CN201212935Y - Chirp stretched laser pulse spectrum shaping device - Google Patents
Chirp stretched laser pulse spectrum shaping device Download PDFInfo
- Publication number
- CN201212935Y CN201212935Y CNU2008201504655U CN200820150465U CN201212935Y CN 201212935 Y CN201212935 Y CN 201212935Y CN U2008201504655 U CNU2008201504655 U CN U2008201504655U CN 200820150465 U CN200820150465 U CN 200820150465U CN 201212935 Y CN201212935 Y CN 201212935Y
- Authority
- CN
- China
- Prior art keywords
- pulse
- shaping
- laser pulse
- fiber
- chirp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007493 shaping process Methods 0.000 title claims abstract description 70
- 238000001228 spectrum Methods 0.000 title claims abstract description 33
- 239000000835 fiber Substances 0.000 claims abstract description 56
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000003321 amplification Effects 0.000 abstract description 12
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 12
- 230000003595 spectral effect Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Images
Landscapes
- Lasers (AREA)
Abstract
The utility model provides a chirp widens spectral shaping device of laser pulse, comprises mode-locked laser, grating stretcher, lens, pulse sampler, fiber beam splitter, fiber amplifier, synchronous photoelectric conversion device, plastic electric pulse generator and integrated waveguide electricity conductive light modulator, the utility model discloses can realize carrying out the spectrum to the chirp widening pulse before enlarging and reshape in advance, reduce the gain narrowing effect in the chirp pulse amplification system greatly. The device does not need complicated light path and mechanical device, changes the spectrum shape very conveniently, and the flexible operation, high efficiency is inserted into the chirp pulse multistage amplification system easily.
Description
Technical field
The utility model relates to chirped laser pulse, particularly a kind of chirp spread laser pulse light spectrum shaping device.
Technical background
Chirped pulse amplification is usually used in producing terawatt (TW) even claps in watt ultrashort, super strong laser pulse experimental provision, and seed laser pulse carries out time explanation in stretcher, carry out multistage amplification again.Because the power density of the seed laser pulse behind the broadening is low excessively, amplification stage is divided into the pre-amplification of high-gain and two stages of power amplification usually.At the pre-amplification stage of high-gain,, make that the laser pulse behind final the amplification can't the original pulsewidth of compression and back because the laser pulse light spectrum that the gain narrowing effect of laser medium causes amplifying usually narrows.The pre-shaping technique of application of spectral can reduce the spectrum narrowing effect, thereby realizes the laser pulse output that pulsewidth is narrower, peak power density is bigger.In order to overcome the gain narrowing effect in the ultrashort laser pulse amplification process, people have proposed the method for several light spectrum reshapings, such as in light path, loading spike interference filter and quartzy birefringent filter, adopt reflection type grip pitch variable grating to realize the method for laser spectrum shaping, these methods have satisfied the needs of experiment to a certain extent, but also there are some problems, there are some spikes such as the spectrum after the shaping, it is more loaded down with trivial details to change spectral shape, the light path degree of regulation is required than higher, stability is bad, and device fabrication is difficulty etc. relatively.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that above-mentioned prior art exists, and a kind of chirp spread laser pulse light spectrum shaping device is provided.This apparatus for shaping does not need complicated light path and mechanical hook-up, and it is very convenient to change spectral shape, flexible operation, and the efficient height is embedded into easily in the multistage amplification system of chirped pulse and goes.
The utility model is that ultimate principle is as follows:
Seed laser pulse is through grating stretching, be coupled in the single-mode fiber, choose single laser pulse through the integrated waveguide modulator that is loaded with an electric pulse, carry out the time shaping through the integrated waveguide modulator that is loaded with the shaping electric pulse again, thereby realize light spectrum reshaping.
If seed laser pulse electric field intensity is;
Behind the stretcher broadening:
In the formula:
φ ', φ ＂ are respectively group delay, group velocity dispersion coefficient.
In the integrated waveguide modulator, carry out the time shaping:
ε (t) is the distribution function in time of laser pulse electric field intensity after the shaping.In the formula
In the formula: V
π, V
Pi/2Be respectively the half-wave voltage and 1/4th voltages of electrooptical modulation crystal, V (t) is a shaping electric pulse voltage, V
DcIt is dc offset voltage.
