CN110429462A - A kind of ultra-short pulse laser light source - Google Patents
A kind of ultra-short pulse laser light source Download PDFInfo
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- CN110429462A CN110429462A CN201910586462.9A CN201910586462A CN110429462A CN 110429462 A CN110429462 A CN 110429462A CN 201910586462 A CN201910586462 A CN 201910586462A CN 110429462 A CN110429462 A CN 110429462A
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- H—ELECTRICITY
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- 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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06712—Polarising fibre; Polariser
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- 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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
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- 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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- 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
- H01S3/08009—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection using a diffraction grating
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- H—ELECTRICITY
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- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
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- H—ELECTRICITY
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- 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
- H01S3/10053—Phase control
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- 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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
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- H—ELECTRICITY
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
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Abstract
The invention discloses a kind of ultra-short pulse laser light sources.The light source uses principal and subordinate's laser of the inclined structure of all risk insurance, and the polarization state for benefiting from wherein polarization maintaining optical fibre is stablized, and the strong antijamming capability of principal and subordinate's laser can be made, and realizes long-time steady operation；Principal and subordinate's laser is passive and synchronous using the pouring-in full light of principal and subordinate, eliminates electronics device and complicated feedback control, can obtain the precise synchronization of femtosecond magnitude；Using grating to carrying out dispersion measure in control chamber in principal and subordinate's laser chamber, accurate time-frequency domain can be carried out to synchronous light source to control, the fine adjustment to output pulse width and spectrum width may be implemented, and then optimize nonlinear conversion efficiency, capacity usage ratio is improved, the laser output of higher power is obtained.
Description
Technical field
The present invention relates to laser technology, in particular to a kind of mid-infrared ultra-short pulse laser light source.
Background technique
Mid and far infrared wave band not only includes the characteristic spectral line of many important molecule vibrational-rotational level transition, is the fingerprint light of molecule
Area is composed, and covers the transmission window of earth atmosphere, in material processing, spectrographic detection, infrared remote sensing, health care, spectrum point
The fields such as analysis, military confrontation and atmospheric communication have important application value and prospect.
In recent years, solid state laser is quickly grown, but the gain media of laser emission is directly generated in middle infrared band
Nevertheless suffer from considerable restraint.Therefore, the method that nonlinear optical frequency is converted to infrared generation in being applied to is come into being, such as
Optical parametric oscillator (OPO), optically erasing (OPA) and difference frequency generate (DFG) etc..Wherein, DFG is a kind of efficient and has much
The technology of competitiveness, process do not need resonant cavity, also without higher thresholds required for parametric process, and output wavelength broadband
Tunable, structure is simple, stable.
In the above method, it is crucial for how obtaining the two-color laser light source of two time synchronizations.The prior art passes through two kinds
Mode obtains synchronous light source, one is obtaining stable lock-out pulse by intensity modulated continuous light source, but is constrained to adjust
Device bandwidth processed, the pulse that this mode exports are only nanosecond order, can not generate the ultrashort pulse of subpicosecond magnitude；Another kind is
Two independent ultrashort pulse lasers can be synchronized by phaselocked loop feedback technique, but are to rely on complicated control system, easily
It is influenced by devices such as photodetector, frequency mixer, filters, synchronous operation steady in a long-term can not be obtained.
In addition, the existing all-optical methods based on super continuous spectrums broadening, can be avoided above-mentioned problem, obtain high stable
Motor synchronizing ultrashort pulse output, but this method is faced with the problems such as spectral concentration is low and coherence is poor.
Therefore, develop it is a kind of have many advantages, such as longtime running, polarization-stable, time-frequency domain control, in strong antijamming capability
Infrared excess short-pulse laser source is the research puzzle currently urgently broken through.
Summary of the invention
It is an object of the present invention in view of the above-mentioned problems, provide a kind of mid-infrared ultra-short pulse laser light source, the light source
Has many advantages, such as longtime running, polarization-stable, time-frequency domain control, strong antijamming capability.
For this purpose, provide a kind of mid-infrared ultra-short pulse laser light source, including main laser, from laser and second order non-linear
Property medium, main laser output pumping light pulse and from laser output ideler frequency light pulse meet at second nonlinear medium
In, thus infrared ultrashort pulse in generating；Pumping light pulse is split inside main laser, a part of pulse after beam splitting
The as described pumping light pulse exported from laser；There is non-linear loop mirror, the ideler frequency light pulse and master from laser
Another part pulse after laser beam splitting is injected in the loop mirror respectively；It is serially connected with and is used in the inside optical path of loop mirror
The phase-shifter of phase difference between pulse clockwise and pulse counterclockwise in loop mirror is provided；
Have in the incidence end optical path of loop mirror for adjust the grating of intra-cavity dispersion to, repeat for adjusting laser pulse
The delayer of frequency and for pulse to be reflected back the reflecting mirror in loop mirror enters the incidence end light from the internal optical path
The pulse on road sequentially passes through grating to being reflected after, delayer from reflecting mirror, or sequentially passes through delayer, grating to rear by from anti-
Penetrate mirror reflection；
In main laser, from laser and its between the two, the optical fiber being connected between each device is polarization-maintaining light
It is fine.
