CN117347928A - Automatic calibration method, system and medium for laser power ratio parameters - Google Patents
Automatic calibration method, system and medium for laser power ratio parameters Download PDFInfo
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Abstract
The embodiment of the application provides a laser power ratio parameter automatic calibration method, a system and a medium, wherein the method comprises the following steps: acquiring laser parameter information, and converting different laser frequencies into microwave bands according to a laser frequency down-conversion technology to obtain relative powers of the different laser frequencies; setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters; calculating according to the power ratio information of the relative laser power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result; feeding back the calibration result to the terminal; the method can be used for cold atom gravimeter, coherent population trapping atomic clock and other equivalent sensing devices, can realize the relative power calibration between different laser frequencies, and can greatly improve the laser power ratio parameter calibration efficiency and the system environment adaptability.
Description
Technical Field
The application relates to the field of laser parameter calibration, in particular to an automatic calibration method, an automatic calibration system and an automatic calibration medium for laser power ratio parameters.
Background
The atomic interferometer has the core that the control of different atomic states is realized by utilizing laser, different frequencies of laser are needed at different calibration nodes, for example, in the stage of cooling the atoms by the laser, the combined action of cooling light and pump return light is needed, and the optimal parameters exist in the power ratio of the two to obtain high-quality cold atomic groups; in the atomic interference stage, a pair of raman light with a fixed power ratio is required to realize atomic interference so as to reduce measurement uncertainty caused by optical frequency shift, and therefore, in the laser cooling and atomic interference processes, laser light with two frequency components with a frequency difference of atomic ground state energy level intervals is required. In the experiment, the laser can be obtained by adopting a laser beam combining or phase modulation method, and the calibration of the power ratio parameters among different frequency components in the laser after beam combining can be realized by utilizing experimental equipment such as an F-P cavity or a spectrometer, but the laser power parameters or the modulation depth of an electro-optical crystal (EOM) are influenced by the characteristics of the crystal, the microwave driving parameters and the like, so that the inherent problems of long-term drift exist, and the calibration is needed regularly. Meanwhile, because the F-P cavity, the spectrometer and other test equipment systems are huge and complex to use, and the parameters of the atomic interferometer tested in a field complex environment are required to be frequently calibrated, and the traditional calibration scheme has obvious defects, the invention provides an automatic calibration technology for laser power ratio parameters, which can remarkably improve the environmental adaptability of the atomic interferometer and can be widely applied to atomic interferometers such as atomic clocks and cold atomic gravimeters.
Disclosure of Invention
The embodiment of the application aims to provide a laser power ratio parameter automatic calibration method, a laser power ratio parameter automatic calibration system and a laser power ratio parameter automatic calibration medium.
The embodiment of the application also provides an automatic calibration method for the laser power ratio parameters, which comprises the following steps:
acquiring laser parameter information, and converting different laser frequencies into a microwave band by a laser frequency down-conversion technology to obtain the relative power of the different laser frequencies;
setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters;
calculating according to the power ratio information of the relative power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result;
and feeding back the calibration result to the terminal.
Optionally, in the method for automatically calibrating the laser power ratio parameter according to the embodiment of the present application, laser parameter information is obtained, and different laser frequencies are converted according to a laser frequency down-conversion technology to obtain relative powers of the different laser frequencies, which specifically includes:
the laser comprises measurement and control laser and reference laser, and is used for realizing the down-conversion of the frequency of the measurement and control laser by introducing a beam of reference laser so as to obtain the relative power information among different frequency components of the measurement and control laser;
detecting the microwave power of two measurement and control lasers with different laser frequencies according to the frequency conversion result to obtain two microwave power detection results;
and calculating the relative power between different measurement and control laser frequencies according to the two microwave power detection results.
Optionally, in the method for automatically calibrating the laser power ratio parameter according to the embodiment of the present application, the microwave powers of two measurement and control lasers with different frequencies are detected according to the frequency conversion result, which specifically includes:
acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
the modulated measurement and control laser is divided into two beams, and the two beams are respectively recorded as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as external output, the second measurement and control laser and the reference laser perform beat frequency, the optical frequency is converted into a microwave band, the microwave signal power is detected, and the relative power information of different frequency components of the second measurement and control laser is obtained.