(3) formula is carried out Fourier transform can obtain the distribution of electric field intensity in frequency domain:
So the spectral shape of the laser pulse after the shaping is:
I(ω)∝|ε(ω)|
2 (6)
Technical solution of the present utility model is as follows:
A kind of light spectrum shaping device of chirp spread laser pulse, its characteristics are: this device is by mode-locked laser, the grating stretching device, lens, pulse sample, fiber optic splitter, fiber amplifier, the synchronizable optical electrical switching device, shaping electric pulse generator and integrated waveguide electrooptic modulator constitute, its position relation is: the ultrashort laser pulse for the treatment of shaping of mode-locked laser output, through grating stretching device broadening, again through the input end of Lens Coupling to first single-mode fiber, the input end of the described pulse sample of output termination of this first single-mode fiber, the output terminal of this pulse sample connects described fiber optic splitter by second single-mode fiber, the input end of the described fiber amplifier of the first output termination of this fiber optic splitter, the output terminal of this fiber amplifier connects described synchronizable optical electrical switching device through the 5th single-mode fiber, the output terminal of this synchronizable optical electrical switching device connects described shaping electric pulse generator input end by first concentric cable, and the output terminal of this shaping electric pulse generator connects described integrated waveguide electrooptic modulator first input end by second concentric cable; Described fiber optic splitter second output terminal connects second input end of described integrated waveguide electrooptic modulator through the 3rd single-mode fiber, and by the output of the 4th single-mode fiber, spectrum has obtained shaping through shaping electric pulse modulation back in the ultrashort laser pulse for the treatment of shaping.
Above-mentioned chirp spread laser pulse light spectrum shaping device carries out the method for laser pulse light spectrum shaping, comprises the following steps:
1. the grating stretching device carries out chirp spread to the ultrashort seed laser pulse near the Fourier transform limit, makes the frequency interval and the linear corresponding relation of the time interval of laser pulse;
2. pulse sample is chosen only pulse to the high repetition frequency laser pulse sequence, makes the repetition frequency of the laser pulse behind the broadening be reduced to 1Hz;
3. use fiber optic splitter and carry out the laser pulse beam splitting, produce synchronous triggering electric pulse, promote the shaping electric pulse generator and produce the shaping electric pulse, make it and treat shaped laser pulses maintenance high level of synchronization by the synchronizable optical electrical switching device;
4. use the shaping electric pulse of shaping electric pulse generator generation and import described integrated waveguide electrooptic modulator, electric pulse shaping modulation is carried out in the ultrashort laser pulse for the treatment of shaping of importing second input end of described integrated waveguide electrooptic modulator through the 3rd single-mode fiber by described fiber optic splitter second output terminal, exported by the 4th single-mode fiber.
Technique effect of the present utility model:
1, this light spectrum reshaping scheme can obtain smooth unmodulated shaping spectral waveform.
2, this light spectrum reshaping scheme does not have complicated light path, and laser pulse mainly transmits in optical fiber, and is easy to adjust, and stability is high.
3, this light spectrum reshaping scheme can change spectral waveform very easily, only needs to change the shaping electric pulse waveform.
4, laser pulse passes through broadening, chooses monopulse in this light spectrum reshaping scheme, therefore can very easily be embedded in the chirped laser pulse amplification system and go
Description of drawings
Fig. 1 is the structural representation of the utility model chirp spread laser pulse light spectrum shaping device.
Fig. 2 is the shaping electric pulse waveform of three different modulating degree of depth.
Fig. 3 is the laser pulse light spectral shape after three different modulating degree of depth shaping electric pulses are modulated in the corresponding diagram 2.
Embodiment
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing, but should not limit protection domain of the present utility model with this.
