CN109802283A - A kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse and method - Google Patents
A kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse and method Download PDFInfo
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- CN109802283A CN109802283A CN201910030334.6A CN201910030334A CN109802283A CN 109802283 A CN109802283 A CN 109802283A CN 201910030334 A CN201910030334 A CN 201910030334A CN 109802283 A CN109802283 A CN 109802283A
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Abstract
The present invention provides a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse and methods, belong to technical field of ultrafast laser.Described device includes optical fiber laser with active-passive lock mould, negative dispersion chirped fiber grating, positive dispersion nonlinear passive optical fiber, positive dispersion fiber amplifier, dispersion compensator.Optical fiber laser with active-passive lock mould generates ultrashort laser pulse, the pulse becomes the ultrashort laser pulse with negative chirp by negative dispersion chirped fiber grating, ultrashort laser pulse with negative chirp is coupled into positive dispersion nonlinear optical fiber, form the ultrashort laser pulse of triangle narrowband, the ultrashort laser pulse of triangle narrowband, which is coupled into positive dispersion fiber amplifier, completes the amplification evolution of pulse self similarity, form parabola shaped wide-band linearity chirped pulse, wide-band linearity chirped pulse enters dispersion compensator, the positive chirp that dispersion compensator compensating wide band linear-chirped-pulse accumulates in self similarity amplification process, obtain the femtosecond laser of Fourier transformation limited pulses quality.
Description
Technical field
The present invention relates to a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse and methods, belong to super
Fast laser technology field.
Background technique
Femtosecond (fs, 10-15S) performances such as the temporal resolution of laser, coherent swpectrum width, peak power, time jitter are equal
Better than conventional laser art, index can be brought to break through for technologies such as range measurement, time-frequency transmitting, Precision Machining, analog-to-digital conversions,
Important application prospect is all had in fields such as geophysical observatory, communication, radar and navigation.Optical fiber femtosecond laser technology can with gram
The inherent shortcomings such as Ti:Sapphire laser fs-laser system pumping source valuableness, environmental requirement harshness, fuel factor are taken, are that femtosecond laser realizes wide
The effective way of general business application.However the elongated waveguiding structure of optical fiber also highlights non-while bringing practical advantage
Laser pulse distortion easily occurs under high-gain operating and even divides for the problems such as linear perturbation is greatly, spontaneous radiation amplification noise is strong
It splits.Self similarity amplification, which refers to that pulse is developed in positive dispersion gain fibre, becomes the parabola shaped pulse with linear chrip, arteries and veins
Peak power, time domain width and the spectrum width of punching prolong fiber lengths and exponential increase are presented, and the shape of pulse keeps parabola shaped
It is constant.Different from the direct nonlinear amplification technology of femtosecond laser and chirp pulse amplification technology, self similarity amplifies skill
Art actively utilizes the nonlinear effect stretched pulse spectrum in optical fiber, and is accumulated pulse amplifying process using positive group velocity dispersion
Phase linearity so that pulse spectrum can be broadened effectively without pulse distortion and division, directly output Gao Gong
The wide spectrum linear chrip parabolic pulses of rate only can need to effectively compress pulse using second-order dispersion compensation, obtain height
The transform limit femto-second laser pulse of quality, this is the most prominent advantage of self similarity amplifying technique.Self similarity amplifying technique is abundant
Advantage of the optical fiber as laser gain medium is utilized, be optical fiber fs-laser system performance boost convenience and effective hand
Section.
Since the gain spectral shape of fiber amplifier is determined by inverted population distribution, in the certain situation of amplifier gain
Under, it is influenced by gain shaping operation, self similarity amplifies the speed to develop and effect and seed pulse wave in a fiber for pulse
The factors such as length and width degree, chirp, shape are closely related.Amplify the influence of evolutionary process to reduce gain shaping operation to self similarity,
Usually there are two types of solutions: one is longer gain fibre is used, so as to improve the gain bandwidth of fiber amplifier, however
When gain fibre is too long, stimulated raman scattering will affect the accumulation of the chirp in amplification process, and then deteriorate compressed
Femto-second laser pulse quality, limitation amplification output femto-second laser pulse energy, and gain fibre is longer, and spontaneous radiation amplification is made an uproar
Sound is bigger；Another solution is using the output solid mode-locked laser oscillator that pulse spectrum shape is smooth, spectrum width is relatively narrow
As seed pulse source, and then reduce the limitation that gain bandwidth develops to the amplification of pulse self similarity indirectly, but the program can not
It realizes all-fiber, reduces the compact sexual clorminance of fibre system.
