CN107402454B - Device for realizing radial variation nonlinear ellipsometry rotation based on ellipsometry vector light field - Google Patents
Device for realizing radial variation nonlinear ellipsometry rotation based on ellipsometry vector light field Download PDFInfo
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- CN107402454B CN107402454B CN201710770150.4A CN201710770150A CN107402454B CN 107402454 B CN107402454 B CN 107402454B CN 201710770150 A CN201710770150 A CN 201710770150A CN 107402454 B CN107402454 B CN 107402454B
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- 239000013598 vector Substances 0.000 title claims abstract description 63
- 238000000572 ellipsometry Methods 0.000 title claims abstract description 26
- 230000010287 polarization Effects 0.000 claims abstract description 60
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 230000001427 coherent effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000005374 Kerr effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
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Abstract
The invention discloses a device for realizing radial variation nonlinear ellipsometry rotation based on an elliptical polarization vector light field, which comprises the elliptical polarization vector light field, a first convex lens, an isotropic nonlinear optical Kerr medium, a second convex lens and a laser beam analyzer which are sequentially arranged; the elliptical polarization vector light field is focused on an isotropic nonlinear optical Kerr medium through a first convex lens, and the vector light field modulated by the nonlinear Kerr medium enters a laser beam analyzer under the convergence of a second convex lens. The device for realizing radial variation nonlinear ellipsometry rotation based on the elliptical polarization vector light field adopts a simple self-diffraction device to realize nonlinear ellipsometry rotation, and has the advantages of simple light path, convenience in operation and high flexibility; non-linear ellipsometric rotation varying along the radial direction can be realized; the far-field light intensity can be encoded and decoded through the change of the ellipsometry and orientation of the local polarization ellipse on the cross section of the vector light field.
Description
Technical Field
The invention relates to the field of regulation and control of the polarization state of a light field, in particular to a device for realizing radial variation nonlinear ellipsometry based on an ellipsometric vector light field.
Background
For an isotropic nonlinear optical kerr medium, there are two independent components of the third-order nonlinear coefficient tensor, respectively
And
when a beam of elliptically polarized light is incident on isotropic nonlinear optical Kerr medium
When the imaginary part of (a) is 0 and the real part is not 0, the orientation angle of elliptically polarized light is rotated while the elliptical polarization angle is not changed, which is called nonlinear elliptical polarization rotation. This non-linear ellipsometric rotation was first observed in liquid in p.d. maker in 1964, and it was found that the angle of rotation varied with the Intensity of incident light [ r.w. terhoune, c.m. savage, and p.d. maker, "Intensity-dependent changes in the responsive index of liquids,”Phys.Rev.Lett.12(18),507-509(1964)]. The nonlinear ellipsometric rotation has wide application in the fields of nonlinear optical characterization, generation of cross phase wave, optical amplitude limiting, pulse cleaning and the like.
In recent years, the cylindrical symmetric light field with spatially varying polarization state distribution has attracted a great deal of attention, and researchers have proposed a number of novel cylindrical symmetric light fields, such as hybrid polarized light fields generated by "generating device for arbitrarily polarized distributed vector light beam" (patent No. CN101178484A), Full poincare light beams are reported [ a.m. beckley, t.g. brown, and m.a. alonso, "Full poincare beam," at.express 18(10), 10777-shaped 10785(2010) ], elliptical polarized light fields generated experimentally [ b.gu, d.xu, g.rui, m. L ian, y.cui, and q.zhan, "elliptical polarization of linear polarization vectors using high polarization vector, and elliptical polarization vector generated by the conventional linear polarization light field, such that each of the linear polarization light fields is generated by a linear polarization vector, and the linear polarization vector of the linear polarization vector, and the linear polarization vector generated by the linear polarization vector of the linear polarization light field, which is shown by the conventional linear polarization vector optical field generating device, the linear polarization vector generated by the linear polarization vector, the linear polarization vector generating device, the linear polarization vector generating device, the linear polarization device, and the linear polarization device, the linear polarization.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the defect that the nonlinear ellipsometry rotation is insufficient in regulation and control of the polarization state in the prior art, the invention aims to provide a device for realizing radial variation nonlinear ellipsometry rotation based on an ellipsometric vector light field.
The technical scheme is as follows: in order to solve the technical problems, the invention adopts the following technical scheme:
a device for realizing radial variation nonlinear ellipsometry rotation based on an elliptical polarization vector light field comprises the elliptical polarization vector light field, a first convex lens, an isotropic nonlinear optical Kerr medium, a second convex lens and a laser beam analyzer which are sequentially arranged; the elliptical polarization vector light field is focused on an isotropic nonlinear optical Kerr medium through a first convex lens, and the vector light field modulated by the nonlinear Kerr medium enters a laser beam analyzer under the convergence of a second convex lens.
The working principle is as follows: the invention discloses a device for realizing radial variation nonlinear ellipsometry rotation based on an elliptically polarized vector light field, wherein the incident elliptically polarized vector light field is focused on an isotropic nonlinear optical Kerr medium through a first convex lens, and the vector light field modulated by the nonlinear Kerr medium enters a laser beam analyzer under the convergence of a second convex lens; the distribution of the polarization state of the emergent field is flexibly controlled by changing the ellipsometry of the incident elliptical polarization vector light field and the size of the isotropic nonlinear optical Kerr effect.
The isotropic nonlinear optical Kerr medium needs to be placed at a focal plane of the first convex lens; by reasonably moving the second convex lens, the light beam is ensured to completely enter the laser beam analyzer.
An 1/4 wave plate and a polaroid are sequentially arranged between the second convex lens and the laser beam analyzer; the polarization state distribution of the vector light field converged on the laser beam analyzer is detected.
The elliptical polarization vector light field is formed by coherent superposition of left-handed and right-handed circularly polarized light with different carried amplitudes and phases; by adjusting the amplitude and phase of the left-handed and right-handed circularly polarized light, the ellipsometry and orientation angle of an incident elliptical polarization vector light field can be flexibly controlled.
Has the advantages that: the device for realizing radial variation nonlinear ellipsometry rotation based on the elliptical polarization vector light field adopts a simple self-diffraction device to realize nonlinear ellipsometry rotation, and has the advantages of simple light path, convenience in operation and high flexibility; non-linear ellipsometric rotation varying along the radial direction can be realized; the far-field light intensity can be encoded and decoded through the change of the ellipsometry and orientation of the local polarization ellipse on the cross section of the vector light field.
Drawings
FIG. 1 is a schematic structural diagram of a non-linear ellipsometric rotation apparatus for realizing radial variation based on an ellipsometric vector light field according to the present invention;
FIG. 2 is a light intensity distribution diagram of an elliptical polarization vector light field before incidence of an isotropic nonlinear optical Kerr medium;
FIG. 3 is a diagram of the polarization state distribution of an elliptical polarization vector light field before incidence of an isotropic nonlinear optical Kerr medium;
FIG. 4 is a light intensity distribution diagram of a far field after an elliptically polarized vector light field passes through an isotropic nonlinear optical Kerr medium;
FIG. 5 is a diagram showing a polarization state distribution of a far field after an elliptical polarization vector light field passes through an isotropic nonlinear optical Kerr medium;
in the figure, 1 is an elliptically polarized vector light field, 2 is a first convex lens, 3 is an isotropic nonlinear optical kerr medium, 4 is a second convex lens, 5 is an 1/4 wave plate, 6 is a polarizing plate, and 7 is a laser beam analyzer.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
As shown in fig. 1-5, a device for realizing radial variation nonlinear ellipsometry rotation based on an elliptically polarized vector light field comprises an elliptically polarized vector light field, a first convex lens, an isotropic nonlinear optical kerr medium, a second convex lens and a laser beam analyzer, which are sequentially arranged; the elliptical polarization vector light field is focused on an isotropic nonlinear optical Kerr medium through a first convex lens, and the vector light field modulated by the nonlinear Kerr medium enters a laser beam analyzer under the convergence of a second convex lens; the isotropic nonlinear optical Kerr medium needs to be placed at the focal plane of the first convex lens; an 1/4 wave plate and a polaroid are sequentially arranged between the second convex lens and the laser beam analyzer; the elliptical polarization vector light field is formed by coherent superposition of left-handed and right-handed circularly polarized light with different carrying amplitudes and phases.
As shown in fig. 4, an incident elliptical polarization vector light field is focused on an isotropic nonlinear optical kerr medium through a first convex lens, and an emergent light field modulated by the nonlinear kerr medium enters a laser beam analyzer under the convergence of a second convex lens; as can be seen from fig. 5, after isotropic nonlinear optical kerr medium modulation, the polarization state of the optical field exhibits a circularly symmetric multi-ring structure, the ellipsometry of each local ellipse is no longer the same, but gradually decreases along the radial direction, and the orientation of the local ellipse rotates, which is expressed as a radially varying nonlinear ellipsometric rotation as a whole.
The invention discloses a device for realizing radial variation nonlinear ellipsometry rotation based on an elliptically polarized vector light field, wherein the incident elliptically polarized vector light field is focused on an isotropic nonlinear optical Kerr medium through a first convex lens, and the vector light field modulated by the nonlinear Kerr medium enters a laser beam analyzer under the convergence of a second convex lens; the isotropic nonlinear optical Kerr medium needs to be placed at the focal plane of the first convex lens; the second convex lens is reasonably moved to ensure that the light beam completely enters the laser beam analyzer; an 1/4 wave plate and a polaroid are sequentially arranged between the second convex lens and the laser beam analyzer and are used for detecting the polarization state distribution of the vector light field converged on the laser beam analyzer; the distribution of the polarization state of the emergent field is flexibly controlled by changing the ellipsometry of the incident elliptical polarization vector light field and the size of the isotropic nonlinear optical Kerr effect.
The device for realizing radial variation nonlinear ellipsometry rotation based on the elliptical polarization vector light field adopts a simple self-diffraction device to realize nonlinear ellipsometry rotation, and has the advantages of simple light path, convenience in operation and high flexibility; non-linear ellipsometric rotation varying along the radial direction can be realized; the far-field light intensity can be encoded and decoded through the change of the ellipsometry and orientation of the local polarization ellipse on the cross section of the vector light field.
Claims (1)
1. A device for realizing radial variation nonlinear elliptic polarization rotation based on an elliptic polarization vector light field is characterized in that: the device comprises an elliptical polarization vector light field (1), a first convex lens (2), an isotropic nonlinear optical Kerr medium (3), a second convex lens (4) and a laser beam analyzer (7) which are sequentially arranged; an elliptically polarized vector light field (1) is focused on an isotropic nonlinear optical Kerr medium (3) through a first convex lens (2), and the vector light field modulated by the nonlinear Kerr medium enters a laser beam analyzer (7) under the convergence of a second convex lens (4); the isotropic nonlinear optical Kerr medium (3) needs to be placed at a focal plane of the first convex lens (2); an 1/4 wave plate (5) and a polaroid (6) are sequentially arranged between the second convex lens (4) and the laser beam analyzer (7); the elliptical polarization vector light field is formed by coherent superposition of left-handed and right-handed circularly polarized light with different amplitudes and phases, and the ellipticity and the orientation angle of the incident elliptical polarization vector light field are controlled by adjusting the amplitudes and the phases of the left-handed and right-handed circularly polarized light; the far field light intensity is encoded and decoded by the variation of the ellipsometry and orientation of the local polarization ellipse on the vector light field cross section.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005221913A (en) * | 2004-02-09 | 2005-08-18 | Chiba Univ | Optical incident apparatus for polarization maintaining optical fiber |
| CN103424881A (en) * | 2013-07-26 | 2013-12-04 | 华中科技大学 | Fresnel prism phase retarder for double-rotation compensator ellipsometer |
| CN106569341A (en) * | 2016-10-28 | 2017-04-19 | 东南大学 | Device and method compositing and keeping focal field arbitrary polarization state |
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| US6853491B1 (en) * | 2003-11-26 | 2005-02-08 | Frank Ruhle | Collimating optical member for real world simulation |
| CN103149708A (en) * | 2013-03-26 | 2013-06-12 | 四川大学 | Any field polarization state control system |
| CN103944054B (en) * | 2014-04-11 | 2016-08-17 | 西安交通大学 | A kind of ultrashort pulse optical limiter based on optical kerr effect |
| CN104090386A (en) * | 2014-07-30 | 2014-10-08 | 东南大学 | Method for regulating light field polarization state distribution |
| CN106094235A (en) * | 2016-08-10 | 2016-11-09 | 东南大学 | A kind of device utilizing uniaxial crystal to realize the rotation of light field polarization state |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005221913A (en) * | 2004-02-09 | 2005-08-18 | Chiba Univ | Optical incident apparatus for polarization maintaining optical fiber |
| CN103424881A (en) * | 2013-07-26 | 2013-12-04 | 华中科技大学 | Fresnel prism phase retarder for double-rotation compensator ellipsometer |
| CN106569341A (en) * | 2016-10-28 | 2017-04-19 | 东南大学 | Device and method compositing and keeping focal field arbitrary polarization state |
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