See also Fig. 1 earlier, Fig. 1 is the structural representation of the utility model chirp spread laser pulse light spectrum shaping device.As seen from the figure, the light spectrum shaping device of the utility model chirp spread laser pulse, by mode-locked laser 1, grating stretching device 2, lens 3, pulse sample 5, fiber optic splitter 6, fiber amplifier 7, synchronizable optical electrical switching device 8, shaping electric pulse generator 10 and integrated waveguide electrooptic modulator 11 constitute, its position relation is: the ultrashort laser pulse of described mode-locked laser 1 output, through grating stretching device 2 broadenings, be coupled to the input end of first single-mode fiber 41 again through lens 3, the input end of the output termination pulse sample 5 of this first single-mode fiber 41, the output terminal of this pulse sample 5 connects described fiber optic splitter 6 by second single-mode fiber 42, the input end of the described fiber amplifier 7 of the first output termination of this fiber optic splitter 6, the output terminal of this fiber amplifier 7 connects described synchronizable optical electrical switching device 8 through the 5th single-mode fiber 45, the output terminal of this synchronizable optical electrical switching device 8 connects described shaping electric pulse generator 10 input ends by first concentric cable 91, and the output terminal of this shaping electric pulse generator 10 connects described integrated waveguide electrooptic modulator 11 first input ends by second concentric cable 92; Described fiber optic splitter 6 second output terminals connect second input end of described integrated waveguide electrooptic modulator 11 through the 3rd single-mode fiber 43, the ultrashort laser pulse for the treatment of shaping is here through after the modulation of shaping electric pulse, by 44 outputs of the 4th single-mode fiber, spectrum has obtained shaping.
The process that described chirp spread laser pulse light spectrum shaping device carries out laser pulse light spectrum shaping comprises the following steps:
1. 2 pairs of ultrashort seed laser pulses near the Fourier transform limit by mode-locked laser 1 input of grating stretching device carry out chirp spread, make the frequency interval and the linear corresponding relation of the time interval of laser pulse;
2. the high repetition frequency laser pulse sequence of the chirp spread of 5 pairs of inputs of pulse sample is chosen monopulse, makes the repetition frequency of the laser pulse behind the broadening be reduced to 1Hz;
3. described fiber optic splitter 6 carries out the laser pulse beam splitting, and more weak light beam produces synchronous triggering electric pulse by synchronizable optical electrical switching device 8, promotes shaping electric pulse generator 10 and produces the shaping electric pulse, makes it and treat shaped laser pulses maintenance high level of synchronization;
4. use the shaping electric pulse of shaping electric pulse generator 10 generations and import described integrated waveguide electrooptic modulator 11, to carrying out electric pulse shaping modulation through the ultrashort laser pulse for the treatment of shaping of second input end of the described integrated waveguide electrooptic modulator 11 of the 3rd single-mode fiber 43 inputs, by 44 outputs of the 4th single-mode fiber by described fiber optic splitter 6 second output terminals.
Light spectrum reshaping scheme for the ease of understanding the utility model proposes is described this programme with following embodiment, and numerical evaluation the spectral waveform before and after shaping electric pulse waveform and the shaping:
1. mode-locked laser 1 is exported the seed laser pulse of 220fs, and the big overall with of spectrum half-shadow is 7.4nm.
2. pass through grating stretching device 2, seed laser pulse by linear broadening to 1.2ns.
3. scioptics 3 are coupled in the single-mode fiber.
4. be made of integrated waveguide modulator and 1Hz square-wave pulse generator sampler 5, choose monopulse, laser pulse frequency is reduced to 1Hz.
5. laser pulse imports to fiber optic splitter 6 by single-mode fiber, laser pulse is divided into two bundles, more weak a branch of process fiber amplifier 7 amplifies, the photoelectric conversion device 8 that desynchronizes then produces the synchronous triggering electric pulse, removes to trigger shaping electric pulse generator 10 with this electric pulse and produces the shaping electric pulse.
6. the stronger beam of laser pulse of exporting by fiber optic splitter 6, delay time through the 3rd single-mode fiber 43, be directed to integrated waveguide electrooptic modulator 11 simultaneously with the shaping electric pulse, laser pulse is through electrooptical modulation, on time by shaping, because the linear chrip laser pulse frequency interval and the time interval is linear corresponding, the spectral waveform and the time waveform of the laser pulse after the shaping are same.
