CN109361139A - A fence pulse generation system - Google Patents
A fence pulse generation system Download PDFInfo
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- CN109361139A CN109361139A CN201811487197.0A CN201811487197A CN109361139A CN 109361139 A CN109361139 A CN 109361139A CN 201811487197 A CN201811487197 A CN 201811487197A CN 109361139 A CN109361139 A CN 109361139A
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- 239000000835 fiber Substances 0.000 claims abstract description 79
- 239000013307 optical fiber Substances 0.000 claims abstract description 24
- 238000009825 accumulation Methods 0.000 abstract description 5
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000001934 delay Effects 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 210000001367 artery Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- 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
-
- 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
- H01S3/10053—Phase control
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
本发明公开了一种栅栏脉冲产生系统，该系统包括光纤锁模激光器、波导幅度调制器和第一分束器，第一分束器的输出端分别连接有第一窄带滤波器和第二窄带滤波器，在第一窄带滤波器上串联有第一光纤延迟器，在第二窄带滤波器上串联有第一光纤衰减器，第一光纤延迟器的输出端和第一光纤衰减器的输出端并联然后均与第一耦合器的输入端相连，第一耦合器的输出端与若干二进制堆积单元串联，在二进制堆积单元的输出端分别连接有第一光纤放大器和第二光纤放大器，在第一光纤放大器上串联有第一N*1并联式堆积单元，在第二光纤放大器上串联有第二N*1并联式堆积单元，然后与合束器串联。本发明栅栏脉冲可以有效的抑制SRS和SBS的积累。
The invention discloses a fence pulse generation system. The system comprises a fiber mode locking laser, a waveguide amplitude modulator and a first beam splitter. The output ends of the first beam splitter are respectively connected with a first narrowband filter and a second narrowband filter. A filter, a first optical fiber delay device is connected in series on the first narrowband filter, a first optical fiber attenuator is connected in series on the second narrowband filter, the output end of the first optical fiber delay device and the output end of the first optical fiber attenuator are connected in series In parallel, they are all connected to the input end of the first coupler, the output end of the first coupler is connected in series with several binary stacking units, and the output ends of the binary stacking units are respectively connected with a first fiber amplifier and a second fiber amplifier, and the first A first N*1 parallel stacking unit is connected in series on the fiber amplifier, and a second N*1 parallel stacking unit is connected in series on the second fiber amplifier, and then connected in series with the beam combiner. The barrier pulse of the present invention can effectively suppress the accumulation of SRS and SBS.
Description
Technical field
The invention belongs to high power laser lights to drive the field laser-plasma interaction (LPI), and in particular to a kind of grid
Column pulse generating system can generate fence pulse flexibly and efficiently.
Background technique
In high power laser light driving inertial confinement fusion (ICF), with plasma strongly non-linear can occur for laser
Interaction, stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) are two processes of most important one, not only unrestrained
Expense laser energy will also result in pellet compression asymmetry, influence implosion igniting.Therefore, how to inhibit SRS and SBS in LPI, improve
Beam target coupling efficiency is always the emphasis that people are concerned about and study.In order to inhibit or reduce SRS and SBS, the science of countries in the world
Family propose method of many beam smoothings, such as smoothing by spectral dispersion, continuous phase plate, polarization smoothing etc..By uniform
The dimensional energy distribution of light beam, allows laser focal spot to fast move in target surface, to inhibit the generation of SRS and SBS.But American National
Igniter (NIF) fails to realize igniting as scheduled, is inadequate only with beam smoothing technology.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of fence pulse generating system, fence arteries and veins of the present invention
It rushes and different wavelength is presented between adjacent subpulse, any reshaping can be carried out, and the son of fence pulse can be adjusted flexibly
The parameters such as the interval of pulse wavelength, the width of subpulse and subpulse.
