CN100454691C - Three-dimensional potential well laser - Google Patents
Three-dimensional potential well laser Download PDFInfo
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- CN100454691C CN100454691C CNB2007100049272A CN200710004927A CN100454691C CN 100454691 C CN100454691 C CN 100454691C CN B2007100049272 A CNB2007100049272 A CN B2007100049272A CN 200710004927 A CN200710004927 A CN 200710004927A CN 100454691 C CN100454691 C CN 100454691C
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- axicon lens
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Abstract
The invention relates to one three dimensional potential laser, wherein, current laser output bean is of Gauss laser beam and during laser beam process, due to strong center light intensity distribution and weak by circle; when there needs correction, its process laser signal is weak and less accuracy and reliability; the laser adopts positive axis tamper lens and negative axis tamper lens in structure to form laser output couple lens as one part of laser resonance chamber.
Description
Technical field
The present invention relates to a kind of laser, belong to laser technology field.
Background technology
Laser is from inventing till now, and the laser beam of all kinds of various lasers outputs all is a Gaussian laser beam.It is characterized in that light intensity is the strongest on laser beam axis, radially light intensity drops to zero gradually, and light intensity is that Axisymmetric Nonlinear distributes, and similar bell, the light beam that claims light intensity to be distribution like this usually is a Gaussian laser beam.Publish in " Principles of Laser " of writing in National Defense Industry Press (Beijing) by ZhouBing Kun, Gao Yizhi, old unconventional Rong, Chen Jiahua, Gaussian Profile to laser beam intensity is described to some extent, as shown in Figure 1, y axle among the figure is represented laser intensity, x axle among the figure is represented the radial dimension of laser beam, curve in the coordinate system is laser intensity distribution curve radially, is a kind of Gaussian curve.The laser beam that is adopted in the laser-beam riding guidance technical field also is this Gaussian laser beam.For example, in " application of laser technology in weapon industry " book that weapon industry publishing house (Beijing) publishes by the Wei Guanghui chief editor, disclose the technical scheme of a laser-beam riding guidance, be exactly as driving bundle with Gaussian laser beam in this scheme, Gaussian laser beam is carried out the optical modulation coding, make it carry azimuth information, guided missile flies along direction of beam propagation, at any time according to the intrafascicular azimuth information correction heading of driving that is received, realize guidance.
Summary of the invention
Because that the Gaussian laser beam light distribution is the center is strong, a little less than the periphery, when deviation in driction takes place awing and need correct in guided missile, its received guidance laser signal just a little less than, like this be unfavorable in time, guidance efficiently and accurately that accuracy, the reliability of guidance are affected.For a little less than obtaining a kind of light distribution and being the center, laser beam that periphery is strong, we have invented a kind of three-dimensional potential well laser.
The present invention realizes like this, see Fig. 2, shown in Figure 4, three-dimensional potential well laser is made up of semiconductor laser pumping 1, shaping lens 2, laser total reflection mirror 3, active medium 4, positive axis axicon lens 5 and negative axial cone mirror 6, shaping lens 2 is between semiconductor laser pumping 1, the laser total reflection mirror 3, pump light is carried out shaping, positive axis axicon lens 5 and negative axial cone mirror are 6 coaxial, tapering is identical, relative at the bottom of the awl of the vertex of a cone of positive axis axicon lens 5 and negative axial cone mirror 6, the two constitutes the laser output coupling mirror, constitutes laser resonant cavity by laser total reflection mirror 3 and laser output coupling mirror.
Pump light is a kind of Gaussian laser beam, and the effect of shaping lens 2 is that the light distribution of this Gaussian laser beam is compressed on the y direction of principal axis, stretches on the x direction of principal axis, sees shown in Figure 3ly, makes it be accurate Gaussian Profile.The laser beam intensity of vibrating in laser resonant cavity distributes and also therefore is accurate Gaussian Profile.Variation has taken place in its light distribution of light beam through the outgoing of laser output coupling mirror, this process is seen shown in Figure 4, the unpolarized light beam core, reflects and the parallel axes outgoing by negative axial cone mirror 6 because of refraction deflection both sides once again through positive axis axicon lens 5 backs, becomes the marginal portion of emergent light; And the unpolarized light beam marginal portion is middle because of the refraction deflection through positive axis axicon lens 5 backs, reflects once again and the parallel axes outgoing by negative axial cone mirror 6, becomes the core of emergent light.At this moment the laser intensity distribution characteristics sent of laser is seen shown in Figure 5ly, and valley appears in the center, becomes at the bottom of the potential well, light intensity is radially strengthened gradually by middle mind-set periphery, up to reaching peak value, form annular potential barrier, laser beam intensity is rendered as three-dimensional potential well on radial distribution.In beam rider guidance, adopt this laser, can be when guided missile generation heading depart from, guided missile will obtain a stronger control of azimuth signal correction, and the accuracy and the reliability of guidance system significantly improve.
Description of drawings
Fig. 1 is a light distribution Gaussian curve schematic diagram on the laser beam cross-section of known technology laser output.Fig. 2 is a laser structure schematic diagram of the present invention.Fig. 3 is pump light light distribution schematic diagram after shaping.Fig. 4 is laser resonant cavity laser output coupling mirror structure of the present invention and light path schematic diagram, and this figure is simultaneously as Figure of abstract.Fig. 5 is that the laser beam intensity of laser output of the present invention is the three-dimensional potential well distribution schematic diagram.
Embodiment
See Fig. 2, shown in Figure 4, three-dimensional potential well laser is made up of semiconductor laser pumping 1, shaping lens 2, laser total reflection mirror 3, active medium 4, positive axis axicon lens 5 and negative axial cone mirror 6.Wherein semiconductor laser pumping 1 is selected the surface array semiconductor laser of wavelength 808nm, pulse frequency 1000～2000Hz, average power 5～10W for use.Shaping lens 6 is selected the gradient-index lens of clear aperature 15～20mm, focal length 25～30mm for use between semiconductor laser pumping 1 and laser total reflection mirror 3, its effect is that shaping is carried out in the pump light light distribution, makes it to present the Gaussian Profile that is as the criterion.Laser total reflection mirror 3 is Ping-Ping mirrors of aperture 20mm, and vacuum is plated double-colored deielectric-coating, to 808nm pump light full impregnated, 1.06 μ m laser is all-trans.Active medium 4 is selected the Nd:YAG crystal bar for use, Φ 10mm, and long 6～8mm perhaps selects Nd:YVO for use
4Crystal bar, Φ 10mm, long 5～6mm.Positive axis axicon lens 5 and negative axial cone mirror are 6 coaxial, tapering is identical, and relative at the bottom of the awl of the vertex of a cone of positive axis axicon lens 5 and negative axial cone mirror 6, the two constitutes laser output coupling mirror.Constitute laser resonant cavity by laser total reflection mirror 3 and laser output coupling mirror.Positive axis axicon lens 5 plane minute surface A vacuum are plated 1.06 μ m coupling output film, transmitance 60%.Positive axis axicon lens 5 conical surface minute surface B vacuum are plated 1.06 μ m anti-reflection films.Taper angle theta 120～150 degree.Conical surface minute surface C, the plane minute surface D vacuum of negative axial cone mirror 6 are plated 1.06 μ m anti-reflection films, and cone angle is identical with positive axis axicon lens 5 taper angle theta.Positive axis axicon lens 5, negative axial cone mirror 6 clear aperatures 25～30mm.Between the vertex of a cone of positive axis axicon lens 5, negative axial cone mirror 6 at a distance of the focal length of positive axis axicon lens 5.
Claims (6)
1, a kind of three-dimensional potential well laser, it is characterized in that, in constituting, it sets gradually semiconductor laser pumping (1) along the laser outbound course, shaping lens (2), laser total reflection mirror (3), active medium (4), positive axis axicon lens (5) and negative axial cone mirror (6), shaping lens (2) is in semiconductor laser pumping (1), between the laser total reflection mirror (3), pump light is carried out shaping, positive axis axicon lens (5) and negative axial cone mirror (6) are coaxial, tapering is identical, relative and at the bottom of the awl of the vertex of a cone of positive axis axicon lens (5) and negative axial cone mirror (6) at a distance of the focal length of positive axis axicon lens (5), the two constitutes the laser output coupling mirror, constitutes laser resonant cavity by laser total reflection mirror (3) and laser output coupling mirror.
2, laser according to claim 1 is characterized in that, shaping lens (2) is selected the gradient-index lens of clear aperature 15～20mm, focal length 25～30mm for use.
3, laser according to claim 1 is characterized in that, positive axis axicon lens (5) plane minute surface (A) plating coupling output film, positive axis axicon lens (5) conical surface minute surface (B) plating anti-reflection film.
4, laser according to claim 1 is characterized in that, positive axis axicon lens (5) cone angle (θ) is 120～150 degree, and negative axial cone mirror (6) cone angle is identical with positive axis axicon lens (5) cone angle (θ).
5, laser according to claim 1 is characterized in that, the conical surface minute surface (C) of negative axial cone mirror (6), plane minute surface (D) plating anti-reflection film.
6, laser according to claim 1 is characterized in that, positive axis axicon lens (5), negative axial cone mirror (6) clear aperature 25～30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100049272A CN100454691C (en) | 2007-02-12 | 2007-02-12 | Three-dimensional potential well laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100049272A CN100454691C (en) | 2007-02-12 | 2007-02-12 | Three-dimensional potential well laser |
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| Publication Number | Publication Date |
|---|---|
| CN101013793A CN101013793A (en) | 2007-08-08 |
| CN100454691C true CN100454691C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100049272A Expired - Fee Related CN100454691C (en) | 2007-02-12 | 2007-02-12 | Three-dimensional potential well laser |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292743B (en) * | 2013-05-24 | 2016-03-09 | 中国科学院上海光学精密机械研究所 | The detection method of axial cone mirror cone angle |
| CN103300816A (en) * | 2013-05-30 | 2013-09-18 | 中国科学院长春光学精密机械与物理研究所 | Annular lighting device for eye ground camera |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4275288A (en) * | 1978-05-19 | 1981-06-23 | International Business Machines Corporation | Apparatus for machining material |
| US6864959B2 (en) * | 1991-09-11 | 2005-03-08 | Nikon Corporation | Projection exposure apparatus |
| CN1200269C (en) * | 2003-02-28 | 2005-05-04 | 中国科学院上海光学精密机械研究所 | Multiprobe optical fibre evanescent wave biological sensor |
-
2007
- 2007-02-12 CN CNB2007100049272A patent/CN100454691C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4275288A (en) * | 1978-05-19 | 1981-06-23 | International Business Machines Corporation | Apparatus for machining material |
| US6864959B2 (en) * | 1991-09-11 | 2005-03-08 | Nikon Corporation | Projection exposure apparatus |
| CN1200269C (en) * | 2003-02-28 | 2005-05-04 | 中国科学院上海光学精密机械研究所 | Multiprobe optical fibre evanescent wave biological sensor |
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| CN101013793A (en) | 2007-08-08 |
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Granted publication date: 20090121 Termination date: 20120212 |