CN1484065A - High-efficiency polarizing device - Google Patents
High-efficiency polarizing device Download PDFInfo
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- CN1484065A CN1484065A CNA031418988A CN03141898A CN1484065A CN 1484065 A CN1484065 A CN 1484065A CN A031418988 A CNA031418988 A CN A031418988A CN 03141898 A CN03141898 A CN 03141898A CN 1484065 A CN1484065 A CN 1484065A
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- 230000010287 polarization Effects 0.000 claims abstract description 39
- 239000013078 crystal Substances 0.000 claims abstract description 25
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 229910021532 Calcite Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- QWVYNEUUYROOSZ-UHFFFAOYSA-N trioxido(oxo)vanadium;yttrium(3+) Chemical compound [Y+3].[O-][V]([O-])([O-])=O QWVYNEUUYROOSZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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Abstract
An efficient polarizing device comprises a birefringent crystal, a half-wave plate (or 90 DEG optical rotator), a triangular prism and a K-shaped prism. The birefringent crystal divides the non-polarized incident beam into parallel beams which have a certain distance and mutually perpendicular polarization directions, one of the parallel beams passes through a half-wave plate (or a 90-degree optical rotator) to obtain two lines of polarized beams with the same polarization direction and transmission direction, and the distance between the prism and the prism of the K-shaped mirror is adjusted to realize the synthesis of the two polarized beams, thereby achieving the purpose of utilizing light energy to the maximum extent and realizing high polarization conversion efficiency. The invention has the characteristics of compact structure, convenient adjustment and high polarizing efficiency, has no influence on the divergence angle and the propagation direction of light beams, and is particularly suitable for the high-efficiency polarizing of non-polarized laser.
Description
Technical field:
The present invention relates to laser and optical device, particularly a kind of efficient deflection device that rises to nonpolarized light.
Background technology:
In optical measurement and laser technology field, the polarization characteristic to light beam has higher requirement usually, and this just need rise light beam partially.Because the conventional polarizer can only rise partially a polarized component of light beam, and has wasted the energy of another polarized component, so to the polarization conversion efficiency of nonpolarized light lower (not as good as 50%).In order to realize that the efficient of nonpolarized light risen partially, normally adopt the structure of parallel beam splitter polariscope and half-wave plate combination, referring to technology formerly [Chinese laser., 22 (1), 1995, P37], in this structure, because there are certain lateral separation in two parallel polarized light interfasciculars, bring greatly constantly to use, restricted the usable range of this prism; Adopt the structure of polarization spectroscope and reflective mirror and half-wave plate combination also can realize this function, referring to technology [utility model patent formerly, application number: 93241786], but in this structure, owing to have certain included angle between two light beams, the direction of propagation is also not quite identical, can not realize closing bundle simultaneously near field and far field, has limited its range of application greatly.
Summary of the invention:
The technical problem to be solved in the present invention is to overcome the deficiency in the above-mentioned technology formerly, solve lateral separation and the inconsistent problem of direction that two parallel polarized light interfasciculars exist, a kind of efficient deflection device is provided, this device can be realized rising of light beam partially also synthetic under the prerequisite that does not influence the elementary beam angle of divergence and the direction of propagation.The present invention should have compact conformation, easy to adjust, the characteristics that polarization conversion efficiency is high.
Technical conceive of the present invention is:
Adopt birefringece crystal that incident beam is divided into mutually perpendicular two parallel beams in polarization direction,-90 ° of polarization plane rotators are used for the polarization direction half-twist with one of them light beam, make two light beams all identical on polarization, the direction of propagation, realize the bundle that closes of two light beams then by the spacing of adjusting prism and K shape mirror rib.So just two polarized components with former incident beam all are converted into identical polarization direction, realized high polarization conversion efficiency, thereby maximally utilise luminous energy, and this device to the angle of divergence of light beam and the direction of propagation without any influence, very easy to use.
Technical solution of the present invention is as follows:
A kind of efficient deflection device, it is characterized in that it comprises birefringece crystal, 90 ° of polarization plane rotators, prism and K shape mirror rib, said birefringece crystal is divided into the non-polarized incident light bundle and has certain distance each other, mutually perpendicular two parallel beams in polarization direction, make one of them pass through 90 ° of polarization plane rotators, obtain the polarization direction two bunch light beams identical with the direction of propagation, prism and K shape mirror rib) all vertical with light beam, the summit A of prism is on OO ' on the central axis of two light beams, two light beams deflection OO ' by prism, the summit B of K shape mirror rib is also on OO ', by adjusting the spacing of prism and K shape mirror rib, realize the synthetic of two light beams.
Said birefringece crystal is the logical angled birefringent plate that plays the parallel beam splitter effect of light face of optical axis and crystal, and its material is calcite crystal or yttrium vanadate crystal.
Said 90 ° of polarization plane rotators are fast axle and the polarization apparatus that is 90 ° by the polarization direction of this wave plate light beam half-wave plate at 45 or rotation angle.
Said prism is the isosceles prism of vertical placement with light beam.
Place vertical of said K shape mirror rib with light beam, and its summit B is on axes O O ', and the inclined surface of its inclined-plane and prism is parallel.
The present invention compares with technology formerly, has compact conformation, easy to adjust and characteristics that polarization conversion efficiency is high, and under the prerequisite that does not influence the elementary beam angle of divergence and the direction of propagation, has realized synthetic to light beam helping making full use of of luminous energy.
Description of drawings:
Fig. 1 is the structural representation of a kind of new and effective deflection device of the present invention
Embodiment
The structure of efficient deflection device of the present invention comprises 1,90 ° of polarization plane rotators 2 of birefringece crystal, prism 3 and K shape mirror rib 4 as shown in Figure 1.Said birefringece crystal 1 is divided into incident beam and has certain distance each other, mutually perpendicular two parallel beams in polarization direction, make one of them pass through 90 ° of polarization plane rotators 2, thereby obtain polarization direction two linearly polarized light beams identical with the direction of propagation, prism 3 and K shape mirror rib 4 all vertical placements with light beam, the summit A of prism 3 is on OO ' on the central axis of two light beams, two light beams deflection OO ' by prism 3, the summit B of K shape mirror rib 4 is also on OO ', become parallel after its role is to make two-beam by refraction, by adjusting the spacing of prism 3 and K shape mirror rib 4, to realize the synthetic of two light beams, reach and maximally utilise luminous energy, realize high polarization conversion efficiency, and this device to the angle of divergence of light beam and the direction of propagation without any influence.
Said birefringece crystal 1 is the logical angled birefringent plate that plays the parallel beam splitter effect of light face of optical axis and crystal, and its material is calcite crystal or yttrium vanadate crystal.
Said 90 ° of polarization plane rotators 2 are fast axle and the polarization apparatus that is 90 ° by the polarization direction of this wave plate light beam half-wave plate at 45 or rotation angle.
Said prism 3 is an isosceles prism, vertical placement with light beam, and its summit A its role is to make two light beams to axes O O ' deviation on axes O O '.
Said K shape mirror rib 4 is vertical with light beam, and its summit B is on axes O O ', and its inclined-plane is parallel with the inclined-plane of prism 3, and the effect of K shape mirror rib 4 is to make two deviation light beams parallel with axes O O ' again.
Enumerate the related parameter that has of a specific embodiment below: the rising of non-polarized Raman laser with wavelength 1110nm, beam diameter 1.0mm is example partially, and structure as shown in Figure 1.Light beam is at the position vertical incidence birefringece crystal 1 of distance center axes O O ' 1.6mm, birefringece crystal 1 is 47.7 ° of calcite crystals that thickness D is 30mm for the angle θ of optical axis and crystal interface, the centre distance of two parallel beams is spaced apart 3.2mm after the beam splitting, 90 ° of polarization plane rotators 2 are one 1/2 wave plates (at 1110nm), the material of prism 3 and K shape mirror rib 4 is JGS2, apex angle is 120 °, place at OO ' and vertical centre axis OO ' on 3 and 4 summits, when the distance L of prism 3 and K shape mirror rib 4 when being adjusted into 2.5mm, realize efficiently rising partially and closing bundle.New and effective deflection device of present embodiment is applied to rising partially of double-clad optical fiber laser output laser, all do not plate at each optical element under the situation of anti-reflection film, nonpolarized light is reached linear polarization transformation efficiency up to 73%, if, can reach the linear polarization transformation efficiency more than 89% to each optical surface plating anti-reflection film.
Claims (5)
1. one kind is efficiently played deflection device, it is characterized in that it comprises birefringece crystal (1), 90 ° of polarization plane rotators (2), prism (3) and K shape mirror rib (4), said birefringece crystal (1) is divided into the non-polarized incident light bundle and has certain distance each other, mutually perpendicular two parallel beams in polarization direction, make one of them pass through 90 ° of polarization plane rotators (2), obtain the polarization direction two bunch light beams identical with the direction of propagation, prism (3) is all vertical with light beam with K shape mirror rib (4), the summit A of prism (3) is on OO ' on the central axis of two light beams, two light beams deflection OO ' by prism (3), the summit B of K shape mirror rib (4) is also on OO ', by adjusting the spacing of prism (3) and K shape mirror rib (4), realize the synthetic of two light beams.
2. efficient deflection device according to claim 1 is characterized in that said birefringece crystal (1) is optical axis and the logical angled birefringent plate that plays the parallel beam splitter effect of light face of crystal, and its material is calcite crystal or yttrium vanadate crystal.
3. efficient deflection device according to claim 1 is characterized in that said 90 ° of polarization plane rotators (2) are fast axle and the polarization apparatus that is 90 ° by the polarization direction of this wave plate light beam half-wave plate at 45 or rotation angle.
4. efficient deflection device according to claim 1 is characterized in that said prism (3) is the isosceles prism of vertical placement with light beam.
5. according to claim 1 or 2 or 3 or 4 described efficient deflection devices, it is characterized in that said K shape mirror rib (4) is vertical with light beam to place, and its summit B to be on axes O O ', its inclined-plane is parallel with the inclined surface of prism (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031418988A CN1484065A (en) | 2003-07-29 | 2003-07-29 | High-efficiency polarizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031418988A CN1484065A (en) | 2003-07-29 | 2003-07-29 | High-efficiency polarizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1484065A true CN1484065A (en) | 2004-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031418988A Pending CN1484065A (en) | 2003-07-29 | 2003-07-29 | High-efficiency polarizing device |
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| CN (1) | CN1484065A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022214366A2 (en) | 2021-04-08 | 2022-10-13 | TRUMPF Werkzeugmaschinen SE + Co. KG | Device and method for polarizing a laser beam having an undefined polarization state |
| CN115657075A (en) * | 2022-05-25 | 2023-01-31 | 北京一径科技有限公司 | Beam combining device and manufacturing method thereof |
-
2003
- 2003-07-29 CN CNA031418988A patent/CN1484065A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022214366A2 (en) | 2021-04-08 | 2022-10-13 | TRUMPF Werkzeugmaschinen SE + Co. KG | Device and method for polarizing a laser beam having an undefined polarization state |
| DE102021108759A1 (en) | 2021-04-08 | 2022-10-13 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Device and method for polarizing a laser beam which has an undefined state of polarization |
| WO2022214366A3 (en) * | 2021-04-08 | 2022-12-01 | TRUMPF Werkzeugmaschinen SE + Co. KG | Apparatus and method for polarizing a laser beam having an undefined polarization state |
| CN115657075A (en) * | 2022-05-25 | 2023-01-31 | 北京一径科技有限公司 | Beam combining device and manufacturing method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |