CN109378695A - High-average-power mode-locked laser generation system and method based on optical frequency comb locking - Google Patents
High-average-power mode-locked laser generation system and method based on optical frequency comb locking Download PDFInfo
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- CN109378695A CN109378695A CN201811322816.0A CN201811322816A CN109378695A CN 109378695 A CN109378695 A CN 109378695A CN 201811322816 A CN201811322816 A CN 201811322816A CN 109378695 A CN109378695 A CN 109378695A
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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
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
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Abstract
The invention provides a high average power mode-locked laser generation system and method based on optical frequency comb locking, which comprises the following steps: the seed source is continuously laser-seeded to generate single-frequency or narrow-linewidth continuous laser; the laser beam splitting unit is used for splitting the seed laser into a plurality of paths of lasers with equal power; the optical frequency comb laser unit is used for generating optical frequency comb laser comb teeth with equal intervals of multiple carrier frequencies and phases meeting a mode locking relation; the carrier frequency and phase locking unit is used for respectively locking the carrier frequency and the phase of each path of continuous laser to the optical frequency comb laser comb teeth with the same carrier frequency interval; the high-power continuous laser amplification unit consists of high-power continuous laser amplifiers arranged on each path and is used for respectively amplifying the high-power continuous laser of each carrier frequency; and the heterodyne beam synthesis unit performs heterodyne beam synthesis on each path of amplified continuous laser to generate the mode-locked laser with high average power.
Description
Technical field
The present invention relates to a kind of laser mode locking technology, especially a kind of high-average power mode locking based on frequency comb locking swashs
Light generation system and method.
Background technique
Laser mode locking technology is the current technical way for generating ultrashort and ultrahigh laser, the ultra-short pulse width created
The temporal resolution of superelevation is made it have, thus is widely used in the detection of ultrafast phenomena, such as detects electron transition and relaxation
The ultrafast process such as Henan, atom nuclear motion, formation of chemical bond.Ultrahigh peak power brought by ultrashort pulse width, so that lock
Mould laser is used not only for the damage and processing of material, also be used to create extreme physical environment, e.g., laser particle accelerators,
Laser controlled nuclear fusion, excitation positron-electron equity.
Since the nonlinear effect that the peak power of mode-locked laser superelevation easily causes laser working medium is even damaged, so that
The promotion of mode-locked laser mean power faces biggish technical problem.Currently, generalling use chirp amplifying technique, pulsed reactor accumulates
Big technology, mode locking optics coherence tomography technology etc. promote the pulse energy or mean power of mode-locked laser.
Chirped pulse amplification technique is first to broaden mode-locked laser pulse to reduce in amplification process to reduce peak power
Nonlinear effect, then Pulse Compression is carried out to the amplified pulse of energy.Although lock can be substantially improved in chirped pulse amplification technique
The pulse energy of mould laser, but it is usually to sacrifice repetition as cost, so that the mean power promotion of mode-locked laser extremely has
Limit, the state-of-the-art mean power for clapping watt laser is logical as the BELLA in Lawrence Berkeley National laboratory at present
Often only tens watts.
Pulse pile-up amplifying technique be in time by pulse-spreading at a series of train of pulse peak work is effectively reduced
Train of pulse is piled into the pulse of high-energy by rate again after amplification.Pulse pile-up amplifying technique can be in broader time range
Interior Decentralized Impulse energy reduces nonlinear effect, can get higher pulse energy, but equally to the promotion of mean power very
It is limited.
Mode locking optics coherence tomography technology is to amplify multichannel mode-locked laser respectively, then passes through spectrum and phase controlling
Technology, the road Shi Ge coherent superposition are final to can get compared with high energy and higher mean power.The deficiency of the technology is to join
Laser with synthesis is still mode-locked laser, so the available mean power of single channel mode-locked laser is limited.Obtain Gao Ping
The number that the mode-locked laser of equal power then needs to synthesize is more, and system is very huge, and the optics coherence tomography technology of mode-locked laser compared with
For complexity, control precision is higher, and number excessively then realizes that difficulty is very huge, has experimentally just reached 8 optical fiber synthesis at present
For 1kW, 1mJ.
Summary of the invention
The purpose of the present invention is to provide it is a kind of based on frequency comb locking high-average power mode-locked laser generation system and
The mean power of mode-locked laser can be substantially improved in method.
Realize the object of the invention technical solution are as follows: a kind of high-average power mode-locked laser generation system based on frequency comb locking
System, including a continuous laser seed source, a laser beam splitter unit, the carrier wave shift frequency unit of several parallel connections, several parallel connections phase
Lock cell, several parallel connections high power continuous laser amplifying unit, heterodyne light beam synthesis unit and frequency comb laser cell；Swash
The equal multi-path laser of the continuous laser beam splitting success rate that beam splitter emits laser seed source；Carrier wave shift frequency unit is by beam splitting
The road Hou Ge laser carries out shift frequency, obtains the laser that carrier frequency is in arithmetic progression distribution, frequency tolerance is the optical frequency to be locked
Comb laser comb teeth frequency interval；Each PGC demodulation unit is by the PGC demodulation of each road laser to corresponding frequency comb laser comb teeth
Phase；The laser of one carrier frequency is carried out high power laser light amplification by each high power continuous laser amplifying unit；Heterodyne light beam
Synthesis unit carries out heterodyne to amplified each road laser and closes beam；The frequency comb laser of frequency comb laser cell transmitting is beamed into
Multichannel identical with continuous laser, and each road laser comb teeth to be locked is extracted, according to each road laser and corresponding comb interference of tooth
Effect feedback control carrier wave shift frequency unit and PGC demodulation unit, the frequency and PGC demodulation of the road Shi Ge laser are in corresponding comb teeth
On.
Using above system, using narrow-band-filter device for extracting the frequency comb laser comb teeth to be locked.
Using above system, the interference signal of each road continuous laser and corresponding comb teeth is detected using photodetector.
Using above system, the laser of laser seed source transmitting is single-frequency or narrow linewidth continuous laser.
Using above system, the carrier frequency separation of every Shu Jiguang is usually in KHz to GHz magnitude.
The high-average power mode-locked laser production method of system as described above, comprising: by continuous kind of single-frequency or narrow linewidth
Seed laser carries out multichannel beam splitting；The laser of each road-load wave frequency rate is subjected to independent high power continuous laser amplification；By optical frequency
Laser beam splitter is combed into multi beam identical with continuous laser number, and extracts each road laser with corresponding narrow-band filter means and is intended to lock
Frequency comb laser comb teeth, make extract each road frequency comb laser comb teeth carrier frequency in arithmetic progression distribution；Amplify from each road
Beam splitting goes out weaker laser all the way and is interfered with corresponding frequency comb laser comb teeth in continuous laser afterwards, uses photodetector
Detection interference signal is simultaneously filtered, will be each for the carrier wave shift frequency unit and PGC demodulation unit on each road of feedback control
On frequency and phase all accurate locks to corresponding frequency comb laser comb teeth of road laser；Frequency, PGC demodulation and power are put
The road great Ge laser carries out heterodyne and closes beam, generates high-average power mode-locked laser.
Using the above method, the road power amplification Qian Duige laser proceeds as follows: the light path for controlling corresponding road laser makes
The equivalent optical path of each road laser；The polarization state for controlling the road the polarization state Shi Ge laser of corresponding road laser is consistent.
The invention will be further described with reference to the accompanying drawings of the specification.
Detailed description of the invention
Fig. 1 is the optic fibre light path schematic diagram of present system.
Fig. 2 is the space optical path schematic diagram of present system.
Fig. 3 is method flow schematic diagram of the invention.
Fig. 4 is that the laser longitudinal module of resonant cavity selects schematic diagram, wherein the longitudinal mode schematic diagram of (a) for resonant cavity, (b) is laser
Gain and loss spectra schematic diagram, (c) for round-trip one week in resonant cavity and gain is greater than the longitudinal mode schematic diagram being lost.
Fig. 5 be longitudinal mode random superposition schematic diagram, wherein (a) be 5 light longitudinal mode random phases superposition each longitudinal mode carrier wave and
Superimposed light intensity schematic diagram is (b) that each longitudinal mode carrier wave of 7 light longitudinal mode random phases superpositions and superimposed light intensity are illustrated
Figure is (c) each longitudinal mode carrier wave and superimposed light intensity schematic diagram of the superposition of 9 light longitudinal mode random phases.
Fig. 6 is the superposition schematic diagram that longitudinal mode is locked to zero phase, wherein (a) is that 5 light longitudinal modes are locked to each of zero phase
Longitudinal mode carrier wave and superimposed light intensity schematic diagram (b) are locked to each longitudinal mode carrier wave of zero phase and superimposed for 7 light longitudinal modes
Light intensity schematic diagram is locked to each longitudinal mode carrier wave and superimposed light intensity schematic diagram of zero phase (c) for 9 light longitudinal modes.
