CN114415487A - Automatic locking method and system for frequency of optical frequency atomic clock - Google Patents
Automatic locking method and system for frequency of optical frequency atomic clock Download PDFInfo
- Publication number
- CN114415487A CN114415487A CN202111502002.7A CN202111502002A CN114415487A CN 114415487 A CN114415487 A CN 114415487A CN 202111502002 A CN202111502002 A CN 202111502002A CN 114415487 A CN114415487 A CN 114415487A
- Authority
- CN
- China
- Prior art keywords
- laser
- frequency
- atomic
- resonant
- locking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000003287 optical effect Effects 0.000 title claims abstract description 29
- 230000007704 transition Effects 0.000 claims abstract description 43
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 37
- 239000011575 calcium Substances 0.000 claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims description 31
- 238000004590 computer program Methods 0.000 claims description 19
- 238000001228 spectrum Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 abstract description 5
- 238000011105 stabilization Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000000872 buffer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/14—Apparatus for producing preselected time intervals for use as timing standards using atomic clocks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention provides a method and a system for automatically locking the frequency of an optical frequency atomic clock, wherein the frequency of a first resonance laser is stabilized in a first frequency range in which atomic transition occurs in calcium atomic flow by adjusting corresponding laser parameters, and a second resonance laser is firstly subjected to frequency stabilization in a resonant cavity and then is locked from the offset of the second resonance laser to the atomic resonance frequency, so that the locking of two lasers can be controlled simultaneously, the manual input is reduced, and the human resources are saved; the man-made interference is reduced, and the man-made locking is avoided; the recovery speed is fast after the lock is lost.
Description
Technical Field
The invention relates to a laser frequency stabilization technology, in particular to an automatic locking method and system for the frequency of an optical frequency atomic clock.
Background
The optical frequency atomic clock adopts a transfer detection technology to detect clock transition spectral lines, and the whole experimental system needs two lasers: 423nm blue lasers and 657nm clock transition lasers. The system implementation process needs to complete three loop locks in sequence: the method comprises the following steps of locking a 423nm laser to an atomic transition spectral line, locking a 657nm laser to a PDH resonant cavity and locking a 657nm laser offset to an atomic resonance frequency. The index for evaluating the operation quality of the system is the closed loop stability of the system, and the index is directly related to the continuous locking duration of the system locking, so that the manual watching mode is adopted in the previous experiment, more manpower is consumed, and the experiment efficiency is reduced.
Disclosure of Invention
In order to solve at least one of the above problems, a first aspect of the present invention provides an optical frequency atomic clock frequency automatic locking method, including:
acquiring a first resonant laser and a second resonant laser;
adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
Further, the method for automatically locking the frequency of the optical frequency atomic clock further comprises the following steps:
determining a current frequency difference before and after the second resonant laser executes iterative operation, and generating a set switch parameter for controlling a relay circuit of an adjusting circuit according to the current frequency difference, so that when the relay circuit is in the set switch parameter, the adjusting circuit receives a transmission signal of the resonant cavity and outputs a preset voltage.
Further, the method for automatically locking the frequency of the optical frequency atomic clock further comprises the following steps:
and judging whether the interference patterns of the first resonant laser and the second resonant laser are correct or not.
Further, said adjusting the frequency of said first resonant laser to a first frequency range in which atomic transitions occur in a calcium atom flux comprises:
adjusting the voltage and the current of a laser corresponding to the first resonant laser so as to enable the first resonant laser wavelength to reach a target wavelength value;
calculating to obtain the peak value of the atomic resonance frequency according to the laser saturation spectrum signal;
locking the first resonant laser frequency to a peak of the atomic resonance frequency.
