CN100401133C - Method for regulating parallel raster pair - Google Patents
Method for regulating parallel raster pair Download PDFInfo
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- CN100401133C CN100401133C CNB2006100310588A CN200610031058A CN100401133C CN 100401133 C CN100401133 C CN 100401133C CN B2006100310588 A CNB2006100310588 A CN B2006100310588A CN 200610031058 A CN200610031058 A CN 200610031058A CN 100401133 C CN100401133 C CN 100401133C
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- grating
- aperture
- light source
- collimated light
- angle prism
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Abstract
The invention relates to a method for adjusting parallel grating couple, belonging to the femtosecond impulse compression technique, wherein it uses one collimation light source and one right-angle lens, while the right-angle lens can adjust the grating couple parallel. The invention has simple operation and high accuracy, while it will not be limited by the distance between gratings.
Description
Technical field
The present invention relates to the femtosecond pulse compression, is the right control method of a kind of parallel grating.It is parallel that the present invention utilizes right-angle prism to regulate grating pair, has simple to operately, and the precision height is not subjected to the stagger advantage of distance limit of grating pair.
Background technology
The mankind that develop into of chirped pulse amplification successfully provide pulse width in femtosecond magnitude (10 in recent years
-15S), peak power Da Taiwa (10
12W) even clap watts (10
15W) the ultra-intense laser pulse of magnitude, the superhigh intensity (10 after it focuses on
18W/cm
2) have application very widely such as fields such as electronics acceleration.The basic thought of chirped pulse amplification is to introduce positive dispersion by stretcher before amplification, and the different frequency composition that makes pulse is with different speed transmission, thereby in time domain the ultra-short pulse-width expansion of femtosecond magnitude is become hundreds of psecs (10
-12S) even nanosecond (10
-9S) chirped pulse of magnitude, after amplifying step by step again with the positive dispersion in compressor reducer compensation broadening and the amplification process, thereby obtain ultra high power, the output of ultrashort pulse.
Grating pair is the most suitable to provide negative dispersion, so the general grating pair that uses carries out pulse compression in chirped pulse amplification system.Parallel grating proposed [E.B.Treacy, IEEE J.Quantum Electron.QE-5,454 (1969)] to compressor reducer by E.B.Treacy in 1969.Its structure is made up of two first grating 1, first grating 2 and catoptrons 3 that be arranged in parallel as shown in Figure 1.Seed pulse is incident to first grating 1, to second grating 2, in the direction outgoing parallel with incident light, returns along former road to catoptron 3 reflection backs behind its diffraction.
Formerly in the technology, people regulate the parallel of grating pair by a collimated light source 4 with one flat plate glass 6.The first step as shown in Figure 2, is regulated collimated light source 4, and the light that collimated light source 4 is sent returns aperture 5 after 1 reflection of first grating, and it is vertical with first grating 1 promptly to regulate the light that collimated light source 4 sends; Second step, as shown in Figure 3, insert sheet glass 6 between the collimated light source 4 and first grating 1, the light that adjusting sheet glass 6 sends collimated light source 4 returns aperture 5 after sheet glass 6 reflections, and it is vertical with the light that collimated light source 4 sends promptly to regulate sheet glass 6; The 3rd step, as shown in Figure 4, collimated light source 4 and aperture 5 are moved on between the sheet glass 6 and first grating 1, regulate collimated light source 4, make the light that collimated light source 4 sends return aperture 5 after sheet glass 6 reflections, it is vertical with sheet glass 6 promptly to regulate the light that collimated light source 4 sends; The 4th step, as shown in Figure 5, at first according to the putting position of Theoretical Calculation guestimate second grating 2, translation sheet glass 6 then, make the position of sheet glass 6 compare more close second grating 2 with original position, regulate sheet glass 6, the light that makes collimated light source 4 send returns aperture 5 after sheet glass 6 reflections, and it is vertical with the light that collimated light source 4 sends promptly to regulate sheet glass 6;
The 5th step, as shown in Figure 6, translation collimated light source 4 and aperture 5, make the position of collimated light source 4 compare more close second grating 2 with original position, regulate collimated light source 4, make the light that collimated light source 4 sends return aperture 5 after sheet glass 6 reflections, it is vertical with sheet glass 6 promptly to regulate the light that collimated light source 4 sends; The 6th step, as shown in Figure 7, unload sheet glass 6, install second grating 2, regulate second grating 2 and make the light that collimated light source 4 sends after 2 reflections of second grating, return aperture 5, it is vertical with the light that collimated light source 4 sends promptly to regulate second grating 2.So far, we think that first grating 1 is parallel with second grating 2.What deserves to be explained is that this method has strict demand to the depth of parallelism on 6 two surfaces of sheet glass, need two surfaces strict parallel.
The shortcoming of this method is: only be applicable to that two gratings spatially do not stagger or stagger apart from less situation.When two gratings stagger distance bigger the time, must repeating step four and step 5 repeatedly.Owing to the accumulation of error,, have a strong impact on the width of compression pulse and introduce space chirp like this making the depth of parallelism of grating pair be subjected to very big influence.
Summary of the invention
The present invention provides a kind of parallel grating right control method in order to overcome the limitation of above-mentioned technology formerly.This method gymnastics is done simple, precision height, the restriction that is not subjected to grating pair to stagger distance.
Technical solution of the present invention is as follows:
The control method that a kind of parallel grating is right, the device that this method need be used comprises: the adjustment platform of collimated light source, an aperture, a right-angle prism, a height mark and an installation thereof, first grating to be adjusted and second grating, described aperture directly is horizontally fixed on the exit of collimated light source, the height of described height mark is the height of described collimated light source through the emergent light of aperture aperture, and this method comprises the steps:
1. slightly adorn first grating to be adjusted and second grating by design, be as the criterion with first grating, set and regulate collimated light source, make rayed that collimated light source sends through the aperture of aperture and the aperture that returns aperture after first optical grating reflection, it is vertical with first grating promptly to regulate the light that collimated light source sends;
2. between the collimated light source and first grating, insert described right-angle prism, regulate this right-angle prism, the light that collimated light source is sent returns the aperture of aperture after the first right angle face reflection of this right-angle prism, it is vertical with the first right angle face of right-angle prism promptly to regulate the light that collimated light source sends, the emergent light direction of while at the second right angle face of this right-angle prism is provided with described height mark, this right-angle prism of WidFin makes by the height of the outgoing beam of this right-angle prism second right angle face and the height strict conformance of height mark defined;
3. described collimated light source is moved the also second right angle face of the described right-angle prism of direct irradiation, regulate this collimated light source, the light that makes collimated light source returns the aperture of aperture after the second right angle face reflection of right-angle prism, the emergent light direction of promptly regulating collimated light source is parallel with first grating;
4. with right-angle prism to the translation of collimated light source direction, make outgoing luminous energy shine second grating, and ensure that all the time light that collimated light source sends returns the aperture of aperture after the second right angle face reflection of this right-angle prism by the first right angle face of right-angle prism;
5. regulate second grating, the light that collimated light source is sent shines second grating by right-angle prism, and by second optical grating reflection after described right-angle prism returns the aperture of aperture again, so far, first grating is parallel with second grating.
Described height mark can be the benchmark aperture or the slit of ruler or adjustment height.
Compare with first technology, the present invention has following distinguishing feature:
(1) the present invention is simple to operate, the precision height.
(2) the present invention is by using right-angle prism, can obtain same degree of regulation under grating pair staggers the condition of distance arbitrarily.
(3) device used in the present invention all is breadboard device commonly used, obtains easily, need not specially to prepare.
Description of drawings
Fig. 1 gratings compressor structure diagram
Fig. 2～Fig. 7 is that existing typical flat line raster is to the control method synoptic diagram.
Fig. 8～Figure 12 is the right control method synoptic diagram of parallel grating of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
See also Fig. 8～Figure 12 earlier, Fig. 8～Figure 12 is the synoptic diagram of the right control method of parallel grating of the present invention.As seen from the figure, the control method that parallel grating of the present invention is right, be characterised in that the device that this method need be used comprises: collimated light source 4, an aperture 5, a right-angle prism 7, a height mark 8 and the adjustment platform of installing thereof, first grating 1 to be adjusted and second grating 2, described aperture 5 directly is horizontally fixed on the exit of collimated light source 4, the height of described height mark 8 is the height of described collimated light source 4 through the emergent light of aperture 5 apertures, and this method comprises the steps:
1. slightly adorn first grating 1 to be adjusted and second grating 2 by design, be as the criterion with first grating 1, set and regulate collimated light source 4, make collimated light source 4 through rayed that the aperture of aperture 5 sends and after 1 reflection of first grating, return the aperture of aperture 5, it is vertical with first grating 1 promptly to regulate the light that collimated light source 4 sends, as shown in Figure 8;
2. between the collimated light source 4 and first grating 1, insert described right-angle prism 7, regulate this right-angle prism 7, the light that collimated light source 4 is sent returns the aperture of aperture 5 after the first right angle face reflection of this right-angle prism 7, it is vertical with the first right angle face of right-angle prism 7 promptly to regulate the light that collimated light source 4 sends, the emergent light direction of while at the second right angle face of this right-angle prism 7 is provided with described height mark 8, this right-angle prism 7 of WidFin, make by the height of the outgoing beam of this right-angle prism 7 second right angle faces and the height strict conformance of height mark 8 defineds, as shown in Figure 9;
3. described collimated light source 4 is moved the also second right angle face of the described right-angle prism 7 of direct irradiation, regulate this collimated light source 4, the light that makes collimated light source 4 returns the aperture of aperture 5 after the second right angle face reflection of right-angle prism 7, the emergent light direction of promptly regulating collimated light source 4 is parallel with first grating 1, as shown in figure 10;
4. with right-angle prism 7 to collimated light source 4 direction translations, as shown in figure 11, make outgoing luminous energy shine second grating 2, and ensure that all the time light that collimated light source 4 sends returns the aperture of aperture 5 after the second right angle face reflection of this right-angle prism 7 by the first right angle face of right-angle prism 7;
5. regulate second grating 2, the light that collimated light source 4 is sent shines second grating 2 by right-angle prism 7, and is reflected after described right-angle prism 7 returns the aperture of aperture 5 again, as shown in figure 12 by second grating 2.So far, first grating 1 is parallel with second grating 2.
Use therein height mark 8 is the benchmark aperture.
In the present invention: the function of aperture 5 is to be convenient to observe only not returning along original optical path that collimated light source 4 sends; The function of benchmark aperture 8 is to guarantee that the emergent light height of right-angle prism 7 is consistent with the emergent light height of collimated light source 4, and benchmark aperture 8 need not to be fixed on some certain location, moves freely according to actual needs; The function of right-angle prism 7 is to provide reference for mobile collimated light source 4.Because right-angle prism 7 has two mutually perpendicular surfaces, therefore two reference planes have also just been arranged, can be simultaneously on the both direction parallel with vertical, provide reference for mobile collimated light source 4 with first grating 1, and move because right-angle prism 7 can prolong the emergent light direction infinity of collimated light source 4, make that so just using this method regulates the parallel restriction that can not be subjected to grating pair to stagger the distance size of grating pair.
Claims (2)
1. control method that parallel grating is right, be characterised in that the device that this method need be used comprises: a collimated light source (4), an aperture (5), a right-angle prism (7), a height mark (8) and the adjustment platform of installing thereof, first grating (1) to be adjusted and second grating (2), described aperture (5) directly is horizontally fixed on the exit of collimated light source (4), the height of described height mark (8) is the height of described collimated light source (4) through the emergent light of aperture (5) aperture, and this method comprises the steps:
1. slightly adorn first grating (1) to be adjusted and second grating (2) by design, be as the criterion with first grating (1), set and regulate collimated light source (4), make collimated light source (4) through rayed that the aperture of aperture (5) sends and return the aperture of aperture (5) after first grating (1) reflection, it is vertical with first grating (1) promptly to regulate the light that collimated light source (4) sends;
2. between collimated light source (4) and first grating (1), insert described right-angle prism (7), regulate this right-angle prism (7), the light that collimated light source (4) is sent returns the aperture of aperture (5) after the first right angle face reflection of this right-angle prism (7), it is vertical with the first right angle face of right-angle prism (7) promptly to regulate the light that collimated light source (4) sends, the emergent light direction of while at the second right angle face of this right-angle prism (7) is provided with described height mark (8), this right-angle prism of WidFin (7) makes by the height of the outgoing beam of this right-angle prism (7) second right angle faces and the height strict conformance of height mark (8) defined;
3. described collimated light source (4) is moved the also second right angle face of the described right-angle prism of direct irradiation (7), regulate this collimated light source (4), the light that makes collimated light source (4) returns the aperture of aperture (5) after the second right angle face reflection of right-angle prism (7), the emergent light direction of promptly regulating collimated light source (4) is parallel with first grating (1);
4. with right-angle prism (7) to collimated light source (4) direction translation, make outgoing luminous energy shine second grating (2), and ensure that all the time light that collimated light source (4) sends returns the aperture of aperture (5) after the second right angle face reflection of this right-angle prism (7) by the first right angle face of right-angle prism (7);
5. regulate second grating (2), the light that collimated light source (4) is sent shines second grating (2) by right-angle prism (7), and by second grating (2) reflection after described right-angle prism (7) returns the aperture of aperture (5) again, so far, first grating (1) is parallel with second grating (2).
2. the right control method of parallel grating according to claim 1 is characterised in that benchmark aperture or the slit of described height mark (8) for ruler or adjustment height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100310588A CN100401133C (en) | 2006-09-12 | 2006-09-12 | Method for regulating parallel raster pair |
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|---|---|---|---|
| CNB2006100310588A CN100401133C (en) | 2006-09-12 | 2006-09-12 | Method for regulating parallel raster pair |
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| CN100401133C true CN100401133C (en) | 2008-07-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104280121B (en) * | 2014-10-21 | 2016-05-25 | 中国科学院光电研究院 | A kind of large aperture space heterodyne interference spectrum imager Method of Adjustment |
| CN111211474B (en) * | 2020-01-15 | 2021-05-04 | 中国科学院上海光学精密机械研究所 | Full-width adjusting method of grating compressor based on self-leveling laser line projector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4924084A (en) * | 1987-10-17 | 1990-05-08 | Hoechst Aktiengesellschaft | Device for determining surface moisture |
| US6407804B1 (en) * | 1999-06-04 | 2002-06-18 | Heimann Biometric Systems Gmbh | Assembly for detecting the superficial structures of fingers and/or palms |
| CN1145053C (en) * | 2001-08-27 | 2004-04-07 | 中国科学院上海光学精密机械研究所 | Method for regulating parallelism of raster pair |
| CN1564051A (en) * | 2004-04-06 | 2005-01-12 | 中国科学院上海光学精密机械研究所 | Chirp pulse compressor |
-
2006
- 2006-09-12 CN CNB2006100310588A patent/CN100401133C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4924084A (en) * | 1987-10-17 | 1990-05-08 | Hoechst Aktiengesellschaft | Device for determining surface moisture |
| US6407804B1 (en) * | 1999-06-04 | 2002-06-18 | Heimann Biometric Systems Gmbh | Assembly for detecting the superficial structures of fingers and/or palms |
| CN1145053C (en) * | 2001-08-27 | 2004-04-07 | 中国科学院上海光学精密机械研究所 | Method for regulating parallelism of raster pair |
| CN1564051A (en) * | 2004-04-06 | 2005-01-12 | 中国科学院上海光学精密机械研究所 | Chirp pulse compressor |
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Granted publication date: 20080709 Termination date: 20110912 |