Specific embodiment
Laser and laser mode locking technology of the present invention does description below.
1, continuous laser
The laser seed source used in the present invention is different from the shorter laser of pulse width in the prior art, but uses
The spectrum for exporting laser has the continuous laser of single-frequency or narrow linewidth characteristic.
The working principle of continuous wave laser is: under the action of external source, the light wave that gain media generates can be
Roundtrip between former and later two hysteroscopes of resonant cavity.On laterally (perpendicular to the direction of laser transmission), the only direction of propagation
It is parallel to the light wave of resonance cavity direction, can just pass repeatedly through gain media, is persistently amplified, the light in other directions is by repeatedly anti-
Hysteroscope will be gradually deflected away from after penetrating, is finally depleted, and cannot be stabilized.Therefore, resonant cavity, which plays, horizontally selects light
The effect of the spatial model of beam, i.e. transverse mode selection.Secondly, in the longitudinal direction (direction for being parallel to laser transmission), only meeting standing wave
The light wave of condition can be just stabilized, and therefore, resonant cavity also plays modeling effect, i.e. longitudinal mode selection, such as Fig. 4 (a) in the longitudinal direction
It is shown.
The longitudinal mode for finally capableing of starting of oscillation in resonant cavity is also related with the loss of bandwidth resonant cavity of gain media.Gain is situated between
There are certain gain bandwidths for matter, only the longitudinal mode within the scope of gain bandwidth, are possible to be amplified, in Fig. 4 (b)
Bold portion.There is the longitudinal mode that round-trip gain in one week is greater than loss in resonant cavity that can just be progressively amplified, ultimately form laser,
Such as Fig. 4 (c).
The light field of any one longitudinal mode can be expressed as
Wherein, Em、fm、km、It is amplitude, the frequency, wave mistake, initial phase of m-th of longitudinal mode respectively, L is Resonant Intake System
Degree, c is the light velocity, km=2 π nmfm/ c, nmFor the refractive index of m-th of longitudinal mode.
The light field of laser output is the superposition of the longitudinal mode light field of all starting of oscillations, is expressed as
Wherein, fm=f0+ m Δ f, f0For centre carrier frequency, by kmExpression formula substitutes into formula (2) and obtains
The initial phase of each longitudinal mode light field of general laser is independent of one another, is in random distribution, each longitudinal mode light field cannot
Form effective coherent superposition, the laser energy of final output is in continuously distributed, therefore referred to as continuous laser in time.Such as figure
Shown in 5, phase random distribution will lead to that carrier wave direction of vibration is disorderly and unsystematic, can not form lasting coherent enhancement or weakening.Even
The light intensity of continuous laser locally can also have certain random fluctuation.This random fluctuation, can with the increase of longitudinal mode number and
It is gradually reduced.The light intensity of continuous light is the superposition of each longitudinal mode light intensity, if each longitudinal mode light intensity is equal, final continuous laser is averaged
Light intensity is NI0, wherein N is longitudinal mode number, I0For longitudinal mode light intensity.
2, laser mode locking
It, then can be with so that have determining phase relation between each longitudinal mode when taking laser special modulation means
Make to generate coherent superposition between each longitudinal mode, generate ultrashort laser pulse, this technology is known as laser mode locking technology.
Assuming that the initial phase of each longitudinal mode is all locked to zero phase, i.e.,Then formula (3) can be written as
Enable the amplitude of each longitudinal mode equal, i.e. Em=E0, can be obtained using Euler's formula exp (jx)=cos (x)+jsin (x)
Cos (x)=Re [exp (jx)], j are imaginary symbols, and Re is the operator for taking real part, then formula (4) can be written as
Utilize the sum formula of geometric progressionThe amplitude expression formula of light field can be acquired
Light intensity is laying flat for light wave electric field amplitude mode, for the specific position of laser resonant cavity, such as z=0, then
As shown in fig. 6, light intensity waveform is periodically pulsing sequence when multiple longitudinal modes are locked in zero phase.Pulse period
It is the inverse of longitudinal mode spacing, i.e. Tr=1/ Δ f=2L/c, that is, laser time needed for round trip in resonant cavity.Arteries and veins
Width is rushed to reduce, t available by formula (7) with the increase of longitudinal mode numberp=1/N Δ f=Tr/ N, i.e. pulse width
It is also the 1/N of laser pulse period for the inverse of laser longitudinal module total bandwidth.The peak light intensity of pulse is N2I0, more flat than continuous light
Equal light intensity is N times high.It can be seen that laser longitudinal module quantity is more, pulse width is shorter, and peak value is higher.
In conjunction with Fig. 1, a kind of high-average power mode-locked laser generation system based on frequency comb locking, including a continuous laser
Seed source, a laser beam splitter unit, the carrier wave shift frequency unit of several parallel connections, the PGC demodulation unit of several parallel connections, several parallel connections
High power continuous laser amplifying unit, heterodyne light beam synthesis unit and frequency comb laser cell.Laser beam splitter unit is by laser
The continuous laser of seed source transmitting is divided into the equal laser of multichannel power；Carrier wave shift frequency unit carries out beam splitting Hou Ge road laser
Shift frequency obtains the laser that carrier frequency is in arithmetic progression distribution, and tolerance is the frequency comb laser comb teeth frequency interval to be locked；
Each PGC demodulation unit is by the PGC demodulation of each road laser to the phase of corresponding frequency comb laser comb teeth；Each high power is continuous
The laser of one carrier frequency is carried out high power amplification by laser amplifier unit；Heterodyne light beam synthesis unit to amplified laser into
Row heterodyne closes beam；The frequency comb laser of frequency comb laser cell transmitting is beamed into multichannel identical with continuous laser, and extracts
Each road laser comb teeth to be locked, according to the interference effect of each road laser and corresponding comb teeth, feedback control carrier wave shift frequency unit and
PGC demodulation unit, the frequency and PGC demodulation of the road Shi Ge laser are on corresponding comb teeth.
The laser seed source used in the present invention is different from the shorter laser of pulse width in the prior art, but uses
The spectrum for exporting laser has the continuous laser of single-frequency or narrow linewidth characteristic.Single-frequency or narrow linewidth continuous laser not only can be effective
Reduce the limitation to power ascension of laser medium nonlinear effect and damage, and can provide more pure frequency content and
Longer laser coherence length, convenient for subsequent efficient heterodyne synthesis.
By single-frequency or the continuous seed laser beam splitter of narrow linewidth and shift frequency, it is distributed with obtaining multichannel carrier frequency in arithmetic progression
Continuous laser, similar to multiple longitudinal modes of traditional mode-locked laser, but have essential difference, the main distinction is different frequency
Continuous laser can be separated from each other, and carried out high power amplification for subsequent branch and provided possibility.
The heterodyne light beam synthesis used in the present invention has similarity with existing optics coherence tomography, Spectral beam combining, but exists
It is essential different.Firstly, the carrier frequency for participating in the road heterodyne He Shuge laser is different, and each road laser of usually coherently combined carries
Wave frequency rate is identical；Secondly, the carrier frequency separation for participating in every road laser of heterodyne synthesis is relatively small, much smaller than spectrum beam combination
Frequency interval corresponding to every road wavelength interval.The frequency interval of heterodyne synthesis is usually in KHz to GHz magnitude, and Spectral beam combining
The corresponding wavelength interval of technology is in sub- nm to nm magnitude, and corresponding frequency interval is usually in sub- THz to THz magnitude.
In conjunction with Fig. 1, wherein ISO is optoisolator, and 1 × N is multichannel beam splitter, and FS is acousto-optic frequency shifters, and DL is light delay
Line, PM are phase-modulator, and PC is Polarization Controller, and Amp is image intensifer, and BC is bundling device, and BS is beam splitter, and BP is narrowband
Optical filter, PD are photodetector, and CCD is CCD camera.Optoisolator is located at single-frequency laser (single frequency
Laser) in the optical path of emitted laser.Multichannel beam splitter is located in the optical path of optoisolator rear end.Carrier wave shift frequency unit is sound
Optical frequency shifter, N number of acousto-optic frequency shifters are located in each different light paths of multichannel beam splitter rear end, each acousto-optic frequency shifters rear end light
Road sets gradually optical delay line, phase-modulator, Polarization Controller and image intensifer, and N number of image intensifer will be after power amplification
Laser conjunction beam is carried out in bundling device.Wherein, optical delay line controls the light path phase of the road the light path Shi Ge laser of corresponding road laser
Deng；Phase-modulator locks the phase of each road laser to setting value；The polarization state that Polarization Controller controls corresponding road laser makes respectively
The polarization state of road laser is consistent；Image intensifer amplifies the power of corresponding road laser.Frequency comb laser (Frequency
Comb Laser) the frequency comb laser of transmitting is beamed into multichannel identical with continuous laser, and it extracts each road laser and is intended to lock
Comb teeth, according to each road continuous laser and corresponding frequency comb laser comb interference of tooth signal, feedback control carrier wave shift frequency unit and
PGC demodulation unit, the frequency and PGC demodulation of the road Shi Ge laser are on corresponding comb teeth.