Optionally, in the method for automatically calibrating the laser power ratio parameter according to the embodiment of the present application, the method further includes: acquiring beat frequency signals, performing power processing, and obtaining power ratio parameters;
and (3) scanning the power ratio control parameters to obtain the relative intensities of the lasers with different frequencies in the measurement and control lasers under different parameter conditions, and performing numerical fitting by using a computer to obtain the corresponding optimal power ratio control parameters in different experimental processes.
Optionally, in the method for automatically calibrating the laser power ratio parameter according to the embodiment of the present application, the optimal control parameters under different calibration nodes are generated according to the calculation of the power ratio information corresponding to the relative power and the different calibration nodes, so as to form a calibration result, which specifically includes:
performing control parameter traversal scanning on different calibration nodes in stages according to the calibration nodes;
judging whether the traversing scanning result is finished or not;
if so, scanning the control parameters of all the calibration nodes to obtain scanning data, and processing the scanning data to obtain optimal control parameters to form a calibration result;
if the traversal scanning is not completed, generating intermediate data, and performing control parameter traversal scanning on the intermediate data again.
In a second aspect, an embodiment of the present application provides an automatic calibration system for a laser power ratio parameter, where the system includes: the device comprises a memory and a processor, wherein the memory comprises a program of an automatic laser power ratio parameter calibration method, and the program of the automatic laser power ratio parameter calibration method realizes the following steps when being executed by the processor:
acquiring laser parameter information, and converting different laser frequencies into a microwave band by a laser frequency down-conversion technology to obtain the relative power of the different laser frequencies;
setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters;
calculating according to the power ratio information of the relative power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result;
and feeding back the calibration result to the terminal.
Optionally, in the automatic calibration system for laser power ratio parameters according to the embodiment of the present application, laser parameter information is obtained, and different laser frequencies are converted according to a laser frequency down-conversion technology to obtain relative powers of the different laser frequencies, which specifically includes:
the laser comprises measurement and control laser and reference laser, and is used for realizing the down-conversion of the frequency of the measurement and control laser by introducing a beam of reference laser so as to obtain the relative power information among different frequency components of the measurement and control laser;
detecting the microwave power of two measurement and control lasers with different laser frequencies according to the frequency conversion result to obtain two microwave power detection results;
and calculating the relative power between different measurement and control laser frequencies according to the two microwave power detection results.
Optionally, in the automatic calibration system for laser power ratio parameters according to the embodiment of the present application, the microwave powers of two measurement and control lasers with different frequencies are detected according to the frequency conversion result, which specifically includes:
acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
the modulated measurement and control laser is divided into two beams, and the two beams are respectively recorded as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as external output, the second measurement and control laser and the reference laser perform beat frequency, the optical frequency is converted into a microwave band, the microwave signal power is detected, and the relative power information of different frequency components of the second measurement and control laser is obtained.
In a third aspect, an embodiment of the present application further provides a computer readable storage medium, where the computer readable storage medium includes a laser power ratio parameter automatic calibration method program, where the laser power ratio parameter automatic calibration method program, when executed by a processor, implements the foregoing steps of the laser power ratio parameter automatic calibration method.
As can be seen from the above, according to the method, system and medium for automatically calibrating the laser power ratio parameter provided by the embodiments of the present application, by obtaining the laser parameter information, different laser frequencies are converted into the microwave band according to the laser frequency down-conversion technology, so as to obtain the relative powers of the different laser frequencies; setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters; calculating according to the power ratio information of the relative laser power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result; feeding back the calibration result to the terminal; the method can be used for cold atom gravimeter, coherent population trapping atomic clock and other equivalent sensing devices, can realize the relative power calibration between different laser frequencies, and can greatly improve the laser power ratio parameter calibration efficiency and the system environment adaptability.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be realized and attained by the structure particularly pointed out in the written description and claims hereof, as well as the appended drawings.
