CN102866557B - The how logical pulse stretcher device of monochromatic light grid - Google Patents
The how logical pulse stretcher device of monochromatic light grid Download PDFInfo
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- CN102866557B CN102866557B CN201210357163.6A CN201210357163A CN102866557B CN 102866557 B CN102866557 B CN 102866557B CN 201210357163 A CN201210357163 A CN 201210357163A CN 102866557 B CN102866557 B CN 102866557B
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- logical
- total reflective
- grating
- reflective mirror
- pulse stretcher
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Abstract
The present invention relates to laser technology field, specifically refer to the how logical pulse stretcher device of a kind of monochromatic light grid, it comprises: optical isolator element, for importing and the derivation of incident light and emergent light; Four-way single optical grating expending unit, for the broadening to laser pulse; Logical number control module, for the control to laser pulse stretching multiple.Adopt the how logical pulse stretcher device of the monochromatic light grid of structure of the present invention can when not changing stretcher structure increase pulse stretcher effect at double, and do not need when increasing pulse stretcher effect to regulate light path.In addition, the present invention arbitrarily can control multiple of stretcher, thus the broadening effect of realizing ideal.
Description
Technical field
The present invention relates to laser technology field, specifically refer to the how logical pulse stretcher device of a kind of monochromatic light grid.
Background technology
At present along with the demand to Gao Zhongying, high pulse energy ultrashort pulse laser, also more and more higher to the requirement of its single pulse energy, in order to obtain more single pulse energy, generally need to amplify again the first broadening of ultrashort pulse pulsewidth, energy extraction efficiency can be improved like this and improve damage threshold.But the many employings of existing stretcher is monochromatic light grid four-way broadening mode, this kind of mode will increase broadening effect and just must change parameter and need to readjust light path.
In addition, along with the increase of broadening amount, the volume of stretcher, also along with rapid increase, is made troubles to use.
Summary of the invention
For the defect existed in prior art and problem, the object of the invention is to provide a kind of stretcher that can overcome above-mentioned defect.
The invention provides the how logical pulse stretcher device of a kind of monochromatic light grid, it comprises:
Optical isolator element, for importing and the derivation of incident light and emergent light;
Four-way single optical grating expending unit, for the broadening to femtosecond and Ps Laser Pulse;
Logical number control module, for the control to laser pulse stretching multiple.
Preferably, described optical isolator element comprises film polarizer A, Faraday polarization apparatus and half-wave plate A, and described film polarizer A, Faraday polarization apparatus and half-wave plate A set gradually along incident light beam strikes direction.
More preferably, described optical isolator element also comprises film polarizer C, and described film polarizer C is for reflecting emergent light.
Preferably, described four-way single optical grating expending unit is made up of plane total reflective mirror A, grating, plane total reflective mirror B, 45 ° of total reflective mirrors and concave mirror successively, incident light is by after described logical several control module, after 45 ° of total reflective mirror reflections, be incident to grating, through optical grating diffraction to concave mirror, plane total reflective mirror A is reflexed to through concave mirror, concave mirror is reflected back through plane total reflective mirror A, grating is reflexed to through concave mirror second time, through optical grating diffraction to plane total reflective mirror B, reflect through plane total reflective mirror B, be reflected back logical number control module along original optical path.
More preferably, described grating ruling line direction is vertical with the polarization direction of described incident light.
Preferably, described logical several control module is formed by leading to number controller, film polarizer B and plane total reflective mirror C, described logical number controller, film polarizer B set gradually along described incident light beam strikes direction, and the laser pulse that described plane total reflective mirror C is used for film polarizer B reflects reflects back along original optical path.
More preferably, described logical number controller is Pockers cell.
Preferably, described incident light is horizontal polarization light.
Compared with prior art, the present invention has the following advantages:
1, the present invention can when not changing stretcher structure increase pulse stretcher effect at double;
2, the present invention does not need when increasing pulse stretcher effect to regulate light path;
3, the present invention arbitrarily can control multiple of stretcher, thus the broadening effect of realizing ideal.
Accompanying drawing explanation
Fig. 1 is total index path of the present invention;
Fig. 2 is the index path of optoisolator unit;
Fig. 3 is the index path of four-way single optical grating expending device unit;
Index path when Fig. 4 is logical number controller in logical number controller unit non-making alive;
Index path when Fig. 5 is the logical number controller making alive in logical number controller unit;
Concrete symbol description is as follows;
1-film polarizer A 2-Faraday polarization apparatus
3-half-wave plate A 4-film polarizer B
5-Pockers cell 6-45 ° of total reflective mirror
7-grating 8-concave mirror
9-plane total reflective mirror A 10-plane total reflective mirror B
11-plane total reflective mirror C 12-film polarizer C
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, in one embodiment of the invention, the invention provides the how logical pulse stretcher device of a kind of monochromatic light grid, it comprises: optical isolator element, and for importing and the derivation of incident light and emergent light, wherein incident light is horizontal polarization light; Four-way single optical grating expending unit, for the broadening to laser pulse; Logical number control module, for the control to laser pulse stretching multiple.
As shown in Figure 2, the optical isolator element in the present invention comprises film polarizer A1, Faraday polarization apparatus 2 and half-wave plate A3, and wherein film polarizer A1, Faraday polarization apparatus 2 and half-wave plate A3 set gradually along incident light beam strikes direction.First incident light is first by film polarizer A1, then by Faraday polarization apparatus 2, now the polarization direction of incident light rotates forward 45 °, then by half-wave plate A3, the polarization direction then reverse rotation 45 ° of incident light, it is incident that incident light like this keeps horizontal polarization direction to continue.Because the optical direction of half-wave plate A1 is relevant with incident direction, and the optical direction of Faraday polarization apparatus 2 and incident direction have nothing to do, so the emergent light penetrated from logical several control module is by after half-wave plate A3, the polarization direction of emergent light rotates forward 45 °, again by after Faraday polarization apparatus 2, outgoing polarisation of light oppositely rotates forward 45 ° again, and now emergent light becomes orthogonal polarized light, is exporting through film polarizer A1 back reflection.
In a preferred embodiment of the invention, optoisolator unit also comprises film polarizer C12, and film polarizer C12, for reflecting emergent light, can make emergent light parallel with the incident direction of incident light like this.
As shown in Figure 3, four-way single optical grating expending unit in the present invention comprises successively by plane total reflective mirror A9, grating 7, plane total reflective mirror B10, 45 ° of total reflective mirrors 6 and concave mirror 8 are formed, incident light is by after logical number control module, to be incident to grating 7 slightly larger than Littrow angle first time after 45 ° of total reflective mirrors 6 reflect, concave mirror 8 is diffracted into through grating 7, plane total reflective mirror A9 is reflexed to through concave mirror 8, concave mirror 8 is reflected back through plane total reflective mirror A9, grating 7 is reflexed to through concave mirror 8 second time, plane total reflective mirror B10 is diffracted into through grating 7, reflect through plane total reflective mirror B10, logical number control module is reflected back into along original optical path.
In a preferred embodiment of the invention, the score line direction of grating 7 is vertical with horizontal polarization polarisation of light direction, now very high to the efficiency of horizontal polarization optical diffraction, generally can reach more than 95%.
As shown in Figures 4 and 5, logical several control module in the present invention is formed by leading to number controller, film polarizer B4 and plane total reflective mirror C11, logical number controller and film polarizer B4 set gradually along described polarized light incident direction, wherein logical number controller can be Pockers cell 5, and the laser pulse that described plane total reflective mirror C11 is used for film polarizer B4 reflects reflects back along original optical path.
When Pockers cell 5 non-making alive, incident horizontal polarization light is first after Pockers cell 5, horizontal state of polarization is kept to enter four-way monochromatic light grid pulse stretcher device, light after broadening is still horizontal polarization light, return logical number control module along former road, and keep horizontal state of polarization to pass through number control module.
When Pockers cell 5 adds half-wave voltage, incident horizontal polarization light is by after Pockers cell 5, polarization state half-twist, vertical polarization is become by horizontal polarization, after entering four-way monochromatic light grid pulse stretcher unit, because grating 7 pairs of vertical polarization light diffraction efficiencies are extremely low, after laser pulse passes through grating 8 diffraction four times, can think without back light, and when the pulse that Pockers cell 5 pressurization advances into four-way monochromatic light grid pulse stretcher device returns logical number controller, because Pockers cell 5 adds half-wave voltage, by its polarization state half-twist after Pockers cell 5, perpendicular polarisation state is become by horizontal state of polarization, plane total reflective mirror C11 is reflexed at film polarizer B4 place, after plane total reflective mirror C11 reflects, former road returns and again retrodeviates polarization state half-twist again through Pockers cell 5, revert to horizontal state of polarization and enter four-way monochromatic light grid pulse stretcher unit, so by controlling Pockers cell pressing time, the number of times entering four-way monochromatic light grid pulse stretcher device can be controlled, and then realize eight lead to, 16 lead to, 30 two-ways etc. pulse stretcher.
Certainly, what adopt above-mentioned optimal technical scheme just to carry out the present invention for the ease of understanding illustrates, the present invention also can have other embodiments, and protection scope of the present invention is not limited to this.When not deviating from the present invention's spirit and essence thereof, person of ordinary skill in the field is when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to claim of the present invention.
Claims (7)
1. the how logical pulse stretcher device of monochromatic light grid, is characterized in that, comprising:
Optical isolator element, for importing and the derivation of incident light and emergent light;
Four-way single optical grating expending unit, for the broadening to femtosecond and Ps Laser Pulse;
Logical number control module, for the control to laser pulse stretching multiple;
Described logical several control module is formed by leading to number controller, film polarizer B (4) and plane total reflective mirror C (11);
Wherein, described logical number controller is Pockers cell (5);
By controlling described Pockers cell (5) pressing time, controlling to enter the number of times of described four-way single optical grating expending unit, realizing pulse stretcher that is eight logical, 16 logical, 30 two-ways.
2. the how logical pulse stretcher device of monochromatic light grid according to claim 1, it is characterized in that, described optical isolator element comprises film polarizer A (1), Faraday polarization apparatus (2) and half-wave plate A (3), and described film polarizer A (1), Faraday polarization apparatus (2) and half-wave plate A (3) set gradually along incident light beam strikes direction.
3. the how logical pulse stretcher device of monochromatic light grid according to claim 2, is characterized in that, described optical isolator element also comprises film polarizer C (12), and described film polarizer C (12) is for reflecting emergent light.
4. the how logical pulse stretcher device of monochromatic light grid according to claim 1, it is characterized in that, described four-way single optical grating expending unit is successively by plane total reflective mirror A (9), grating (7), plane total reflective mirror B (10), 45 ° of total reflective mirrors (6) and concave mirror (8) are formed, incident light is by after described logical several control module, after 45 ° of total reflective mirror (6) reflections, be incident to grating (7), concave mirror (8) is diffracted into through grating (7), plane total reflective mirror A (9) is reflexed to through concave mirror (8), concave mirror (8) is reflected back through plane total reflective mirror A (9), grating (7) is reflexed to through concave mirror (8) second time, plane total reflective mirror B (10) is diffracted into through grating (7), reflect through plane total reflective mirror B (10), logical number control module is reflected back along original optical path.
5. the how logical pulse stretcher device of monochromatic light grid according to claim 4, is characterized in that, described grating (7) score line direction is vertical with the polarization direction of described incident light.
6. the how logical pulse stretcher device of monochromatic light grid according to claim 1, it is characterized in that, described logical number controller, film polarizer B (4) set gradually along described incident light beam strikes direction, and described plane total reflective mirror C (11) reflects back along original optical path for the laser pulse reflected by film polarizer B (4).
7. the how logical pulse stretcher device of the monochromatic light grid according to any one of claim 1-6 claim, is characterized in that, described incident light is horizontal polarization light.
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| CN201210357163.6A CN102866557B (en) | 2012-09-21 | 2012-09-21 | The how logical pulse stretcher device of monochromatic light grid |
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| CN201210357163.6A CN102866557B (en) | 2012-09-21 | 2012-09-21 | The how logical pulse stretcher device of monochromatic light grid |
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| CN102866557A CN102866557A (en) | 2013-01-09 |
| CN102866557B true CN102866557B (en) | 2015-10-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104570379B (en) * | 2015-01-20 | 2017-07-18 | 中国科学院上海应用物理研究所 | A kind of reflection-type grating is to pulse stretcher device |
| CN108767629B (en) * | 2018-03-26 | 2020-11-10 | 中国科学院上海光学精密机械研究所 | Large-energy active multi-pass chirped pulse stretcher |
| CN109407354B (en) * | 2018-11-26 | 2019-09-20 | 杭州奕力科技有限公司 | A kind of tunable pulse broadening device of transmission-type monochromatic light grid multi-pass |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5329398A (en) * | 1992-11-05 | 1994-07-12 | Novatec Laser Systems, Inc. | Single grating laser pulse stretcher and compressor |
| CN101840125A (en) * | 2010-04-21 | 2010-09-22 | 北京大学 | Negative dispersion pulse widening optical fiber amplifying device |
-
2012
- 2012-09-21 CN CN201210357163.6A patent/CN102866557B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5329398A (en) * | 1992-11-05 | 1994-07-12 | Novatec Laser Systems, Inc. | Single grating laser pulse stretcher and compressor |
| CN101840125A (en) * | 2010-04-21 | 2010-09-22 | 北京大学 | Negative dispersion pulse widening optical fiber amplifying device |
Non-Patent Citations (2)
| Title |
|---|
| 低重复率的Ti：Al2O3飞秒激光放大器研究;侯洵 等;《光子学报》;19970331;第26卷(第3期);第193-194页 * |
| 八通式单光栅展宽器的特性研究;杨建军 等;《光子学报》;19980430;第27卷(第4期);第323页第1段到第324页最后1段 * |
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