CN209016422U - A kind of optical pulse compressor - Google Patents
A kind of optical pulse compressor Download PDFInfo
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- CN209016422U CN209016422U CN201822143238.6U CN201822143238U CN209016422U CN 209016422 U CN209016422 U CN 209016422U CN 201822143238 U CN201822143238 U CN 201822143238U CN 209016422 U CN209016422 U CN 209016422U
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- splitter prism
- beam splitter
- polarization beam
- slide
- polarization
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Abstract
The utility model relates to optical technical field more particularly to a kind of optical pulse compressors.Including compressor housing (102), the first polarization beam splitter prism (103) are equipped in the compressor housing (102), first slide (104), body Compressed grating (105), second slide (106) and the second polarization beam splitter prism (107), wherein: light beam (101) to be compressed transmits after entering compressor housing (102) by the first polarization beam splitter prism (103), pass through the first slide (104), into body Compressed grating (105), light beam passes through the first slide (104) second in the reflection of body Compressed grating (105) Central Plains road, the first polarization beam splitter prism (103) are entered for the second time, then the second polarization beam splitter prism (107) are reflexed to, light beam reflexes to the second slide (10 in the second polarization beam splitter prism (107) 6), enter body Compressed grating (105) second.The decrement of this optical pulse compressor is larger.
Description
Technical field
The utility model relates to optical technical field more particularly to a kind of optical pulse compressors.
Background technique
Ultrafast laser has many advantages, such as ultrahigh peak power, high light beam quality as a kind of cold work tool.It is super at present
Fast laser is based on solid state laser, but with the increase of application demand and flexibility, and solid state laser is due to its volume
Greatly, water cooling, easily it is affected by environment the disadvantages of, limit the ultrafast application of solid.And optical fiber ultrafast laser due to its is small in size,
Non-maintaining, the advantages that type of cooling is simple, it will gradually replace solid ultrafast laser.
However since the fibre-optic mode field diameter of ultrafast optical fiber laser is smaller, peak-power limited, it is difficult to realize peak value
Power and high pulse energy output.When the feasible scheme of former is broadened pulse, then using pulse chirp amplifying technique
Amplification, is finally compressed again, realizes the promotion of pulse peak power and pulse energy.But it is limited to current compressor ruler
Very little limitation, currently used body Compressed grating can only compress 500ps magnitude pulse width, so that pulse is in amplification process
In, pulse can only be broadened to 500ps magnitude, pulse energy promotion is still limited.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of biggish optical pulse compressors of decrement.
The technical scheme adopted by the utility model is a kind of optical pulse compressor, including compressor housing, feature exist
In: the first polarization beam splitter prism, the first slide, body Compressed grating, the second slide and the second polarization are equipped in compression case body
Beam splitter prism, in which:
Light beam to be compressed transmits after entering compressor housing by the first polarization beam splitter prism, passes through the first slide, light beam
Phase increases pi/2, and into body Compressed grating, light beam passes through the first slide, light beam second in the reflection of body Compressed grating Central Plains road
Phase is further added by pi/2, enters the first polarization beam splitter prism for the second time, then reflexes to the second polarization beam splitter prism, and light beam exists
The second slide is reflexed in second polarization beam splitter prism, beam phase increases pi/2, enters body Compressed grating for the second time, and light beam exists
For the second time by the second slide, beam phase is further added by pi/2, enters second for the second time later the reflection of body Compressed grating Central Plains road
Polarization beam splitter prism.
Preferably, it further includes third polarization beam splitter prism, the 4th polarization beam splitter prism and isolator, in which:
Light beam enters after the second polarization beam splitter prism that be transmitted into third by the second polarization beam splitter prism inclined for the second time
Shake beam splitter prism, is then reflected by third polarization beam splitter prism to the 4th polarization beam splitter prism, later partially by the 4th
It shakes after beam splitter prism reflects and enters isolator, finally export.
Preferably, it further include first to broadened beam and second to broadened beam, and first to broadened beam and
Two are redirected back into body Compressed grating to broadened beam, and two beams wait for that broadened beam and two beams for injecting body Compressed grating are to be compressed
Light beam is parallel.
Preferably, light beam to be compressed is linearly polarized light.
Preferably, the first slide and the second slide are a quarter slide, and the master of the first slide and the second slide
Axis respectively with light beam polarization angular separation π/4.
Preferably, the reflectivity of body Compressed grating is greater than 90%.
Preferably, the first polarization beam splitter prism, the first slide, the second slide, the second polarization beam splitter prism, third polarize
The mirror surface flatness of beam splitter prism and the 4th polarization beam splitter prism is more than or equal to 1/8 wavelength accuracy.
Preferably, the first polarization beam splitter prism, the first slide, the second slide, the second polarization beam splitter prism, third polarize
The front and rear surfaces of beam splitter prism and the 4th polarization beam splitter prism are coated with high transmittance film, and the transmissivity of high transmittance film is more than or equal to
99.5%。
Preferably, being equipped with radiator in compression case body.
Preferably, being additionally provided with lens group between the 4th polarization beam splitter prism and isolator.
Using the above structure compared with prior art, the utility model has the advantage that the utility model devises one
Kind round trip pulse compression system, pulse is reflected twice in compressor, so that the decrement of compressor is promoted one times, and will
Pulse broadening is integrated in pulse shortener, saves traditional pulse broadening grating, and realize that precision pulse width matches；
And then reduce ultrafast laser middle arteries punching press contracting, broadening cost；Due to the design of Highgrade integration, the stabilization of system is improved
Property.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of optical pulse compressor of the utility model.
It is as shown in the figure: 101, light beam to be compressed；102, compressor housing；103, the first polarization beam splitter prism；104, first
Slide；105, body Compressed grating；106, the second slide；107, the second polarization beam splitter prism；108, third polarization beam splitter prism；
109, the 4th polarization beam splitter prism；110, isolator；111, first to broadened beam；112, second to broadened beam.
Specific embodiment
The utility model is described further below in conjunction with attached drawing and specific embodiment, but the utility model is not only
It is limited to following specific embodiments.
A kind of optical pulse compressor, including compressor housing 102, compressor housing 102 is interior to be equipped with the first polarization beam splitting rib
Mirror 103, the first slide 104, body Compressed grating 105, the second slide 106, the second polarization beam splitter prism 107, third polarization beam splitting
Prism 108, the 4th polarization beam splitter prism 109 and isolator 110, and light beam needs compression light beam 101, the first light to be broadened
Beam 111 and second is to broadened beam 112, wherein
Light beam 101, first to be compressed is collimated light beam to broadened beam 112 to broadened beam 111 and second, and first
It to broadened beam 111 and second to broadened beam 112, is redirected back into body Compressed grating 105 respectively, realizes seed optical pulse exhibition
It is wide.Due to broadening and compressing the same individual Compressed grating 105 of process, the accurate matching of pulse dispersion amount may be implemented.
And light beam 101 to be compressed centainly needs to be linearly polarized light, otherwise, after the first polarization beam splitter prism 103, has relatively strong sharp
Light is reflected on compressor shell 102.And the 4 light beams needs in body Compressed grating are strictly parallel, cannot overlap, no
Then, signal can mutual crosstalk between laser.Influence system exports quality.
Four polarization beam splitter prisms can also be referred to as PBS；
First slide 104 and the second slide 106 are a quarter slide, and the main shaft of two a quarter slides,
Respectively with light polarization direction angle π/4, light beam could be made to pass twice through a quarter slide, change of polarized direction pi/2 in this way.
It is greater than 90% according to reflection efficiency, the biggish body Compressed grating 105 of cross-sectional area, then light beam can be realized 2 times or more
Bigger pulse decrement is realized in compression；This mode depends primarily on, and whether multiple laser, which is able to maintain, does not overlap independently, and
Acceptable laser compression efficiency.
Influence in order to avoid optical element to laser beam beam quality, optical element mirror surface flatness are not lower than 1/
8 wavelength accuracies.
In order not to reduce laser delivery efficiency, all optical element front and rear surfaces should be coated with high transmittance film, high transmittance film transmission
Efficiency is not lower than 99.5%.
In high power system, necessary radiator needs to increase in the compressor shell 102 that hot spot may reach
Wall position can be set to water cooling plant, air cooling equipment also can be set into.
If desired change laser spot diameter, necessity can be increased between the 4th polarization beam splitter prism 109 and isolator 110
Lens group, realize spot diameter variation.
Isolator 110 can be bipolar separators (i.e. 2 single-stage isolated devices), may be mounted at body Compressed grating 105 it
Afterwards, it can also install to 105 rear and front end of body Compressed grating between body Compressed grating 105, can also be separately mounted to.
Its working principle is that: light beam 101 to be compressed is linearly polarized light, and drafting input light beam is horizontal polarization, then first partially
Beam splitter prism 103 shake for horizontal polarization transmission, vertical polarization is reflected；Second polarization beam splitter prism 107 is horizontal polarization transmission, is hung down
Straight reflection of polarization；Third polarization beam splitter prism 108 is horizontal polarization reflection, normal transmission.If (light beam 101 to be compressed is vertical
Light beam, then 3 polarization beam splitter prisms are reversed.) light beam 101 to be compressed enters in compressor housing 102, partially by first
The beam splitter prism 103 that shakes transmits, and by the first slide 104, beam phase increases pi/2, and into body Compressed grating 105, laser is in body
Gradually former road reflection in Compressed grating 105 enters back into the first slide 104, and beam phase is further added by pi/2, and light beam becomes vertical inclined
Vibration light beam reflexes to the second polarization beam splitter prism 107 into after the first polarization beam splitter prism 103；Since light beam is vertical inclined
Vibration, reflexes to the second slide 106 in the second polarization beam splitter prism 107, enters in Compressed grating 105 for the second time, light beam is in body
The second slide 106 is reflected back in Compressed grating 105, because being to pass twice through the second slide 106, phase is further added by π, light beam
Become horizontal polarization, is transmitted by the second polarization beam splitter prism 107, it is inclined by third into third polarization beam splitter prism 108
Shake beam splitter prism 108 and the 4th polarization beam splitter prism 109, is reflected into isolator, finally exports.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of skill in the art that its according to
It can so modify to technical solution documented by previous embodiment, or part of technical characteristic is replaced on an equal basis
It changes；And these are modified or replaceed, and the essence of corresponding technical solution is not made to be detached from various embodiments of the utility model technical side
The spirit and scope of case.
Claims (10)
1. a kind of optical pulse compressor, including compressor housing (102), it is characterised in that: set in the compressor housing (102)
There are the first polarization beam splitter prism (103), the first slide (104), body Compressed grating (105), the second slide (106) and second partially
It shakes beam splitter prism (107), in which:
Light beam (101) to be compressed transmits after entering compressor housing (102) by the first polarization beam splitter prism (103), by the
One slide (104), beam phase increase pi/2, and into body Compressed grating (105), light beam is anti-on body Compressed grating (105) Central Plains road
Second is penetrated by the first slide (104), beam phase is further added by pi/2, enters the first polarization beam splitter prism for the second time
(103), it then reflexes to the second polarization beam splitter prism (107), light beam reflexes to second in the second polarization beam splitter prism (107)
Slide (106), beam phase increase pi/2, enter body Compressed grating (105) for the second time, light beam is in body Compressed grating (105) Central Plains
For the second time by the second slide (106), beam phase is further added by pi/2, enters the second polarization beam splitting for the second time later for road reflection
Prism (107).
2. a kind of optical pulse compressor according to claim 1, it is characterised in that: it further includes third polarization beam splitter prism
(108), the 4th polarization beam splitter prism (109) and isolator (110), in which:
Light beam is transmitted into after entering the second polarization beam splitter prism (107) for the second time by the second polarization beam splitter prism (107)
Third polarization beam splitter prism (108) is then reflected by third polarization beam splitter prism (108) to the 4th polarization beam splitter prism
(109), enter isolator (110) after the reflection of the 4th polarization beam splitter prism (109) later, finally export.
3. a kind of optical pulse compressor according to claim 1, it is characterised in that: it further includes first to broadened beam
(111) with second to broadened beam (112), and described first is reversed to broadened beam (112) to broadened beam (111) and second
Into body Compressed grating (105), and two beams wait for that broadened beam is parallel with the two beams light beam to be compressed of body Compressed grating is injected.
4. a kind of optical pulse compressor according to claim 1, it is characterised in that: the light beam (101) to be compressed is line
Polarised light.
5. a kind of optical pulse compressor according to claim 1, it is characterised in that: first slide (104) and second
Slide (106) is a quarter slide, and the main shaft of the first slide and the second slide respectively with light beam polarization angular separation π/
4。
6. a kind of optical pulse compressor according to claim 1, it is characterised in that: the body Compressed grating (105) it is anti-
Rate is penetrated greater than 90%.
7. a kind of optical pulse compressor according to claim 2, it is characterised in that: first polarization beam splitter prism
(103), the first slide (104), the second slide (106), the second polarization beam splitter prism (107), third polarization beam splitter prism (108)
And the 4th polarization beam splitter prism (109) mirror surface flatness be more than or equal to 1/8 wavelength accuracy.
8. a kind of optical pulse compressor according to claim 2, it is characterised in that: first polarization beam splitter prism
(103), the first slide (104), the second slide (106), the second polarization beam splitter prism (107), third polarization beam splitter prism (108)
And the 4th the front and rear surfaces of polarization beam splitter prism (109) be coated with high transmittance film, and the transmissivity of high transmittance film is more than or equal to
99.5%。
9. a kind of optical pulse compressor according to claim 1, it is characterised in that: set in the compressor housing (102)
There is radiator.
10. a kind of optical pulse compressor according to claim 2, it is characterised in that: the 4th polarization beam splitter prism
(109) lens group is additionally provided between isolator (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822143238.6U CN209016422U (en) | 2018-12-20 | 2018-12-20 | A kind of optical pulse compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822143238.6U CN209016422U (en) | 2018-12-20 | 2018-12-20 | A kind of optical pulse compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209016422U true CN209016422U (en) | 2019-06-21 |
Family
ID=66844067
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822143238.6U Active CN209016422U (en) | 2018-12-20 | 2018-12-20 | A kind of optical pulse compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599738A (en) * | 2018-12-20 | 2019-04-09 | 武汉光至科技有限公司 | A kind of optical pulse compressor |
-
2018
- 2018-12-20 CN CN201822143238.6U patent/CN209016422U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599738A (en) * | 2018-12-20 | 2019-04-09 | 武汉光至科技有限公司 | A kind of optical pulse compressor |
| CN109599738B (en) * | 2018-12-20 | 2024-03-12 | 武汉光至科技有限公司 | Optical pulse compressor |
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