Summary of the invention
Technology of the invention solves the problems, such as: overcome the deficiencies of the prior art and provide it is a kind of based on triangular pulse passively at
The optical fiber femtosecond laser production method and device of shape shorten self similarity when generating femtosecond laser and amplify required gain fibre length,
And then inhibit stimulated raman scattering disturbance, while reducing the performance requirement to seed light source, realize that generating femtosecond laser produces
The all-fiber and miniaturization of generating apparatus.
The technical solution of the invention is as follows: a kind of optical fiber femtosecond laser generation dress passively shaped based on triangular pulse
It sets, which includes optical fiber laser with active-passive lock mould, negative dispersion chirped fiber grating, positive dispersion nonlinear passive optical fiber, countenance
Astigmatism fiber amplifier, dispersion compensator, in which:
Optical fiber laser with active-passive lock mould, for generating ultrashort laser pulse, and as seed pulse, the seed pulse
The ultrashort laser pulse for having negative chirp, the ultrashort laser pulse coupling with negative chirp are generated by negative dispersion chirped fiber grating
It closes and enters in positive dispersion nonlinear optical fiber, in the positive group velocity dispersion of positive dispersion nonlinear optical fiber and being total to for self phase modulation
Under same-action, the ultrashort laser pulse energy with negative chirp is concentrated to central wavelength, and is compressed simultaneously in time domain and frequency domain
And shaping, the ultrashort laser pulse of triangle narrowband is formed, later, the ultrashort laser pulse of triangle narrowband is coupled into countenance astigmatism
The amplification of pulse self similarity is completed in fiber amplifier to develop, and forms parabola shaped wide-band linearity chirped pulse, wide-band linearity chirp arteries and veins
It rushes in into dispersion compensator, the positive Zhou that dispersion compensator compensating wide band linear-chirped-pulse accumulates in self similarity amplification process
It sings, obtains the femtosecond laser of Fourier transformation limited pulses quality.
The ultrashort laser pulse mean power 60mW~200mW, repetition rate 30MHz~100MHz, central wavelength
1030nm~1050nm, spectrum full width at half maximum degree 5nm~20nm.
The spectrum full width at half maximum degree of triangle narrowband ultrashort laser pulse is less than positive dispersion fiber amplifier gain band
It is wide.
The spectrum full width at half maximum degree of the parabola shaped wide-band linearity chirped pulse is 20nm~50nm.
The optical fiber laser with active-passive lock mould is nonlinear fiber polarization rotation mode-locked laser, optical fiber saturable absorber
Mode-locked laser or nonlinear fiber amplify annular mirror mode-locked laser.
The negative dispersion chirped fiber grating is reflection type optical fiber Bragg grating.
The positive dispersion nonlinear passive optical fiber is single mode optical fiber or photonic crystal fiber.
The positive dispersion fiber amplifier is ytterbium doped optical fiber amplifier.
The grating is reflective gratings to, transmission-type grating pair or volume Bragg grating to dispersion compensator.
Another technical solution of the invention is: a kind of optical fiber femtosecond laser production passively shaped based on triangular pulse
Generation method, this method comprises the following steps:
S1, ultrashort laser pulse is generated；
S2, the step s1 ultrashort laser pulse generated is adjusted to the ultrashort laser pulse with negative chirp；
S3, the ultrashort laser pulse energy with negative chirp is concentrated to central wavelength, while will in time domain and frequency domain
Impulse waveform compression and shaping, form the ultrashort laser pulse of triangle narrowband；
S4, the ultrashort laser pulse of triangle narrowband is carried out to similarity pulse amplification evolution, exports the linear chrip in broadband
Parabola laser pulse；
The positive chirp that s5, cancellation band linear chrip parabola laser pulse accumulate in self similarity amplification process, it is final defeated
Provide the femto-second laser pulse of transform limit quality.
The ultrashort laser pulse mean power 60mW~200mW, repetition rate 30MHz~100MHz, central wavelength
1030nm~1050nm, spectrum full width at half maximum degree 5nm~20nm.
The step s2 is realized using negative dispersion chirped fiber grating.
The spectrum full width at half maximum degree of the parabola shaped wide-band linearity chirped pulse is 20nm~50nm.
The invention has the following advantages over the prior art:
(1), the triangle ultrashort laser arteries and veins that the present invention passes through narrowband pre-generated in positive dispersion nonlinear passive optical fiber
Punching reduces the disturbance that gain shaping develops to self similarity amplification, improves self similarity evolution efficiency of the pulse in fiber amplifier,
Shorten gain fibre length needed for self similarity amplifies, and then inhibit stimulated raman scattering disturbance, obtains high power, low noise
High quality femtosecond laser, while requirement of the self similarity amplifier to seed source can also be reduced, realize self similarity amplification system
All-fiber and miniaturization, structure is simple, easy to operate；
(2), amplifier gain fiber length of the present invention is short, can the high-energy of directly output pulse width hundreds of femtoseconds throw
Object line pulse, progress spectrum widening compression in nonlinear optical fiber can be used directly in by not needing appended time domain compression link,
Its parabolical time-domain shape can guarantee the linear chrip during Spectral Broadening, output high-power, height after compression
Few periodic laser pulse of quality, promotes non-linear chirped system performance index, while realizing non-linear chirped system
The all-fiber of system；
(3), the present invention can provide stable, High Linear chirp degree, light for next stage power amplification and energy amplification
The seed laser pulse of spectrum smoothing promotes the integrated level and stability of optical fiber chirp pulse amplification system.
Detailed description of the invention
Fig. 1 is that the present invention is based on the optical fiber femtosecond laser self similarity amplifier architecture schematic diagrames that triangular pulse passively shapes；
Fig. 2 is that the triangular pulse spectrum that the embodiment of the present invention that experiment measures passively shapes in general single mode fiber is strong
It writes music line；
Fig. 3 be the triangular pulse intensity that is passively shaped in general single mode fiber of the embodiment of the present invention that measures of experiment from
Correlation curve；
Fig. 4 is passively to be shaped in general single mode fiber according to the embodiment of the present invention that Fig. 2 and Fig. 3 data convert obtains
Triangular pulse intensity curve and and fitting triangular pulse intensity curve；In figure: 8 be passively to shape in general single mode fiber
Triangular pulse time domain intensity curve, 9 be fitting triangular pulse intensity curve；
Fig. 5 is ytterbium doped optical fiber amplifier of the embodiment of the present invention output pulse spectrum intensity curve that experiment measures；
Fig. 6 is the pulse strength autocorrelator trace that the grating of the embodiment of the present invention that experiment measures exports dispersion compensator；
Fig. 7 is the pulse exported according to the grating of the embodiment of the present invention that Fig. 3 and Fig. 4 data convert obtains to dispersion compensator
Intensity curve and corresponding Fourier transformation limited pulses intensity curve.In figure: 12 arteries and veins exported for grating to dispersion compensator
Intensity curve is rushed, 13 be Fourier transformation limited pulses intensity curve.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, the optical fiber femtosecond laser generating device provided by the invention passively shaped based on triangular pulse includes:
Optical fiber laser with active-passive lock mould 1, negative dispersion chirped fiber grating 2, positive dispersion nonlinear passive optical fiber 3, positive dispersion fiber amplification
Device 4, dispersion compensator 5.The connection relationship of each component are as follows: 1 output coupling end tail optical fiber of optical fiber laser with active-passive lock mould directly with it is negative
The 2 input terminal welding of dispersion chirped fiber grating, the output end and positive dispersion nonlinear passive optical fiber of negative dispersion chirped fiber grating 2
3 weldings, the output end of positive dispersion nonlinear passive optical fiber 3 directly with the signal input part welding of positive dispersion fiber amplifier 4, just
4 output signal of dispersive optical fiber amplifier is coupled into dispersion compensator 5.
Optical fiber laser with active-passive lock mould 1, for generating ultrashort laser pulse, and as seed pulse, the seed arteries and veins
Punching generates the ultrashort laser pulse for having negative chirp, the ultrashort laser arteries and veins with negative chirp by negative dispersion chirped fiber grating 2
Punching is coupled into positive dispersion nonlinear optical fiber 3, in the positive group velocity dispersion and Self-phase modulation of positive dispersion nonlinear optical fiber 3
Under the collective effect of effect, the ultrashort laser pulse energy with negative chirp is concentrated to central wavelength, and same in time domain and frequency domain
When compressed and shaping, form the ultrashort laser pulse of triangle narrowband, later, the ultrashort laser pulse of triangle narrowband is coupled into
In positive dispersion fiber amplifier 4, in the gain of positive dispersion fiber amplifier, self phase modulation and positive group velocity dispersion
Under effect, complete the amplification of pulse self similarity and develop, form parabola shaped wide-band linearity chirped pulse, wide-band linearity chirped pulse into
Enter dispersion compensator 5, the positive chirp that 5 compensating wide band linear-chirped-pulse of dispersion compensator accumulates in self similarity amplification process,
In time domain data compression pulse, the femtosecond laser of Fourier transformation limited pulses quality is obtained.
Optical fiber laser with active-passive lock mould 1 can choose nonlinear fiber polarization rotation mode-locked laser in actual use
Device, optical fiber saturable absorber mode-locked laser or nonlinear fiber amplify annular mirror mode-locked laser.Negative dispersion chirped fiber
Grating 2 can choose reflection type optical fiber Bragg grating.Positive dispersion nonlinear passive optical fiber 3 can choose general single mode fiber or
Photonic crystal fiber.Positive dispersion fiber amplifier 4 can select ytterbium doped optical fiber amplifier.Grating can select dispersion compensator 5
With reflective gratings to, transmission-type grating pair or volume Bragg grating.
The present invention provides a kind of optical fiber femtosecond laser production method passively shaped based on triangular pulse, this method includes
Following steps:
(1), ultrashort laser pulse is generated；The ultrashort laser pulse mean power 60mW~200mW, repetition rate
30MHz~100MHz, central wavelength 1030nm~1050nm, spectrum full width at half maximum degree 5nm~20nm.
(2), the ultrashort laser pulse that step (1) generates is adjusted to the ultrashort laser pulse with negative chirp；The step
It is realized using negative dispersion chirped fiber grating (2).
(3), the ultrashort laser pulse energy with negative chirp is concentrated to central wavelength, while will in time domain and frequency domain
Impulse waveform compression and shaping, form the ultrashort laser pulse of triangle narrowband；The spectrum of the triangle narrowband ultrashort laser pulse
Full width at half maximum degree is less than positive dispersion fiber amplifier gain bandwidth.
(4), the ultrashort laser pulse of triangle narrowband is carried out similarity pulse amplification to develop, exports the linear chrip in broadband
Parabola laser pulse；
(5), the positive chirp that cancellation band linear chrip parabola laser pulse accumulates in self similarity amplification process, it is final defeated
Provide the femto-second laser pulse of transform limit quality.
Embodiment:
The use nonlinear fiber amplification annular mirror mode-locked laser of optical fiber laser with active-passive lock mould 1, output mean power~
The ultrashort laser pulse sequence of 100mW, repetition rate~50MHz, central wavelength 1030nm~1040nm, spectrum full width at half maximum
Spend 10nm~15nm.The use reflection type optical fiber Bragg grating of negative dispersion chirped fiber grating 2, second-order dispersion 0.15ps/nm~
0.35ps/nm, nonlinear fiber amplify annular mirror mode-locked laser output coupling end tail optical fiber and reflection type optical fiber Bragg grating
Reflection type optical fiber Bradley is passed through in input terminal welding, the ultrashort laser pulse that nonlinear fiber amplifies the output of annular mirror mode-locked laser
The ultrashort laser pulse for having negative chirp is generated after lattice grating.Positive dispersion nonlinear passive optical fiber 3 is commonly single using 1m~1.5m
Mode fiber, the output end welding of the input terminal and reflection type optical fiber Bragg grating of general single mode fiber, reflection type optical fiber Bradley
Positive group velocity dispersion and self phase modulation of the negative chirp ultrashort laser pulse of lattice grating output in general single mode fiber
Under collective effect, pulse energy is concentrated to central wavelength, pulse is compressed and shaping simultaneously in frequency domain and time domain, is tested and is measured
General single mode fiber exports pulse spectrum intensity curve and intensity autocorrelator trace difference is as shown in Figures 2 and 3, according to the experiment
Algorithm is also using PICASO (Phase and Intensity from Correlation and Spectrum only) for data
Original obtains consistency explanation of the corresponding pulse temporal intensity curve as shown in 8 in Fig. 4, with the triangular pulse curve 9 of fitting
Pulse completes the passive forming process of triangular pulse in general single mode fiber.Positive dispersion fiber amplifier 4, which uses, mixes ytterbium light
Fiber amplifier, gain media are 1.5m~2.5m single mode polarization-type Double Cladding Ytterbium Doped Fiber, and 10 μm of fibre core mode field diameter, pumping swashs
Light source is that 976nm fiber coupling exports laser diode, is coupled into pumping laser and triangular pulse using wavelength division multiplexer