To achieve the above object, the invention adopts the following technical scheme:
A kind of fence pulse generating system, the system include optical fiber mode locked laser, waveguide amplitude modulator and the first beam splitter,
The output end of the optical fiber mode locked laser is connected with the input terminal of waveguide amplitude modulator, the waveguide amplitude modulator it is defeated
Outlet is connected with the input terminal of the first beam splitter, the output end of first beam splitter be connected separately with the first narrow band filter and
Second narrow band filter, first narrow band filter and the second narrow band filter are in parallel, on first narrow band filter
It is in series with the first fiber delay line, the first fibre optic attenuator, first optical fiber are in series on second narrow band filter
The output end of the output end of delayer and the first fibre optic attenuator is in parallel and then is connected with the input terminal of the first coupler, described
The output end of first coupler is connected with several binary heap product units, is connected respectively in the output end of the binary heap product unit
It is connected to the first fiber amplifier and the second fiber amplifier, first fiber amplifier and the second fiber amplifier are in parallel,
It is in series with the first parallel stacked units of N*1 on first fiber amplifier, is in series on second fiber amplifier
The 2nd parallel stacked units of N*1, the output of the first the N*1 parallel stacked units and the 2nd parallel stacked units of N*1
Bundling device is in series on end.
Each binary heap product unit respectively includes the second fiber delay line, the second fibre optic attenuator, and described
Then two fiber delay lines and the parallel connection of the second fibre optic attenuator are connected with the second coupler.
The quantity of the binary heap product unit is 2-5.
The quantity of the binary heap product unit is 3.
The parallel stacked units of first N*1 include the second beam splitter, in parallel in the output end of second beam splitter
There are several first delays and amplitude adjusting elements, the number of the number and the second beam splitter beam splitting of the delay and amplitude adjusting elements
It measures identical.
It include third fiber delay line and third fibre optic attenuator in first delay and amplitude adjusting elements, described the
Three fiber delay lines and the series connection of third fibre optic attenuator.
The parallel stacked units of 2nd N*1 include third beam splitter, in parallel in the output end of the third beam splitter
There are several second delays and amplitude adjusting elements, the number and the beam splitting of third beam splitter of second delay and amplitude adjusting elements
Quantity it is identical.
It include the 4th fiber delay line and the 4th fibre optic attenuator in second delay and amplitude adjusting elements, described the
Four fiber delay lines and the series connection of the 4th fibre optic attenuator.
First beam splitter is 1*2 beam splitter.
First coupler is 2*2 coupler.
Compared with prior art, the invention has the benefit that
1) different wavelength is presented between the adjacent subpulse of fence pulse；2) it is whole can to carry out any time waveform for fence pulse
Shape；3) parameters such as the interval of the subpulse wavelength of fence pulse, the width of subpulse and subpulse can be adjusted flexibly；It 4) can be real
Existing all-fiber, it is compact-sized.Fence pulse of the present invention can effectively inhibit the accumulation of SRS and SBS.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the schematic diagram that fence pulse is exported in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the present embodiment fence pulse generating system, which includes optical fiber mode locked laser 1, waveguide amplitude
Modulator 2 and the first beam splitter 3, the input terminal phase of the output end and waveguide amplitude modulator 2 of the optical fiber mode locked laser 1
Even, the output end of the waveguide amplitude modulator 2 is connected with the input terminal of the first beam splitter 3, and signal light is divided into two-way difference
It is connected with the narrow band filter, the output end of first beam splitter 3 is connected separately with the first narrow band filter 4 and second
The bandwidth of narrow band filter 5, the first narrow band filter 4 and the second narrow band filter 5 can be different, can make the adjacent subpulse be in
Existing different wavelength；First narrow band filter 4 and the second narrow band filter 5 are in parallel, on first narrow band filter 4
It is in series with the first fiber delay line 6, the first fibre optic attenuator 7, the optical fiber are in series on second narrow band filter 5
Delayer is used to adjust the delay between two-way pulse, and the fibre optic attenuator is for adjusting impulse amplitude, it can be achieved that pulse is whole
Shape；The output end of the output end of first fiber delay line 6 and the first fibre optic attenuator 7 it is in parallel then with the first coupler
8 input terminal is connected, and the output end of first coupler 8 is connected with several binary heap product units 9, in the binary heap
The output end of product unit 9 is connected separately with the first fiber amplifier 10 and the second fiber amplifier 11, first fiber amplifier
Device 10 and the second fiber amplifier 11 are in parallel, and it is single that the parallel accumulation of the first N*1 is in series on first fiber amplifier 10
Member 12, is in series with the parallel stacked units 13 of the 2nd N*1, the first N*1 is parallel on second fiber amplifier 11
Bundling device 14 is in series on the output end of stacked units 12 and the parallel stacked units 13 of the 2nd N*1.
Preferably, each binary heap product unit 9 of the present embodiment respectively includes the second fiber delay line 15, the second light
Then fine attenuator 16, second fiber delay line 15 and 16 parallel connection of the second fibre optic attenuator are connected with the second coupler 17.
As further preferred, the quantity of the present embodiment binary heap product unit 9 is 3, can be increased as needed several
Binary heap product unit can choose 2,5 etc., and required pulse width is realized in accumulation；
As still more preferably, the parallel stacked units 12 of the first N*1 of the present embodiment include the second beam splitter 18, described the
The output end of two beam splitters 18 is parallel with several first delays and amplitude adjusting elements 19, the delay and amplitude adjusting elements 19
Number it is identical as the quantity of 18 beam splitting of the second beam splitter.
It include third fiber delay line in the delay of the present embodiment first and amplitude adjusting elements 19 as still more preferably
20 and third fibre optic attenuator 21, the third fiber delay line 20 and third fibre optic attenuator 21 are connected.
As still more preferably, the parallel stacked units 13 of the 2nd N*1 of the present embodiment include third beam splitter 22, in institute
The output end for stating third beam splitter 22 is parallel with several second delays and amplitude adjusting elements 23, second delay and amplitude tune
The number for saving unit 23 is identical as the quantity of 22 beam splitting of third beam splitter.
It include the 4th fiber delay line in the delay of the present embodiment second and amplitude adjusting elements 23 as still more preferably
24 and the 4th fibre optic attenuator 25, the 4th fiber delay line 24 and the series connection of the 4th fibre optic attenuator 25.
As still more preferably, the first beam splitter of the present embodiment 3 is 1*2 beam splitter；First coupler 8 is 2*2 coupling
Device.
In the present embodiment: the optical fiber mode locked laser 1 used is optical fiber mode locking of the central wavelength for 1053nm with chirp
Laser, the first narrow band filter 4 and 5 central wavelength of the second narrow band filter are respectively 1052.5nm and 1053.5nm, bandwidth
It is 0.9nm, the degree of regulation of the first fiber delay line, the second fiber delay line and third fiber delay line is in the present invention
0.5ps, the device are connected by single-mode polarization maintaining fiber.
The course of work of the present embodiment is as follows:
The output pulse of optical fiber mode locked laser 1 divides through the first beam splitter of 1*2 3 after waveguide amplitude modulator 2 carries out frequency reducing and is
After two-way, it is separately connected the first narrow band filter 4 and the second narrow band filter 5, laser pulse width is adjusted to 8ps, is passed through
It is 8ps that first fiber delay line 6, which adjusts two-way pulse daley amount, and the first fibre optic attenuator 7 as needed carries out impulse amplitude
It adjusts, the first coupler of 2*2 8 accumulates the two-way pulse after adjusting, and pulse width becomes 16ps, the first coupler of 2*2 8
Pulse is divided into two-way and passes through the second fiber delay line 15 and the second fibre optic attenuator 16, ibid, the second fiber delay line respectively
15 adjust two-way pulse daley amount as 16ps, and the second fibre optic attenuator 16 is as needed adjusted impulse amplitude, 2*2 second
Coupler 17 accumulates the two-way pulse after adjusting, and pulse width becomes 32ps, similarly, repeats aforesaid operations, can be by arteries and veins
Rushing width accumulation is 128ps, and distributed wave can arbitrarily be adjusted as needed by fibre optic attenuator, is then accumulated by binary system single
2*2 coupler is divided into two-way in member 9, carries out energy compensating by the first fiber amplifier 10 and the second fiber amplifier 11 respectively
Afterwards, pass through the second beam splitter of 1*4 18 and 1*4 third beam splitter 22, the pulse that 8 tunnel pulsewidths of output are 128ps, per arteries and veins all the way respectively
Fiber delay line and fibre optic attenuator are passed through in punching, the retardation of fiber delay line are adjusted, so that the delay of adjacent two-way pulse
Amount is 128ps, by 8 tunnel pulse pile-ups is pulse that pulsewidth is 1024ps, the Annual distribution of pulse finally by 8*1 bundling device 14
It can arbitrarily be adjusted as needed by fibre optic attenuator, output pulse schematic diagram is as shown in Figure 2.
Although above-described embodiment makes specific descriptions to the present invention, come for those of ordinary skill in the art
It says, it is understood that can be modified within spirit and scope of the invention based on present disclosure not departing from
Or improve, these modification and improvement are all within spirit and scope of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487197.0A CN109361139B (en) | 2018-12-06 | 2018-12-06 | A fence pulse generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487197.0A CN109361139B (en) | 2018-12-06 | 2018-12-06 | A fence pulse generation system |
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| Publication Number | Publication Date |
|---|---|
| CN109361139A true CN109361139A (en) | 2019-02-19 |
| CN109361139B CN109361139B (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811487197.0A Expired - Fee Related CN109361139B (en) | 2018-12-06 | 2018-12-06 | A fence pulse generation system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137604A (en) * | 1996-12-04 | 2000-10-24 | Tyco Submarine Systems, Ltd. | Chromatic dispersion compensation in wavelength division multiplexed optical transmission systems |
| US20040052276A1 (en) * | 2002-05-10 | 2004-03-18 | Lou Janet W. | Multiple wavelength pulased source |
| US20040179842A1 (en) * | 2003-03-13 | 2004-09-16 | Fujitsu Limited | Method of and apparatus for providing multi-wavelength light source |
| US20110305250A1 (en) * | 2010-03-05 | 2011-12-15 | TeraDiode, Inc. | Wavelength beam combining based pulsed lasers |
| CN103023531A (en) * | 2012-11-22 | 2013-04-03 | 湖南大学 | Full-gloss ultra wide band pulse generation method based on semiconductor light amplifier and light time delay line |
| CN103809346A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Ultra high-speed optical analog-to-digital conversion device |
-
2018
- 2018-12-06 CN CN201811487197.0A patent/CN109361139B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137604A (en) * | 1996-12-04 | 2000-10-24 | Tyco Submarine Systems, Ltd. | Chromatic dispersion compensation in wavelength division multiplexed optical transmission systems |
| US20040052276A1 (en) * | 2002-05-10 | 2004-03-18 | Lou Janet W. | Multiple wavelength pulased source |
| US20040179842A1 (en) * | 2003-03-13 | 2004-09-16 | Fujitsu Limited | Method of and apparatus for providing multi-wavelength light source |
| US20110305250A1 (en) * | 2010-03-05 | 2011-12-15 | TeraDiode, Inc. | Wavelength beam combining based pulsed lasers |
| CN103023531A (en) * | 2012-11-22 | 2013-04-03 | 湖南大学 | Full-gloss ultra wide band pulse generation method based on semiconductor light amplifier and light time delay line |
| CN103809346A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Ultra high-speed optical analog-to-digital conversion device |
Non-Patent Citations (3)
| Title |
|---|
| YONG KONG等: "64-Channel Optical Pulse Stacker", 《JOURNAL OF LIGHTWAVE TECHOLOGY》 * |
| 曾曙光等: "脉冲堆积激光三倍频过程的逆问题", 《光学学报》 * |
| 隋展: "栅栏脉冲", 《中国博士学位论文全文数据库 信息科技辑》 * |
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