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In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related 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 method for automatically calibrating laser power ratio parameters according to an embodiment of the present application;
FIG. 2 is a flow chart of obtaining relative power between different measurement and control laser frequencies of the automatic calibration method for laser power ratio parameters according to the embodiment of the present application;
FIG. 3 is a flowchart of calculating optimal control parameters for different nodes of the automatic calibration method for laser power ratio parameters according to the embodiment of the present application;
FIG. 4 is a schematic diagram of calibration of different laser frequency components relative to power parameters according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an automatic calibration system for laser power ratio parameters according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a flowchart of a method for automatically calibrating laser power ratio parameters according to some embodiments of the present application. The automatic calibration method for the laser power ratio parameters is used in terminal equipment and comprises the following steps:
s101, acquiring laser parameter information, and converting different laser frequencies to a microwave band through a laser frequency down-conversion technology to obtain relative powers of the different laser frequencies;
s102, setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters;
s103, calculating according to the power ratio information of the relative power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result;
s104, feeding back the calibration result to the terminal.
It should be noted that the calibration process includes 4 stages, namely, measurement stages: the relative power measurement of different laser frequency components is realized by utilizing a laser frequency down-conversion technology;
calibration: traversing the control parameters under different calibration nodes to obtain laser power ratio information under different control parameters;
the treatment stage comprises the following steps: obtaining measurement data according to the calibration process, obtaining the relative power between laser frequency components under different parameters, and confirming the optimal control parameters under different calibration nodes;
and (3) calibration is finished: and feeding back experimental parameters to an experimental system according to the calibration result, and carrying out corresponding experiments.
Referring to fig. 2, fig. 2 is a flow chart of relative power acquisition between different measurement and control laser frequencies of a laser power ratio parameter automatic calibration method according to some embodiments of the present application. According to the embodiment of the invention, the laser parameter information is acquired, and different laser frequencies are converted according to the laser frequency down-conversion technology to obtain the relative power of the different laser frequencies, specifically:
s201, the laser comprises measurement and control laser and reference laser, and a beam of reference laser is introduced to realize the down-conversion of the frequency of the measurement and control laser so as to obtain the relative power information among different frequency components of the measurement and control laser;
s202, respectively detecting the microwave power of two measurement and control lasers with different laser frequencies according to the frequency conversion result to obtain two microwave power detection results;
s203, calculating the relative power between different measurement and control laser frequencies according to the two microwave power detection results.
According to the embodiment of the invention, the microwave power of two measurement and control lasers with different frequencies is detected according to the frequency conversion result, specifically:
acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
the modulated measurement and control laser is divided into two beams, and the two beams are respectively recorded as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as external output, the second measurement and control laser and the reference laser perform beat frequency, the optical frequency is converted into a microwave band, the microwave signal power is detected, and the relative power information of different frequency components of the second measurement and control laser is obtained.
It should be noted that, the measurement and control laser is used for realizing specific operation, the power components among different optical frequencies are realized by a power ratio modulation module, and for phase modulation, the power of an EOM driving source is changed; and for the scheme of laser beam combining, the control of the power ratio is realized by respectively changing the power of two beams of light.
Referring to fig. 3, fig. 3 is a flowchart of calculating optimal control parameters for different nodes of a laser power ratio parameter automatic calibration method according to some embodiments of the present application. According to the embodiment of the invention, after the measurement and control laser is obtained and the power ratio information of the measurement and control laser is modulated, the method further comprises the following steps:
s301, acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
s302, dividing the modulated measurement and control laser into two beams, respectively marking the two beams as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as main output, and the second measurement and control laser and the reference laser are combined;
s303, traversing and scanning the control parameters with different power ratios, and obtaining the optimal control parameters of different nodes.
According to an embodiment of the present invention, further comprising: acquiring beat frequency signals, performing power processing, and obtaining power ratio parameters;
and (3) scanning the power ratio control parameters to obtain the relative intensities of the lasers with different frequencies in the measurement and control lasers under different parameter conditions, and performing numerical fitting by using a computer to obtain the corresponding optimal power ratio control parameters in different experimental processes.
According to the embodiment of the invention, according to the calculation of the relative power and the power ratio information corresponding to different calibration nodes, the optimal control parameters under the different calibration nodes are generated, and the calibration result is formed, specifically:
performing control parameter traversal scanning on different calibration nodes in stages according to the calibration nodes;
judging whether the traversing scanning result is finished or not;
if so, scanning the control parameters of all the calibration nodes to obtain scanning data, and processing the scanning data to obtain optimal control parameters to form a calibration result;
if the traversal scanning is not completed, generating intermediate data, and performing control parameter traversal scanning on the intermediate data again.
After the automatic calibration operation of the power ratio is started, the controller firstly transmits the power ratio control parameters required by different time nodes, and traverses and scans all the parameters so as to change the power ratio parameters of different frequency components of the measurement and control laser and record the power ratio information corresponding to the different parameters. After the parameters of the first calibration node are traversed, starting parameter scanning of the second calibration node, and similarly, carrying out traversal scanning on the power ratio parameters under the second calibration node, processing data of different calibration nodes after the parameter scanning of all the calibration nodes is completed, and calculating power ratio control parameters required by the different calibration nodes according to experimental requirements, thereby completing the calibration of experimental parameters.
According to an embodiment of the present invention, further comprising: the principle of detecting the laser frequency down-conversion to the microwave band is realized based on the beat frequency process, and the principle is as follows:
the components of the different frequency components of the laser can be expressed as:
wherein,、/>、/>the electric fields of the reference laser, the measurement and control laser frequency 1 and the measurement and control laser frequency 2 are respectively represented by +.>、/>、/>Respectively represent the amplitudes of three laser beams, +.>、/>、/>Represents the frequency of the three lasers, +.>、、/>Representing the initial phases of the three laser beams, the beat signal detected by the high-speed photoelectric tube can be expressed as:
wherein the method comprises the steps ofIs->Respectively representing the frequency difference between the measurement and control laser 1 and the measurement and control laser 2 and the reference laser, +.>And->Respectively representing the detection efficiency of the high-speed photoelectric tube at different optical frequencies, and at different calibration nodes, < >>And->Corresponding to different beat frequencies, the beat frequencies are respectively +.>And->At the calibration node 2, the beat frequencies are +.>And. The beat frequency signal passes through the power ratio detection module, after signal power division and low-pass filtering, the signal detection device is used for converting microwave frequency into analog voltage signals, so that the power information of laser signals with different frequencies can be converted into observable voltage signals, and finally the relative intensity information between the laser frequencies can be obtained by back-pushing.
As shown in fig. 4, by introducing a reference laser beam for implementing down-conversion of the measurement and control laser frequency, two laser beams with small frequency difference, which cannot be directly detected, are converted into microwave bands, and microwave power detection is respectively performed, so as to obtain the relative power between different optical frequencies, the modulated measurement and control laser beam is divided into two beams, most of the measurement and control laser beams are used as main output, and the output is subjected to a related test experiment. And combining a small part of power with the reference laser, outputting the combined power to a high-speed photoelectric tube to realize beat frequency among different laser frequencies, outputting beat frequency signals to a power ratio detection module, filtering the beat frequency signals and detecting the power, and inputting the beat frequency signals to a power ratio parameter acquisition and control module.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an automatic calibration system for laser power ratio parameters according to some embodiments of the present application. In a second aspect, embodiments of the present application provide an automatic calibration system 5 for laser power ratio parameters, the system including: the memory 51 and the processor 52, the memory 51 includes a program of the automatic calibration method of laser power ratio parameter, when the program of the automatic calibration method of laser power ratio parameter is executed by the processor, the following steps are implemented:
acquiring laser parameter information, and converting different laser frequencies into a microwave band by a laser frequency down-conversion technology to obtain the relative power of the different laser frequencies;
setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters;
calculating according to the power ratio information of the relative power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result;
and feeding back the calibration result to the terminal.