Ytterbium doped optical fiber amplifier, controls pump laser source output power, reach in amplifier gain~20dB when amplifier output arteries and veins
It is as shown in Figure 5 to wash spectral intensity curve off.After grating amplifies dispersion compensator 5 using the reflecting grating of 600line/mm to compression
Pulse, the compression pulse strength autocorrelator trace of output is as shown in Figure 6.It is restored using PICASO algorithm and is compressed accordingly
Pulse temporal intensity curve is as shown in 12 in Fig. 7, pulse width~60fs.Pulse spectrum intensity is exported according to amplifier
5 can be fitted to obtain corresponding Fourier transformation limited pulses time domain intensity curve 13, the consistency of curve 13 and curve 12,
Illustrating that pulse only has accumulated linear chrip in ytterbium doped optical fiber amplifier, this is the most typical feature of parabola shaped pulse amplifying,
Illustrate that pulse realizes self similarity amplification, femtosecond laser of the final output with transform limit pulse quality.
The content that description in the present invention is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (13)
1. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse, it is characterised in that passively locked including optical fiber
Mode laser (1), negative dispersion chirped fiber grating (2), positive dispersion nonlinear passive optical fiber (3), positive dispersion fiber amplifier
(4), dispersion compensator (5), in which:
Optical fiber laser with active-passive lock mould (1), for generating ultrashort laser pulse, and as seed pulse, the seed pulse
The ultrashort laser pulse for having negative chirp, the ultrashort laser arteries and veins with negative chirp are generated by negative dispersion chirped fiber grating (2)
Punching is coupled into positive dispersion nonlinear optical fiber (3), in the positive group velocity dispersion of positive dispersion nonlinear optical fiber (3) and from phase tune
Under the collective effect of effect processed, the ultrashort laser pulse energy with negative chirp is concentrated to central wavelength, and in time domain and frequency domain
Compress and shaping simultaneously, formation triangle narrowband ultrashort laser pulse, later, the ultrashort laser pulse of triangle narrowband is coupled into
Enter to complete the amplification of pulse self similarity in positive dispersion fiber amplifier (4) to develop, forms parabola shaped wide-band linearity chirped pulse, it is wide
Band linear-chirped-pulse enters dispersion compensator (5), and dispersion compensator (5) compensating wide band linear-chirped-pulse amplifies in self similarity
The positive chirp accumulated in the process obtains the femtosecond laser of Fourier transformation limited pulses quality.
2. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is the ultrashort laser pulse mean power 60mW~200mW, repetition rate 30MHz~100MHz, central wavelength
1030nm~1050nm, spectrum full width at half maximum degree 5nm~20nm.
3. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is that the spectrum full width at half maximum degree of triangle narrowband ultrashort laser pulse is less than positive dispersion fiber amplifier gain bandwidth.
4. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is that the spectrum full width at half maximum degree of the parabola shaped wide-band linearity chirped pulse is 20nm~50nm.
5. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is that the optical fiber laser with active-passive lock mould (1) is nonlinear fiber polarization rotation mode-locked laser, optical fiber saturable absorption
Body mode-locked laser or nonlinear fiber amplify annular mirror mode-locked laser.
6. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is that the negative dispersion chirped fiber grating (2) is reflection type optical fiber Bragg grating.
7. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is that the positive dispersion nonlinear passive optical fiber (3) is single mode optical fiber or photonic crystal fiber.
8. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is that the positive dispersion fiber amplifier (4) is ytterbium doped optical fiber amplifier.
9. a kind of optical fiber femtosecond laser generating device passively shaped based on triangular pulse according to claim 1, special
Sign is that grating is reflective gratings to, transmission-type grating pair or volume Bragg grating to dispersion compensator (5).
