CN107302180A - Automatic decision simultaneously sets laser frequency and the control system and its control method of power - Google Patents
Automatic decision simultaneously sets laser frequency and the control system and its control method of power Download PDFInfo
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- CN107302180A CN107302180A CN201710442622.3A CN201710442622A CN107302180A CN 107302180 A CN107302180 A CN 107302180A CN 201710442622 A CN201710442622 A CN 201710442622A CN 107302180 A CN107302180 A CN 107302180A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
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Abstract
The invention discloses a kind of automatic decision and set laser frequency and the control system and its control method of power.The present invention uses twin-laser structure, and main control unit can search for the output frequency of simultaneously automatic decision main laser automatically according to spectral signal, after power output to the target power of Automatic Optimal main laser, frequency is automatically become locked on atom or molecular spectrum；Beat signal is produced after closing beam from the output of laser and main laser, main control unit is capable of the magnitude relationship of automatic decision main laser and the output frequency from laser, so that output frequency of the accurate and automatic decision from laser, after Automatic Optimal is from the power output of laser to target power, frequency locking error signal is generated using main control unit, is realized in the range of 80GHz to the locking from laser frequency；The method of the present invention can be widely used in laser cooling, atomic frequency standard, the basic research such as atomic interferometer and laser wavelength meter and Technology of Precision Measurement field.
Description
Technical field
The invention belongs to photoelectron technical field, and in particular to a kind of automatic decision and the control for setting laser frequency and power
System and its control method processed.
Background technology
In the device of the related precision measurement equipment of Frequency Stabilized Lasers and application high freuqency accuracy laser, it usually needs
It is interior in a big way to tune and lock the output frequency of laser.The relatively macrorelief of the aging of laser, parameter drift or working environment
Laser frequency drift can be caused to go out system lock scope, so as to cause the failure of equipment or index to decline, if laser has
There is the function of automatic decision and automatic setpoint frequency, the mean free error time will be substantially increased the index of equipment.
Generally, in frequency stabilized carbon dioxide laser or apply in the device of high freuqency accuracy laser, it is necessary in larger model
Enclose interior tuning and lock laser frequency.Conventional method is first to be controlled laser temperature in certain fixation using control temperature unit
Within the scope of (by taking semiconductor laser as an example, the uncertainty general control of temperature is in milli Kelvin/1 hour, correspondence laser frequency
The uncertainty of rate is 20MHz magnitudes), the Injection Current of laser is then adjusted again so that laser frequency and certain sample are (for example
Atomic air chamber, molecule air chamber or optical resonator etc.) resonance, detect and handle the spectral signal acquisition error letter that resonance is produced
Number, error signal control laser frequency (electric current of controllable laser, resonant cavity length or laser temperature) is recycled, realizes and swashs
The locking (uncertainty of laser frequency can be generally controlled after locking in 1MHz magnitudes) of light frequency.
Made reference using atom or molecular spectrum, laser frequency can only be locked on the discrete frequency values of several fixations,
If required laser frequency and the resonant frequency of spectral line are inconsistent, external modulation device (such as acousto-optic of complexity is needed to use
Modulation, or Electro-optical Modulation etc.) adjust by laser frequency, and external modulation device not necessarily being capable of seamless coverage atom or molecule
All frequencies between spectral resonance frequency.Made reference using optical resonator, if the optical path difference between resonator mirror is constant,
Laser frequency can only be also locked on the discrete frequency values of several fixations；If cavity length can be tuned, then adjust
Humorous precision can directly affect the precision of output laser frequency.In addition, the length of resonator is highly susceptible to environment various factors
Interference (such as variation of ambient temperature, humidity change, mechanical oscillation etc.), these interference can cause the resonant frequency of chamber to occur
Drift, so as to influence the output frequency of laser.
Aging can cause laser under the conditions of preliminary set time, when reaching the output frequency that system needs, output light
Power drop, the measurement signal intensity of generation declines, even failed so that whole device index declines；Laser parameter becomes
When change or environmental condition are had compared with macrorelief, laser can not be by adjusting Injection Current by laser frequency under original design temperature
Desired value is arrived in rate regulation, or laser temperature may not be locked into original setting value, and such equipment can not normal work.
The content of the invention
In order to solve above-mentioned problems of the prior art, the present invention proposes a kind of automatic decision and sets laser frequency
The control system and its control method of rate and power, can be on the premise of laser fail in itself, and automatic decision is simultaneously locked
Laser frequency is determined to desired value.
It is an object of the present invention to propose a kind of automatic decision and set laser frequency and the control system of power.
The automatic decision of the present invention simultaneously sets the control system of laser frequency and power and included：Main laser, from laser,
First control temperature unit, the second control temperature unit, the first current unit, the second current unit, the first power detector, the second power are visited
Survey device, it is saturation-absorption spectrum unit, frequency stabilization unit, high-speed photodetector, frequency divider, the first high reflection light splitting piece, second high
It is reflection beam splitting piece, highly transmissive light splitting piece, the 1/1st wave plate, the 1/2nd wave plate, quarter-wave plate, first inclined
Shake beam splitter prism, the second polarization beam splitter prism and programmable logic device (CPLD)；Wherein, PLD is by temperature and electricity
The parameter of stream is transmitted to the first control temperature unit and the first current unit, controls the output frequency and power output of main laser；It is main
The output light of laser is after the 1/1st wave plate and the first polarization beam splitter prism, and the light of fraction power enters saturation
Absorption spectrum unit, absorption spectrum unit transmits saturation-absorption spectrum signal to PLD；Programmable logic device
Part obtains the output frequency of main laser according to saturation-absorption spectrum signal；The light of most of power passes through the first high reflection light splitting
Piece；The transmitted light of first high reflection light splitting piece enters the first power detector；First power detector is connected to FPGA
Device, measurement obtains the power output of main laser；The reflected light of first high reflection light splitting piece enters the second high reflection light splitting piece,
Reflected light as main laser the first output light, transmitted light enter the second polarization beam splitter prism；PLD is connected
To frequency stabilization unit, frequency stabilization unit is connected to the first current unit, when the power output and output frequency of main laser are target work(
When rate and target frequency, PLD starts frequency stabilization unit；PLD passes temperature and the parameter of electric current
The second control temperature unit and the second current unit are transported to, output frequency and power output from laser is controlled；From the defeated of laser
Light extraction passes through highly transmissive light splitting piece；The reflected light of highly transmissive light splitting piece enters the second power detector；Second power detector connects
PLD is connected to, measurement obtains the power output from laser；The transmitted light of highly transmissive light splitting piece passes through the two or two
After/mono- wave plate and the second polarization beam splitter prism, the light transmission of most of power is used as the second output light from laser；Through
With the main laser that is transmitted through the second high reflection light splitting piece after the light reflection of fraction power after second polarization beam splitter prism
Swash combiner, high-speed photodetector is entered after quarter-wave plate, produce beat signal；Beat signal is by frequency dividing
Device, output frequency is converted to incoming frequency 1/N, inputs to PLD, N is frequency dividing ratio, and N is natural number.
Programmable logic device (CPLD) passes through programming realization main laser parameter setting unit, main laser spectrum record
Member, main laser power trace unit, from laser parameter setup unit, from laser power record unit, beat signal frequency
Rate measuring unit and main control unit；Wherein, main laser parameter setting unit, main laser spectrum recording unit, main laser
Power trace unit, from laser parameter setup unit, from laser power note down unit and beat signal frequency measuring unit
It is respectively connecting to main control unit；First control temperature unit, the first current unit and frequency stabilization unit connect main laser parameter and set respectively
Order member, main control unit sets the running parameter of main laser by main laser parameter setting unit；Saturation-absorption spectrum list
Member is connected to main laser spectrum recording unit, and main laser spectrum recording unit is led by analyzing saturation-absorption spectrum
The output frequency of laser；First power detector is connected to main laser power trace unit, obtains the output of main laser
Power；Second control temperature unit and the second current unit are connected from laser parameter setup unit respectively, and main control unit is by from swashing
Light device parameter setting unit sets the running parameter from laser；Second power detector is connected to from laser power and notes down single
Member, obtains the power output from laser；Frequency divider is connected to beat signal frequency measuring unit, the output letter of measurement frequency divider
Number frequency.
First power detector and the second power detector use photodiode.
High-speed photodetector uses indium gallium arsenic detector.
It is another object of the present invention to provide a kind of automatic decision and set laser frequency and the control method of power.
The automatic decision of the present invention simultaneously sets laser frequency and the control method of power, comprises the following steps：
1) measurement obtains temperature to the regulation rate and electric current of the output frequency of main laser to the defeated of main laser in advance
Go out the regulation rate of frequency, and measurement temperature to the regulation rate and electric current of the output frequency from laser to from the defeated of laser
Go out the regulation rate of frequency, obtained known parameters will be measured above and are stored in main control unit；And in main control unit in advance
Store the target frequency and target power and the target frequency and target power from laser of main laser；
2) desired temperature and current setting value of setting scanning main laser, and setting scan the temperature from laser
Setting value and current setting value, for the frequency of automatic decision and setting main laser, main control unit is with certain frequency interval pair
The desired temperature for a series of scanning main laser of temperature step size settings answered, on each desired temperature, master control list
Member is with the current setting value of the smaller corresponding a series of scanning main laser of current steps setting of frequency interval；
3) the first job point of main laser is obtained：Main control unit controls first by main laser parameter setting unit
Control temperature unit, main control unit produces a series of desired temperature of main lasers, swashs since minimum desired temperature to main
Light device carries out temperature scanning, and controls the first current unit on each desired temperature with smaller interval scan main laser
The current setting value of device, while main laser spectrum recording unit records the saturated absorption light of the main laser after digitlization in real time
Spectrum signal, main control unit judges that whether occurring laser and the saturation-absorption spectrum of atomic resonance in the spectral signal recorded believes
Number, the ratio in judgement for occurring transmission peaks and the corresponding electric current spacing of transmission peaks in main control unit is by spectral signal goes out spectrum letter
Occur saturation-absorption spectrum signal in number and judge after the output frequency of the corresponding main laser of transmission peaks, find and target frequency
The equal output frequency of rate, main control unit record the output frequency of main laser for the corresponding desired temperature of target frequency,
The power output of current setting value and now main laser, so as to obtain the first job point of main laser；
4) main control unit compares under the conditions of the first job point of main laser, and the output frequency of main laser is target frequency
During rate, the target power of the default main laser stored in the power output and main control unit of main laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, with first job point
Parameter be main laser parameter, main control unit by main laser parameter setting unit start frequency stabilization unit, by the defeated of main laser
Go out Frequency Locking at the corresponding spectral signal peak value of target frequency, that is, be locked on the resonance point of spectrum, complete main laser
Frequency and power automatic decision and setting, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, into step 5)；
5) second operating point of main laser is obtained：If the power output of main laser is less than target power, increase
Plus the current setting value of main laser；If the power output of main laser is more than target power, reduce the electricity of main laser
Setting value is flowed, then according to regulation rate and electric current pair of the temperature prestored in main control unit to the output frequency of main laser
The regulation rate of the output frequency of main laser is calculated, and obtains causing the temperature value that the output frequency of main laser is constant；Master control list
The temperature of main laser is set as the temperature value that calculating above is obtained by member, and the electric current of main laser is scanned again, and search is full
With absorption spectrum signal, main control unit judges the output frequency of the corresponding main laser of spectral signal, and main control unit is recorded
The output frequency of main laser is the corresponding desired temperature of target frequency, current setting value and the now output of main laser
Power, so as to obtain second operating point of main laser；
6) main control unit compares under the conditions of second operating point of main laser, and the output frequency of main laser is target
During frequency, the target power of the default main laser stored in the power output and main control unit of main laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, with second operating point
Parameter be main laser parameter, main control unit by main laser parameter setting unit start frequency stabilization unit, by the defeated of main laser
Go out Frequency Locking at the corresponding spectral signal peak value of target frequency, that is, be locked on the resonance point of spectrum, complete main laser
Frequency and power automatic decision and setting, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, into step 7)；
7) the m-th operating point of main laser is obtained, M initial values are the natural number that 3, M is >=3, and main control unit is according to
(M-1) when the output frequency of main laser is target frequency under individual operating point and (M-2) individual operating point, corresponding temperature setting
Value, current setting value and power output, the output frequency that calculating obtains main laser is target frequency and power is target work(
During rate, the temperature of main laser is set as that above-mentioned calculating is obtained by corresponding desired temperature and current setting value, main control unit
