CN109346913A - A kind of round trip flight second laser optics frequency comb locking device based on fibre delay line - Google Patents
A kind of round trip flight second laser optics frequency comb locking device based on fibre delay line Download PDFInfo
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- CN109346913A CN109346913A CN201811038662.2A CN201811038662A CN109346913A CN 109346913 A CN109346913 A CN 109346913A CN 201811038662 A CN201811038662 A CN 201811038662A CN 109346913 A CN109346913 A CN 109346913A
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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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- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
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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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection
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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
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
- H01S3/2391—Parallel arrangements emitting at different wavelengths
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Abstract
The invention discloses a kind of round trip flight second laser optics frequency comb locking device based on fibre delay line, including femto-second laser, carrier envelope offset Frequency Locking system, fiber bragg grating, wavelength division multiplexer, 2 × 2 fiber optic splitters, Faraday mirror, optical fiber delay link, adjustable dispersion compensating system, acousto-optic modulator, Faraday mirror, photodetector, frequency mixer, locking phase controller, radio frequency reference and electricity frequency multiplier；2 × 2 fiber optic splitters include tetra- ports a, b, c, d；The device is suitable for two communication band femto-second lasers with certain repetition rate difference, utilize the repetition rate of two lasers of optical fiber delay line lockout of kilometers, it is poor to be allowed to generate fixed frequency, the locking of carrier envelope offset frequency, the final operating for realizing dipulse femtosecond laser are finally realized using Self-referencing interferometer.The device has many advantages, such as that simple structure, low cost, repetition rate difference is adjustable.
Description
Technical field
The present invention relates to the femtosecond laser rangings based on pulse time-of-flight, Ultrafast spectrum field, and in particular to a kind of
Round trip flight second laser optics frequency comb locking device based on fibre delay line.Two-laser output pulse sequence in the device
Repetition rate difference may be locked to optional frequency value, be applicable to the round trip flight second laser optics frequency of the femto-second laser of communication band
Comb locking.
Background technique
Optical frequency com is invented from last century the nineties, has been widely used in fields of measurement, such as temporal frequency
Benchmark, range measurement, spectroscopy etc..Two repetition rate differences are constant, the femtosecond laser optics of carrier envelope offset frequency stabilization
Frequency comb is referred to as round trip flight second laser optics frequency comb system.In round trip flight second laser optics frequency comb system, due to two pulse sequences
The presence of column repetition rate difference, a pulse train are sampled to another pulse train, are detected by photodetector, can be
Frequency of oscillation be the optics oscillation frequency signal of hundred terahertz wave bands it is down-sampled be girz magnitude electrical signal.From the electricity
Signal accurately can go out the time-domain of femtosecond pulse optical signalling, frequency-domain information by inverse, realize and be based on round trip flight second laser light
Learn the accurate measurement of frequency comb system.2009, I.Coddington of National Institute of Standards and Technology et al. was used
Round trip flight second laser optics frequency comb system realizes large scale absolute distance accurate measurement, when measuring target range is 30km,
Measurement accuracy < 5nm, uncertainty of measurement 10-13.National Institute of Standards and Technology is using round trip flight second laser optics
Frequency comb system carries out the technology of the measurement of characterization of molecules absorption spectra similarly advanced in the world, which uses different-waveband
Round trip flight second laser optics frequency comb system, in conjunction with the method for the asynchronous down-sampled and time domain Fourier transformation of optics, to HCN points
The characteristic absorpting spectrum of son, hydrone etc. is measured, and has very high consistency with the result in HITRAN database.
The round trip flight second laser optics frequency comb locking device of function admirable is to realize the operating of round trip flight second laser optics frequency comb
Key.Cover the round trip flight second laser optics frequency of each optical region (800nm, 1550nm and 2000nm wave band), low noise
Comb is widely used in the fields of measurement such as range measurement, spectroscopy.Currently, commonly realizing round trip flight second laser optics
There are mainly two types of the methods of frequency comb.The first is that the repetition rate of two femto-second lasers is locked to penetrating for two different frequencies
Frequency benchmark, then again by the carrier envelope offset Frequency Locking of two lasers to the same radio frequency reference, to realize two
There is the operating of the femtosecond laser optical frequency com of repetition rate difference.But since the method is to refer to optical frequency to radio frequency base
Standard promotes the performance of phase-locked system in any case, and optical frequency also has very big remaining noise, and then leads to two femtoseconds
The decline of laser degree of coherence.Second method is that the repetition rate of two femto-second lasers is locked to two different frequencies
Optical frequency benchmark, i.e. on two super steady chambers of the slightly different optics of frequency.It is then again that the carrier envelope of two lasers is inclined
Shift frequency rate is locked to the same radio frequency reference, to realize the fortune for the femtosecond laser optical frequency com that two have repetition rate difference
Turn.But super steady chamber is limited to that structure is complicated, cost and its valuableness, high cost disadvantage, is unfavorable for promoting.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of round trip flight second based on fibre delay line
Laser optics frequency comb locking device, the device are suitable for two communication band femtosecond lasers with certain repetition rate difference
Device, using the repetition rate of two lasers of optical fiber delay line lockout of kilometers, it is poor to be allowed to generate fixed frequency, finally
The locking of carrier envelope offset frequency, the final operating for realizing dipulse femtosecond laser are realized using Self-referencing interferometer.
The device has many advantages, such as that simple structure, low cost, repetition rate difference is adjustable.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of round trip flight second laser optics frequency comb locking device based on fibre delay line, including the first femto-second laser,
Second femto-second laser, the first femto-second laser carrier envelope offset Frequency Locking system, the second femto-second laser carrier envelope
Deviation frequency locking system, the first fiber bragg grating, the second fiber bragg grating, the first wavelength division multiplexer, 2 × 2 light
Fine beam splitter, Faraday mirror, optical fiber delay link, adjustable dispersion compensating system, acousto-optic modulator, Faraday mirror,
Second wavelength division multiplexer, the first photodetector, the second photodetector, the first frequency mixer, the second frequency mixer, the first locking phase control
Device, the second locking phase controller, radio frequency reference and electricity frequency multiplier processed；The first femto-second laser carrier envelope offset frequency locker
System and the second femto-second laser carrier envelope offset Frequency Locking system are determined by femto-second laser, spectrum widening device, optics
Frequency-doubling crystal, photodetector, radio frequency reference, digital phase discriminator and locking phase controller composition；2 × 2 fiber optic splitter packet
Include tetra- ports a, b, c, d；
First femto-second laser and the pulse train of the second femto-second laser output pass through the first femto-second laser carrier wave packet
Network deviation frequency locking system and the second femto-second laser carrier envelope offset Frequency Locking system realize that carrier envelope is inclined respectively
The locking of shift frequency rate, radio frequency reference is via electricity frequency multiplier frequency multiplication；The pulse train of first femto-second laser output is successively passed through
Enter the end a of 2 × 2 fiber optic splitters, the c of 2 × 2 fiber optic splitters after first fiber bragg grating, the first wavelength division multiplexer
The pulse train of end output is back to the end b, the pulse train of the end the d output of 2 × 2 fiber optic splitters after Faraday mirror
The end b, the end b are successively back to after optical fiber delay link, adjustable dispersion compensating system, acousto-optic modulator and Faraday mirror
The pulse train of output is after the second wavelength division multiplexer, the first photodetector, by the first frequency mixer by the first photodetection
After the frequency-doubled signal mixing of the signal and radio frequency reference of device output, mixed frequency signal is input to the first locking phase controller, by the first lock
Phase control device controls the repetition rate adjuster in the first femto-second laser, realizes the optical frequency lock of the first femto-second laser
It is fixed；
The pulse train of second femto-second laser output successively passes through the second fiber bragg grating, the first wavelength division multiplexer
Enter the end a of 2 × 2 fiber optic splitters afterwards, the pulse train of the end the c output of 2 × 2 fiber optic splitters is after Faraday mirror
It is back to the end b, the pulse train of the end the d output of 2 × 2 fiber optic splitters successively passes through optical fiber delay link, adjustable dispersion compensating
Be back to the end b after system, acousto-optic modulator and Faraday mirror, the pulse train of the end b output by the second wavelength division multiplexer,
After second photodetector, the frequency-doubled signal of signal and radio frequency reference that the second photodetector exports is mixed by the second frequency mixer
After frequency, mixed frequency signal is input to the second locking phase controller, controls the repetition in the second femto-second laser by the second locking phase controller
Frequency regulator realizes the optical frequency locking of the second femto-second laser.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
1. the repetition rate lock part in the technical program depends on the optical delay link of kilometers, do not include high
Expensive high-precision optical frequency reference source, such as the super steady chamber of optics.The super steady chamber of optics has that structure is complicated, cost and its high
Expensive, high cost disadvantage, is unfavorable for promoting.And in the present invention optical delay link use so that whole system it is relatively simple,
It is low in cost.
2. two femto-second lasers may be implemented by changing the chromatic dispersion compensation quantity of Dispersion Compensation Systems in the technical program
Repetition rate difference continuously adjusts.
3. the wavelength for being suitable for exporting pulse in the technical solution principle is any wave band (800nm, 1040nm, 1550nm
And 2000nm) femto-second laser.
4. apparatus of the present invention structure is simple, the repetition rate difference of two-laser output pulse sequence can be mended by adjusting dispersion
The compensation rate for repaying system is locked to optional frequency value, and the two-laser after locking can get the time domain interference signal of high degree of coherence,
Conducive to being widely popularized.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the composed structure schematic diagram of femto-second laser carrier envelope offset Frequency Locking system.
Appended drawing reference: the first femto-second laser of 1-；The second femto-second laser of 2-；3- the first femto-second laser carrier envelope is inclined
Shift frequency rate locking system；4- the second femto-second laser carrier envelope offset Frequency Locking system；The first fiber bragg grating of 5-；
The second fiber bragg grating of 6-；The first wavelength division multiplexer of 7-；The fiber optic splitter of 8-2 × 2；9- Faraday mirror；10- optical fiber
Delay chain；11- adjustable dispersion compensating system；12- acousto-optic modulator；13- Faraday mirror；The second wavelength division multiplexer of 14-；
The first photodetector of 15-；The second photodetector of 16-；The first frequency mixer of 17-；The second frequency mixer of 18-；19- the first locking phase control
Device processed；20- the second locking phase controller；21- radio frequency reference；22- electricity frequency multiplier；23- femto-second laser；24- spectrum widening device；
25- Optical doubling frequency crystal；26- photodetector；27- radio frequency reference；28- digital phase discriminator；29- locking phase controller.Wherein, real
Line represents optical path, and dotted line represents electrical tracks.
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
As shown in Figure 1, a kind of round trip flight second laser optics frequency comb locking device based on fibre delay line, the first femtosecond swashs
Light device 1 and the pulse train of the second femto-second laser 2 output pass through the first femto-second laser carrier envelope offset Frequency Locking system
System 3 and the second femto-second laser carrier envelope offset Frequency Locking system 4 realize the locking of carrier envelope offset frequency respectively, penetrate
Frequency benchmark 21 is via 22 frequency multiplication of electricity frequency multiplier；The pulse train of first femto-second laser 1 output successively passes through the first optical fiber cloth
Enter the end a of 2 × 2 fiber optic splitters 8, the end the c output of 2 × 2 fiber optic splitters 8 after glug grating 5, the first wavelength division multiplexer 7
Pulse train be back to the end b after Faraday mirror 9, the pulse train of the end the d output of 2 × 2 fiber optic splitters 8 is successively
B is back to after optical fiber delay link 10, adjustable dispersion compensating system 11, acousto-optic modulator 12 and Faraday mirror 13
End, the pulse train of the end b output, will by the first frequency mixer 17 after the second wavelength division multiplexer 14, the first photodetector 15
After the frequency-doubled signal mixing of the signal and radio frequency reference 21 of the output of first photodetector 15, mixed frequency signal is input to the first locking phase
Controller 19 controls the repetition rate adjuster in the first femto-second laser 1 by the first locking phase controller 19, realizes the first femtosecond
The optical frequency of laser 1 locks；
The pulse train of second femto-second laser 2 output successively passes through the second fiber bragg grating 6, the first wavelength-division multiplex
Enter the end a of 2 × 2 fiber optic splitters 8 after device 7, the pulse train of the end the c output of 2 × 2 fiber optic splitters 8 is revolved by faraday
It is back to the end b after light microscopic 9, the pulse train of the end the d output of 2 × 2 fiber optic splitters 8 successively passes through optical fiber delay link 10, can
The end b, the pulse train warp of the end b output are back to after Tuneable Dispersion Compensation system 11, acousto-optic modulator 12 and Faraday mirror 13
After crossing the second wavelength division multiplexer 14, the second photodetector 16, second photodetector 16 is exported by the second frequency mixer 18
After the mixing of the frequency-doubled signal of signal and radio frequency reference 21, mixed frequency signal is input to the second locking phase controller 20, by the second locking phase control
Device 20 processed controls the repetition rate adjuster in the second femto-second laser 2, realizes the optical frequency lock of the second femto-second laser 2
It is fixed.
Specifically, exporting the first femto-second laser of optical fiber of the communication band of pulse recurrence frequency slight difference using two
1 and second femto-second laser 2 carry out repetition rate and carrier envelope offset frequency locking.First femto-second laser 1 and second
For the repetition rate difference of femto-second laser 2 generally in kHz magnitude, output spectrum range need to cover 1540~1560nm range i.e.
It can.It the use of central wavelength is 1540nm, the first fiber bragg grating 5 that filtering bandwidth is 1nm is used as optical filter, by the
The pulse train of one femto-second laser 1 output is filtered.It similarly, the use of central wavelength is 1560nm, filtering bandwidth 1nm
The second fiber bragg grating 6 be used as optical filter, the pulse train that the second femto-second laser 2 exports is filtered.
The two filtered narrow-band spectrums are subjected to conjunction beam by 154,0/1,560 first wavelength division multiplexer 7.If closed two after beam
The sum of power of wavelength is lower than 20mW, then needs a communication band fiber amplifier that two narrow-band spectrums are amplified to 20mW together.
Two pulse train incidences are entered to the end a of one 2 × 2 fiber optic splitters 8.After the end the c output pulse sequence of 2 × 2 fiber optic splitters 8
Through 9 backtracking of Faraday mirror to the end b, the pulse train of the end d output passes through the optical fiber delay chain that length is 140m respectively
After road 10, adjustable dispersion compensating system 11 and acousto-optic modulator 12 (modulating frequency 50MHz), by the former road of optical fiber faraday mirror 13
It returns, closes beam in the other end of beam splitter.Pulse train after closing beam will by 154,0/1,560 second wavelength division multiplexer 14
The pulse train of 1540nm and 1560nm separates, incident respectively to enter two indium gallium arsenic the first photodetectors 15, second of high speed
In photodetector 16.It is 100MHz that centre frequency can be obtained on the first photodetector 15, the second photodetector 16
Radio frequency interference signal.It is amplified to by central wavelength is 100MHz, bandwidth is 24MHz bandpass filter and electrical amplifier
>0dBm.The driving signal of acousto-optic modulator is the radio frequency reference 21 of high stability, using an electricity frequency multiplier 22 by the radio frequency base
Standard carries out frequency multiplication.The frequency-doubled signal of interference signal and acousto-optic modulator driving signal that first photodetector 15 is exported uses
First frequency mixer 17 is mixed, and the relevant error signal of available first femto-second laser, 1 repetition rate believes this error
It number after the first locking phase controller 19, is loaded on the repetition rate adjuster of the first femto-second laser 1, realization flies first
The repetition rate of second laser 1 is locked to optical fiber link, i.e., the chamber length of the first femto-second laser 1 is locked to the whole of optical fiber link
The one of several times point.Similarly, the frequency multiplication of the interference signal and acousto-optic modulator driving signal that the second photodetector 16 are exported
Signal is mixed, the relevant error signal of available second femto-second laser, 2 repetition rate, by this error signal by the
It after two locking phase controllers 20, is loaded on the repetition rate adjuster of the second femto-second laser 2, realizes the second femto-second laser
2 repetition rate is locked to optical fiber link.Since, there are dispersion, which swashs two optical fiber in the optical fiber of kilometers length
The light path of the different wave length of light device is different, therefore that there are repetition rates is poor for two lasers after locking, here, can pass through adjusting
Dispersion Compensation Systems in optical fiber link suitably adjust repetition rate difference.
As shown in Fig. 2, the first femto-second laser carrier envelope offset Frequency Locking system 3 and the second femtosecond in the present embodiment
Laser carrier envelope offset Frequency Locking system 4 by femto-second laser 23, spectrum widening device 24, Optical doubling frequency crystal 25,
Photodetector 26, radio frequency reference 27, digital phase discriminator 28 and locking phase controller 29 form.By the first femto-second laser and second
The pulse train of femto-second laser output passes through highly nonlinear optical fiber respectively, and highly nonlinear optical fiber is as spectrum widening device, by light
Spectrum widening, so that spectral region covers 1100nm to 2200nm after output.Service life poled lithium Niobate is as optics times
Spectrum near 2200nm is multiplied to 1100nm by frequency crystal, incident together with the 1100nm spectrum before frequency multiplication to enter photodetection
Device can obtain carrier envelope offset frequency signal, by this signal feedback lock to the pumping current of laser, realize carrier wave
The locking of envelope migration frequency.
The present invention is not limited to embodiments described above.Above the description of specific embodiment is intended to describe and say
Bright technical solution of the present invention, the above mentioned embodiment is only schematical, is not restrictive.This is not being departed from
In the case of invention objective and scope of the claimed protection, those skilled in the art may be used also under the inspiration of the present invention
The specific transformation of many forms is made, within these are all belonged to the scope of protection of the present invention.
Claims (2)
1. a kind of round trip flight second laser optics frequency comb locking device based on fibre delay line, which is characterized in that fly including first
Second laser (1), the second femto-second laser (2), the first femto-second laser carrier envelope offset Frequency Locking system (3), second
Femto-second laser carrier envelope offset Frequency Locking system (4), the first fiber bragg grating (5), the second optical fiber Bragg light
Grid (6), the first wavelength division multiplexer (7), 2 × 2 fiber optic splitters (8), Faraday mirror (9), optical fiber delay link (10), can
Tuneable Dispersion Compensation system (11), acousto-optic modulator (12), Faraday mirror (13), the second wavelength division multiplexer (14), the first light
Electric explorer (15), the second photodetector (16), the first frequency mixer (17), the second frequency mixer (18), the first locking phase controller
(19), the second locking phase controller (20), radio frequency reference (21) and electricity frequency multiplier (22)；2 × 2 fiber optic splitter (8) packet
Include tetra- ports a, b, c, d；
First femto-second laser (1) and the pulse train of the second femto-second laser (2) output pass through the first femto-second laser carrier wave
Envelope migration Frequency Locking system (3) and the second femto-second laser carrier envelope offset Frequency Locking system (4) realize load respectively
The locking of wave envelope deviation frequency, radio frequency reference (21) is via electricity frequency multiplier (22) frequency multiplication；First femto-second laser (1) output
Pulse train successively after the first fiber bragg grating (5), the first wavelength division multiplexer (7) enter 2 × 2 fiber optic splitters
(8) pulse train at the end a, the end the c output of 2 × 2 fiber optic splitters (8) is back to the end b after Faraday mirror (9), and 2
The pulse train of the end the d output of × 2 fiber optic splitters (8) successively passes through optical fiber delay link (10), adjustable dispersion compensating system
(11), it is back to the end b after acousto-optic modulator (12) and Faraday mirror (13), the pulse train of the end b output passes through the second wave
After division multiplexer (14), the first photodetector (15), the first photodetector (15) is exported by the first frequency mixer (17)
After the mixing of the frequency-doubled signal of signal and radio frequency reference (21), mixed frequency signal is input to the first locking phase controller (19), by the first lock
Phase control device (19) controls the repetition rate adjuster in the first femto-second laser (1), realizes the light of the first femto-second laser (1)
Learn Frequency Locking；
The pulse train of second femto-second laser (2) output successively passes through the second fiber bragg grating (6), the first wavelength-division multiplex
Device (7) enters the end a of 2 × 2 fiber optic splitters (8) afterwards, and the pulse train of the end the c output of 2 × 2 fiber optic splitters (8) passes through method
It is back to the end b after drawing polariscope (9), the pulse train of the end the d output of 2 × 2 fiber optic splitters (8) successively passes through optical fiber delay
The end b, the end b are back to after link (10), adjustable dispersion compensating system (11), acousto-optic modulator (12) and Faraday mirror (13)
The pulse train of output, will by the second frequency mixer (18) after the second wavelength division multiplexer (14), the second photodetector (16)
After the frequency-doubled signal mixing of the signal and radio frequency reference (21) of second photodetector (16) output, mixed frequency signal is input to second
Locking phase controller (20), it is real by the repetition rate adjuster in the second locking phase controller (20) control the second femto-second laser (2)
The optical frequency locking of existing second femto-second laser (2).
2. a kind of round trip flight second laser optics frequency comb locking device based on fibre delay line according to claim 1, special
Sign is, the first femto-second laser carrier envelope offset Frequency Locking system (3) and the second femto-second laser carrier envelope
Deviation frequency locking system (4) is visited by femto-second laser (23), spectrum widening device (24), Optical doubling frequency crystal (25), photoelectricity
Survey device (26), radio frequency reference (27), digital phase discriminator (28) and locking phase controller (29) composition.
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| CN201811038662.2A CN109346913B (en) | 2018-09-06 | 2018-09-06 | Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line |
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| CN201811038662.2A CN109346913B (en) | 2018-09-06 | 2018-09-06 | Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line |
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| CN110277724A (en) * | 2019-06-25 | 2019-09-24 | 中国人民解放军军事科学院国防科技创新研究院 | A kind of adjustable high repetition frequency single-chamber bicoherence optical frequency com light source |
| CN110895339A (en) * | 2019-11-01 | 2020-03-20 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
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| CN113206434A (en) * | 2021-05-07 | 2021-08-03 | 北京邮电大学 | Pre-compensation feedback control system and method for frequency difference locking of fiber laser |
| CN113300207A (en) * | 2021-06-24 | 2021-08-24 | 东莞理工学院 | Asynchronous locking method and device for repetition frequency of ultrashort pulse laser |
| CN116047535A (en) * | 2022-12-30 | 2023-05-02 | 电子科技大学 | Dual-optical frequency comb time-of-flight ranging system based on dispersion Fourier transform |
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| CN110277724B (en) * | 2019-06-25 | 2021-01-08 | 中国人民解放军军事科学院国防科技创新研究院 | Adjustable high-repetition-frequency single-cavity double-phase-dry optical frequency comb light source |
| CN110895339A (en) * | 2019-11-01 | 2020-03-20 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
| CN110895339B (en) * | 2019-11-01 | 2022-02-25 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
| CN112782725A (en) * | 2020-12-30 | 2021-05-11 | 华清瑞达（天津）科技有限公司 | High-precision GPS synchronization maintaining module |
| CN113206434A (en) * | 2021-05-07 | 2021-08-03 | 北京邮电大学 | Pre-compensation feedback control system and method for frequency difference locking of fiber laser |
| CN113300207A (en) * | 2021-06-24 | 2021-08-24 | 东莞理工学院 | Asynchronous locking method and device for repetition frequency of ultrashort pulse laser |
| CN113300207B (en) * | 2021-06-24 | 2022-07-12 | 东莞理工学院 | Asynchronous locking method and device for repetition frequency of ultrashort pulse laser |
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| CN116047535B (en) * | 2022-12-30 | 2024-03-22 | 电子科技大学 | Dual-optical frequency comb time-of-flight ranging system based on dispersion Fourier transform |
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