CN117631629B - Laser control system based on simulation processing - Google Patents
Laser control system based on simulation processing Download PDFInfo
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- CN117631629B CN117631629B CN202311639590.8A CN202311639590A CN117631629B CN 117631629 B CN117631629 B CN 117631629B CN 202311639590 A CN202311639590 A CN 202311639590A CN 117631629 B CN117631629 B CN 117631629B
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- 238000004088 simulation Methods 0.000 title claims abstract description 29
- 238000012545 processing Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000004590 computer program Methods 0.000 claims abstract description 10
- 239000013643 reference control Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 31
- 239000000835 fiber Substances 0.000 claims description 21
- 238000013507 mapping Methods 0.000 claims description 7
- 238000011478 gradient descent method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract description 3
- 238000012549 training Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The application relates to the technical field of optics, in particular to a laser control system based on simulation processing, which comprises the following steps when a computer program in the system is executed by a processor: according to the pumping light intensity information and the target current of each branch, predicting to obtain a reference branch, predicting to obtain a predicted current according to the reference control vector, and adjusting the reference control vector or switching the main branch in an iterative mode until an error interval of the target current is met, so that a simulation result is obtained to be applied to a laser system. Each branch is used as an alternative main branch, and the method is different from the mode of fixing the main branch in the prior art, so that more diversified gain light output can be provided, the manufacturing cost of a laser system based on the existing system is reduced, meanwhile, the simulation type selection is carried out in a simulation environment, the laser system is deployed, and the extra cost of the system caused by debugging can be further reduced.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a laser control system based on simulation processing.
Background
In order to ensure the processing quality of the material and expand the processable range of the material, the field of material precision processing has higher requirements on the optical signal power of the fiber laser. Fiber lasers typically employ gain fibers to gain amplify an optical signal, and conventional fiber lasers typically boost the optical signal power by increasing the length of the gain fiber, as the longer the length of the gain fiber, the greater the power gain that can be achieved.
However, as the length of the gain fiber is further increased, the power gain is decreased, so that it is difficult to meet the requirements for high optical signal power, and the requirements for different materials for optical signal power are different.
Therefore, how to increase the richness of the output optical signal power of the laser system to meet the processing requirements in different scenes becomes a problem to be solved.
Disclosure of Invention
Aiming at the technical problems, the technical scheme adopted by the invention is a laser control system based on simulation processing, which comprises: the method comprises the steps of a first light source set A= { a 1,a2,...,am,...,aM }, a second light source X, an optical coupler set B= { B 1,b2,...,bm,...,bM,bM+1 }, a gain fiber set C= { C 1,c2,...,cm,...,cM }, a retarder set E= { E 1,e2,...,em,...,eM }, a beam splitter F, a photoelectric detector H, a database, a processor and a memory storing a computer program, wherein a m refers to an mth first light source, B m refers to an mth optical coupler, C m refers to an mth gain fiber, E m refers to an mth retarder, X, a m、bm、cm、em and F form an mth branch, the database comprises a pump light intensity set I= { I 1,i2,...,im,...,iM }, a target current J, a trained branch selection model K and a trained current prediction model L, I m refer to the light intensity of signal light in the mth first light source, and when the computer program is executed by the processor, the following steps are realized:
S1, carrying out probability prediction on M branches by using K according to I and J to obtain a prediction probability vector N= [ N 1,n2,...,nm,...,nM ], wherein N m refers to the prediction probability of the M-th branch selected as the main branch.
S2, arranging M prediction probabilities in N in order from big to small to obtain a prediction probability sequence O.
S3, initializing the selection flag y=1.
S4, taking a branch corresponding to the P-th bit in the O as a reference branch Q.
S5, initializing a reference control vector r=r 0, and iterating for a number of times t=1, where R 0 is a preset initial optocoupler control vector.
And S6, according to I, J, Q and R, carrying out current prediction by using L to obtain a predicted current S.
And S7, taking R as a target control vector P if |S-J| < =mar1, wherein mar1 refers to a preset first threshold value.
And S8, if the absolute value of S-J is greater than mar1, adjusting R according to the absolute value of S-J, and updating T=T+1.
And S9, returning to the steps S6 to S8 until P or T=mar2 is obtained, wherein mar2 refers to a preset second threshold value.
S10, if t=mar2, update y=y+1.
S11, returning to the steps S4 to S10 until P is obtained.
S12, deploying B, E, F and H according to P and Q.
Compared with the prior art, the laser control system based on simulation processing provided by the invention has obvious beneficial effects, can achieve quite technical progress and practicality, has wide industrial utilization value, and has at least the following beneficial effects: according to I and J, carrying out probability prediction on M branches by using K to obtain a prediction probability vector N= [ N 1,n2,...,nm,...,nM ], arranging M prediction probabilities in N according to the sequence from big to small to obtain a prediction probability sequence O, initializing a selection mark Y=1, taking a branch corresponding to the P-th bit in O as a reference branch Q, initializing a reference control vector R=r 0, carrying out current prediction according to I, J, Q and R by using L for the number of times T=1 to obtain a prediction current S, if |S-J| < = mar1, taking R as a target control vector P, if |S-J| > mar1, adjusting R according to |S-J|, updating T=T+1, returning to execute S6 to S8 steps until P or T=mar2 is obtained, if T=mar2, updating Y=Y+1, returning to execute S4 to S10 steps until P is obtained, and deploying B, E, F and H according to P and Q. It can be known that, each branch is used as an alternative main branch, which is different from the mode of fixing the main branch in the prior art, so that more diversified gain light output can be provided, the manufacturing cost of the laser system based on the existing system is reduced, meanwhile, the simulation and the model selection are performed in the simulation environment, and the laser system is deployed, so that the additional cost of the system caused by debugging can be further reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a computer program executed by a laser control system based on simulation processing according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The embodiment provides a laser control system based on simulation processing, the system includes: the method comprises the steps that a first light source set A= { a 1,a2,...,am,...,aM }, a second light source X, an optical coupler set B= { B 1,b2,...,bm,...,bM,bM+1 }, a gain optical fiber set C= { C 1,c2,...,cm,...,cM }, a retarder set E= { E 1,e2,...,em,...,eM }, a beam splitter F, a photoelectric detector H, a database, a processor and a memory storing a computer program, wherein a m refers to an mth first light source, B m refers to an mth optical coupler, C m refers to an mth gain optical fiber, E m refers to an mth retarder, X, a m、bm、cm、em and F form an mth branch, the database comprises a pump light intensity set I= { I 1,i2,...,im,...,iM }, a target current J, a trained branch selection model K and a trained current prediction model L, I m refer to the light intensity of signal light in the mth first light source, and the computer program is executed by the computer program of the simulation-based laser control system provided by the embodiment of the invention, when the computer program is executed by the processor, the method is realized by the following steps:
s1, carrying out probability prediction on M branches by using K according to I and J to obtain a prediction probability vector N= [ N 1,n2,...,nm,...,nM ], wherein N m refers to the prediction probability of the M-th branch selected as a main branch;
S2, arranging M prediction probabilities in N in order from large to small to obtain a prediction probability sequence O;
S3, initializing a selection identifier y=1;
s4, taking a branch corresponding to the P-th bit in the O as a reference branch Q;
S5, initializing a reference control vector R=r 0 and the iteration times T=1, wherein R 0 is a preset initial optocoupler control vector;
s6, according to I, J, Q and R, carrying out current prediction by using L to obtain a predicted current S;
s7, taking R as a target control vector P if |S-J| < =mar1, wherein mar1 refers to a preset first threshold value;
S8, if |S-J| > mar1, adjusting R according to |S-J|, and updating T=T+1;
s9, returning to the steps S6 to S8 until P or T=mar2 is obtained, wherein mar2 refers to a preset second threshold value;
s10, if t=mar2, updating y=y+1;
S11, returning to execute the steps S4 to S10 until P is obtained;
s12, deploying B, E, F and H according to P and Q.
In each branch, the first light source, the optical coupler, the gain fiber and the delay Shi Qiyi are connected in sequence, specifically, in the mth branch, the output end of X and the output end of a m are connected with the input end of b m, the output end of b m is connected with the input end of c m, the output end of c m is connected with the input end of e m, and the output end of e m is connected with the mth input end of F.
The first light source may be used to emit pump light, the input of the optical coupler includes the pump light, the signal light emitted by the first light source and the signal light outputted from the beam splitter, the gain fiber may be used to amplify the optical signal, and in general, the length of the gain fiber has a mapping relationship with the gain capability of the gain fiber to the optical signal power, and it should be noted that in order to improve the richness of the output optical signal power, it is recommended that different branches use gain fibers with different lengths.
The trained branch selection model K can adopt a first training set formed in a historical scene, the first training set comprises a plurality of first training samples and first labels corresponding to the first training samples, the first training samples can be respectively corresponding to M branches configured in the historical scene, the corresponding first labels can be current main branches, namely K can output the probability of each branch as a main branch according to the pumping light intensity information of the M branches, and because the training set is acquired based on the historical scene, the output of K can be attached to a multi-branch laser system of the existing fixed main branch as much as possible.
The trained current prediction model L may employ a second training set formed in a simulation scenario, where the pumping light intensity of each branch, the main branch, and the operation condition of each optocoupler may be set as a second training sample, and then a corresponding output current may be obtained by simulation as a corresponding second tag.
Specifically, when |s-j| < =mar1, it is indicated that the output current has already met the error interval of the target current, when |s-j| > mar1, it is indicated that the output current cannot meet the error interval of the target current, at this time, R is adjusted, that is, the operation condition of the optocouplers of each branch is adjusted, so that the output current meets the error interval of the target current, if the output current still cannot meet the condition after multiple adjustments, that is, t=mar2, the main branch is considered to be selected incorrectly at this time, the main branch is reselected, and the operation condition of the optocouplers of each branch is readjusted until the output current meets the error interval of the target current.
In one embodiment, r 0 includes M zero elements.
Wherein a zero element indicates that the corresponding branch optocoupler is not closed.
In one embodiment, the practitioner may also set the element corresponding to the primary branch to 1 to reduce the difficulty of R adjustment.
In one embodiment, mar1=0.05×j.
In this embodiment, the error acceptance degree is 5%, and the practitioner can adjust the error acceptance degree according to the actual situation, thereby adjusting mar1.
In one embodiment, S8 specifically includes the following steps:
r is adjusted using a gradient descent method according to |s-j|, and t=t+1 is updated.
In this embodiment, a gradient descent method is used to determine the element in R that needs to be adjusted.
In one embodiment, mar2=50.
Here, mar2 is set to 50, that is, if R is adjusted 50 times and the error interval of the target current cannot be satisfied, the main branch is reselected, and it should be noted that the practitioner may adjust mar2 according to the actual situation.
In one embodiment, H is deployed at the output location of the gain fiber in Q.
The deployment process refers to applying a simulation result to a laser system under a real scene, and deploying H at an output position of the gain fiber in Q at the moment so as to monitor the output current of the gain fiber in Q.
In a specific embodiment, r= { u 1,u2,...,um,...,uM }, where u m refers to the control state of the mth optocoupler, u m e {0,1}.
Wherein, the element in R can take the value of 0 or 1.
In order to more effectively apply the gradient descent method, 0 and 1 may be represented by (-1) ≡v, and when the adjustment step length of v is 1, the switching between 0 and 1 may be achieved by means of fixed step length adjustment.
In a specific embodiment, the step S12 further includes the following steps:
s121, when u m =0, control b m is not closed;
S122, when u m =1, control b m operates.
In a specific embodiment, the step S12 further includes the following steps:
S123, determining the corresponding adjustment amplitude of the branch where any running optical coupler is located under the condition that the main branch is Q through a preset first mapping table;
S124, according to the corresponding adjustment amplitude of the branch circuit where the operating optical coupler is located, adjusting the delayer in the branch circuit where the operating optical coupler is located.
The first mapping table may include an adjustment amplitude between each of the other branches and the main branch when each of the branches is used as the main branch, where the adjustment amplitude may be determined according to a length relationship of the gain fiber between each of the other branches and the main branch.
The purpose of the retarder is to make the optical phase of the non-primary branch coincide with the optical phase of the primary branch.
In a specific embodiment, the step S12 further includes the following steps:
S125, determining the corresponding light splitting proportion of the branch where any running optical coupler is located under the condition that the main branch is Q by a preset second mapping table;
S126, adjusting the beam splitting quantity of the F received by the branch where the running optical coupler is located according to the beam splitting proportion corresponding to the branch where the running optical coupler is located.
The second mapping table may include a splitting ratio between each of the other branches and the main branch when each of the branches is used as the main branch.
According to I and J, carrying out probability prediction on M branches by using K to obtain a prediction probability vector N= [ N 1,n2,...,nm,...,nM ], arranging M prediction probabilities in N according to the sequence from big to small to obtain a prediction probability sequence O, initializing a selection mark P=1, taking a branch corresponding to the P-th bit in O as a reference branch Q, initializing a reference control vector R=r 0, carrying out current prediction according to I, J, Q and R by using L for the number of times T=1 to obtain a prediction current S, if |S-J| < = mar1, taking R as a target control vector P, if |S-J| > mar1, adjusting R according to |S-J|, updating T=T+1, returning to execute S6 to S8 steps until P or T=mar2 is obtained, if T=mar2 is increased by 1, returning to execute S4 to S10 steps until P is obtained, and deploying B, E, F and H according to P and Q. It can be known that each branch is used as an alternative main branch, which is different from the mode of fixing the main branch in the prior art, so that more diversified gain light output can be provided, the manufacturing cost of the laser system based on the existing system is reduced, meanwhile, the simulation and the model selection are performed in the simulation environment, and the laser system is deployed, so that the additional cost of the system caused by debugging can be further reduced.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. Those skilled in the art will also appreciate that many modifications may be made to the embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A laser control system based on a simulation process, the system comprising: the method comprises the steps of a first light source set A= { a 1,a2,...,am,...,aM }, a second light source X, an optical coupler set B= { B 1,b2,...,bm,...,bM,bM+1 }, a gain fiber set C= { C 1,c2,...,cm,...,cM }, a delay set E= { E 1,e2,...,em,...,eM }, a beam splitter F, a photoelectric detector H, a database, a processor and a memory storing a computer program, wherein a m refers to an mth first light source, B m refers to an mth optical coupler, C m refers to an mth gain fiber, E m refers to an mth delay, X, a m、bm、cm、em and F form an mth branch, the database comprises a pump light intensity set I= { I 1,i2,...,im,...,iM }, a target current J, a trained branch selection model K and a trained current prediction model L, I m refer to the light intensity of signal light in the mth first light source, and when the computer program is executed by the processor, the steps of:
s1, carrying out probability prediction on M branches by using K according to I and J to obtain a prediction probability vector N= [ N 1,n2,...,nm,...,nM ], wherein N m refers to the prediction probability of the M-th branch selected as a main branch;
S2, arranging M prediction probabilities in N in order from large to small to obtain a prediction probability sequence O;
S3, initializing a selection identifier y=1;
s4, taking a branch corresponding to the P-th bit in the O as a reference branch Q;
S5, initializing a reference control vector R=r 0 and the iteration times T=1, wherein R 0 is a preset initial optocoupler control vector;
s6, according to I, J, Q and R, carrying out current prediction by using L to obtain a predicted current S;
s7, taking R as a target control vector P if |S-J| < =mar1, wherein mar1 refers to a preset first threshold value;
S8, if |S-J| > mar1, adjusting R according to |S-J|, and updating T=T+1;
s9, returning to the steps S6 to S8 until P or T=mar2 is obtained, wherein mar2 refers to a preset second threshold value;
s10, if t=mar2, updating y=y+1;
S11, returning to execute the steps S4 to S10 until P is obtained;
s12, deploying B, E, F and H according to P and Q.
2. The laser control system based on simulation processing of claim 1, wherein r 0 comprises M zero elements.
3. The laser control system based on simulation processing of claim 1, wherein mar1 = 0.05 x j.
4. The laser control system based on simulation process according to claim 1, wherein S8 specifically comprises the steps of:
r is adjusted using a gradient descent method according to |s-j|, and t=t+1 is updated.
5. The laser control system based on simulation processing of claim 1, wherein mar2 = 50.
6. The laser control system based on simulation process of claim 1, wherein H is deployed at the output position of the gain fiber in Q.
7. The laser control system based on simulation processing of claim 1, wherein r= { u 1,u2,...,um,...,uM }, where u m refers to the control state of the mth optocoupler, u m e {0,1}.
8. The laser control system based on simulation process according to claim 7, wherein S12 further comprises the steps of:
s121, when u m =0, control b m is not closed;
S122, when u m =1, control b m operates.
9. The laser control system based on simulation process according to claim 8, wherein S12 further comprises the steps of:
S123, determining the corresponding adjustment amplitude of the branch where any running optical coupler is located under the condition that the main branch is Q through a preset first mapping table;
S124, according to the corresponding adjustment amplitude of the branch circuit where the operating optical coupler is located, adjusting the delayer in the branch circuit where the operating optical coupler is located.
10. The laser control system based on simulation process according to claim 8, wherein S12 further comprises the steps of:
S125, determining the corresponding light splitting proportion of the branch where any running optical coupler is located under the condition that the main branch is Q by a preset second mapping table;
S126, adjusting the beam splitting quantity of the F received by the branch where the running optical coupler is located according to the beam splitting proportion corresponding to the branch where the running optical coupler is located.
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| CN109787081A (en) * | 2019-01-23 | 2019-05-21 | 广东朗研科技有限公司 | Mid-infrared ultra-short pulse laser light source |
| CN110429462A (en) * | 2019-07-01 | 2019-11-08 | 重庆文理学院 | A kind of ultra-short pulse laser light source |
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