The narrow-band-filter device of every road transport specific band extracts each road comb teeth to be locked, then respectively with each road
Laser after carrier wave shift frequency, phase-modulation, power amplification detects interference signal through being interfered, with photodetector, and to spy
Survey signal is filtered equal signal processings, and processing result is used for the frequency shifter and phase-modulator on each road of feedback control.
In order to monitor and optimize laser mode locking effect, separated from the high-average power mode-locked laser of generation weaker a branch of
Laser measures its waveform using photodetector, is used for feedback control fibre delay line, phase-modulator, Polarization Controller etc.,
The effect for closing beam to difference interference optimizes.The space coincidence degree of light beam can also be monitored with CCD camera.
In conjunction with Fig. 2, multichannel beam splitter is made of several beam splitters and reflecting mirror, and wherein optoisolator rear end is arranged first point
Continuous laser is divided into two beams by Shu Jing, and the first beam is refracted in first via acousto-optic frequency shifters by the first reflecting mirror, other each beams
It is refracted into and is removed in last acousto-optic frequency shifters all the way by subsequent beam splitter, it is last a branch of laggard by the refraction of the second reflecting mirror
Enter in last acousto-optic frequency shifters all the way.Beam splitter is set after bundling device, sub-fraction laser beam splitter is used for optimizing detection
It uses, setting lens are focused laser after beam splitter, and the laser after focusing is transmitted to CCD phase by beam splitter, a part
Machine, another part are transmitted to photodetector.The waveform of the mode-locked laser pulse of photodetector measurement synthesis, for feeding back control
Fibre delay line processed, phase-modulator, Polarization Controller etc., the effect for closing beam to difference interference optimize；CCD camera monitoring
The space coincidence degree of light beam.
In conjunction with Fig. 3, a kind of high-average power mode-locked laser production method based on frequency comb locking, comprising the following steps:
Step 1, the continuous laser of the single-frequency or narrow linewidth that single-frequency or narrow linewidth laser are issued, with laser beam splitter point
Behind the equal road N of success rate, every road laser is allowed successively to adjust carrier frequency by acousto-optic frequency shifters respectively, optical delay line control is each
Road equivalent optical path, phase-modulator control phase, and the road Polarization Controller Shi Ge laser polarization direction is consistent, the narrow line of high power
Wide laser amplifier promotes the power of each road laser.
Step 2, with beam splitter respectively from each road high power narrow linewidth continuous laser obtained through step 1, power-take-off
Lesser beam of laser is used to carry out frequency and PGC demodulation with the corresponding comb teeth of frequency comb laser.
Step 3, the frequency comb laser that frequency comb laser generates, is divided into the road N with beam splitter, every road transport specific band
Narrow-band-filter device extracts each road comb teeth to be locked, and is then interfered respectively with the laser obtained through step 2, uses
Photodetector detects interference signal, and is filtered to detectable signal and waits signal processings, and processing result is each for feedback control
The frequency shifter and phase-modulator on road, the frequency and phase of the road Shi Ge laser are locked on corresponding comb teeth simultaneously.
Step 4, each road obtained after step 3 processing is had to the high power single-frequency or narrow linewidth at fixed frequency interval
Continuous laser, by light beam beam merging apparatus, the road Shi Ge light beam is spatially highly overlapped, and carries out multiple beam difference interference, is generated
The mode-locked laser pulse sequence of high-average power.
Step 5, the high-average power mode-locked laser obtained after step 4 processing is separated with laser beam splitter weaker
It is a branch of, for monitoring the effect of heterodyne synthesis.The waveform that the mode-locked laser pulse of synthesis can be measured with photodetector, for anti-
Feedback control fibre delay line, phase-modulator, Polarization Controller etc., the effect for closing beam to difference interference optimizes.It can be with
With the space coincidence degree of digital image sensor monitoring light beam.
Claims (9)
1. a kind of high-average power mode-locked laser generation system based on frequency comb locking, which is characterized in that continuous sharp including one
If light seed source, a laser beam splitter unit, the carrier wave shift frequency unit of several parallel connections, several parallel connections PGC demodulation unit, dry doubling
High power continuous laser amplifying unit, heterodyne light beam synthesis unit and the frequency comb laser cell of connection；Wherein
The single-frequency that laser seed source emits or narrow linewidth continuous laser are divided into the equal several beams of power by laser beam splitter unit；
The carrier frequency and phase height for each frequency comb teeth that frequency comb laser cell generates are stable and meet mode locking condition,
And as the reference standard of each road continuous laser locking；
Each carrier wave shift frequency unit and PGC demodulation unit will be locked to respectively per the carrier frequency and phase of continuous laser all the way
On the equal comb teeth of frequency comb laser carrier frequency interval；
The laser of one carrier frequency is carried out the amplification of high power continuous laser by each high power continuous laser amplifying unit；
Heterodyne light beam synthesis unit carries out heterodyne to amplified each road laser and closes beam.
2. system according to claim 1, which is characterized in that extract the phase in frequency comb laser using narrow-band-filter device
Answer frequency comb teeth.
3. system according to claim 1, which is characterized in that use a comb teeth of photodetector detection frequency comb laser
With the interference signal of corresponding road continuous laser.
4. system according to claim 1, which is characterized in that the laser of laser seed source transmitting is that single-frequency or narrow linewidth connect
Continuous laser.
5. system according to claim 1, which is characterized in that the carrier frequency separation of every Shu Jiguang is usually in KHz
To GHz magnitude.
6. system according to claim 1, which is characterized in that carrier wave shift frequency unit includes acousto-optic frequency shifters, every road acousto-optic
The shift frequency amount of frequency shifter is distributed in arithmetic progression, and tolerance is equal to the comb teeth frequency interval for the frequency comb laser to be locked.
7. system according to claim 1, which is characterized in that further include optical delay line, polarization control unit, and by they
It is arranged in the optical path before high power continuous laser amplifying unit；
Optical delay line controls the equivalent optical path of the road the light path Shi Ge laser of corresponding road laser；
The polarization state that polarization control unit controls the road the polarization state Shi Ge laser of corresponding road laser is consistent.
8. a kind of high-average power mode-locked laser generation side of the frequency comb laser comb teeth locking based on system described in claim 1
Method characterized by comprising
By the equal multi-path laser of the continuous seed laser beam splitter success rate of single-frequency or narrow linewidth；
Then, the carrier frequency of each road laser and phase are locked to the equal comb teeth of frequency comb laser carrier frequency interval respectively
On；
The continuous laser of each carrier frequency is subjected to the amplification of high power continuous laser again；
Finally, carrying out heterodyne to the continuous laser of amplified each carrier frequency closes beam, high-average power mode-locked laser is generated.
9. according to the method described in claim 8, it is characterized in that, the road power amplification Qian Duige laser proceeds as follows:
Control the equivalent optical path of the road the light path Shi Ge laser of corresponding road laser；
The polarization state for controlling the road the polarization state Shi Ge laser of corresponding road laser is consistent.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110895339A (en) * | 2019-11-01 | 2020-03-20 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
| CN111901042A (en) * | 2020-08-11 | 2020-11-06 | 中国电子科技集团公司第四十四研究所 | Phase modulation-based large dynamic signal demodulation model method |
| CN112146592A (en) * | 2020-09-22 | 2020-12-29 | 中国科学院微电子研究所 | Micro-nano device surface contour line on-line measuring device and method based on optical frequency comb |
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| CN106019763A (en) * | 2016-05-10 | 2016-10-12 | 西北大学 | All-fiber continuous light and optical frequency comb locking device |
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| CN103022877A (en) * | 2012-11-28 | 2013-04-03 | 广东汉唐量子光电科技有限公司 | Novel method for realizing spectral combination amplification based on frequency division multiplexing technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN111901042A (en) * | 2020-08-11 | 2020-11-06 | 中国电子科技集团公司第四十四研究所 | Phase modulation-based large dynamic signal demodulation model method |
| CN111901042B (en) * | 2020-08-11 | 2022-03-11 | 中国电子科技集团公司第四十四研究所 | Phase modulation-based large dynamic signal demodulation model method |
| CN112146592A (en) * | 2020-09-22 | 2020-12-29 | 中国科学院微电子研究所 | Micro-nano device surface contour line on-line measuring device and method based on optical frequency comb |
| CN112146592B (en) * | 2020-09-22 | 2022-04-22 | 中国科学院微电子研究所 | Micro-nano device surface contour line on-line measuring device and method based on optical frequency comb |
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