10. a kind of optical fiber femtosecond laser production method passively shaped based on triangular pulse, it is characterised in that include the following steps:
S1, ultrashort laser pulse is generated；
S2, the step s1 ultrashort laser pulse generated is adjusted to the ultrashort laser pulse with negative chirp；
S3, the ultrashort laser pulse energy with negative chirp is concentrated to central wavelength, while by pulse in time domain and frequency domain
Waveform compression and shaping form the ultrashort laser pulse of triangle narrowband；
S4, the ultrashort laser pulse of triangle narrowband is carried out to similarity pulse amplification evolution, exports the linear chrip parabolic in broadband
Line laser pulse；
The positive chirp that s5, cancellation band linear chrip parabola laser pulse accumulate in self similarity amplification process, final output tool
There is the femto-second laser pulse of transform limit quality.
11. a kind of optical fiber femtosecond laser production method passively shaped based on triangular pulse according to claim 10,
It is characterized in that the step s2 is realized using negative dispersion chirped fiber grating (2).
12. a kind of optical fiber femtosecond laser production method passively shaped based on triangular pulse according to claim 10,
It is characterized in that the ultrashort laser pulse mean power 60mW~200mW, repetition rate 30MHz~100MHz, central wavelength
1030nm~1050nm, spectrum full width at half maximum degree 5nm~20nm.
13. a kind of optical fiber femtosecond laser production method passively shaped based on triangular pulse according to claim 10,
The spectrum full width at half maximum degree for being characterized in that the parabola shaped wide-band linearity chirped pulse is 20nm~50nm.
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| CN110411553A (en) * | 2019-08-15 | 2019-11-05 | 上海波汇科技有限公司 | Distribution type fiber-optic acoustic wave sensing system based on directional scatter |
| CN110445000A (en) * | 2019-06-30 | 2019-11-12 | 天津大学 | 1000-1100nm tunable wave length fs-laser system |
| CN111245410A (en) * | 2020-02-14 | 2020-06-05 | 贵州大学 | Direct modulation full duty parabolic pulse generating device |
| CN111884026A (en) * | 2020-07-16 | 2020-11-03 | 电子科技大学 | Ultrashort laser pulse light source system with high repetition frequency |
| CN112803234A (en) * | 2021-01-17 | 2021-05-14 | 北京工业大学 | Raman gain-based all-fiber chirped pulse amplification system of self-similar pulse shaping stretcher |
| CN113488833A (en) * | 2021-07-07 | 2021-10-08 | 北京交通大学 | Flat optical frequency comb generation device and method |
| WO2021258709A1 (en) * | 2020-06-25 | 2021-12-30 | 深圳奥锐达科技有限公司 | Dispersion spectrum lidar system and measurement method |
| WO2021258708A1 (en) * | 2020-06-25 | 2021-12-30 | 深圳奥锐达科技有限公司 | Dispersion spectrum photosensitive assembly, receiving end, and lidar system |
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| CN110445000A (en) * | 2019-06-30 | 2019-11-12 | 天津大学 | 1000-1100nm tunable wave length fs-laser system |
| CN110411553A (en) * | 2019-08-15 | 2019-11-05 | 上海波汇科技有限公司 | Distribution type fiber-optic acoustic wave sensing system based on directional scatter |
| CN111245410A (en) * | 2020-02-14 | 2020-06-05 | 贵州大学 | Direct modulation full duty parabolic pulse generating device |
| WO2021258709A1 (en) * | 2020-06-25 | 2021-12-30 | 深圳奥锐达科技有限公司 | Dispersion spectrum lidar system and measurement method |
| WO2021258708A1 (en) * | 2020-06-25 | 2021-12-30 | 深圳奥锐达科技有限公司 | Dispersion spectrum photosensitive assembly, receiving end, and lidar system |
| CN111884026A (en) * | 2020-07-16 | 2020-11-03 | 电子科技大学 | Ultrashort laser pulse light source system with high repetition frequency |
| CN112803234A (en) * | 2021-01-17 | 2021-05-14 | 北京工业大学 | Raman gain-based all-fiber chirped pulse amplification system of self-similar pulse shaping stretcher |
| CN112803234B (en) * | 2021-01-17 | 2023-02-07 | 北京工业大学 | All-fiber chirped pulse amplification system of self-similar pulse shaping stretcher based on Raman gain |
| CN113488833A (en) * | 2021-07-07 | 2021-10-08 | 北京交通大学 | Flat optical frequency comb generation device and method |
| CN114389131A (en) * | 2022-01-13 | 2022-04-22 | 杭州奥创光子技术有限公司 | Hybrid pulse laser and spectrum matching method |
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