It should be noted that the calibration process includes 4 stages, namely, measurement stages: the relative power measurement of different laser frequency components is realized by utilizing a laser frequency down-conversion technology;
calibration: traversing the control parameters under different calibration nodes to obtain laser power ratio information under different control parameters;
the treatment stage comprises the following steps: obtaining measurement data according to the calibration process, obtaining the relative power between laser frequency components under different parameters, and confirming the optimal control parameters under different calibration nodes;
and (3) calibration is finished: and feeding back experimental parameters to an experimental system according to the calibration result, and carrying out corresponding experiments.
According to the embodiment of the invention, the laser parameter information is acquired, and different laser frequencies are converted according to the laser frequency down-conversion technology to obtain the relative power of the different laser frequencies, specifically:
the laser comprises measurement and control laser and reference laser, and is used for realizing the down-conversion of the frequency of the measurement and control laser by introducing a beam of reference laser so as to obtain the relative power information among different frequency components of the measurement and control laser;
detecting the microwave power of two measurement and control lasers with different laser frequencies according to the frequency conversion result to obtain two microwave power detection results;
and calculating the relative power between different measurement and control laser frequencies according to the two microwave power detection results.
According to the embodiment of the invention, the microwave power of two measurement and control lasers with different frequencies is detected according to the frequency conversion result, specifically:
acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
the modulated measurement and control laser is divided into two beams, and the two beams are respectively recorded as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as external output, the second measurement and control laser and the reference laser perform beat frequency, the optical frequency is converted into a microwave band, the microwave signal power is detected, and the relative power information of different frequency components of the second measurement and control laser is obtained.
It should be noted that, the measurement and control laser is used for realizing specific operation, the power components among different optical frequencies are realized by a power ratio modulation module, and for phase modulation, the power of an EOM driving source is changed; and for the scheme of laser beam combining, the control of the power ratio is realized by respectively changing the power of two beams of light.
According to the embodiment of the invention, after the measurement and control laser is obtained and the power ratio information of the measurement and control laser is modulated, the method further comprises the following steps:
s301, acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
s302, dividing the modulated measurement and control laser into two beams, respectively marking the two beams as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as main output, and the second measurement and control laser and the reference laser are combined;
s303, traversing and scanning the control parameters with different power ratios, and obtaining the optimal control parameters of different nodes.
According to an embodiment of the present invention, further comprising: acquiring beat frequency signals, performing power processing, and obtaining power ratio parameters;
and (3) scanning the power ratio control parameters to obtain the relative intensities of the lasers with different frequencies in the measurement and control lasers under different parameter conditions, and performing numerical fitting by using a computer to obtain the corresponding optimal power ratio control parameters in different experimental processes.
According to the embodiment of the invention, according to the calculation of the relative power and the power ratio information corresponding to different calibration nodes, the optimal control parameters under the different calibration nodes are generated, and the calibration result is formed, specifically:
performing control parameter traversal scanning on different calibration nodes in stages according to the calibration nodes;
judging whether the traversing scanning result is finished or not;
if so, scanning the control parameters of all the calibration nodes to obtain scanning data, and processing the scanning data to obtain optimal control parameters to form a calibration result;
if the traversal scanning is not completed, generating intermediate data, and performing control parameter traversal scanning on the intermediate data again.
After the automatic calibration operation of the power ratio is started, the controller firstly transmits the power ratio control parameters required by different time nodes, and traverses and scans all the parameters so as to change the power ratio parameters of different frequency components of the measurement and control laser and record the power ratio information corresponding to the different parameters. After the parameters of the first calibration node are traversed, starting parameter scanning of the second calibration node, and similarly, carrying out traversal scanning on the power ratio parameters under the second calibration node, processing data of different calibration nodes after the parameter scanning of all the calibration nodes is completed, and calculating power ratio control parameters required by the different calibration nodes according to experimental requirements, thereby completing the calibration of experimental parameters.
According to an embodiment of the present invention, further comprising: the principle of detecting the laser frequency down-conversion to the microwave band is realized based on the beat frequency process, and the principle is as follows:
the components of the different frequency components of the laser can be expressed as:
wherein,、/>、/>the electric fields of the reference laser, the measurement and control laser frequency 1 and the measurement and control laser frequency 2 are respectively represented by +.>、/>、/>Respectively represent the amplitudes of three laser beams, +.>、/>、/>Represents the frequency of the three lasers, +.>、、/>Representing the initial phases of the three laser beams, the beat signal detected by the high-speed photoelectric tube can be expressed as:
wherein the method comprises the steps ofIs->Respectively representing the frequency difference between the measurement and control laser 1 and the measurement and control laser 2 and the reference laser, +.>And->Respectively representing the detection efficiency of the high-speed photoelectric tube at different optical frequencies, and at different calibration nodes, < >>And->Corresponding to different beat frequencies, the beat frequencies are respectively +.>And->At the calibration node 2, the beat frequencies are +.>And. The beat frequency signal passes through a power ratio detection module, and after signal power division and low-pass filtering, the signal detection device realizes microwave frequency to analog electricityThe conversion of the voltage signal can convert the power information of the laser signals with different frequencies into an observable voltage signal, and finally the relative intensity information between the laser frequencies can be obtained by back-pushing.
As shown in fig. 4, by introducing a reference laser beam for implementing down-conversion of the measurement and control laser frequency, two laser beams with small frequency difference, which cannot be directly detected, are converted into microwave bands, and microwave power detection is respectively performed, so as to obtain the relative power between different optical frequencies, the modulated measurement and control laser beam is divided into two beams, most of the measurement and control laser beams are used as main output, and the output is subjected to a related test experiment. And combining a small part of power with the reference laser, outputting the combined power to a high-speed photoelectric tube to realize beat frequency among different laser frequencies, outputting beat frequency signals to a power ratio detection module, filtering the beat frequency signals and detecting the power, and inputting the beat frequency signals to a power ratio parameter acquisition and control module.
A third aspect of the present invention provides a computer readable storage medium, the readable storage medium including a laser power ratio parameter automatic calibration method program, which when executed by a processor, implements the steps of the foregoing automatic calibration method for laser power ratio parameters.
According to the laser power ratio parameter automatic calibration method, system and medium disclosed by the invention, different laser frequencies are converted into microwave bands according to a laser frequency down-conversion technology by acquiring laser parameter information, so that the relative powers of the different laser frequencies are obtained; setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters; calculating according to the power ratio information of the relative laser power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result; feeding back the calibration result to the terminal; the method can be used for cold atom gravimeter, coherent population trapping atomic clock and other equivalent sensing devices, can realize the relative power calibration between different laser frequencies, and can greatly improve the laser power ratio parameter calibration efficiency and the system environment adaptability.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of units is only one logical function division, and there may be other divisions in actual implementation, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units; can be located in one place or distributed to a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware related to program instructions, and the foregoing program may be stored in a readable storage medium, where the program, when executed, performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or the like, which can store program codes.
Alternatively, the above-described integrated units of the present invention may be stored in a readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.
Claims (9)
1. The automatic calibration method for the laser power ratio parameter is characterized by comprising the following steps of:
acquiring laser parameter information, and converting different laser frequencies into a microwave band by a laser frequency down-conversion technology to obtain the relative power of the different laser frequencies;
setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters;
calculating according to the power ratio information of the relative power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result;
and feeding back the calibration result to the terminal.
2. The automatic calibration method of laser power ratio parameters according to claim 1, wherein the laser parameter information is obtained, different laser frequencies are converted according to a laser frequency down-conversion technology, and the relative powers of the different laser frequencies are obtained, specifically:
the laser comprises measurement and control laser and reference laser, and is used for realizing the down-conversion of the frequency of the measurement and control laser by introducing a beam of reference laser so as to obtain the relative power information among different frequency components of the measurement and control laser;
detecting the microwave power of two measurement and control lasers with different laser frequencies according to the frequency conversion result to obtain two microwave power detection results;
and calculating the relative power between different measurement and control laser frequencies according to the two microwave power detection results.
3. The automatic calibration method of laser power ratio parameters according to claim 2, wherein the microwave power of two measurement and control lasers with different frequencies is detected according to the frequency conversion result, specifically:
acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
the modulated measurement and control laser is divided into two beams, and the two beams are respectively recorded as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as external output, the second measurement and control laser and the reference laser perform beat frequency, the optical frequency is converted into a microwave band, the microwave signal power is detected, and the relative power information of different frequency components of the second measurement and control laser is obtained.
4. The automatic calibration method for laser power ratio parameters according to claim 3, wherein,
further comprises: acquiring beat frequency signals, performing power processing, and obtaining power ratio parameters;
and (3) scanning the power ratio control parameters to obtain the relative intensities of the lasers with different frequencies in the measurement and control lasers under different parameter conditions, and performing numerical fitting by using a computer to obtain the corresponding optimal power ratio control parameters in different experimental processes.
5. The automatic calibration method of laser power ratio parameters according to claim 4, wherein the calculation is performed according to the power ratio information corresponding to the relative power and different calibration nodes to generate the optimal control parameters under the different calibration nodes, so as to form a calibration result, specifically:
performing control parameter traversal scanning on different calibration nodes in stages according to the calibration nodes;
judging whether the traversing scanning result is finished or not;
if so, scanning the control parameters of all the calibration nodes to obtain scanning data, and processing the scanning data to obtain optimal control parameters to form a calibration result;
if the traversal scanning is not completed, generating intermediate data, and performing control parameter traversal scanning on the intermediate data again.
6. An automatic calibration system for laser power ratio parameters is characterized in that the system comprises: the device comprises a memory and a processor, wherein the memory comprises a program of an automatic laser power ratio parameter calibration method, and the program of the automatic laser power ratio parameter calibration method realizes the following steps when being executed by the processor:
acquiring laser parameter information, and converting different laser frequencies into a microwave band by a laser frequency down-conversion technology to obtain the relative power of the different laser frequencies;
setting calibration nodes, obtaining control parameters of different calibration nodes, and calculating power ratio information corresponding to the different calibration nodes according to the control parameters;
calculating according to the power ratio information of the relative power and the corresponding power ratio information of different calibration nodes, generating optimal control parameters under the different calibration nodes, and forming a calibration result;
and feeding back the calibration result to the terminal.
7. The automatic calibration system of laser power ratio parameters according to claim 6, wherein the laser parameter information is obtained, and different laser frequencies are converted according to a laser frequency down-conversion technology to obtain the relative powers of the different laser frequencies, specifically:
the laser comprises measurement and control laser and reference laser, and is used for realizing the down-conversion of the frequency of the measurement and control laser by introducing a beam of reference laser so as to obtain the relative power information among different frequency components of the measurement and control laser;
detecting the microwave power of two measurement and control lasers with different laser frequencies according to the frequency conversion result to obtain two microwave power detection results;
and calculating the relative power between different measurement and control laser frequencies according to the two microwave power detection results.
8. The automatic calibration system of laser power ratio parameters according to claim 7, wherein the microwave power of two measurement and control lasers with different frequencies is detected according to the frequency conversion result, specifically:
acquiring measurement and control laser, and modulating power ratio information of the measurement and control laser;
the modulated measurement and control laser is divided into two beams, and the two beams are respectively recorded as a first measurement and control laser and a second measurement and control laser, wherein the first measurement and control laser is used as external output, the second measurement and control laser and the reference laser perform beat frequency, the optical frequency is converted into a microwave band, the microwave signal power is detected, and the relative power information of different frequency components of the second measurement and control laser is obtained.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium contains a laser power ratio parameter automatic calibration method program, which, when executed by a processor, implements the steps of the laser power ratio parameter automatic calibration method according to any one of claims 1 to 5.
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