Further, the adjusting a laser corresponding to the second resonant laser, and transmitting the laser to a resonant cavity after frequency locking to stabilize the current frequency of the second resonant laser includes:
adjusting the rotation angle of a laser stepping motor corresponding to the second resonance laser by a set stepping value until the transmission signal amplitude value of the corresponding laser meets a first set condition, and suspending the rotation of the stepping motor;
adjusting the current of a laser corresponding to the second resonance laser by setting amplification, and recording the amplitude value of the corresponding transmission signal;
when the transmission signal amplitude value meets a second set condition, rotating the stepping motor;
when the transmission signal amplitude value meets a third set condition, recording the rotation angle of the stepping motor when the transmission signal amplitude value reaches the maximum, and suspending the rotation of the stepping motor;
and adjusting the rotation angle of the stepping motor to the rotation angle corresponding to the stepping motor when the transmission signal amplitude value is maximum, so as to complete the current frequency locking of the second resonant laser.
Further, the determining whether the interference patterns of the first resonant laser and the second resonant laser are correct includes:
acquiring data sequences of the first resonant laser and the second resonant laser interference pattern at the current moment;
selecting a data sequence within a set threshold range, and calculating to obtain a peak point in the data sequence;
calculating the difference value between the data sequence of the maximum value in the set threshold range and the data sequence of the peak point;
and if the difference is higher than a set value, judging that the interference patterns of the first resonant laser and the second resonant laser are correct.
The invention provides a second aspect of the automatic locking system of the frequency of the optical frequency atomic clock, comprising:
a laser acquisition module: acquiring a first resonant laser and a second resonant laser;
the first laser adjustment module: adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
the second laser adjusting module: and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
Further, the system for automatically locking the frequency of the optical frequency atomic clock further comprises:
laser offset adjustment module: determining a current frequency difference before and after the second resonant laser executes iterative operation, and generating a set switch parameter for controlling a relay circuit of an adjusting circuit according to the current frequency difference, so that when the relay circuit is in the set switch parameter, the adjusting circuit receives a transmission signal of the resonant cavity and outputs a preset voltage.
A third aspect of the present invention provides 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 step of automatically locking the frequency of the optical frequency atomic clock as described above when executing the computer program.
A fourth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of any of the above-described optical-frequency atomic clock frequency automatic locking methods.
The invention has the advantages of
The invention provides a method and a system for automatically locking the frequency of an optical frequency atomic clock, wherein the frequency of a first resonance laser is stabilized in a first frequency range in which atomic transition occurs in calcium atomic flow by adjusting corresponding laser parameters, and a second resonance laser is firstly subjected to frequency stabilization in a resonant cavity and then is locked from the offset of the second resonance laser to the atomic resonance frequency, so that the locking of two lasers can be controlled simultaneously, the manual input is reduced, and the human resources are saved; the man-made interference is reduced, and the man-made locking is avoided; the recovery speed is fast after the lock is lost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of an operation scheme of an optical frequency atomic clock frequency automatic locking method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, the optical frequency atomic clock experiment adopts a manual watching mode, consumes more manpower and reduces the experiment efficiency.
Based on the above, the invention provides an automatic locking method for the frequency of an optical frequency atomic clock, which comprises the following steps:
acquiring a first resonant laser and a second resonant laser;
adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
In some other embodiments, the method for automatically locking the frequency of an optical-frequency atomic clock further comprises:
determining a current frequency difference before and after the second resonant laser executes iterative operation, and generating a set switch parameter for controlling a relay circuit of an adjusting circuit according to the current frequency difference, so that when the relay circuit is in the set switch parameter, the adjusting circuit receives a transmission signal of the resonant cavity and outputs a preset voltage.
In some other embodiments, the method for automatically locking the frequency of an optical-frequency atomic clock further comprises:
and judging whether the interference patterns of the first resonant laser and the second resonant laser are correct or not.
In some other embodiments, said adjusting the frequency of said first resonant laser to a first frequency range in which atomic transitions occur in calcium atom flux comprises:
adjusting the voltage and the current of a laser corresponding to the first resonant laser so as to enable the first resonant laser wavelength to reach a target wavelength value;
calculating to obtain the peak value of the atomic resonance frequency according to the laser saturation spectrum signal;
locking the first resonant laser frequency to a peak of the atomic resonance frequency.
In some other embodiments, the adjusting the laser corresponding to the second resonant laser and transmitting the laser to a resonant cavity after frequency locking to stabilize the current frequency of the second resonant laser includes:
adjusting the rotation angle of a laser stepping motor corresponding to the second resonance laser by a set stepping value until the transmission signal amplitude value of the corresponding laser meets a first set condition, and suspending the rotation of the stepping motor;
adjusting the current of a laser corresponding to the second resonance laser by setting amplification, and recording the amplitude value of the corresponding transmission signal;
when the transmission signal amplitude value meets a second set condition, rotating the stepping motor;
when the transmission signal amplitude value meets a third set condition, recording the rotation angle of the stepping motor when the transmission signal amplitude value reaches the maximum, and suspending the rotation of the stepping motor;
and adjusting the rotation angle of the stepping motor to the rotation angle corresponding to the stepping motor when the transmission signal amplitude value is maximum, so as to complete the current frequency locking of the second resonant laser.
In some other embodiments, the determining whether the interference patterns of the first resonant laser and the second resonant laser are correct includes:
acquiring data sequences of the first resonant laser and the second resonant laser interference pattern at the current moment;
selecting a data sequence within a set threshold range, and calculating to obtain a peak point in the data sequence;
calculating the difference value between the data sequence of the maximum value in the set threshold range and the data sequence of the peak point;
and if the difference is higher than a set value, judging that the interference patterns of the first resonant laser and the second resonant laser are correct.
In another aspect, the present invention provides an automatic locking system for frequency of an optical frequency atomic clock, including:
a laser acquisition module: acquiring a first resonant laser and a second resonant laser;
the first laser adjustment module: adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
the second laser adjusting module: and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
In some other embodiments, the optical-frequency atomic clock frequency automatic locking system further comprises:
laser offset adjustment module: determining a current frequency difference before and after the second resonant laser executes iterative operation, and generating a set switch parameter for controlling a relay circuit of an adjusting circuit according to the current frequency difference, so that when the relay circuit is in the set switch parameter, the adjusting circuit receives a transmission signal of the resonant cavity and outputs a preset voltage.
It is understood that the first resonant laser is 423nm blue laser and the second resonant laser is 657nm clock transition laser. As shown in fig. 1, the calcium atomic optical clock system uses two sets of lasers, and 3 locking loops are used, which are respectively locking of 423nm laser frequency to atomic resonance frequency, locking of 657nm laser frequency to resonant cavity frequency, and locking of 657nm laser offset to atomic resonance frequency. The coordinated operation of these three locking loops is achieved according to the scheme of fig. 1: 423nm and 657nm laser start automatic locking, complete the locking of 657nm laser offset to atomic resonance frequency, monitor the locking state in real time, if the loop 1 loses the lock, close the locking switch of loop 1 and loop 3; if loop 2 is out of lock, the locked state of loop 2 and loop 3 is closed-locking is re-opened.
The following will specifically describe the operation steps of the automatic frequency locking system of the optical atomic clock with reference to specific embodiments.
Step 1: the system remotely collects the interference patterns of 423nm laser and 657nm laser and judges whether the interference patterns are correct interference patterns. Firstly, a system remotely captures a data sequence of an interference pattern at the current moment; secondly, the system screens out a data sequence between the maximum value and the second maximum value (left closed and right opened) which are larger than the set threshold A, and calculates the peak point (only one) in the data sequence; finally, the system calculates the distance B between the maximum and the peak point. If B is larger than the set value of the system, judging that the 423nm laser and the 657nm laser are in a correct interference image, otherwise, increasing the current by 0.01mA, and repeating the steps.
Step 2: the system remotely controls the stepping motor to rotate to gradually increase 657nm current gain, the system acquires the amplitude of a transmission signal in real time when the stepping motor rotates by 2 degrees, when the amplitude of the transmission signal gradually rises and 0.7V suddenly drops to be close to 0V, the rotation of the stepping motor is suspended, the current is gradually increased by 0.01mA until the amplitude of the transmission signal returns to 0.7V, the stepping motor is continuously rotated, the amplitude of the transmission signal is repeatedly observed, and the stepping motor is stopped rotating when the amplitude of the transmission signal slowly falls after rising to the maximum value; and finally, stepping and circling to the position of the maximum amplitude of the transmission signal, and completing 657nm laser locking by the system.
And step 3: on the basis of the step 2, the system remotely adjusts the voltage and the current of the 423nm laser, so that after the 423nm laser is in the target wavelength, the system remotely captures a saturation spectrum signal, calculates a peak value, and locks the 423nm laser to the point.
And 4, step 4: in a locking loop of 657nm laser offset to the atomic resonance frequency, the system replaces a manual switch with a three-way programmable relay, and after automatic locking of 423nm laser and 657nm laser is completed, the system remotely controls the programmable relay to realize automatic locking of the 657nm laser offset to the atomic resonance frequency.
And 5: and after the system finishes the locking of the three loops, the system enters a monitoring locking state mode, and if 423nm or 657nm laser is unlocked, the system closes locking switches of the three loops and automatically locks again. The system monitors the amplitude of the transmission signal in real time, and the unlocking is judged when the amplitude is lower than 200 mV; and after the system monitors that the lock is lost, the system immediately exits the locking mode and enters a secondary locking mode.
In order to solve the problems that the existing optical frequency atomic clock experiment adopts a manual watching mode, consumes more manpower and reduces the experiment efficiency, the application provides an embodiment of electronic equipment for realizing all or part of contents in an automatic locking method of the optical frequency atomic clock frequency, and the electronic equipment specifically comprises the following contents:
fig. 2 is a schematic block diagram of a system configuration of an electronic device 9600 according to an embodiment of the present application. As shown in fig. 2, the electronic device 9600 can include a central processor 9100 and a memory 9140; the memory 9140 is coupled to the central processor 9100. Notably, this FIG. 2 is exemplary; other types of structures may also be used in addition to or in place of the structure to implement telecommunications or other functions.
In one embodiment, the frequency auto-lock function may be integrated into the central processor. Wherein the central processor may be configured to control:
acquiring a first resonant laser and a second resonant laser;
adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
From the above description, it can be seen that the present invention provides an electronic device, wherein the frequency of a first resonant laser is stabilized in a first frequency range where atomic transition occurs in calcium atomic current by adjusting corresponding laser parameters, and a second resonant laser performs frequency stabilization in a resonant cavity and then performs locking of a second resonant laser offset to an atomic resonant frequency, so that locking of two lasers can be controlled simultaneously, manual investment is reduced, and human resources are saved; the man-made interference is reduced, and the man-made locking is avoided; the recovery speed is fast after the lock is lost.
In another embodiment, the optical frequency atomic clock frequency automatic locking system may be configured separately from the central processor 9100, for example, the optical frequency atomic clock frequency automatic locking system may be configured as a chip connected to the central processor 9100, and the frequency automatic locking function is realized by the control of the central processor.
As shown in fig. 2, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is noted that the electronic device 9600 also does not necessarily include all of the components shown in fig. 2; further, the electronic device 9600 may further include components not shown in fig. 2, which may be referred to in the art.
As shown in fig. 2, a central processor 9100, sometimes referred to as a controller or operational control, can include a microprocessor or other processor device and/or logic device, which central processor 9100 receives input and controls the operation of the various components of the electronic device 9600.
The memory 9140 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The information relating to the failure may be stored, and a program for executing the information may be stored. And the central processing unit 9100 can execute the program stored in the memory 9140 to realize information storage or processing, or the like.
The input unit 9120 provides input to the central processor 9100. The input unit 9120 is, for example, a key or a touch input device. Power supply 9170 is used to provide power to electronic device 9600. The display 9160 is used for displaying display objects such as images and characters. The display may be, for example, an LCD display, but is not limited thereto.
The memory 9140 can be a solid state memory, e.g., Read Only Memory (ROM), Random Access Memory (RAM), a SIM card, or the like. There may also be a memory that holds information even when power is off, can be selectively erased, and is provided with more data, an example of which is sometimes called an EPROM or the like. The memory 9140 could also be some other type of device. Memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application/function storage portion 9142, the application/function storage portion 9142 being used for storing application programs and function programs or for executing a flow of operations of the electronic device 9600 by the central processor 9100.
The memory 9140 can also include a data store 9143, the data store 9143 being used to store data, such as contacts, digital data, pictures, sounds, and/or any other data used by an electronic device. The driver storage portion 9144 of the memory 9140 may include various drivers for the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging applications, contact book applications, etc.).
The communication module 9110 is a transmitter/receiver 9110 that transmits and receives signals via an antenna 9111. The communication module (transmitter/receiver) 9110 is coupled to the central processor 9100 to provide input signals and receive output signals, which may be the same as in the case of a conventional mobile communication terminal.
Based on different communication technologies, a plurality of communication modules 9110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, may be provided in the same electronic device. The communication module (transmitter/receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and receive audio input from the microphone 9132, thereby implementing ordinary telecommunications functions. The audio processor 9130 may include any suitable buffers, decoders, amplifiers and so forth. In addition, the audio processor 9130 is also coupled to the central processor 9100, thereby enabling recording locally through the microphone 9132 and enabling locally stored sounds to be played through the speaker 9131.
Embodiments of the present application further provide a computer-readable storage medium capable of implementing all the steps in the optical frequency atomic clock frequency automatic locking method in the foregoing embodiments, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the computer program implements all the steps of the optical frequency atomic clock frequency automatic locking method in the foregoing embodiments, where the execution subject of the computer program is a server or a client, for example, the processor implements the following steps when executing the computer program:
acquiring a first resonant laser and a second resonant laser;
adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
From the above description, it can be seen that the present invention provides a computer readable medium, wherein the frequency of a first resonant laser is stabilized in a first frequency range where atomic transition occurs in calcium atomic current by adjusting corresponding laser parameters, and a second resonant laser performs frequency stabilization in a resonant cavity and then performs locking of a second resonant laser offset to an atomic resonant frequency, so that locking of two lasers can be controlled simultaneously, manual investment is reduced, and human resources are saved; the man-made interference is reduced, and the man-made locking is avoided; the recovery speed is fast after the lock is lost.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An automatic locking method for the frequency of an optical frequency atomic clock is characterized by comprising the following steps:
acquiring a first resonant laser and a second resonant laser;
adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
2. The method for automatic frequency locking of an optical-frequency atomic clock according to claim 1, further comprising:
determining a current frequency difference before and after the second resonant laser executes iterative operation, and generating a set switch parameter for controlling a relay circuit of an adjusting circuit according to the current frequency difference, so that when the relay circuit is in the set switch parameter, the adjusting circuit receives a transmission signal of the resonant cavity and outputs a preset voltage.
3. The method for automatic frequency locking of an optical-frequency atomic clock according to claim 1, further comprising:
and judging whether the interference patterns of the first resonant laser and the second resonant laser are correct or not.
4. The method for automatic frequency locking of an optical frequency atomic clock as claimed in claim 1, wherein said adjusting the frequency of said first resonant laser to a first frequency range in which atomic transitions occur in the flux of calcium atoms comprises:
adjusting the voltage and the current of a laser corresponding to the first resonant laser so as to enable the first resonant laser wavelength to reach a target wavelength value;
calculating to obtain the peak value of the atomic resonance frequency according to the laser saturation spectrum signal;
locking the first resonant laser frequency to a peak of the atomic resonance frequency.
5. The method as claimed in claim 1, wherein the adjusting the laser corresponding to the second resonant laser and the frequency-locking the laser before transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonant laser comprises:
adjusting the rotation angle of a laser stepping motor corresponding to the second resonance laser by a set stepping value until the transmission signal amplitude value of the corresponding laser meets a first set condition, and suspending the rotation of the stepping motor;
adjusting the current of a laser corresponding to the second resonance laser by setting amplification, and recording the amplitude value of the corresponding transmission signal;
when the transmission signal amplitude value meets a second set condition, rotating the stepping motor;
when the transmission signal amplitude value meets a third set condition, recording the rotation angle of the stepping motor when the transmission signal amplitude value reaches the maximum, and suspending the rotation of the stepping motor;
and adjusting the rotation angle of the stepping motor to the rotation angle corresponding to the stepping motor when the transmission signal amplitude value is maximum, so as to complete the current frequency locking of the second resonant laser.
6. The method as claimed in claim 3, wherein the determining whether the interference patterns of the first resonant laser and the second resonant laser are correct comprises:
acquiring data sequences of the first resonant laser and the second resonant laser interference pattern at the current moment;
selecting a data sequence within a set threshold range, and calculating to obtain a peak point in the data sequence;
calculating the difference value between the data sequence of the maximum value in the set threshold range and the data sequence of the peak point;
and if the difference is higher than a set value, judging that the interference patterns of the first resonant laser and the second resonant laser are correct.
7. An automatic frequency locking system for an optical frequency atomic clock, comprising:
a laser acquisition module: acquiring a first resonant laser and a second resonant laser;
the first laser adjustment module: adjusting the frequency of the first resonant laser to a first frequency range in which atomic transition occurs in the calcium atomic flow;
the second laser adjusting module: and executing iteration operation, judging whether the current frequency of the second resonance laser is in a second frequency range of atomic transition generation of calcium atomic flow, if not, adjusting a laser corresponding to the second resonance laser, locking the frequency, and transmitting the laser to a resonant cavity to stabilize the current frequency of the second resonance laser, and repeating whether the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow until the current frequency of the second resonance laser is in the second frequency range of atomic transition generation of calcium atomic flow.
8. The optical-frequency atomic clock frequency automatic locking system according to claim 7, further comprising:
laser offset adjustment module: determining a current frequency difference before and after the second resonant laser executes iterative operation, and generating a set switch parameter for controlling a relay circuit of an adjusting circuit according to the current frequency difference, so that when the relay circuit is in the set switch parameter, the adjusting circuit receives a transmission signal of the resonant cavity and outputs a preset voltage.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method for automatically locking the frequency of an optical frequency atomic clock according to any one of claims 1 to 6 are implemented when the computer program is executed by the processor.
10. A computer-readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the steps of the method for automatic frequency locking of an optical-frequency atomic clock according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111502002.7A CN114415487B (en) | 2021-12-09 | 2021-12-09 | Automatic locking method and system for optical frequency atomic clock frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111502002.7A CN114415487B (en) | 2021-12-09 | 2021-12-09 | Automatic locking method and system for optical frequency atomic clock frequency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114415487A true CN114415487A (en) | 2022-04-29 |
| CN114415487B CN114415487B (en) | 2023-12-05 |
Family
ID=81266494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111502002.7A Active CN114415487B (en) | 2021-12-09 | 2021-12-09 | Automatic locking method and system for optical frequency atomic clock frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114415487B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63189020A (en) * | 1987-02-02 | 1988-08-04 | Nippon Telegr & Teleph Corp <Ntt> | Laser excitation type cesium atomic oscillator using optical frequency shifter |
| JP2003106978A (en) * | 2001-09-28 | 2003-04-09 | Jasco Corp | Optical radiation pressure measuring device |
| CN1786853A (en) * | 2005-12-27 | 2006-06-14 | 北京大学 | Method and equipment for enhancing performance of mini atom beam optical frequency atomic clock |
| CN103712689A (en) * | 2014-01-02 | 2014-04-09 | 上海朗研光电科技有限公司 | Continuous laser device spectral line width measurement device based on optical frequency comb |
| CN104317185A (en) * | 2014-11-21 | 2015-01-28 | 中国科学院武汉物理与数学研究所 | Method and device for obtaining Ramsey-CPT spectrum |
| CN110515291A (en) * | 2019-09-02 | 2019-11-29 | 温州激光与光电子协同创新中心 | The atomic beam light clock and its implementation of pulse wide range clock laser acquisition |
| CN110783814A (en) * | 2019-10-28 | 2020-02-11 | 温州激光与光电子协同创新中心 | Small calcium atomic beam optical clock for modulation transfer detection between different wavelengths and preparation method thereof |
-
2021
- 2021-12-09 CN CN202111502002.7A patent/CN114415487B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63189020A (en) * | 1987-02-02 | 1988-08-04 | Nippon Telegr & Teleph Corp <Ntt> | Laser excitation type cesium atomic oscillator using optical frequency shifter |
| JP2003106978A (en) * | 2001-09-28 | 2003-04-09 | Jasco Corp | Optical radiation pressure measuring device |
| CN1786853A (en) * | 2005-12-27 | 2006-06-14 | 北京大学 | Method and equipment for enhancing performance of mini atom beam optical frequency atomic clock |
| US20090180357A1 (en) * | 2005-12-27 | 2009-07-16 | Jing-Biao Chen | Atomic beam optical frequency atomic clock and a producing method thereof |
| CN103712689A (en) * | 2014-01-02 | 2014-04-09 | 上海朗研光电科技有限公司 | Continuous laser device spectral line width measurement device based on optical frequency comb |
| CN104317185A (en) * | 2014-11-21 | 2015-01-28 | 中国科学院武汉物理与数学研究所 | Method and device for obtaining Ramsey-CPT spectrum |
| CN110515291A (en) * | 2019-09-02 | 2019-11-29 | 温州激光与光电子协同创新中心 | The atomic beam light clock and its implementation of pulse wide range clock laser acquisition |
| CN110783814A (en) * | 2019-10-28 | 2020-02-11 | 温州激光与光电子协同创新中心 | Small calcium atomic beam optical clock for modulation transfer detection between different wavelengths and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 叶安培;: "量子频标中的原子物理", 原子与分子物理学报, no. 02 * |
| 林弋戈;方占军;: "锶原子光晶格钟", 物理学报, no. 16 * |
| 边武: "10-17 量级钙离子光频标的实验研究", 中国博士学位论文全文数据库, pages 40 - 70 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114415487B (en) | 2023-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106507013B (en) | Control method, device and the display terminal of VBO signal transmission | |
| US7729621B2 (en) | Controlling a bias voltage for a Mach-Zehnder modulator | |
| KR101250162B1 (en) | System and method of calibrating power-on gating window for a time-to-digital converter (tdc) of a digital phase locked loop (dpll) | |
| EP3276986B1 (en) | Method of contactless communication between an objet, for example a card emulated mobile phone, and a reader by active load modulation | |
| CN104363638B (en) | router signal intensity adjusting method and device | |
| CN105389566A (en) | Fingerprint identification method, fingerprint template updating method, fingerprint template updating device and mobile terminal | |
| CN105264334A (en) | Duty-cycled gyroscope | |
| CN112069154B (en) | etcd distributed database automatic operation and maintenance method and related device | |
| CN112187377A (en) | Antenna frequency modulation system, frequency modulation method, device and medium | |
| CN101989863B (en) | Rapid frequency deviation tracking device and method | |
| CN114415487A (en) | Automatic locking method and system for frequency of optical frequency atomic clock | |
| KR101652910B1 (en) | Integrated processor and cdr circuit | |
| CN107547085A (en) | Scaled for the bias voltage based on frequency of phaselocked loop | |
| CN111327375B (en) | Channel scanning method, communication terminal and storage medium | |
| CN108271088B (en) | CDR bandwidth adjusting method and device of optical module | |
| CN114447749A (en) | Automatic locking method and system for laser frequency | |
| CN105427875A (en) | Control method and device for playlist, intelligent speaker and mobile terminal | |
| CN115395534A (en) | Frequency droop control method and device for photovoltaic inverter | |
| CN110940884B (en) | Converter valve short-circuit current automatic test method and device and control protection equipment | |
| US11875217B2 (en) | Information processing apparatus, information processing terminal apparatus, and information processing method | |
| Mariño et al. | Coupling scheme for complete synchronization of periodically forced chaotic C O 2 lasers | |
| CN112379450A (en) | Signal-to-noise ratio obtaining method and device for time-frequency electromagnetic square wave signal | |
| CN107659282B (en) | Radio frequency voltage limiting method and device | |
| JP3334063B2 (en) | Frequency offset estimation method and apparatus therefor | |
| CN115860022B (en) | Method and system for reducing standby power consumption of NFC read-write chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |