CN208299195U - Dual wavelength complementary structure laser pulse generation device and laser pulse generation system - Google Patents
Dual wavelength complementary structure laser pulse generation device and laser pulse generation system Download PDFInfo
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- CN208299195U CN208299195U CN201820788253.3U CN201820788253U CN208299195U CN 208299195 U CN208299195 U CN 208299195U CN 201820788253 U CN201820788253 U CN 201820788253U CN 208299195 U CN208299195 U CN 208299195U
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- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000010287 polarization Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 5
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- 229910052769 Ytterbium Inorganic materials 0.000 description 2
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- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 2
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Abstract
This application discloses a kind of dual wavelength complementary structure laser pulse generation device and laser pulse generation systems.A kind of dual wavelength complementary structure laser pulse generation device includes: to be disposed with the polarizer, electro-optic crystal, analyzer, the first optical filter, the first optical fiber collimator and fiber coupler along the direction that incident wide spectrum laser advances, and the wide spectrum laser is generated by laser generation source；It further include controlling brancher, the controlling brancher includes timing sequencer and high-voltage amplifier, and the high-voltage amplifier is connect with the electro-optic crystal, and the high-voltage amplifier amplifies the clock signal that the timing sequencer generates；It further include lateral optical path between the analyzer and the fiber coupler, the lateral optical path includes the second optical filter and the second optical fiber collimator.
Description
Technical field
This application involves laser pulse technical field, specifically a kind of dual wavelength complementary structure laser pulse generation device and
Laser pulse generation system.
Background technique
The retrofit of material needs the time structure of quickly control laser pulse, can laser output using acousto-optic or
Person's electrooptical switching is modulated to realize.But the tolerance power of these devices is not used in swashing for high-average power generally at tens watts
In photosystem.Common practice is switch laser oscillation source or the lesser place of pre-amplifier output power, but to sharp
The modulation of light necessarily causes the input power of main amplifier and time structure to change, and amplifier cannot work pervious
Optimal State, and usually retrofit occasion requires according to different processing objects not fix come modulation switch laser
Modulating mode or specific switch time, main amplifier can not just adapt to this adjustment at all.
Utility model content
In view of drawbacks described above in the prior art or deficiency, the utility model provides a kind of dual wavelength of time complementary structure
Laser pulse generation device and laser pulse generation system.
In a first aspect, providing a kind of dual wavelength complementary structure laser pulse generation device, described device includes:
The polarizer, electro-optic crystal, analyzer, the first optics are disposed with along the direction that incident wide spectrum laser advances
Filter, the first optical fiber collimator and fiber coupler, the wide spectrum laser are generated by laser generation source；
It further include controlling brancher, the controlling brancher includes timing sequencer and high-voltage amplifier, the high-voltage amplifier
It is connect with the electro-optic crystal, the high-voltage amplifier amplifies the clock signal that the timing sequencer generates；
It further include lateral optical path between the analyzer and the fiber coupler, the lateral optical path includes the second optics
Filter and the second optical fiber collimator.
Second aspect, provides a kind of dual wavelength complementary structure laser pulse generation device, and described device includes:
The polarizer, acousto-optic crsytal, analyzer, the first optics are disposed with along the direction that incident wide spectrum laser advances
Filter, the first optical fiber collimator and fiber coupler, the wide spectrum laser are generated by laser generation source；
It further include controlling brancher, the controlling brancher includes timing sequencer and radio frequency amplifier, the radio frequency amplifier
It is connect with the acousto-optic crsytal, the radio frequency amplifier amplifies the clock signal that the timing sequencer generates；
It further include lateral optical path between the analyzer and the fiber coupler, the lateral optical path includes the second optics
Filter and the second optical fiber collimator.
The third aspect provides a kind of laser pulse generation system, and the system comprises each embodiment institutes of the utility model
The dual wavelength complementary structure laser pulse generation device of offer, the system also includes: main amplifier and wavelength separator.
According to technical solution provided by the embodiments of the present application, the laser pulse of two optical paths is coupled by fiber coupler
To in optic fibre light path, it is combined into and incident wide spectrum laser time structure having the same.And the optical maser wavelength of two-way laser
It is different, it is convenient for subsequent laser amplifier, and separate after amplification by different wave length using optically filtering method, obtained
Obtain required laser pulse.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 shows the exemplary structure of the dual wavelength complementary structure laser pulse generation device according to the embodiment of the present application
Block diagram；
Fig. 2 shows the another exemplaries according to the dual wavelength complementary structure laser pulse generation device of the embodiment of the present application
Structural block diagram；
Fig. 3 is shown according to the another exemplary of the dual wavelength complementary structure laser pulse generation device of the embodiment of the present application
Structural block diagram；
Fig. 4 shows the illustrative diagram of the Laser pulse time structure change according to the embodiment of the present application；
Fig. 5 is shown according to the another exemplary of the dual wavelength complementary structure laser pulse generation device of the embodiment of the present application
Structural block diagram；
Fig. 6 shows the exemplary block diagram of the laser pulse generation system according to the embodiment of the present application.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to FIG. 1, showing the dual wavelength complementary structure laser pulse generation device knot according to one embodiment of the application
Structure schematic diagram.A kind of dual wavelength complementary structure laser pulse generation device includes:
The polarizer 14, electro-optic crystal 15, analyzer 16, the are disposed with along the direction that incident wide spectrum laser advances
One optical filter 17, the first optical fiber collimator 18 and fiber coupler 21, the wide spectrum laser are produced by laser generation source 10
It is raw；
It further include controlling brancher (not marked in figure), the controlling brancher includes timing sequencer 11 and high-voltage amplifier
12, the high-voltage amplifier 12 is connect with the electro-optic crystal 15, and the high-voltage amplifier 12 amplifies the timing sequencer 11
The clock signal of generation；
It further include lateral optical path (not marked in figure) between the analyzer 16 and the fiber coupler 21, it is described lateral
Optical path includes the second optical filter 19 and the second optical fiber collimator 20.
The dual wavelength complementary structure laser pulse generation device of the utility model utilizes the optical modulation method of electro-optic crystal
Change the polarization state of laser, and two-way time complementary pulse structure generated by analyzer,
Two-way laser pulse chooses two different wavelength through wave filter, these wavelength are all in the flat increasing of image intensifer
Beneficial area, both wavelength are provided with time complementary structure.
Two kinds of wavelength are coupled in fiber coupler, two kinds of wavelength lasers are because of time upper complementation, the pulse knot of output
Structure is similar to the pulse structure that laser generation source is emitted.The input power of main amplifier and time structure parameter so does not change
Become, so that the main amplifier of laser pulse generation system remains to steady operation.This structure can be applied to wide spectrum gain ranging
Laser amplifier, such as ytterbium doped optical fiber amplifier.
Specifically, laser generation source 10 is femtosecond laser oscillation source, for generating the laser pulse of wide spectrum:
Controlling brancher generates laser pulse structure for controlling electro-optic crystal, comprising:
Timing sequencer 11, to generate the pulse structure of needs,
High-voltage amplifier 12, for amplifying the clock signal of timing sequencer generation, to drive electro-optic crystal.
The polarizer 14 strengthens vertical direction polarization laser, increases polarization extinction ratio；
Electro-optic crystal 15 receives the switch driving of high-voltage amplifier timing control, so that incident vertical polarization laser has height
Horizontal vertical direction is changed into when pressure,
Analyzer 16, separation is by the laser pulse of electro-optic crystal, and in vertical polarization, laser passes through lateral escape window
Mouthful, when horizontal polarization before to passing through.
The polarizer 14, electro-optic crystal 15 and analyzer 16 form optical modulation branch, receive the control of controlling brancher, make to swash
Light polarization direction becomes horizontal from vertical.
First optical filter 17 and the first optical fiber collimator 18 formed before to optical path, be converted into preceding only to laser pulse
A kind of laser pulse comprising wavelength, and coupled into optical fibres；
Lateral optical path includes the second optical filter 19 and the second optical fiber collimator 20, is converted into preceding only to laser pulse
Laser pulse comprising another wavelength, and coupled into optical fibres.
Then, referring to FIG. 2, showing the dual wavelength complementary structure laser pulse generation device according to the embodiment of the present application
Another exemplary structural block diagram；
The difference of Fig. 2 and Fig. 1 is only that there is half-wave plate 13 between laser generation source 10 and the polarizer 14.Half-wave plate 13 can
For adjusting the polarization direction for the laser that oscillation source is emitted, such as vertical direction.
Then, Fig. 3 and Fig. 4 are please referred to, wherein Fig. 3 shows the dual wavelength complementary structure laser according to the embodiment of the present application
The another exemplary block diagram of pulse generating device, Fig. 4 show the Laser pulse time structure according to the embodiment of the present application
The illustrative diagram of variation.
The difference of Fig. 3 and Fig. 2 is only that the timing sequencer is connect with the laser generation source, to realize synchronous touching
Hair.Improve effective control of timing.
Pulse generating device is specifically described below with reference to Fig. 4, the pulse generating device of the present embodiment includes femtosecond laser vibration
Swing source 10, timing sequencer 11, high-voltage amplifier 12, half-wave plate 13, the polarizer 14, electro-optic crystal 15, analyzer 16, the first light
Learn filter 17, the first optical fiber collimator 18, the second optical filter 19, the second optical fiber collimator 20, fiber coupler 21.Its
In the first optical filter 17 be 1030nm optical filter, the second optical filter 19 be 1040nm optical filter.Femtosecond
Laser generation source 10, for generating the laser pulse of wide spectrum, the spectral region of general tens nanometers of support is especially covered
The gain regions of 1030-1040nm.Laser pulse 301 shown in Fig. 4 can be generated, are timing sequencer as needed thereon
The control waveform 101 of generation.
In controlling brancher, the time structure that timing sequencer 11 generates as needed is amplified to by high-voltage amplifier 12
Several kilovolts, reaches half-wave voltage and be used to drive electro-optic crystal 15.
In optical modulation branch, half-wave plate 13 is vertical direction for adjusting oscillation source laser polarization direction；The polarizer
14, vertical direction polarization laser is strengthened, polarization extinction ratio is increased.
Electro-optic crystal 15 receives the switch driving of 12 timing of high-voltage amplifier, so that incident vertical polarization laser has high pressure
When generate half-wave rotation become horizontal vertical direction,
Analyzer 16, separation is by the laser pulse of electro-optic crystal, and in no control voltage, laser keeps vertical inclined
Vibration generates pulse structure shown in Fig. 4 by the lateral escape window of analyzer 16 after the filtering of the second optical filter 19
302,302 thereon square wave be timing control waveform 101.Marking the waveform herein is to express control sequential with by modulation light
Time relationship between pulse 302, the second optical filter 19 being not offered as in lateral optical path are controlled by timing sequencer 11
Generated control waveform 101.The characteristics of laser pulse 302, is there is laser in the low level section of timing control waveform 102
Pulse, and in high level region without laser pulse.
When electro-optic crystal 15 is by half-wave high pressure, laser becomes horizontal polarization, and forward direction passes through analyzer 16 and the first light
After learning filter 17, laser pulse structure laser as shown in the 303 of Fig. 4 is obtained, square wave is corresponding timing control waveform thereon
101.Marking the waveform herein is to express control sequential with being not offered as by the time relationship between modulating light pulse 303
The first optical filter 17 in forward direction optical path, which is controlled by, controls waveform 101 caused by timing sequencer 11.Laser pulse 303
The characteristics of be there is laser pulse in the high level section of timing control waveform 103, and in low level region without laser pulse.
It is to be appreciated that arteries and veins can be obtained on forward light road by adjusting the polarizer 14,15 analyzer 16 of electro-optic crystal
Structure 302 is rushed, pulse structure 303 is obtained on lateral light road.
Forward direction optical path includes a 1030nm optical filter 17 and the first optical fiber collimator 18, so that preceding to laser pulse
Become to contain only 1030nm wavelength, then coupled into optical fibres.Lateral optical path includes a 1040nm optical filter 19 and second
Optical fiber collimator 20 becomes to contain only 1040nm wavelength to laser pulse, then coupled into optical fibres by preceding.It should be noted that
The wavelength that first optical filter 17 and the second optical fiber filter 19 are filtered is different, to carry out in subsequent processing
Separation, obtains required laser pulse.
The laser pulse of above-mentioned two optical path is coupled in an optic fibre light path by fiber coupler 21, which can make
It is coupled with polarization maintaining optical fibre with slow axis, certain two optical paths also can be used simultaneously fast axle coupling, it is therefore an objective to guarantee swashing for two wavelength
Light is consistent by coupler output polarization direction, and the length of two coupling optical paths of suitable control and adjustment is equal as far as possible, couples defeated
Pulse structure is as shown in 304 in Fig. 4 out.The characteristics of laser pulse 304, is to contain in the different sections of timing control waveform
Two kinds of optical maser wavelengths, convenient for relying on different wave length that can be separated using optically filtering method after amplification.As it can be seen that this is practical new
Type fills laser cut-out part with similar another wavelength, and the input power and time structure parameter of such main amplifier do not change
Become, so that the main amplifier of laser remains to steady operation.The laser that this structure is especially very suitable to wide spectrum gain ranging is put
Big device, such as ytterbium doped optical fiber amplifier.
Referring to FIG. 5, showing according to the dual wavelength complementary structure laser pulse generation device of the embodiment of the present application again
One exemplary block diagram.The utility model also provides a kind of dual wavelength complementary structure laser pulse generation device
The polarizer 24, acousto-optic crsytal 25, analyzer 26, the are disposed with along the direction that incident wide spectrum laser advances
One optical filter 27, the first optical fiber collimator 28 and fiber coupler 31, the wide spectrum laser are produced by laser generation source 20
It is raw；
It further include controlling brancher, the controlling brancher includes timing sequencer 21 and radio frequency amplifier 22, and the radio frequency is put
Big device 21 is connect with the acousto-optic crsytal 25, and the radio frequency amplifier 22 amplifies the timing letter that the timing sequencer 21 generates
Number；
It further include lateral optical path between the analyzer 26 and the fiber coupler 31, the lateral optical path includes second
Optical filter 29 and the second optical fiber collimator 30.
The dual wavelength complementary structure laser pulse generation device difference of Fig. 5 and Fig. 1 is, uses radio frequency amplifier and controls
The mode of acousto-optic crsytal.
It similarly, can also include half-wave plate between the polarizer 24 in Fig. 5 and laser generation source 20, for adjusting laser
Polarization direction.Timing sequencer 21 is connect with laser generation source 20, realizes synchronous triggering.
Referring to FIG. 6, showing the exemplary block diagram of the laser pulse generation system according to the embodiment of the present application.This
Utility model further includes a kind of laser pulse generation system, and the system comprises the double waves that each embodiment of the utility model provides
Long complementary structure laser pulse generation device 51, the system also includes: main amplifier 52 and wavelength separator 53.Wavelength separated
Device 53 is the optical filtering apparatus of separable different wave length laser.The dual wavelength complementary structure laser pulse generation device 51 output
Laser pulse enter main amplifier 52 after, two kinds of wavelength are all amplified all in the flat gain region of amplifier, then
Into wavelength separator 23, separated according to different wave length using the method for optically filtering, and retain the pulse structure of needs.Its
In, fiber amplifier can be used in main amplifier 51.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above and (but being not limited to) disclosed herein have it is similar
The technical characteristic of function is replaced mutually and the technical solution that is formed.
Claims (9)
1. a kind of dual wavelength complementary structure laser pulse generation device, which is characterized in that described device includes:
The polarizer, electro-optic crystal, analyzer, the first optically filtering are disposed with along the direction that incident wide spectrum laser advances
Device, the first optical fiber collimator and fiber coupler, the wide spectrum laser are generated by laser generation source；
It further include controlling brancher, the controlling brancher includes timing sequencer and high-voltage amplifier, the high-voltage amplifier and institute
Electro-optic crystal connection is stated, the high-voltage amplifier amplifies the clock signal that the timing sequencer generates；
It further include lateral optical path between the analyzer and the fiber coupler, the lateral optical path includes the second optically filtering
Device and the second optical fiber collimator.
2. dual wavelength complementary structure laser pulse generation device according to claim 1, which is characterized in that first light
It is different to learn the optical maser wavelength that filter and the second optical filter are filtered.
3. dual wavelength complementary structure laser pulse generation device according to claim 2, which is characterized in that the laser vibration
It swings and is provided with half-wave plate between source and the polarizer.
4. dual wavelength complementary structure laser pulse generation device according to claim 3, which is characterized in that
The timing sequencer is connect with the laser generation source, to realize synchronous triggering.
5. dual wavelength complementary structure laser pulse generation device according to claim 4, which is characterized in that the optical fiber coupling
Clutch is polarization-maintaining fiber coupler.
6. dual wavelength complementary structure laser pulse generation device according to claim 4, which is characterized in that first light
It learns filter and the second optical filter is nanoscale optics filter.
7. dual wavelength complementary structure laser pulse generation device according to claim 1, the laser generation source is femtosecond
Laser generation source.
8. a kind of dual wavelength complementary structure laser pulse generation device, which is characterized in that described device includes:
The polarizer, acousto-optic crsytal, analyzer, the first optically filtering are disposed with along the direction that incident wide spectrum laser advances
Device, the first optical fiber collimator and fiber coupler, the wide spectrum laser are generated by laser generation source；
It further include controlling brancher, the controlling brancher includes timing sequencer and radio frequency amplifier, the radio frequency amplifier and institute
Acousto-optic crsytal connection is stated, the radio frequency amplifier amplifies the clock signal that the timing sequencer generates；
It further include lateral optical path between the analyzer and the fiber coupler, the lateral optical path includes the second optically filtering
Device and the second optical fiber collimator.
9. a kind of laser pulse generation system, which is characterized in that the system comprises any double waves of claim 1 to 8
Long complementary structure laser pulse generation device, the system also includes: main amplifier and wavelength separator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820788253.3U CN208299195U (en) | 2018-05-24 | 2018-05-24 | Dual wavelength complementary structure laser pulse generation device and laser pulse generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820788253.3U CN208299195U (en) | 2018-05-24 | 2018-05-24 | Dual wavelength complementary structure laser pulse generation device and laser pulse generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624682A (en) * | 2022-05-17 | 2022-06-14 | 中国科学技术大学 | Method and system for suppressing near field strength echo signal |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624682A (en) * | 2022-05-17 | 2022-06-14 | 中国科学技术大学 | Method and system for suppressing near field strength echo signal |
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Granted publication date: 20181228 |