Further, the ultrashort pulse be in infrared ultrashort pulse；
Further, main laser is equal with the pulse width exported from both lasers；
Further, the interior lights road of loop mirror has noise pulse, has in the incidence end optical path of loop mirror and is used for
It controls from the tunable optic filter (206) of laser output bandwidth and central wavelength, noise pulse is from tunable optic filter
(206) and grating is to becoming the ideler frequency light pulse and realize that the pulse width is equal under the collective effect of (207)；
Further, outside except no-delay device in incidence end optical path, the internal structure of main laser with out of laser
Portion's structure is identical；
Further, gain fibre is serially connected in the loop mirror of main laser；
Further, gain fibre is specifically er-doped single-mode polarization maintaining fiber；
Further, according to the optical path difference compensated required for δ L=c/fr1-c/fr2 computation delay device (208), wherein c is
The light velocity, fr1 are the pulse recurrence frequency for pumping light pulse, and fr2 is the pulse recurrence frequency of ideler frequency light pulse；
Further, the main laser or going out from optical channel equipped with optical fiber laser amplifier from laser.
The utility model has the advantages that
1, using principal and subordinate's laser of the inclined structure of all risk insurance, the polarization state for benefiting from wherein polarization maintaining optical fibre is stablized, and can make principal and subordinate
Laser can resist the influence to polarization of temperature change, air pressure change, air vibration, it can be achieved that long-time steady operation, and
Realize infrared ultrafast pulse output in high polarization contrast；
2, principal and subordinate's laser is passive and synchronous using the pouring-in full light of principal and subordinate, eliminates electronics device and complicated feedback control
System, can obtain the precise synchronization of femtosecond magnitude；
3, it uses grating to dispersion measure in control chamber is carried out in principal and subordinate's laser chamber, accurate time-frequency can be carried out to synchronous light source
Domain control may be implemented the fine adjustment to output pulse width and spectrum width, and then optimize nonlinear conversion efficiency, improve
Capacity usage ratio obtains the mid-infrared laser output of higher power.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings, but the embodiment in attached drawing is not constituted to any limit of the invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the light path schematic diagram of mid-infrared ultra-short pulse laser light source of the invention.
Specific embodiment
The invention will be further described with the following Examples.
Mid-infrared ultra-short pulse laser light source as shown in Figure 1 includes main laser, from laser, delayer, second order non-linear
Property medium and two optical fiber laser amplifiers.A part of impulses injection of main laser output generates non-linear out of laser chamber
Cross-phase Modulation obtains lock-out pulse.Main laser another part exports pulse and improves pumping by optical fiber laser amplifier I
The peak power of light pulse improves the peak power of ideler frequency light pulse from laser by optical fiber laser amplifier II.Pump light
Pulse can be precisely coincident in time after delayer with ideler frequency light pulse, thus in second nonlinear medium (this reality
Apply in example using the lithium columbate crystal of periodic polarity reversion) in, it is interacted by nonlinear difference, it is infrared ultrashort in generation
Pulse.
Main laser is mainly by continuous optical pumping source 100, optical fibre wavelength division multiplexer 101, gain fibre 102, fiber beam splitting
Device 103, phase-shifter 104, fiber optic splitter 105, tunable optic filter 106, grating are defeated to 107, reflecting mirror 108 and main laser
109 composition out.Wherein optical fibre wavelength division multiplexer 101, gain fibre 102, fiber optic splitter 103, phase-shifter 104, fiber beam splitting
Device 105 is sequentially connected and end to end, to form a nonlinear amplification loop mirror I.The loop mirror I is that realization is pulse mode-locked
Critical component, be substantially equivalent to the effect of traditional Sagnac interferometer: being run clockwise and anticlockwise in loop mirror I
Pulse by itself pulse characteristic (such as pulse width, spectral shape, pulse energy etc.) with after device sequence it is different,
Cause that there is certain phase difference between them, depending on the size of phase difference, bidirectional pulse can be sent out in fiber optic splitter
Raw interference is mutually long or interferes cancellation.Based on the above principles, stable pulse mode-locked to obtain, continuous optical pumping source 100 can be made
Power increase to more than the modelocking threshold of laser, by optical fibre wavelength division multiplexer 101 inject loop mirror I in, Jin Erzuo
Gain fibre 102 is used, to be randomly formed noise pulse, the noise pulse is probability from logical to the left side of gain fibre 102
Road exports to form pulse counterclockwise or export to form pulse clockwise from the right channel to gain fibre 102.Pulse counterclockwise
During transmission in loop mirror with pulse clockwise, the linear phase shift introduced due to phase delay device 104 can be accumulated,
And bidirectional pulse Self-phase modulation and the nonlinear phase shift that obtains, the two can meet and occur in fiber optic splitter 105
Interference.Since the power of pulse center portion is larger, the two way phase difference accumulated is the integral multiple having close to π or π, because
This portion of energy of this pulse center can largely be projected from 3 channels of fiber optic splitter 105, into the incidence end of loop mirror I
Optical path, and tunable optic filter 106, grating are sequentially passed through to being reflected back in loop mirror I after 107 by reflecting mirror 108, realize iteration
Circulation forms ultrashort infrared pulse under the action of Pulse tuning filter 106 during this, wherein infrared pulse output spectrum
Bandwidth is 5nm, and center wavelength tuning range is 1030-1080nm, and Fourier transformation limited pulses width is about 330fs；Separately
Outer fraction energy is then projected from 4 channels of fiber optic splitter 105, into the exit end optical path of loop mirror I, to be sent to master
Output is realized at laser output 109.Infrared pulse is every in loop mirror I to run a circle (i.e. every iteration is primary), the arteries and veins of pulse
It rushes width to be just narrowed once, in this way, infrared pulse is constantly narrowed during loop iteration, ultimately form ultrashort infrared
Pulse.As long as therefore the number of iterations is more than enough, and the mode locking output of the ultrashort infrared pulse at main laser output 109 can be realized.
It should be noted that phase delay device 104 is for providing between pulse clockwise and pulse counterclockwise in loop mirror
Phase difference reduces the nonlinear phase shift amount of pulse counterclockwise and the pulse clockwise required accumulation in loop mirror, to reduce
The pump power of Mode-locking For Lasers operation.
The pulse of way traffic interferes at fiber optic splitter 105, and guarantee can from laser pulse central part
Reciprocating vibration is formed in laser cavity；
For the edge portions in pulse, since its power is lower, the phase shift accumulated is smaller, and nonlinear phase difference is 0,
Therefore the edge portions of pulse can be reflected back toward in loop mirror I.
In incidence end optical path, grating can be accurately adjusted intra-cavity dispersion amount to 107, to realize the fine of pulse-width
It adjusts.
From laser mainly by continuous optical pumping source 200, optical fibre wavelength division multiplexer 201, gain fibre 202, optical fiber wavelength division
Multiplexer 203, phase-shifter 204, fiber optic splitter 205, tunable optic filter 206, grating are to 207, delayer 208, reflecting mirror
209 and from laser output 210 composition.Wherein optical fibre wavelength division multiplexer 201, gain fibre 202, optical fibre wavelength division multiplexer 203,
Phase-shifter 204, fiber optic splitter 205 constitute loop mirror II.It is stable pulse mode-locked to obtain, it can be by continuous optical pumping source
200 power increases to more than the modelocking threshold of laser, is applied to master gain optical fiber by optical fibre wavelength division multiplexer 201
202, the noise pulse of generation being iterated to penetrating to penetrating in optical path between reflecting mirror 209 and loop mirror.Similarly, noise arteries and veins
It is punched under the restriction of tunable optic filter 206, so that infrared pulse output spectrum bandwidth is 5nm, center wavelength tuning range is
1530-1580nm, Fourier transformation limited pulses width are 700fs.Infrared pulse constantly narrows in loop mirror II, is formed
Ultrashort infrared pulse is finally exported at laser output 210.
It, can be a part after 103 beam splitting of fiber optic splitter in order to realize the passive full phototiming between principal and subordinate's laser
Ultrashort infrared pulse (this partial pulse is referred to as main laser pulse hereinafter) is injected into ring by optical fibre wavelength division multiplexer 203
In road mirror II, so that the slave laser pulse of main laser pulse and a direction (as counterclockwise) is (i.e. in loop mirror II
Pulse) colleague together, during this according to non-linear Schrodinger equation it is found that two pulses gone together together can occur it is non-thread
Sex-intergrade phase-modulation, so that significant nonlinear phase shift is obtained, in this way, can carry out by successive ignition to from laser pulse
Periodic modulation, it is final to obtain synchronous mode locking pulse；And main laser pulse and another direction (as clockwise)
And mistake then opposite from laser pulse, hardly introduces any nonlinear phase shift.
By the periodically pulsing injection of main laser, adjusted without any polarization state i.e. changeable from laser pulse
The nonlinear phase shift accumulated in loop mirror II carries out passive type periodic modulation to from laser pulse to realize, finally
Synchronous mode locking pulse is obtained, realizes the passive full phototiming between principal and subordinate's laser.Since fiber nonlinear effect originates from
Electric susceptibility variation, response speed theoretically can achieve femtosecond magnitude, can obtain ultrashort pulse time-frequency domain precision synchronous.
In order to obtain the better synchronous regime of robustness, light can be increased in main laser and from going out at optical channel for laser
Fine laser amplifier amplifies injected pulse energy.
It should be noted that having additional delayer 208, its role is to compensate master in the incidence end optical path from laser
Optical path difference between laser output pulse, to realize principal and subordinate's laser repetition rate having the same under free-running.
Specific compensatory device can measure main laser output pulse and from laser by frequency counter or Spectrum Analyzer
Pulse recurrence frequency fr1, fr2 for exporting pulse, the optical path difference compensated required for being calculated using δ L=c/fr1-c/fr2,
Middle c is the light velocity.
It should be noted that above, main laser to the fiber lengths between second nonlinear medium is L1, from laser
It is L2 to the fiber lengths between second nonlinear medium, it is contemplated that L1 and L2 may cause length etc. in placement process,
Cause main laser output pulse compared with from laser output pulse sequence, there are overall time translations, therefore in main laser
Rear class add delayer to carry out compensation of delay, with eliminate fiber lengths it is not equal brought by influence.
In main laser and from laser, the connection between each device is all made of polarization maintaining optical fibre, wherein the type of each device
Number, parameter and effect it is specific as follows:
The continuous optical pumping source 100 uses 976nm semiconductor laser in the present embodiment, and output optical fibre is single mode
Polarization maintaining optical fibre；
The optical fibre wavelength division multiplexer 101 uses 976nm/1064nm polarization maintaining optical fibre wavelength division multiplexer in embodiment；
The gain fibre 102 is to mix ytterbium single-mode polarization maintaining fiber, for providing the gain media of main laser；
The fiber optic splitter 103 is the photo-coupler that splitting ratio is 1:9, and output pulse is for injecting from laser；
The phase delay device 104 is used to provide in optical fiber loop mirror the initial phase between optical path clockwise and anticlockwise
Difference can reduce Mode-locking For Lasers threshold value, conducive to the mode locking operating for realizing laser pulse；
The fiber optic splitter 105 is that 2 × 2 photo-coupler that splitting ratio is 5:5 makes for constituting optical fiber loop mirror
It positive must can be interfered with reverse impulse, the nonlinear strength modulation of light pulse be realized, to obtain the narrow of laser pulse
Change；
For controlling main laser output bandwidth and central wavelength, center tuning range is the tunable optic filter 106
1030-1080nm, bandwidth 5nm；
The grating is used for dispersion measure in control chamber to 107, thus the further width of control output pulse；
The continuous optical pumping source 200 uses 976nm semiconductor laser in the present embodiment, and output optical fibre is single mode
Polarization maintaining optical fibre；
976nm/1550m polarization maintaining optical fibre wavelength division multiplexer is used in the optical fibre wavelength division multiplexer 201；
The 202 er-doped single-mode polarization maintaining fiber of gain fibre, for providing the gain media from laser；
The optical fibre wavelength division multiplexer 203 uses 1064nm/1550nm polarization maintaining optical fibre wavelength division multiplexer in the present embodiment,
For providing the port of main laser impulses injection；
The phase delay device 204 can reduce Mode-locking For Lasers threshold for providing initial phase difference in optical fiber loop mirror
Value, conducive to the mode locking operating for realizing laser pulse；
For controlling from laser output bandwidth and central wavelength, center tuning range is the tunable optic filter 206
1530-1580nm, bandwidth 5nm；
The grating is used for dispersion measure in control chamber to 207, to further control output pulse width；
The delayer 208 is automatically controlled fibre delay line, and the chamber for accurately adjusting laser is long, and then completes principal and subordinate and swash
The long fine matching of light device chamber, adjusts the repetition rate of laser pulse.
The mid-infrared ultra-short pulse laser light source based on passive full phototiming of the present embodiment, in conjunction with to ultrashort pulse when
Frequency domain control obtains efficient nonlinear difference in second nonlinear medium and generates, thus infrared ultrashort pulse in obtaining
Output.In addition, the wavelength tuning of principal and subordinate's laser may be implemented using intracavitary tunable filter 106,206, thus realization pair
The wavelength tuning for the mid-infrared laser that difference frequency generates.The all-fiber of entire light-source system can be realized by delayer 208, in turn
The integration and miniaturization for realizing mid-infrared light source, expands it in more applications.Utilize intracavitary tunable optic filter
106,206, come realize to the precision control of principal and subordinate's laser center wavelength, it can be achieved that in infrared 2.9 μm -3.6 μm of tuning model
It encloses.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (9)
1. a kind of ultra-short pulse laser light source, including main laser, from laser and second nonlinear medium, main laser output
Pumping light pulse and from laser export ideler frequency light pulse meet in second nonlinear medium, to generate ultrashort arteries and veins
Punching；It is characterized in that: there is non-linear loop mirror from laser, pumping light pulse is split inside main laser, after beam splitting
A part of pulse be main laser output pumping light pulse, another part pulse and the ideler frequency light after beam splitting
Pulse is injected separately into the loop mirror；Be serially connected in the inside optical path of loop mirror for provide in loop mirror pulse clockwise with
The phase-shifter (204) of phase difference between pulse counterclockwise；Have in the incidence end optical path of loop mirror for adjusting intra-cavity dispersion
Delayer (208) of the grating to (207), for adjusting laser pulse repetition frequency and for pulse to be reflected back in loop mirror
Reflecting mirror (209), the pulse for entering the incidence end optical path from the internal optical path sequentially pass through grating to (207), delayer
(208) it is reflected after from reflecting mirror, or sequentially passes through delayer (208), grating to being reflected after (207) from reflecting mirror；In master
In laser, from laser and its between the two, the optical fiber being connected between each device is polarization maintaining optical fibre.
2. ultra-short pulse laser light source according to claim 1, it is characterized in that the ultrashort pulse be in infrared ultrashort arteries and veins
Punching.
3. ultra-short pulse laser light source according to claim 1, characterized in that main laser is exported with from both lasers
Pulse width it is equal.
4. ultra-short pulse laser light source according to claim 3, characterized in that the interior lights road of loop mirror has noise
Pulse has for controlling the tunable optic filter from laser output bandwidth and central wavelength in the incidence end optical path of loop mirror
(206), noise pulse from tunable optic filter (206) and grating to the collective effect of (207) under become the ideler frequency light arteries and veins
It rushes and realizes that the pulse width is equal.
5. ultra-short pulse laser light source according to claim 3, characterized in that except no-delay device in incidence end optical path
Outside, the internal structure of main laser is identical as the internal structure from laser.
6. ultra-short pulse laser light source according to claim 5, characterized in that be serially connected with increasing in the loop mirror of main laser
Beneficial optical fiber.
7. ultra-short pulse laser light source according to claim 6, characterized in that gain fibre is specifically er-doped single mode polarization-maintaining
Optical fiber.
8. short-pulse laser source according to claim 1, characterized in that according to δ L=c/fr1-c/fr2 computation delay
The optical path difference compensated required for device (208), wherein c is the light velocity, and fr1 is the pulse recurrence frequency for pumping light pulse, and fr2 is ideler frequency
The pulse recurrence frequency of light pulse.
9. ultra-short pulse laser light source according to claim 1, characterized in that the main laser or going out from laser
Optical fiber laser amplifier is equipped at optical channel.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745953A (en) * | 2021-09-10 | 2021-12-03 | 上海理工大学 | Method for reducing mode locking threshold of laser by injecting synchronous optical pulse |
| CN117631629A (en) * | 2023-12-01 | 2024-03-01 | 上海频准激光科技有限公司 | Laser control system based on simulation processing |
| CN117631629B (en) * | 2023-12-01 | 2024-06-07 | 上海频准激光科技有限公司 | Laser control system based on simulation processing |
-
2019
- 2019-07-01 CN CN201910586462.9A patent/CN110429462A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745953A (en) * | 2021-09-10 | 2021-12-03 | 上海理工大学 | Method for reducing mode locking threshold of laser by injecting synchronous optical pulse |
| CN113745953B (en) * | 2021-09-10 | 2023-12-12 | 上海理工大学 | Method for reducing mode locking threshold of laser by injecting synchronous light pulse |
| CN117631629A (en) * | 2023-12-01 | 2024-03-01 | 上海频准激光科技有限公司 | Laser control system based on simulation processing |
| CN117631629B (en) * | 2023-12-01 | 2024-06-07 | 上海频准激光科技有限公司 | Laser control system based on simulation processing |
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Application publication date: 20191108 |