Desired temperature, then keeping temperature setting value is constant, is swept in the continuous tuning coverage of the electric current of the not mode hopping of main laser
Electric current is retouched, main control unit judges the output frequency of main laser according to the spectral signal of record, and main control unit records main laser
The output frequency of device is the corresponding desired temperature of target frequency, current setting value and the now power output of main laser,
So as to obtain the m-th operating point of main laser；
8) main control unit compares under the conditions of the m-th operating point of main laser, and the output frequency of main laser is target
During frequency, the target power of the default main laser stored in the power output and main control unit of main laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, with m-th operating point
Parameter be main laser parameter, main control unit by main laser parameter setting unit start frequency stabilization unit, by the defeated of main laser
Go out Frequency Locking at the corresponding spectral signal peak value of target frequency, that is, be locked on the resonance point of spectrum, complete main laser
Frequency and power automatic decision and setting, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, M=M+1, return to step
7)；
9) the first job point from laser is obtained：Main control unit from laser parameter setup unit by controlling second
Control temperature unit, will be set on a series of desired temperature from laser from the temperature of laser, and in each temperature
Control the second current unit with smaller interval scan from the current setting value of laser in setting value, while main control unit is controlled
The frequency of the output signal of beat signal frequency measuring unit measurement frequency divider, until the frequency measurement of non-zero is observed, and
Obtain the output frequency from laser, main control unit record from the output frequency of laser be target frequency when temperature setting
Value, current setting value and power output, obtain the first job point from laser；
10) main control unit compares under the conditions of the first job of laser point, is mesh from the output frequency of laser
When marking frequency, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, into step 11)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation
Frequency locking error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The frequency of device and the automatic decision of power and setting；
11) obtain from second operating point of laser：If being less than target power from the power output of laser, increase
Plus from the current setting value of laser；If being more than target power from the power output of laser, reduce the electricity from laser
Setting value is flowed, then according to regulation rate and electric current pair of the temperature prestored in main control unit to the output frequency from laser
Calculated from the regulation rate of the output frequency of laser, obtain causing from the constant temperature value of the output frequency of laser；Master control list
Member will be set as the temperature value that calculating above is obtained from the temperature of laser, and the electric current from laser is scanned again, until seeing
The frequency measurement of non-zero is observed, while main control unit control beat signal frequency measuring unit measures the output signal of frequency divider
Frequency, and obtain the output frequency from laser, main control unit record from the output frequency of laser be target frequency when
Desired temperature, current setting value and power output, are obtained from second operating point of laser；
12) main control unit compares under the conditions of second operating point from laser, is mesh from the output frequency of laser
When marking frequency, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, into step 13)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation
Frequency locking error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The frequency of device and the automatic decision of power and setting；
13) obtain from the m-th operating point of laser, M initial values are the natural number that 3, M is >=3, and main control unit is according to
(M-1) when being target frequency from the output frequency of laser under individual operating point and (M-2) individual operating point, corresponding temperature setting
Value, current setting value and power output, it is target frequency from the output frequency of laser that calculating, which is obtained, and power is target work(
During rate, corresponding desired temperature and current setting value, main control unit will be set as that above-mentioned calculating is obtained from the temperature of laser
Desired temperature, then keeping temperature setting value is constant, is calculating sweep current near obtained current setting value, until seeing
The frequency measurement of non-zero is observed, while main control unit control beat signal frequency measuring unit measures the output signal of frequency divider
Frequency, and obtain the output frequency from laser, main control unit record from the output frequency of laser be target frequency when
Desired temperature, current setting value and power output, are obtained from the m-th operating point of laser；
14) main control unit compares under the conditions of the m-th operating point from laser, is target from the output frequency of laser
During frequency, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, M=M+1, return to step
13)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation
Frequency locking error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The frequency of device and the automatic decision of power and setting.
Wherein, in step 3) in, the output frequency of the corresponding main laser in interval of the adjacent desired temperature of each two
Continuous tuning coverage of the interval less than the electric current of the not mode hopping of main laser.
In step 9) in, the output frequency from laser is obtained, is comprised the following steps：When beat signal frequency measuring unit
When measuring the frequency of non-zero, the frequency of main laser is ν, and main laser and the beat frequency rate from laser are f, can not be true
The fixed output frequency from laser, now has two possible values from the frequency of laser:ν+f and ν-f；Due to electric current to from
The regulation rate of the output frequency of laser is known, so after beat signal is measured, main control unit is adjusted from laser
Electric current, from the rise of the output frequency of laser, the frequency of beat signal then to be measured again, if the frequency of beat signal
Rate is raised, then from the frequency of laser be ν+f, if the frequency reduction of beat signal, then from the frequency of laser for ν-
f。
Advantages of the present invention：
The present invention uses twin-laser structure, and main control unit can automatically be searched for according to spectral signal and automatic decision master swashs
The output frequency of light device, after power output to the target power of Automatic Optimal main laser, atom is automatically become locked to by frequency
Or on molecular spectrum；Beat signal is produced after closing beam from the output of laser and main laser, main control unit being capable of automatic decision
The magnitude relationship of main laser and output frequency from laser, so that output frequency of the accurate and automatic decision from laser,
After Automatic Optimal is from the power output of laser to target power, frequency locking error signal is generated using main control unit, in 80GHz
In the range of realize to the locking from laser frequency；The method of the present invention can be widely used in laser cooling, atomic frequency standard, former
The basic research such as sub- interferometer and laser wavelength meter and Technology of Precision Measurement field.
Brief description of the drawings
Fig. 1 is the automatic decision of the present invention and sets the structure chart of laser frequency and the control system of power.
Embodiment
Below in conjunction with the accompanying drawings, by specific embodiment, the present invention is expanded on further.
As shown in figure 1, the automatic decision of the present embodiment and setting the control system of laser frequency and power and including：Main laser
Device, from laser, the first control temperature unit, the second control temperature unit, the first current unit, the second current unit, the first power detection
Device, the second power detector, saturation-absorption spectrum unit, frequency stabilization unit, high-speed photodetector, frequency divider, the first high reflection
Light splitting piece, the second high reflection light splitting piece, highly transmissive light splitting piece, the 1/1st wave plate, the 1/2nd wave plate, four/
One wave plate, the first polarization beam splitter prism, the second polarization beam splitter prism and programmable logic device (CPLD)；Wherein, FPGA
Device CPLD is remembered by programming realization main laser parameter setting unit, main laser spectrum recording unit, main laser power
Record unit, note down unit, beat signal frequency measuring unit and master control list from laser parameter setup unit, from laser power
Member；Main laser parameter setting unit, main laser spectrum recording unit, main laser power trace unit, from laser ginseng
Count setup unit, be respectively connecting to main control unit from laser power record unit and beat signal frequency measuring unit；First
Control temperature unit, the first current unit and frequency stabilization unit connect main laser parameter setting unit respectively, and main control unit is swashed by main
Light device parameter setting unit sets the running parameter of main laser；Saturation-absorption spectrum unit is connected to main laser spectrum record
Unit, main laser spectrum recording unit obtains the output frequency of main laser by analyzing saturation-absorption spectrum；First power
Detector is connected to main laser power trace unit, obtains the power output of main laser；Second control temperature unit and the second electricity
Stream unit is connected from laser parameter setup unit respectively, and main control unit from laser parameter setup unit by setting from laser
The running parameter of device；Second power detector is connected to from laser power and notes down unit, obtains the power output from laser；
Frequency divider is connected to beat signal frequency measuring unit, measures the frequency of the output signal of frequency divider；PLD
Main control unit is transmitted the parameter of temperature and electric current to the first control temperature unit and the first electricity by main laser parameter setting unit
Unit is flowed, the output frequency and power output of main laser is controlled；The output light of main laser passes through the 1/1st wave plate
After the first polarization beam splitter prism, the light of 5% power enters saturation-absorption spectrum unit, and absorption spectrum unit is by saturated absorption light
Spectrum signal is transmitted to the main laser spectrum recording unit of PLD；The main control unit of PLD according to
Saturation-absorption spectrum signal obtains the output frequency of main laser；The light of 95% power passes through the first high reflection light splitting piece；First
The light transmission of high reflection light splitting piece 5% enters the first power detector；First power detector is connected to PLD
Main laser power trace unit, measurement obtains the power output of main laser；The light of first high reflection light splitting piece 95% is anti-
Inject into the second high reflection light splitting piece, the light of the second high reflection light splitting piece 95% reflects the first output light as main laser,
5% light transmission enters the second polarization beam splitter prism；The main laser parameter setting unit of PLD is connected to surely
Frequency unit, frequency stabilization unit is connected to the first current unit, when main laser power output and output frequency for target power and
During target frequency, PLD starts frequency stabilization unit；The main control unit of PLD from laser by joining
Number setup unit transmits the parameter of temperature and electric current to the second control temperature unit and the second current unit, controls from the defeated of laser
Go out frequency and power output；Pass through highly transmissive light splitting piece from the output light of laser；The light of highly transmissive light splitting piece 5% is reflected into
Second power detector；Second power detector be connected to PLD from laser power note down unit, measurement
Obtain the power output from laser；The 1/2nd wave plate and second that is transmitted through of the highly transmissive light of light splitting piece 95% is polarized
After beam splitter prism, the light transmission of 95% power is used as the second output light from laser；Through 5% after the second polarization beam splitter prism
With the sharp combiner of the main laser transmitted through the second high reflection light splitting piece after the light reflection of power, after quarter-wave plate
Into high-speed photodetector, using indium gallium arsenic detector, a width of 40GHz of measurement frequency band produces beat signal；Beat signal
By frequency divider, output frequency is converted to incoming frequency 1/N, inputs to the beat signal frequency of PLD and measures single
Member.
The automatic decision of the present embodiment simultaneously sets laser frequency and the control method of power, comprises the following steps：
1) measurement obtains temperature to the regulation rate and electric current of the output frequency of main laser to the defeated of main laser in advance
Go out the regulation rate of frequency, and measurement temperature to the regulation rate and electric current of the output frequency from laser to from the defeated of laser
Go out the regulation rate of frequency, obtained known parameters will be measured above and are stored in main control unit, the order of magnitude of the tuning rate of temperature
For 20GHz/K, the order of magnitude of the regulation rate of electric current is 1GHz/mA；And the mesh of main laser is prestored in main control unit
Mark frequency and target power and the target frequency and target power from laser；
2) desired temperature and current setting value of setting scanning main laser, and setting scan the temperature from laser
Setting value and current setting value, for the frequency of automatic decision and setting main laser, main control unit is with certain frequency interval pair
The desired temperature for a series of scanning main laser of temperature step size settings answered, the interval of the adjacent desired temperature of each two
The output frequency interval of corresponding main laser is less than the continuous tuning coverage of the electric current of the not mode hopping of main laser, at each
On desired temperature, main control unit is with the smaller corresponding a series of scanning main laser of current steps setting of frequency interval
Current setting value, current steps are relevant with sample, are 1/10th of the line width of sample；
3) the first job point of main laser is obtained：Main control unit controls first by main laser parameter setting unit
Control temperature unit, main control unit produces a series of desired temperature of main lasers, swashs since minimum desired temperature to main
Light device carries out temperature scanning, and controls the first current unit on each desired temperature with smaller interval scan main laser
The current setting value of device, while main laser spectrum recording unit records the saturated absorption light of the main laser after digitlization in real time
Spectrum signal, main control unit judges that whether occurring laser and the saturation-absorption spectrum of atomic resonance in the spectral signal recorded believes
Number, the ratio in judgement for occurring transmission peaks and the corresponding electric current spacing of transmission peaks in main control unit is by spectral signal goes out spectrum letter
Occur saturation-absorption spectrum signal in number and judge after the output frequency of the corresponding main laser of transmission peaks, find and target frequency
The equal output frequency of rate, main control unit record the output frequency of main laser for the corresponding desired temperature of target frequency,
The power output of current setting value and now main laser, so as to obtain the first job point of main laser；
4) main control unit compares under the conditions of the first job point of main laser, and the output frequency of main laser is target
During frequency, the target power of the default main laser stored in the power output and main control unit of main laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, tolerance area in the present embodiment
Between be ± 5%, then using the parameter of first job point as main laser parameter, main control unit is opened by main laser parameter setting unit
Dynamic frequency stabilization unit, the output frequency of main laser is locked at the corresponding spectral signal peak value of target frequency, that is, is locked in light
On the resonance point of spectrum, the frequency of main laser and automatic decision and the setting of power are completed, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, into step 5)；
5) second operating point of main laser is obtained：If the power output of main laser is less than target power, increase
Plus the current setting value of main laser；If the power output of main laser is more than target power, reduce the electricity of main laser
Setting value is flowed, then according to regulation rate and electric current pair of the temperature prestored in main control unit to the output frequency of main laser
The regulation rate of the output frequency of main laser is calculated, and obtains causing the temperature value that the output frequency of main laser is constant；Master control list
The temperature of main laser is set as the temperature value that calculating above is obtained by member, and the electric current of main laser is scanned again, and search is full
With absorption spectrum signal, main control unit judges the output frequency of the corresponding main laser of spectral signal, and main control unit is recorded
The output frequency of main laser is the corresponding desired temperature of target frequency, current setting value and the now output of main laser
Power, so as to obtain second operating point of main laser；
6) main control unit compares under the conditions of second operating point, when the output frequency of main laser is target frequency, main
The target power of the default main laser stored in the power output and main control unit of laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, with second operating point
Parameter be main laser parameter, main control unit by main laser parameter setting unit start frequency stabilization unit, by the defeated of main laser
Go out Frequency Locking at the corresponding spectral signal peak value of target frequency, that is, be locked on the resonance point of spectrum, complete main laser
Frequency and power automatic decision and setting, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, into step 7)；
7) the m-th operating point of main laser is obtained, M initial values are the natural number that 3, M is >=3, and main control unit is according to
(M-1) when the output frequency of main laser is target frequency under individual operating point and (M-2) individual operating point, corresponding temperature setting
Value, current setting value and power output, the output frequency that calculating obtains main laser is target frequency and power is target work(
During rate, the temperature of main laser is set as that above-mentioned calculating is obtained by corresponding desired temperature and current setting value, main control unit
Desired temperature, then keeping temperature setting value is constant, is swept in the continuous tuning coverage of the electric current of the not mode hopping of main laser
Electric current is retouched, main control unit judges the output frequency of main laser according to the spectral signal of record, and main control unit records main laser
The output frequency of device is the corresponding desired temperature of target frequency, current setting value and the now power output of main laser,
So as to obtain the m-th operating point of main laser；
8) main control unit compares under the conditions of the m-th operating point of main laser, and the output frequency of main laser is target
During frequency, the target power of the default main laser stored in the power output and main control unit of main laser：
If c) main laser power output and the difference of target power are within fault-tolerant interval (± 5%), with m-th
The parameter of operating point is main laser parameter, and main control unit starts frequency stabilization unit by main laser parameter setting unit, by main laser
The output frequency of device is locked at the corresponding spectral signal peak value of target frequency, that is, is locked on the resonance point of spectrum, completes master
The frequency of laser and the automatic decision of power and setting, into step 9)；
If d) main laser power output and the difference of target power are beyond fault-tolerant interval (± 5%), M=M+1 is returned
Return step 7)；
9) the first job point from laser is obtained：Main control unit from laser parameter setup unit by controlling second
Control temperature unit, will be set on a series of desired temperature from laser from the temperature of laser, and in each temperature
Control the second current unit with smaller interval scan from the current setting value of laser in setting value, while main control unit is controlled
The frequency of the output signal of beat signal frequency measuring unit measurement frequency divider, until the frequency measurement of non-zero is observed, this
When from the difference on the frequency of laser and main laser in the range of ± 40GHz, and the output frequency from laser is obtained, when beat frequency letter
When number frequency measurement unit measures the frequency of non-zero, the frequency of main laser is ν, and the beat frequency rate of two lasers is f, and
The output frequency from laser is not can determine that, now there are two possible values from the frequency of laser:ν+f and ν-f；Due to electricity
It is known to flow to the regulation rate of the output frequency from laser, so after beat signal is measured, main control unit adjustment from
The electric current of laser causes the output frequency rise from laser, and the frequency of beat signal is then measured again, if beat frequency is believed
Number frequency rise, then from the frequency of laser be ν+f, if the frequency reduction of beat signal, then from the frequency of laser
Rate is ν-f, main control unit record from the output frequency of laser be target frequency when desired temperature, current setting value and defeated
Go out power, obtain the first job point from laser；
10) main control unit compares under the conditions of the first job of laser point, is mesh from the output frequency of laser
When marking frequency, the default target power from laser stored from the power output and main control unit of laser：
If a) from the difference of laser output power and target power fault-tolerant interval (being ± 5% in the present embodiment) with
Outside, into step 11)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation
Frequency locking error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The frequency of device and the automatic decision of power and setting；
11) obtain from second operating point of laser：If being less than target power from the power output of laser, increase
Plus from the current setting value of laser；If being more than target power from the power output of laser, reduce the electricity from laser
Setting value is flowed, then according to regulation rate and electric current pair of the temperature prestored in main control unit to the output frequency from laser
Calculated from the regulation rate of the output frequency of laser, obtain causing from the constant temperature value of the output frequency of laser；Master control list
Member will be set as the temperature value that calculating above is obtained from the temperature of laser, and the electric current from laser is scanned again, until seeing
The frequency measurement of non-zero is observed, while main control unit control beat signal frequency measuring unit measures the output signal of frequency divider
Frequency, and obtain the output frequency from laser, main control unit record from the output frequency of laser be target frequency when
Desired temperature, current setting value and power output, are obtained from second operating point of laser；
12) main control unit compares under the conditions of second operating point from laser, is mesh from the output frequency of laser
When marking frequency, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, into step 13)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation
Frequency locking error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The frequency of device and the automatic decision of power and setting；
13) obtain from the m-th operating point of laser, M initial values are the natural number that 3, M is >=3, and main control unit is according to
(M-1) when being target frequency from the output frequency of laser under individual operating point and (M-2) individual operating point, corresponding temperature setting
Value, current setting value and power output, it is target frequency from the output frequency of laser that calculating, which is obtained, and power is target work(
During rate, corresponding desired temperature and current setting value, main control unit will be set as that above-mentioned calculating is obtained from the temperature of laser
Desired temperature, then keeping temperature setting value is constant, is calculating sweep current near obtained current setting value, until seeing
The frequency measurement of non-zero is observed, while main control unit control beat signal frequency measuring unit measures the output signal of frequency divider
Frequency, and obtain the output frequency from laser, main control unit record from the output frequency of laser be target frequency when
Desired temperature, current setting value and power output, are obtained from the m-th operating point of laser；
14) main control unit compares under the conditions of the m-th operating point from laser, is target from the output frequency of laser
During frequency, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, M=M+1, return to step
13)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation
Frequency locking error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The frequency of device and the automatic decision of power and setting.
It is finally noted that, the purpose for publicizing and implementing example is that help further understands the present invention, but this area
Technical staff be appreciated that：Without departing from the spirit and scope of the invention and the appended claims, it is various to replace and repair
It is all possible for changing.Therefore, the present invention should not be limited to embodiment disclosure of that, and the scope of protection of present invention is to weigh
The scope that sharp claim is defined is defined.
Claims (7)
1. a kind of automatic decision simultaneously sets laser frequency and the control system of power, it is characterised in that the control system includes：
Main laser, from laser, the first control temperature unit, the second control temperature unit, the first current unit, the second current unit, the first work(
Rate detector, the second power detector, saturation-absorption spectrum unit, frequency stabilization unit, high-speed photodetector, frequency divider, first
High reflection light splitting piece, the second high reflection light splitting piece, highly transmissive light splitting piece, the 1/1st wave plate, the 1/2nd wave plate,
Quarter-wave plate, the first polarization beam splitter prism, the second polarization beam splitter prism and programmable logic device (CPLD)；Wherein, it is described
PLD transmits the parameter of temperature and electric current to the first control temperature unit and the first current unit, controls main laser
Output frequency and power output；The output light of shown main laser passes through the 1/1st wave plate and the first polarization beam splitting rib
After mirror, the light of fraction power enters saturation-absorption spectrum unit, absorption spectrum unit by saturation-absorption spectrum signal transmit to
PLD；PLD obtains the output frequency of main laser according to saturation-absorption spectrum signal；Big portion
The light of power is divided to pass through the first high reflection light splitting piece；The transmitted light of first high reflection light splitting piece enters the first power detector；The
One power detector is connected to PLD, and measurement obtains the power output of main laser；First high reflection light splitting piece
Reflected light enter the second high reflection light splitting piece, reflected light is as the first output light of main laser, and transmitted light enters second inclined
Shake beam splitter prism；PLD is connected to frequency stabilization unit, and frequency stabilization unit is connected to the first current unit, works as main laser
Power output and output frequency be target power and target frequency when, PLD start frequency stabilization unit；It is programmable
Logical device transmits the parameter of temperature and electric current to the second control temperature unit and the second current unit, controls the output from laser
Frequency and power output；Pass through highly transmissive light splitting piece from the output light of laser；The reflected light of highly transmissive light splitting piece enters second
Power detector；Second power detector is connected to PLD, and measurement obtains the power output from laser；It is high saturating
The transmitted light of light splitting piece is penetrated after the 1/2nd wave plate and the second polarization beam splitter prism, the light transmission of most of power is made
For from the second output light of laser；After the light reflection of fraction power after the second polarization beam splitter prism with it is high anti-through second
The sharp combiner of the main laser of light splitting piece transmission is penetrated, high-speed photodetector is entered after quarter-wave plate, bat is produced
Frequency signal；Beat signal passes through frequency divider, and output frequency is converted to incoming frequency 1/N, inputs to PLD, N is
Frequency dividing ratio, N is natural number.
2. control system as claimed in claim 1, it is characterised in that the programmable logic device (CPLD) passes through programming realization
Main laser parameter setting unit, main laser spectrum recording unit, main laser power trace unit, set from laser parameter
Order is first, note down unit, beat signal frequency measuring unit and main control unit from laser power；Wherein, main laser parameter
Setup unit, main laser spectrum recording unit, main laser power trace unit, from laser parameter setup unit, from swash
Light device power notes down unit and beat signal frequency measuring unit is respectively connecting to main control unit；First control temperature unit, the first electricity
Stream unit and frequency stabilization unit connect main laser parameter setting unit respectively, and main control unit passes through main laser parameter setting unit
The running parameter of main laser is set；Saturation-absorption spectrum unit is connected to main laser spectrum recording unit, main laser light
Recording unit is composed by analyzing saturation-absorption spectrum, the output frequency of main laser is obtained；First power detector is connected to master
Laser power recording unit, obtains the power output of main laser；Second control temperature unit and the second current unit are connected respectively
From laser parameter setup unit, main control unit is by setting the running parameter from laser from laser parameter setup unit；
Second power detector is connected to from laser power and notes down unit, obtains the power output from laser；Frequency divider is connected to
Beat signal frequency measuring unit, measures the frequency of the output signal of frequency divider.
3. control system as claimed in claim 1, it is characterised in that first power detector and the second power detector
Using photodiode.
4. control system as claimed in claim 1, it is characterised in that the high-speed photodetector is detected using indium gallium arsenic
Device.
5. a kind of automatic decision simultaneously sets laser frequency and the control method of power, it is characterised in that the control method includes
Following steps：
1) measurement in advance obtains temperature to the output frequency of the regulation rate and electric current of the output frequency of main laser to main laser
The regulation rate of rate, and measurement temperature to the regulation rate and electric current of the output frequency from laser to the output frequency from laser
The regulation rate of rate, obtained known parameters will be measured above and are stored in main control unit；And prestored in main control unit
The target frequency and target power of main laser and the target frequency and target power from laser；
2) desired temperature and current setting value of setting scanning main laser, and setting scanning are set from the temperature of laser
Value and current setting value, for the frequency of automatic decision and setting main laser, main control unit is corresponding with certain frequency interval
Temperature step size settings it is a series of scanning main laser desired temperature, on each desired temperature, main control unit with
The current setting value of the corresponding a series of scanning main laser of current steps setting of smaller frequency interval；
3) the first job point of main laser is obtained：Main control unit controls the first temperature control by main laser parameter setting unit
Unit, main control unit produces a series of desired temperature of main lasers, to main laser since minimum desired temperature
Temperature scanning is carried out, and the first current unit is controlled with smaller interval scan main laser on each desired temperature
Current setting value, while main laser spectrum recording unit records the saturation-absorption spectrum letter of the main laser after digitlization in real time
Number, main control unit judges the saturation-absorption spectrum signal of laser and atomic resonance whether occur in the spectral signal recorded,
The ratio in judgement for occurring transmission peaks and the corresponding electric current spacing of transmission peaks in main control unit is by spectral signal goes out spectral signal
After the middle output frequency for saturation-absorption spectrum signal occur and judging the corresponding main laser of transmission peaks, find and target frequency
Equal output frequency, the output frequency that main control unit records main laser is the corresponding desired temperature of target frequency, electricity
Setting value and the now power output of main laser are flowed, so as to obtain the first job point of main laser；
4) main control unit compares under the conditions of the first job point of main laser, and the output frequency of main laser is target frequency
When, the target power of the default main laser stored in the power output and main control unit of main laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, with the ginseng of first job point
Number is main laser parameter, and main control unit starts frequency stabilization unit by main laser parameter setting unit, by the output frequency of main laser
Rate is locked at the corresponding spectral signal peak value of target frequency, that is, is locked on the resonance point of spectrum, completes the frequency of main laser
The automatic decision and setting of rate and power, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, into step 5)；
5) second operating point of main laser is obtained：If the power output of main laser is less than target power, increase master
The current setting value of laser；If the power output of main laser is more than target power, the electric current for reducing main laser is set
Definite value, then swashs according to the temperature prestored in main control unit to the regulation rate and electric current of the output frequency of main laser to main
The regulation rate of the output frequency of light device is calculated, and obtains causing the temperature value that the output frequency of main laser is constant；Main control unit will
The temperature of main laser is set as the temperature value that calculating above is obtained, and the electric current of main laser is scanned again, and search saturation is inhaled
Spectral signal is received, main control unit judges the output frequency of the corresponding main laser of spectral signal, and main control unit is recorded main sharp
The output frequency of light device is the corresponding desired temperature of target frequency, current setting value and the now output work of main laser
Rate, so as to obtain second operating point of main laser；
6) main control unit compares under the conditions of second operating point of main laser, and the output frequency of main laser is target frequency
When, the target power of the default main laser stored in the power output and main control unit of main laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, with the ginseng of second operating point
Number is main laser parameter, and main control unit starts frequency stabilization unit by main laser parameter setting unit, by the output frequency of main laser
Rate is locked at the corresponding spectral signal peak value of target frequency, that is, is locked on the resonance point of spectrum, completes the frequency of main laser
The automatic decision and setting of rate and power, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, into step 7)；
7) the m-th operating point of main laser is obtained, M initial values are the natural number that 3, M is >=3, and main control unit is according to (M-1)
When the output frequency of main laser is target frequency under individual operating point and (M-2) individual operating point, corresponding desired temperature, electricity
Setting value and power output are flowed, is calculated and is obtained the output frequency of main laser and be target frequency and when power is target power,
The temperature of main laser is set as the temperature that above-mentioned calculating is obtained by corresponding desired temperature and current setting value, main control unit
Setting value, then keeping temperature setting value is constant, in the continuous tuning coverage sweep current of the electric current of the not mode hopping of main laser,
Main control unit judges the output frequency of main laser according to the spectral signal of record, and main control unit records the output of main laser
Frequency is the corresponding desired temperature of target frequency, current setting value and the now power output of main laser, so as to obtain
The m-th operating point of main laser；
8) main control unit compares under the conditions of the m-th operating point of main laser, and the output frequency of main laser is target frequency
When, the target power of the default main laser stored in the power output and main control unit of main laser：
If a) main laser power output and the difference of target power are within fault-tolerant interval, with the ginseng of m-th operating point
Number is main laser parameter, and main control unit starts frequency stabilization unit by main laser parameter setting unit, by the output frequency of main laser
Rate is locked at the corresponding spectral signal peak value of target frequency, that is, is locked on the resonance point of spectrum, completes the frequency of main laser
The automatic decision and setting of rate and power, into step 9)；
If b) main laser power output and the difference of target power are beyond fault-tolerant interval, M=M+1, return to step 7)；
9) the first job point from laser is obtained：Main control unit from laser parameter setup unit by controlling the second temperature control
Unit, will be set on a series of desired temperature from laser from the temperature of laser, and in the setting of each temperature
Control the second current unit with smaller interval scan from the current setting value of laser in value, while main control unit controls beat frequency
The frequency of the output signal of signal frequency measuring unit measurement frequency divider, until observing the frequency measurement of non-zero, and is obtained
From the output frequency of laser, main control unit record from the output frequency of laser be target frequency when desired temperature, electricity
Setting value and power output are flowed, the first job point from laser is obtained；
10) main control unit compares under the conditions of the first job of laser point, is target frequency from the output frequency of laser
During rate, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, into step 11)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation frequency locking
Error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The automatic decision and setting of frequency and power；
11) obtain from second operating point of laser：If being less than target power from the power output of laser, increase from
The current setting value of laser；If being more than target power from the power output of laser, reduce and set from the electric current of laser
Definite value, then according to the temperature prestored in main control unit to the regulation rate and electric current of the output frequency from laser to from swashing
The regulation rate of the output frequency of light device is calculated, and obtains causing from the constant temperature value of the output frequency of laser；Main control unit will
It is set as the temperature value that calculating above is obtained from the temperature of laser, the electric current from laser is scanned again, until observes
The frequency measurement of non-zero, while the frequency of the output signal of main control unit control beat signal frequency measuring unit measurement frequency divider
Rate, and obtain the output frequency from laser, main control unit record from the output frequency of laser be target frequency when temperature
Setting value, current setting value and power output, are obtained from second operating point of laser；
12) main control unit compares under the conditions of second operating point from laser, is target frequency from the output frequency of laser
During rate, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, into step 13)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation frequency locking
Error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The automatic decision and setting of frequency and power；
13) obtain from the m-th operating point of laser, M initial values are the natural number that 3, M is >=3, and main control unit is according to (M-
1) when being target frequency from the output frequency of laser under individual operating point and (M-2) individual operating point, corresponding desired temperature,
Current setting value and power output, it is target frequency from the output frequency of laser that calculating, which is obtained, and power is target power
When, corresponding desired temperature and current setting value, main control unit will be set as what above-mentioned calculating was obtained from the temperature of laser
Desired temperature, then keeping temperature setting value is constant, is calculating sweep current near obtained current setting value, until observation
To the frequency measurement of non-zero, while main control unit control beat signal frequency measuring unit measures the output signal of frequency divider
Frequency, and obtain the output frequency from laser, main control unit record from the output frequency of laser be target frequency when temperature
Setting value, current setting value and power output are spent, is obtained from the m-th operating point of laser；
14) main control unit compares under the conditions of the m-th operating point from laser, is target frequency from the output frequency of laser
When, the default target power from laser stored from the power output and main control unit of laser：
If a) difference from laser output power and target power is beyond fault-tolerant interval, M=M+1, return to step 13)；
If b) from the power output of laser and the difference of target power within fault-tolerant interval, main control unit generation frequency locking
Error signal, by transmitting error signal to the second current unit from laser parameter setup unit, is realized from laser
The automatic decision and setting of frequency and power.
6. control method as claimed in claim 5, it is characterised in that in step 3) in, the adjacent desired temperature of each two
The corresponding main laser in interval output frequency interval be less than main laser not mode hopping electric current continuous tuning coverage.
7. control method as claimed in claim 5, it is characterised in that in step 9) in, the output frequency from laser is obtained,
Comprise the following steps：When beat signal frequency measuring unit measures the frequency of non-zero, the frequency of main laser is ν, two
The beat frequency rate of laser is f, not can determine that the output frequency from laser, now has two possibility from the frequency of laser
Value:ν+f and ν-f；Because electric current is known to the regulation rate of the output frequency from laser, so measuring beat frequency
After signal, main control unit is adjusted to raise from the output frequency of laser from the electric current of laser, and beat frequency is then measured again
The frequency of signal, if the frequency rise of beat signal, then from the frequency of laser be ν+f, if the frequency of beat signal
Reduction, then from the frequency of laser be ν-f.
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| CN108054628A (en) * | 2017-12-05 | 2018-05-18 | 深圳市创鑫激光股份有限公司 | Control system, laser, the equipment with laser of laser |
| CN109115252A (en) * | 2018-09-21 | 2019-01-01 | 太原理工大学 | A kind of Grating examinations device based on fiber annular cavity-type BPM |
| CN109449742A (en) * | 2019-01-15 | 2019-03-08 | 北京航空航天大学 | One kind being used for SERF atom inertial measuring unit laser bistable frequency light path system |
| CN110646101A (en) * | 2019-11-04 | 2020-01-03 | 中国科学院国家授时中心 | Laser wavelength automatic tracking method and system for optical fiber time transmission |
| CN110867720A (en) * | 2018-08-27 | 2020-03-06 | 北京大学 | Miniaturized low-cost large-frequency tuning range frequency-stabilized laser system and method |
| CN111697422A (en) * | 2020-06-24 | 2020-09-22 | 中国人民解放军国防科技大学 | Phase modulation type Raman optical power control method and system |
| CN113594859A (en) * | 2020-04-30 | 2021-11-02 | 上海禾赛科技有限公司 | Injection locking correction method and device |
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| CN109115252A (en) * | 2018-09-21 | 2019-01-01 | 太原理工大学 | A kind of Grating examinations device based on fiber annular cavity-type BPM |
| CN109449742A (en) * | 2019-01-15 | 2019-03-08 | 北京航空航天大学 | One kind being used for SERF atom inertial measuring unit laser bistable frequency light path system |
| CN110646101A (en) * | 2019-11-04 | 2020-01-03 | 中国科学院国家授时中心 | Laser wavelength automatic tracking method and system for optical fiber time transmission |
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| CN113594859B (en) * | 2020-04-30 | 2023-02-21 | 上海禾赛科技有限公司 | Injection locking correction method and device |
| CN111697422A (en) * | 2020-06-24 | 2020-09-22 | 中国人民解放军国防科技大学 | Phase modulation type Raman optical power control method and system |
| CN111697422B (en) * | 2020-06-24 | 2021-05-14 | 中国人民解放军国防科技大学 | Phase modulation type Raman optical power control method and system |
| CN117433645A (en) * | 2023-10-30 | 2024-01-23 | 重庆航伟光电科技有限公司 | Semiconductor laser wavelength measurement method, device, chip and terminal |
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