CN103592784A - Light intensity continuous adjustment device - Google Patents
Light intensity continuous adjustment device Download PDFInfo
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- CN103592784A CN103592784A CN201310613259.9A CN201310613259A CN103592784A CN 103592784 A CN103592784 A CN 103592784A CN 201310613259 A CN201310613259 A CN 201310613259A CN 103592784 A CN103592784 A CN 103592784A
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- light
- electrooptic modulator
- linear polarizer
- lateral shift
- polarization splitting
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention provides a light intensity continuous adjustment device which comprises a lateral displacement polarization splitting prism A (1), an electro-optical modulator A (2), an electro-optical modulator B (3), a linear polarizing film A (4), a linear polarizing film B (5) and a lateral displacement polarization splitting prism B (6). According to the light intensity continuous adjustment device, the adjustment of any polarization state light intensity within the range of a working waveband is realized by means of changing the magnitude of an impressed voltage, and therefore the light intensity continuous adjustment device has the advantages of being good in linear form, wide in adjustment range, unselective to polarization states of light, easy to control and the like.
Description
Technical field
The present invention relates to a kind of light intensity continuous regulating mechanism, belong to photoelectron technology field.
Background technology
In the fields such as optical communication, laser measurement, laser ranging, laser display and optical data processing, often laser beam need to be adjusted to a suitable strength scope, the regulator of fixed multiplying power is difficult to meet the requirement of follow-on test and use, so light intensity regulating technology has caused researchist's extensive concern continuously.More ripe continuous regulation technology mainly contains tunable diffraction gratings technology, MEMS technology, liquid crystal technology, magneto-optic technology, Planar Lightwave Circuit Technology and two wedge adjusting methods etc. at present.The continuous regulation technology of tunable diffraction gratings, the continuous regulation technology of MEMS, the continuous regulation technology of liquid crystal, the continuous regulation technology of magneto-optic and the continuous regulation technology cost of planar optical waveguide are higher, the optical field distribution of malleable laser beam, and selective to wavelength and polarization state, cannot meet the requirement of laser testing; Two wedge methods can overcome the problems referred to above, but mechanical stability is poor.
Summary of the invention
In order to overcome the problems referred to above, the object of this invention is to provide a kind of light intensity continuous regulating mechanism, this device is adjusted operating voltage and can the light of arbitrary polarization state within the scope of service band be realized and being regulated, there is adjusting linear good, adjusting multiplying power is large, to polarisation of light state non-selectivity and be easy to the features such as control.As shown in Figure 1, a kind of light intensity continuous regulating mechanism provided by the invention, comprises lateral shift polarization splitting prism A1, electrooptic modulator A2, electrooptic modulator B3, linear polarizer A4, linear polarizer B5 and lateral shift polarization splitting prism B6; Incident light is divided into the orthogonal p light in polarization direction and s light after lateral shift polarization splitting prism A1, and p light is successively by electrooptic modulator A2, linear polarizer A4 and lateral shift polarization splitting prism B6, finally from lateral shift polarization splitting prism B6 outgoing; S light is successively by electrooptic modulator B3, linear polarizer B5, finally from the B6 outgoing of lateral shift polarization splitting prism and with p light same light path; Electrooptic modulator A2 and electrooptic modulator B3 are when without impressed voltage, p light is just identical with the optical direction of linear polarizer A4 and linear polarizer B5 respectively with s polarisation of light direction, now p light and s light intensity all can be unaltered from lateral shift polarization splitting prism B6 outgoing, and light intensity does not have adjusted; If p light and s light are respectively through being loaded with electrooptic modulator A2 and the electrooptic modulator B3 of voltage, p light and s polarisation of light direction will change respectively certain angle [alpha], β, there is angle [alpha], β with the optical direction of linear polarizer A4 and linear polarizer B5 respectively, now from the light intensity of lateral shift polarization splitting prism B6 outgoing, can be regulated accordingly, by changing impressed voltage value, can make light intensity obtain the adjusting of different multiplying; Described lateral shift polarization splitting prism A1 is formed by right-angle prism and rhombic prism gummed, cemented surface plating polarization beam splitter, and for generation of the parallel polarized light p light of two bundles and s light, the lateral shift amount of two-beam is determined by the length of rhombic prism; Described electrooptic modulator A2 and electrooptic modulator B3 are preferably by DKDP crystal, LiNbO
3the electrooptic modulator that crystal, RTP crystal or bbo crystal are made, the external voltage being loaded on electrooptic modulator A2 and electrooptic modulator B3 by change is realized the rotation of linearly polarized light polarization direction; Described linear polarizer A4 and linear polarizer B5 be the flat board for being made by dichroism material and two sheet glass sheets gummed all, for stopping polarization direction and the orthogonal light of linear polarizer A4 optical direction; Described lateral shift polarization splitting prism B6 is for being formed by right-angle prism and rhombic prism gummed, and cemented surface plating polarization beam splitter, for by parallel polarized light p light and a branch of Axial Bundle of sharing the same light of s light compositing of two bundles.Beneficial effect: a kind of light intensity continuous regulating mechanism provided by the invention, the operating voltage that is loaded into this device by adjustment can realize and regulating the light intensity of random polarization state within the scope of service band, there is adjusting linear good, adjusting multiplying power is large, to polarisation of light state non-selectivity and be easy to the features such as control.
Accompanying drawing explanation
Fig. 1 is a kind of light path schematic diagram of light intensity continuous regulating mechanism.In figure: 1-lateral shift polarization splitting prism A, 2-electrooptic modulator A, 3-electrooptic modulator B, 4-linear polarizer A, 5-linear polarizer B, 6-lateral shift polarization splitting prism B.
Claims (1)
1. a light intensity continuous regulating mechanism, is characterized in that: this device comprises lateral shift polarization splitting prism A(1), electrooptic modulator A(2), electrooptic modulator B(3), linear polarizer A(4), linear polarizer B(5) and lateral shift polarization splitting prism B(6); Incident light is through lateral shift polarization splitting prism A(1) after be divided into the orthogonal p light in polarization direction and s light, p light is successively by electrooptic modulator A(2), linear polarizer A(4) and lateral shift polarization splitting prism B(6), finally from lateral shift polarization splitting prism B(6) outgoing; S light is successively by electrooptic modulator B(3), linear polarizer B(5), finally from lateral shift polarization splitting prism B(6) outgoing and with p light same light path; Electrooptic modulator A(2) and electrooptic modulator B(3) when without impressed voltage, p light and s polarisation of light direction just respectively with linear polarizer A(4) and linear polarizer B(5) optical direction identical, now p light and s light intensity all can be unaltered from lateral shift polarization splitting prism B(6) outgoing, light intensity does not have adjusted; If p light and s light are respectively through being loaded with the electrooptic modulator A(2 of voltage) and electrooptic modulator B(3), p light and s polarisation of light direction will change respectively certain angle [alpha], β, respectively with linear polarizer A(4) and linear polarizer B(5) optical direction there is angle [alpha], β, now from lateral shift polarization splitting prism B(6) light intensity of outgoing can be regulated accordingly, by changing impressed voltage value, can make light intensity obtain the adjusting of different multiplying;
Described lateral shift polarization splitting prism A(1) by right-angle prism and rhombic prism gummed, formed cemented surface plating polarization beam splitter;
Described electrooptic modulator A(2) and electrooptic modulator B(3) preferably by DKDP crystal, LiNbO
3the electrooptic modulator that crystal, RTP crystal or bbo crystal are made;
Described linear polarizer A(4) and linear polarizer B(5) equal flat boards for being made by dichroism material and two sheet glass sheets gummed;
Described lateral shift polarization splitting prism B(6) for being formed by right-angle prism and rhombic prism gummed, cemented surface plating polarization beam splitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613259.9A CN103592784A (en) | 2013-11-28 | 2013-11-28 | Light intensity continuous adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613259.9A CN103592784A (en) | 2013-11-28 | 2013-11-28 | Light intensity continuous adjustment device |
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| CN103592784A true CN103592784A (en) | 2014-02-19 |
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| CN201310613259.9A Pending CN103592784A (en) | 2013-11-28 | 2013-11-28 | Light intensity continuous adjustment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880832A (en) * | 2014-02-28 | 2015-09-02 | 上海微电子装备有限公司 | Spectrum reconstruction system for focusing measurement |
| CN105157837A (en) * | 2015-05-28 | 2015-12-16 | 中北大学 | Hyperspectral full polarization imager based on acousto-optic filtering and electro-optical phase modulation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3684350A (en) * | 1970-08-17 | 1972-08-15 | Westinghouse Electric Corp | Light beam polarization modulator |
| US3719414A (en) * | 1970-08-28 | 1973-03-06 | Westinghouse Electric Corp | Polarization independent light modulation means using birefringent crystals |
| JPS5484758A (en) * | 1977-12-19 | 1979-07-05 | Nippon Telegr & Teleph Corp <Ntt> | Multimode optical power modulator |
| CN101339142A (en) * | 2008-08-28 | 2009-01-07 | 南京大学 | Method for checking semiconductor substrate crystal quality by linear polarized light |
| CN101520557A (en) * | 2009-03-11 | 2009-09-02 | 福州高意光学有限公司 | Polarization controller |
-
2013
- 2013-11-28 CN CN201310613259.9A patent/CN103592784A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3684350A (en) * | 1970-08-17 | 1972-08-15 | Westinghouse Electric Corp | Light beam polarization modulator |
| US3719414A (en) * | 1970-08-28 | 1973-03-06 | Westinghouse Electric Corp | Polarization independent light modulation means using birefringent crystals |
| JPS5484758A (en) * | 1977-12-19 | 1979-07-05 | Nippon Telegr & Teleph Corp <Ntt> | Multimode optical power modulator |
| CN101339142A (en) * | 2008-08-28 | 2009-01-07 | 南京大学 | Method for checking semiconductor substrate crystal quality by linear polarized light |
| CN101520557A (en) * | 2009-03-11 | 2009-09-02 | 福州高意光学有限公司 | Polarization controller |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880832A (en) * | 2014-02-28 | 2015-09-02 | 上海微电子装备有限公司 | Spectrum reconstruction system for focusing measurement |
| CN104880832B (en) * | 2014-02-28 | 2018-08-24 | 上海微电子装备（集团）股份有限公司 | A kind of Spectral Reconstruction system for measurement of focusing |
| CN105157837A (en) * | 2015-05-28 | 2015-12-16 | 中北大学 | Hyperspectral full polarization imager based on acousto-optic filtering and electro-optical phase modulation |
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Application publication date: 20140219 |