CN108761826A - A kind of compact optical isolator and optically isolated method - Google Patents
A kind of compact optical isolator and optically isolated method Download PDFInfo
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- CN108761826A CN108761826A CN201810978022.3A CN201810978022A CN108761826A CN 108761826 A CN108761826 A CN 108761826A CN 201810978022 A CN201810978022 A CN 201810978022A CN 108761826 A CN108761826 A CN 108761826A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 75
- 230000010287 polarization Effects 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 8
- 230000031700 light absorption Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- BYACHAOCSIPLCM-UHFFFAOYSA-N 2-[2-[bis(2-hydroxyethyl)amino]ethyl-(2-hydroxyethyl)amino]ethanol Chemical group OCCN(CCO)CCN(CCO)CCO BYACHAOCSIPLCM-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- 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
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Abstract
The present invention discloses a kind of compact optical isolator and optically isolated method, including input collimator, the first diaphragm, the first analyzing crystal, optically-active device, wave plate, the second analyzing crystal and the second diaphragm set gradually, the optically-active device includes magnetic tube and the gyrotropi crystal that is set in the magnetic tube, the front end face of the gyrotropi crystal is close to first analyzing crystal, and rear end face is close to the wave plate；The first reflecting surface is arranged in the lower part of the front end face, and the second reflecting surface is arranged in the top of the rear end face, and first reflecting surface is arranged in parallel with second reflecting surface.The present invention effectively reduces optoisolator size, reduces the design difficulty of magnetic tube combination, is conducive to the Integration Design of optical passive component, reduces the cost of manufacture of optoisolator, is conducive to the universal of optoisolator.
Description
Technical field
The present invention relates to the optical passive component technical fields applied to optic communication and laser processing, and in particular to a kind of tight
Gather type optoisolator and optically isolated method.
Background technology
In high powered laser system, the laser of laser back reflection at rapidoprint end face, which enters, in order to prevent swashs
Laser internal component is damaged among light device system, is needed the output end in laser to add optoisolator, is kept light unidirectional
Pass through.However, existing optoisolator uses the design scheme of optical bypass formula at internal magnetic rotation position, crystal ruler is caused
It is very little bigger than normal, to cause the size of magnetic tube to also become larger, so that the Combination Design of magnetic tube is become complicated, integrated to entire device is set
Meter causes the limitation of size, significantly limits use occasion and the range of optoisolator.
Therefore it provides a kind of compact optical isolator and optically isolated method, to solve asking present in the above-mentioned prior art
Topic becomes present technical problem urgently to be resolved hurrily.
Invention content
The object of the present invention is to provide a kind of compact optical isolator and optically isolated methods, are deposited with solving the above-mentioned prior art
The problem of, effectively reduce optoisolator size, reduce the design difficulty of magnetic tube combination, be conducive to the integrated of optical passive component
Change design, reduce the cost of manufacture of optoisolator, is conducive to the universal of optoisolator.
To achieve the above object, the present invention provides following schemes：The present invention provides a kind of compact optical isolator, including
Input collimator, the first diaphragm, the first analyzing crystal, optically-active device, wave plate, the second analyzing crystal and the second light set gradually
Door screen, the optically-active device include magnetic tube and the gyrotropi crystal that is set in the magnetic tube, and the front end face of the gyrotropi crystal is close
First analyzing crystal, rear end face is close to the wave plate；The first reflecting surface, the rear end face is arranged in the lower part of the front end face
Top the second reflecting surface is set, first reflecting surface is arranged in parallel with second reflecting surface.
Preferably, first reflecting surface and second reflecting surface are inclined fully reflecting surface, first reflection
The angle of face and the front end face is α 1, and the angle of second reflecting surface and the rear end face is α 2, and α 1=α 2.
Preferably, the front end face is vertical with by the light path of the first analyzing crystal with the rear end face.
Preferably, it is coated with anti-reflection film on the front end face, rear end face, the first reflecting surface and the second reflecting surface.
Preferably, the first speculum and the second reflection are posted respectively on first reflecting surface and second reflecting surface
Mirror, first speculum and second speculum are total reflective mirror.
Preferably, the front end face and the rear end face are coated with anti-reflection film, first reflecting surface and second reflection
The film that is all-trans is coated on face.
The invention also discloses a kind of optically isolated methods of the above-mentioned compact optical isolator of reference：
Light from input collimator forward entrance light path be：The light for inputting collimator forward entrance enters the first diaphragm, defeated
Enter the stray light that collimator is sent out to be absorbed by the first diaphragm, the first analyzing crystal is entered by the collimated light beam of the first diaphragm, the
Non-polarized light is resolved into polarised light o light and e light by one analyzing crystal, and two beam polarised light o light and e light enter to inject optically-active device, rotation
The polarization state of o light and e light is rotated clockwise 45 ° by electro-optical device, and two beam polarised lights enter wave plate later, and wave plate is again by two polarizations
State light rotates clockwise 45 °, and two polarised lights being emitted at this time are rotated by 90 ° with when being emitted from the first analyzing crystal；Namely first
The o light of analyzing crystal outgoing becomes e light, and e light becomes o light；The light being emitted from wave plate enters the second analyzing crystal, and the second light splitting is brilliant
Body is by two beam polarization state combiners at incident second diaphragm of a branch of non-polarized light, and the second diaphragm is by incident spuious light absorption；
Reversely incident light path is：Reversed incident light enters the second diaphragm, and the second diaphragm is by the stray light of reversed incidence
It absorbs；Reversed incident light enters the second analyzing crystal, and non-polarized light is resolved into polarised light o light and e light by the second analyzing crystal,
The o light and e light of separation enter to inject wave plate, and the polarization state of o light and e light is rotated clockwise 45 ° by wave plate, o light after 45 ° of rotation and
E light enters to inject optically-active device, and light is rotated 45 ° by optically-active device counterclockwise, and the polarization state of two light also ensures as the second light splitting at this time
Polarization state when crystal is emitted, two-beam deviation is in two side positions of original optical path, respectively incidence after being incident on the first analyzing crystal
To the first diaphragm both sides, is blocked by diaphragm, reach isolation effect.
The present invention achieves following technique effect compared with the existing technology：
The present invention effectively reduces optoisolator size, reduces the design difficulty of magnetic tube combination, is conducive to optical passive component
Integration Design, reduce the cost of manufacture of optoisolator, be conducive to the universal of optoisolator.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is compact optical isolator light output schematic diagram of the present invention；
Fig. 2 is the front view of one compact optical isolator of the embodiment of the present invention；
Fig. 3 is the front view of two compact optical isolator of the embodiment of the present invention；
Fig. 4 is compact optical isolator forward direction light path side view of the present invention；
Fig. 5 is the reverse light path side view of compact optical isolator of the present invention；
Wherein, collimator 10, the first diaphragm 20, the first analyzing crystal 30, optically-active device 40, magnetic tube 401, optically-active crystalline substance are inputted
Body 402, the first speculum 403, the second speculum 404, the first reflecting surface 405, the second reflecting surface 406, wave plate 50, second are divided
Crystal 60, the second diaphragm 70.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of compact optical isolator and optically isolated methods, are deposited with solving the above-mentioned prior art
The problem of, effectively reduce optoisolator size, reduce the design difficulty of magnetic tube combination, be conducive to the integrated of optical passive component
Change design, reduce the cost of manufacture of optoisolator, is conducive to the universal of optoisolator.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Embodiment one
As shown in Figs. 1-2, the present embodiment provides a kind of compact optical isolators, including the input collimator set gradually
10, the first diaphragm 20, the first analyzing crystal 30, optically-active device 40, wave plate 50, the second analyzing crystal 60 and the second diaphragm 70；Tool
Body, the first diaphragm 20 is located at the output end of input collimator 10, and the first analyzing crystal 30 is located at the other end of the first diaphragm 20,
The rear of first analyzing crystal 30 is optically-active device 40；Optically-active device 40 includes magnetic tube 401 and the optically-active being set in magnetic tube 401
Crystal 402, the front end face of gyrotropi crystal 402 is close to the first analyzing crystal 30, and rear end face is close to wave plate 50；The lower part of front end face is set
The first reflecting surface 405 is set, the second reflecting surface 406 is arranged in the top of rear end face, and the first reflecting surface 405 and the second reflecting surface 406 are flat
Row setting；The other end of wave plate 50 places the second analyzing crystal 60, and the second diaphragm 70 is placed in the rear end of the second analyzing crystal 60.
