CN201417355Y - A crystal frequency multiplier - Google Patents
A crystal frequency multiplier Download PDFInfo
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- CN201417355Y CN201417355Y CN2009201390540U CN200920139054U CN201417355Y CN 201417355 Y CN201417355 Y CN 201417355Y CN 2009201390540 U CN2009201390540 U CN 2009201390540U CN 200920139054 U CN200920139054 U CN 200920139054U CN 201417355 Y CN201417355 Y CN 201417355Y
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- crystal
- nonlinear crystal
- frequency multiplier
- reflecting
- light path
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The utility model relates to laser field, and particularly relates to crystal frequency multiplier field. The crystal frequency multiplier disclosed in the utility model comprises a nonlinear crystal,wherein two sides of the nonlinear crystal are provided with a group of reflecting members; reflecting planes of the reflecting members face the nonlinear crystal. Further, the reflecting member is distributed with a plurality of reflecting planes; two reflecting planes with same light path are vertical to each other, and reflect the light path to be parallel upper and lower and space transplacement. The utility model adopts above technical project, and is provided with advantages like simple and reasonable structure, and the nonlinear crystal needn't to be very big because the light path ismade to pass the nonlinear crystal multitimes, which reduces cost of the crystal frequency multiplier.
Description
Technical field
The utility model relates to laser field, relates in particular to the crystal frequency multiplier field.
Background technology
At laser field, obtain short wavelength laser output by nonlinear crystal and become common method, continuous light is adopted the intracavity frequency doubling mode more, its structure is complicated.The continuous light cavity external frequency multiplication is adopted ring cavity structure more, and the control in chamber is very difficult, and fundamental frequency light single is by nonlinear crystal, and frequency-doubling conversion efficiency is low.Under the approximate situation of small-signal, shg efficiency is directly proportional with the nonlinear crystal length square, and size is difficult to do very greatly but nonlinear crystal costs an arm and a leg simultaneously usually.
The Chinese patent publication number is that the technical scheme of CN1983745 proposes a kind of structure and makes fundamental frequency light repeatedly by frequency-doubling crystal, and equivalence prolongs the operating distance of fundamental frequency light and frequency doubled light, thus the frequency-doubling conversion efficiency of raising fundamental frequency light.Because this technical scheme has been ignored vertical fundamental frequency light and the frequency doubled light relative phase problem that causes during by crystal with frequency doubled light of fundamental wave, when fundamental frequency light repeatedly passes through crystal, the zone that the output power of harmonic wave has disappears mutually, rise mutually in the zone that has, can not guarantee consistance by machining process, therefore lose the practical application meaning.
The utility model content
At the problems referred to above, the necessity that the utility model proposes is arranged.The utility model proposes a kind of simple and reasonable, and the crystal frequency multiplier structure that is easy to process.
The utility model adopts following technical scheme:
Crystal frequency multiplier of the present utility model comprises a nonlinear crystal, and the both sides of described nonlinear crystal are provided with one group of reflecting member, and the reflecting surface of reflecting member is all towards described nonlinear crystal.Further, be distributed with a plurality of reflectings surface on the described reflecting member, two reflectings surface of same optical path are perpendicular to one another, and light path are reflected into the round light path of parallel up and down and spatial offset.
Further, described reflecting member can have dual mode: zigzag is distributed with a plurality of reflectings surface on the described reflecting member, and adjacent reflecting surface is perpendicular to one another.Perhaps, be distributed with 2 reflectings surface on the described reflecting member, described 2 reflectings surface are perpendicular to one another, and the middle part of reflecting member is a hollow out so that emergent light passes through.
Further, described nonlinear crystal can have dual mode: described nonlinear crystal is that 2 gummeds are holistic uniform thickness and nonlinear crystal that symmetrical is placed.Perhaps, described nonlinear crystal is 1 holistic noncritical phase matching crystal.It can be a frequency-doubling crystal, also other higher hamonic wave crystal, and as frequency tripling, quadruple, five frequencys multiplication or and crystal etc. frequently.
Further, insert correcting lens in the light path of described reflecting surface, bring hot spot to become big, increase condition mutually but the first-harmonic that lens are introduced should satisfy light intensity with the higher hamonic wave phasic difference to reduce beam divergence.Perhaps, insert wedge phase compensation sheet in the light path of described reflecting surface, be used to eliminate fundamental frequency light and frequency doubled light because the caused phasic difference of chromatic dispersion when long of reflecting free space optical path, or because when adopting solid prism as folding mirror, the phasic difference that produces between fundamental frequency light and frequency doubled light so that laser during by laser instrument frequency doubled light always be in the growth state.
The utility model adopts as above technical scheme, have simple and reasonable, the advantage that is easy to process, and owing to be to make light path, so nonlinear crystal do not need to do very greatly, reduces the cost of crystal frequency multiplier repeatedly by nonlinear crystal.
Description of drawings
Fig. 1 is the structural representation of embodiment one of the present utility model;
Fig. 2 is the structural representation of embodiment two of the present utility model;
Fig. 3 is the structural representation of embodiment three of the present utility model;
Fig. 4 is the structural representation of embodiment four of the present utility model.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Crystal frequency multiplier of the present utility model comprises a nonlinear crystal, and the both sides of described nonlinear crystal are provided with one group of reflecting member, and the reflecting surface of reflecting member is all towards described nonlinear crystal.Be distributed with a plurality of reflectings surface on the described reflecting member, two reflectings surface of same optical path are perpendicular to one another, and light path are reflected into the round light path of parallel up and down and spatial offset, so repeatedly by described nonlinear crystal.Described reflecting member and described nonlinear crystal can have dual mode.
Consulting shown in Figure 1 is embodiment one structural representation of the present utility model.Wherein, 1011,1012 is the nonlinear crystal that uniform thickness and symmetrical are placed, it can be a frequency-doubling crystal, and also other higher hamonic wave crystal are as frequency tripling, quadruple, five frequencys multiplication or and crystal etc. frequently, and compose an one-piece construction, 1021,1022 is the reflecting member of a pair of first kind of embodiment, zigzag is distributed with a plurality of reflectings surface on the described reflecting member, and adjacent reflecting surface is perpendicular to one another.Incident light 1001 is by behind the nonlinear crystal 1011,1012, first reflecting surface of member 1022 of being reflected reflexes to the second vertical with it reflecting surface, second reflecting surface reflects light beam 1002 again, once more by nonlinear crystal 1012,1011, be reflected again first reflecting surface of member 1021 of the outgoing beam 1002 of nonlinear crystal 1012,1011 reflexes to the second vertical with it reflecting surface, second reflecting surface reflects light beam again by nonlinear crystal 1011,1012, light path principle is so analogized, until outgoing beam 100n.
But nonlinear crystal 1012, the 1011 cancellation fundamental waves that uniform thickness and symmetrical are placed bring apart between first-harmonic and the higher hamonic wave by nonlinear crystal 1012,1011 o'clock by the Work-off effect.
Behind the logical nonlinear crystal 1012,1011 of fundamental wave, member 1021 or the distance of 1022 translations of being reflected enters nonlinear crystal 1012,1011 once more, is zero or approaching zero owing to reflecting member 1021,1022 adopts hollow catoptron can ignore air refraction to first-harmonic and high order, repeatedly disappears mutually by the nonlinear crystal high order glistening light of waves and first-harmonic interference enhancing rather than interference frequently in 1012,1011 o'clock with assurance.
Shown in Figure 2 is embodiment two structural representations of the present utility model.Its light path principle and embodiment one shown in Figure 1 are similar.Just adopt the reflecting member of the second way.Be distributed with 2 reflectings surface on described second kind of reflecting member 1031,1032, described 2 reflectings surface are perpendicular to one another, and the middle part of reflecting member is a hollow out so that emergent light passes through.Incident light 1001 is by behind the nonlinear crystal 1011,1012, first reflecting surface of member 1032 of being reflected reflexes to the second vertical with it reflecting surface, second reflecting surface reflects light beam 1002 again, once more by nonlinear crystal 1012,1011, be reflected again second reflecting surface of member 1031 of the outgoing beam 1002 of nonlinear crystal 1012,1011 reflexes to the first vertical with it reflecting surface, first reflecting surface reflects light beam again by nonlinear crystal 1011,1012, light path principle is so analogized, until the reflecting member 1032 outgoing beam 100n of middle part hollow out.Fundamental wave is imported from prism side, and higher hamonic wave also can adopt opposite way to realize near the outgoing hollow out center of prism.
The utility model also can add correcting lens in light path.Consult shown in Figure 3, in the light path of described reflecting surface, insert correcting lens 1031,1032 ... 103n, bring hot spot to become big to reduce beam divergence, but the first-harmonic that lens are introduced should satisfy light intensity with the higher hamonic wave phasic difference and increase condition mutually, and nonlinear crystal 1013 is the noncritical phase matching crystal of an integral body, similar with gummed all-in-one-piece nonlinear crystal 1011,1012, other light path principles repeat no more in this with above-mentioned consistent.
Consult shown in Figure 4, in the light path of described reflecting surface, insert wedge phase compensation sheet 1051,1052 ... 105n is used to eliminate fundamental frequency light and frequency doubled light because the caused phasic difference of chromatic dispersion when long of reflecting free space optical path; Or because when adopting solid prism as folding mirror, the phasic difference that produces between fundamental frequency light and frequency doubled light.So that laser during by laser instrument frequency doubled light always be in the growth state.
Different reflecting member of the present utility model and nonlinear crystal can combination in any, explanations no longer one by one.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection domain of the present utility model.
Claims (7)
1. crystal frequency multiplier, comprise a nonlinear crystal, the both sides of described nonlinear crystal are provided with one group of reflecting member, the reflecting surface of reflecting member is all towards described nonlinear crystal, it is characterized in that: be distributed with a plurality of reflectings surface on the described reflecting member, two reflectings surface of same optical path are perpendicular to one another, and light path are reflected into the round light path of parallel up and down and spatial offset.
2. crystal frequency multiplier according to claim 1 is characterized in that: zigzag is distributed with a plurality of reflectings surface on the described reflecting member, and adjacent reflecting surface is perpendicular to one another.
3. crystal frequency multiplier according to claim 1 is characterized in that: be distributed with 2 reflectings surface on the described reflecting member, described 2 reflectings surface are perpendicular to one another, and the middle part of reflecting member is a hollow out so that emergent light passes through.
4. crystal frequency multiplier according to claim 1 is characterized in that: described nonlinear crystal is that 2 gummeds are holistic uniform thickness and nonlinear crystal that symmetrical is placed.
5. crystal frequency multiplier according to claim 1 is characterized in that: described nonlinear crystal is 1 holistic noncritical phase matching crystal.
6. crystal frequency multiplier according to claim 1 is characterized in that: insert correcting lens in the light path of described reflecting surface.
7. crystal frequency multiplier according to claim 1 is characterized in that: insert wedge phase compensation sheet in the light path of described reflecting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201390540U CN201417355Y (en) | 2009-06-23 | 2009-06-23 | A crystal frequency multiplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201390540U CN201417355Y (en) | 2009-06-23 | 2009-06-23 | A crystal frequency multiplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201417355Y true CN201417355Y (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201390540U Expired - Fee Related CN201417355Y (en) | 2009-06-23 | 2009-06-23 | A crystal frequency multiplier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353457A (en) * | 2013-04-23 | 2013-10-16 | 友达光电股份有限公司 | Substrate detection device and method |
-
2009
- 2009-06-23 CN CN2009201390540U patent/CN201417355Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353457A (en) * | 2013-04-23 | 2013-10-16 | 友达光电股份有限公司 | Substrate detection device and method |
| CN103353457B (en) * | 2013-04-23 | 2015-11-18 | 友达光电股份有限公司 | Substrate detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100303 Termination date: 20130623 |