Shaping electric pulse voltage waveform as shown in Figure 2 distributes in time.Fig. 3 is corresponding spectral shape, and the corresponding laser pulse of solid line is the spectrum during shaping not.The spectrum of laser pulse is through after the shaping among Fig. 3, and after tested, not only waveform becomes this shape of superelevation of flat-top by Gauss's shape, even the centre can present depression, and the complete works of wide degree of spectrum half-shadow has been widened 1～4nm before than shaping.
Claims (1)
1, a kind of light spectrum shaping device of chirp spread laser pulse, it is characterized in that: this device is by mode-locked laser (1), grating stretching device (2), lens (3), pulse sample (5), fiber optic splitter (6), fiber amplifier (7), synchronizable optical electrical switching device (8), shaping electric pulse generator (10) and integrated waveguide electrooptic modulator (11) constitute, its position relation is: the ultrashort laser pulse of mode-locked laser (1) output, through grating stretching device (2) broadening, be coupled to the input end of first single-mode fiber (41) through lens (3) again, the input end of the output termination pulse sample (5) of this first single-mode fiber (41), the output terminal of this pulse sample (5) connects described fiber optic splitter (6) by second single-mode fiber (42), the input end of the first output described fiber amplifier of termination (7) of this fiber optic splitter (6), the output terminal of this fiber amplifier (7) connects described synchronizable optical electrical switching device (8) through the 5th single-mode fiber (45), the output terminal of this synchronizable optical electrical switching device (8) connects described shaping electric pulse generator (10) input end by first concentric cable (91), and the output terminal of this shaping electric pulse generator (10) connects described integrated waveguide electrooptic modulator (11) first input end by second concentric cable (92); Described fiber optic splitter (6) second output terminals connect second input end of described integrated waveguide electrooptic modulator (11) through the 3rd single-mode fiber (43), the ultrashort laser pulse process shaping electric pulse modulation back for the treatment of shaping is by the 4th single-mode fiber (44) output, and spectrum has obtained shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201504655U CN201212935Y (en) | 2008-07-02 | 2008-07-02 | Chirp stretched laser pulse spectrum shaping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201504655U CN201212935Y (en) | 2008-07-02 | 2008-07-02 | Chirp stretched laser pulse spectrum shaping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201212935Y true CN201212935Y (en) | 2009-03-25 |
Family
ID=40497111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201504655U Expired - Lifetime CN201212935Y (en) | 2008-07-02 | 2008-07-02 | Chirp stretched laser pulse spectrum shaping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201212935Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100570461C (en) * | 2008-07-02 | 2009-12-16 | 中国科学院上海光学精密机械研究所 | Chirp stretched laser pulse spectrum shaping device and method |
| CN102176104A (en) * | 2011-01-18 | 2011-09-07 | 南京大学 | Tunable time domain dual-optical pulse generating method and generator |
| CN104158075A (en) * | 2014-08-05 | 2014-11-19 | 中国空间技术研究院 | Super Gaussian pulse generation method and device on basis of gain reshaping |
| CN105572915A (en) * | 2016-03-15 | 2016-05-11 | 中国电子科技集团公司第三十四研究所 | Electro-optical modulator optical pulse shaping apparatus and shaping method introducing reference light |
| CN105607296A (en) * | 2016-03-15 | 2016-05-25 | 中国电子科技集团公司第三十四研究所 | Light pulse shaping device based on electro-optical modulator and shaping method |
| CN111711052A (en) * | 2020-06-04 | 2020-09-25 | 中国科学院上海光学精密机械研究所 | Chirped pulse spectrum shaping device and method based on electro-optic modulation |
-
2008
- 2008-07-02 CN CNU2008201504655U patent/CN201212935Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100570461C (en) * | 2008-07-02 | 2009-12-16 | 中国科学院上海光学精密机械研究所 | Chirp stretched laser pulse spectrum shaping device and method |
| CN102176104A (en) * | 2011-01-18 | 2011-09-07 | 南京大学 | Tunable time domain dual-optical pulse generating method and generator |
| CN104158075A (en) * | 2014-08-05 | 2014-11-19 | 中国空间技术研究院 | Super Gaussian pulse generation method and device on basis of gain reshaping |
| CN104158075B (en) * | 2014-08-05 | 2017-01-25 | 中国空间技术研究院 | Super Gaussian pulse generation method and device on basis of gain reshaping |
| CN105572915A (en) * | 2016-03-15 | 2016-05-11 | 中国电子科技集团公司第三十四研究所 | Electro-optical modulator optical pulse shaping apparatus and shaping method introducing reference light |
| CN105607296A (en) * | 2016-03-15 | 2016-05-25 | 中国电子科技集团公司第三十四研究所 | Light pulse shaping device based on electro-optical modulator and shaping method |
| CN105572915B (en) * | 2016-03-15 | 2018-02-13 | 中国电子科技集团公司第三十四研究所 | A kind of electrooptic modulator light pulse reshaping apparatus and shaping methods for introducing reference light |
| CN105607296B (en) * | 2016-03-15 | 2019-01-25 | 中国电子科技集团公司第三十四研究所 | A kind of light pulse reshaping apparatus and shaping methods based on electrooptic modulator |
| CN111711052A (en) * | 2020-06-04 | 2020-09-25 | 中国科学院上海光学精密机械研究所 | Chirped pulse spectrum shaping device and method based on electro-optic modulation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100570461C (en) | Chirp stretched laser pulse spectrum shaping device and method | |
| CN201212935Y (en) | Chirp stretched laser pulse spectrum shaping device | |
| CN108508676B (en) | Interval adjustable optical frequency comb based on phase modulation and optical fiber cavity soliton and generation method | |
| Frisquet et al. | Two-stage linear-nonlinear shaping of an optical frequency comb as rogue nonlinear-Schrödinger-equation-solution generator | |
| WO2016115769A1 (en) | All-optical tunable broadband linearly chirped signal generating device | |
| CN107682091B (en) | Time delay hiding and spread spectrum system and method for generating signal by using same | |
| CN107492781B (en) | 1.7 mu m wave band broadband picosecond pulse multi-wavelength optical fiber light source | |
| CN106207737A (en) | A kind of laser shaping pulse acquisition device and acquisition methods | |
| Wang et al. | Generation of triangular-shaped optical pulses in normally dispersive fibre | |
| CN204190774U (en) | A kind of optical triangulation shape pulse generator based on four times of rf modulations | |
| Li et al. | Experimental demonstration of symmetrical waveform generation based on amplitude-only modulation in a fiber-based temporal pulse shaping system | |
| CN206099035U (en) | Laser shaping pulse acquisition device | |
| CN204067844U (en) | The fiber laser system that narrow linewidth, high peak power pulse export | |
| US20230011819A1 (en) | Intelligent real-time full-field measurement method and system for high-repetition-rate femtosecond pulse | |
| CN111478176A (en) | Waveform generating device and method based on semiconductor laser unit monocycle oscillation | |
| CN116316007A (en) | Ultra-high-speed arbitrary waveform generator and generation method based on synthesized dimension | |
| CN105323010A (en) | Unbalanced time domain pulse based chirped microwave signal generation device and generation method | |
| CN205160533U (en) | Microwave signal generator means warbles based on pulse of nonequilibrium time domain | |
| Nishitani et al. | Integration of a proposed all-optical analog-to-digital converter using self-frequency shifting in fiber and a pulse-shaping technique | |
| CN205680924U (en) | A kind of pure-tone pulse full-optical-fiber laser based on Self-phase modulation precompensation | |
| Cao et al. | Generation of dark pulse trains from continuous-wave light using cross-phase modulation in optical fibers | |
| CN209823096U (en) | Periodically-branched dissipative soliton resonance type pulse fiber laser | |
| Wang et al. | Generation of high-power pulse trains based on the second-order Akhmediev breathers | |
| Wang et al. | Background-free microwave signal generation based on unbalanced temporal pulse shaping | |
| Zhu et al. | A photonic analog-to-digital converter with multiplied sampling rate using a fiber ring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080702 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080702 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |