed within 10ms, that is, the optical channel should be established before the arrival of the first pulse in the second channel.

(2) When the first pulse input in the second path passes through the output, the optical switch in the control switch array is triggered by the first pulse in the passed second path to switch the optical path to the third path, and the switching time should be within To complete within 10ms means to set up the optical channel before the arrival of the first pulse in the third channel.

(3) When the first pulse input in the third, fourth, fifth and sixth channels passes through the output in turn, the third, fourth, fifth and sixth channels that pass through The first pulse input in triggers the optical switch in the control switch array to switch the optical path to the next path. The switching time must be completed within 10ms, that is, the optical channel is established before the arrival of the first pulse in the next path.

According to the above-mentioned scheme, it can be realized that the first pulse of each of the 6 inputs is time-divisionally and co-outputted as 6 pulses in one frame.

(4) Repeat steps (1) to (6) to output the 2nd, 3rd... nth pulses of each of the 6 inputs in time-division and co-channel as the second frame, third frame, ... nth frame, and each frame contains 6 pulses.

According to the above scheme, the 6-channel pulsed laser beam combining device can realize time-division and common-channel output of 6 input laser pulse sequences, and can also realize serial-to-parallel optical information processing.

Taking any one of the single-pole multi-throw optical switch 1 and any one of the single-pole multi-throw optical switch 2 to synchronously input laser pulses with a repetition frequency of 10 Hz and a pulse width of 20 ns as an example to illustrate the two-way synchronous beam combining working mode.

It is assumed that laser pulses with a repetition frequency of 10 Hz and a pulse width of 20 ns are input synchronously to the second channel in the SPMT optical switch 1 and the fifth channel in the SPMT optical switch 2 .

The timing diagram of the synchronous beam combining output of the second and fifth input lasers is shown in Figure 5. The laser pulse intensity after synchronous beam combining is the sum of the intensity of the two input pulses, that is, the light intensity is 2A.

Referring to Figure 4, an example of a six-channel input pulsed laser beam combining device is still used as an example for explanation: specifically,

Further, on the basis of the foregoing embodiments, in this embodiment, a method for synchronous beam combining is also included.

The steps and working process of synchronous beam combining are as follows:

Switch the SPMT optical path switch 1 to the second path, and switch the SPMT optical path switch 2 to the fifth path. Let the laser pulses input in the second and fifth channels be combined and output at the polarization combining plate PL5 at the same time. According to the scheme, the synchronous combined output of the two inputs can be completed, and the optical information processing function of the adder can be realized.

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

Among them, the processor 901, the communication interface 903, and the memory 902 complete the mutual communication through the communication bus 904; the communication interface 903 is used to realize the information transmission between various modeling software and intelligent manufacturing equipment module library and other related equipment; the processor 901 It is used to call the computer program in the memory 902. When the processor executes the computer program, the methods provided in the above-mentioned method embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented: switching the optical path based on the single-pole multi-throw optical path switch to perform N The time-division and co-channel output of the input laser pulses, and/or, based on the first set of single-pole multi-throw optical switch switches to any input in the first switch array; based on the second set of single-pole multi-throw optical switch switches to the second switch Any input in the array; synchronous beam combining output of laser pulses is performed based on any input in the first switch array and any input in the second switch array.

Based on the same inventive concept, another embodiment of the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it is implemented to perform the methods provided by the above-mentioned method embodiments. The method, for example, switches the optical path based on the single-pole multi-throw optical path switch to perform time-division and common output of N input laser pulses, and/or switches to any 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 switches; performing synchronous beam combining output of laser pulses based on any input in the first switch array and any input in the second switch array.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place , or can also be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative efforts.

Through the above description of the implementations, those skilled in the art can clearly understand that each implementation can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic Discs, optical discs, etc., include several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods of 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 cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In addition, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. Any such actual relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

In addition, in the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the descriptions described in conjunction with the embodiments or examples A particular feature, structure, material, or characteristic is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (6)

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;

switching to any input in the second switch array based on the second group 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.

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