Collimator 10 is inputted in the present embodiment, using common collimator；Diaphragm refers in optical system to light
The entity of restriction effect is done up, it can be the edge, frame or the screen with holes being especially arranged of lens, can according to demand certainly
Row selection；First analyzing crystal and the second analyzing crystal are existing apparatus, are made of birefringece crystal, when forward entrance,
Non-polarized light is resolved into two polarised light o light and e light by the first analyzing crystal 30, and the second analyzing crystal 60 is photosynthetic by two beam polarization states
Beam is at incident second diaphragm 70 of a branch of non-polarized light；When reversed incident, non-polarized light is resolved into polarization by the second analyzing crystal 60
Two-beam is deviateed two side positions in original optical path by light o light and e light, the first analyzing crystal 30；Wave plate 50, also known as phase delay
Piece, it is process by birefringent material, it makes to generate phase by the mutually orthogonal polarized component of two of wave plate 50
Offset, can be used to the polarization state for adjusting light beam, generally use quartz crystal is made.Above-mentioned component in the present embodiment is existing
Some devices can be selected according to actual needs.
In the present embodiment, gyrotropi crystal 402 is the crystal with two oblique angle faces, the first reflecting surface 405 and the second reflecting surface
406 be inclined fully reflecting surface, and the angle of the first reflecting surface 405 and front end face is α 1, the second reflecting surface 406 and rear end face
Angle is α 2, and α 1=α 2；Front end face is vertical with by the light path of the first analyzing crystal 30 with rear end face.
It is coated with anti-reflection film on front end face, rear end face, the first reflecting surface 405 and the second reflecting surface 406, anti-reflection film can be used
Calcirm-fluoride is made, and effect is the intensity of reduction reflected light keeps optical system imaging more clear to increase the intensity of transmitted light
It is clear；The first speculum 403 and the second speculum 404 are posted on first reflecting surface 405 and the second reflecting surface 406 respectively, first is anti-
It is total reflective mirror to penetrate mirror 403 and the second speculum 404.
A kind of optically isolated method of the above-mentioned compact optical isolator of reference is also disclosed in the present embodiment：
As shown in figure 4, light enters the first diaphragm 20 from input 10 forward entrance of collimator, input collimator 10 sends out spuious
Light is absorbed by the first diaphragm 20, enters the first analyzing crystal 30, the first analyzing crystal 30 by the collimated light beam of the first diaphragm 20
Non-polarized light is resolved into two polarised light o light and e light, two beam polarised light o light and e light enter to inject gyrotropi crystal 402, due to optically-active
Crystal 402 generates magnetic rotation effect under the action of magnetic tube 401, and the polarization state of o light and e light rotates clockwise 45 °, it is laggard
Enter wave plate 50, two polarization state lights rotate clockwise 45 ° under the effect of wave plate 50, two polarization state lights being emitted at this time with from first point
O light and e light when luminescent crystal is emitted have rotated 90 °, that is, the o light of the first analyzing crystal 30 outgoing becomes e light, and e light becomes o
Light.The light being emitted from wave plate 50 enters the second analyzing crystal 60, and the second analyzing crystal 60 is by two beam polarization state combiners at a branch of
Non-polarized light the second diaphragm 70 of incidence.
As shown in figure 5, reversed incident light enters to inject the second analyzing crystal 60, incident stray light by the second diaphragm 70
It is absorbed by the second diaphragm 70, non-polarized light is resolved into polarised light o light and e light, the o light and e of separation by the second analyzing crystal 60
Light enters to inject wave plate 50, since the effect of wave plate 50 makes the polarization state of o light and e light rotate clockwise 45 °, the o light after 45 ° of rotation
With e light enter to inject gyrotropi crystal 402, light is rotated 45 ° by gyrotropi crystal counterclockwise under the action of magnetic tube 401, at this time two light
Polarization state also ensure for the outgoing of the second analyzing crystal 60 when polarization state, be incident on two-beam after the first analyzing crystal 30 and deviate and exist
Two side positions of original optical path are incident on respectively on 20 both sides of the first diaphragm, can not be entered to inject input collimator 10, be effectively realized
Input the irreversible of collimator light path.
Embodiment two
If Fig. 1-is shown, the present embodiment is theed improvement is that on the basis of embodiment one：For anti-in patch first
Penetrate mirror 403 and be difficult fully achieve two speculums parallel when the second speculum 404, so optically-active device 40 include magnetic tube 401,
What gyrotropi crystal 402, the first reflecting surface 405 and the second reflecting surface 406, the first reflecting surface 405 and the second reflecting surface 406 plated respectively
Be all-trans film, and anti-reflection film is plated at two faces of front end face and rear end face of angle α 1 and α 2 with reflecting surface on gyrotropi crystal.
Specific case is applied in the present invention, and principle and implementation of the present invention are described, above example
Illustrate the method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, according to
According to the thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (7)
1. a kind of compact optical isolator, it is characterised in that：Including set gradually input collimator, the first diaphragm, first point
Luminescent crystal, optically-active device, wave plate, the second analyzing crystal and the second diaphragm, the optically-active device include magnetic tube and are set to described
Gyrotropi crystal in magnetic tube, the front end face of the gyrotropi crystal is close to first analyzing crystal, and rear end face is close to the wave plate；
The first reflecting surface is arranged in the lower part of the front end face, and the second reflecting surface, first reflecting surface is arranged in the top of the rear end face
It is arranged in parallel with second reflecting surface.
2. compact optical isolator according to claim 1, it is characterised in that：First reflecting surface is anti-with described second
The face of penetrating is inclined fully reflecting surface, and the angle of first reflecting surface and the front end face is α 1, second reflecting surface with
The angle of the rear end face is α 2, and α 1=α 2.
3. compact optical isolator according to claim 2, it is characterised in that：The front end face and the rear end face with
Light path by first analyzing crystal is vertical.
4. compact optical isolator according to claim 3, it is characterised in that：The front end face, rear end face, the first reflection
It is coated with anti-reflection film on face and the second reflecting surface.
5. compact optical isolator according to claim 4, it is characterised in that：First reflecting surface and described second is instead
It penetrates and posts the first speculum and the second speculum on face respectively, first speculum is to be all-trans with second speculum
Mirror.
6. compact optical isolator according to claim 3, it is characterised in that：The front end face and the rear end face are coated with
It is coated with the film that is all-trans on anti-reflection film, first reflecting surface and second reflecting surface.
7. a kind of optically isolated method of reference compact optical isolator as claimed in any one of claims 1 to 6, it is characterised in that：
Light from input collimator forward entrance light path be：The light for inputting collimator forward entrance enters the first diaphragm, and input is accurate
The stray light that straight device is sent out is absorbed by the first diaphragm, by the collimated light beam of the first diaphragm into the first analyzing crystal, first point
Non-polarized light is resolved into polarised light o light and e light by luminescent crystal, and two beam polarised light o light and e light enter to inject optically-active device, optically-active dress
It sets and the polarization state of o light and e light is rotated clockwise 45 °, two beam polarised lights enter wave plate later, and wave plate is again by two polarization state lights
45 ° are rotated clockwise, two polarised lights being emitted at this time are rotated by 90 ° with when being emitted from the first analyzing crystal；Namely first light splitting
The o light of crystal outgoing becomes e light, and e light becomes o light；The light being emitted from wave plate enters the second analyzing crystal, and the second analyzing crystal will
Two beam polarization state combiners are at incident second diaphragm of a branch of non-polarized light, and the second diaphragm is by incident spuious light absorption；
Reversely incident light path is：Reversed incident light enters the second diaphragm, and the second diaphragm is by the spuious light absorption of reversed incidence；
Reversed incident light enters the second analyzing crystal, and non-polarized light is resolved into polarised light o light and e light by the second analyzing crystal, detaches
O light and e light enter to inject wave plate, the polarization state of o light and e light is rotated clockwise 45 ° by wave plate, the o light after 45 ° of rotation and e light
Enter to inject optically-active device, light is rotated 45 ° by optically-active device counterclockwise, and the polarization state of two light also ensures to be the second analyzing crystal at this time
Polarization state when outgoing is incident on two-beam after the first analyzing crystal and deviates two side positions in original optical path, is incident on the respectively
One diaphragm both sides, are blocked by diaphragm, reach isolation effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810978022.3A CN108761826A (en) | 2018-08-27 | 2018-08-27 | A kind of compact optical isolator and optically isolated method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810978022.3A CN108761826A (en) | 2018-08-27 | 2018-08-27 | A kind of compact optical isolator and optically isolated method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253136A (en) * | 2019-06-12 | 2019-09-20 | 光越科技(深圳)有限公司 | A kind of dodging device, light homogenizing equipment and even smooth method |
| CN111722421A (en) * | 2019-03-21 | 2020-09-29 | 光越科技(深圳)有限公司 | Optical isolator and laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2301801Y (en) * | 1997-07-08 | 1998-12-23 | 云南大学 | Optic isolator |
| US20040240031A1 (en) * | 2003-03-13 | 2004-12-02 | Masud Azimi | Compact multipass optical isolator |
| CN101666920A (en) * | 2009-09-21 | 2010-03-10 | 深圳朗光科技有限公司 | Optoisolator |
| CN204557003U (en) * | 2015-04-13 | 2015-08-12 | 福州腾景光电科技有限公司 | The online optical-fiber laser isolator of a kind of compact reflection-type |
| CN208834019U (en) * | 2018-08-27 | 2019-05-07 | 光越科技(深圳)有限公司 | A kind of compact optical isolator |
-
2018
- 2018-08-27 CN CN201810978022.3A patent/CN108761826A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2301801Y (en) * | 1997-07-08 | 1998-12-23 | 云南大学 | Optic isolator |
| US20040240031A1 (en) * | 2003-03-13 | 2004-12-02 | Masud Azimi | Compact multipass optical isolator |
| CN101666920A (en) * | 2009-09-21 | 2010-03-10 | 深圳朗光科技有限公司 | Optoisolator |
| CN204557003U (en) * | 2015-04-13 | 2015-08-12 | 福州腾景光电科技有限公司 | The online optical-fiber laser isolator of a kind of compact reflection-type |
| CN208834019U (en) * | 2018-08-27 | 2019-05-07 | 光越科技(深圳)有限公司 | A kind of compact optical isolator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722421A (en) * | 2019-03-21 | 2020-09-29 | 光越科技(深圳)有限公司 | Optical isolator and laser |
| CN110253136A (en) * | 2019-06-12 | 2019-09-20 | 光越科技(深圳)有限公司 | A kind of dodging device, light homogenizing equipment and even smooth method |
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