CN105511121B - Optoisolator - Google Patents
Optoisolator Download PDFInfo
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- CN105511121B CN105511121B CN201610072874.7A CN201610072874A CN105511121B CN 105511121 B CN105511121 B CN 105511121B CN 201610072874 A CN201610072874 A CN 201610072874A CN 105511121 B CN105511121 B CN 105511121B
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- light splitting
- light
- diaphragm
- optoisolator
- splitting device
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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
- G02F1/01—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 for the control of the intensity, phase, polarisation or colour
- G02F1/09—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 for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—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 for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
The present invention provides a kind of optoisolator, optoisolator is provided with the first light splitting device along optical path direction, optically-active device and the second light splitting device, wherein, optoisolator is provided with the first diaphragm between the first light splitting device and the second light splitting device, first diaphragm includes the first stop part being arranged between the first light splitting optical path of the first light splitting device and the second light splitting optical path of the first light splitting device, the stop part of diaphragm is provided with position between the first light splitting optical path and the second light splitting optical path, the return light with certain angle is stopped by stop part, in the case where not influenceing normal use, the ingenious position of stop part effectively stops the return light of indefinite angle, effectively improve the optically isolated performance of optoisolator.
Description
Technical field
The present invention relates to optical technical field, more particularly to a kind of optoisolator.
Background technology
In high powered laser system, in order to prevent influenceing the steady running of laser even in return light return system
Laser internal component is destroyed, optoisolator need to be often added, light is unidirectionally passed through.
However, existing optoisolator is by being provided with optically-active device and light splitting device, when there is strong reflection return
When, by the cooperation of optically-active device and light splitting device make light can not backtracking into laser, though optoisolator
Reflected light can be so effectively isolated, is prevented inside its return laser light device, but when reflected light is not along backtracking inclined one
Determine angle return so that the light path skew after optically-active device and light splitting device, it will be reflected back to a certain extent
In laser, it will cause laser to damage so that high powered laser system needs the maintenance charge for enclosing great number to use, increase
Use cost.
The content of the invention
It is an object of the invention to provide a kind of optoisolator with good optically isolated performance.
In order to realize the purpose of the present invention, the present invention provides a kind of optoisolator, optical path direction is provided with the first polarization
Light-dividing device, optically-active device and the second light splitting device, wherein, optoisolator polarizes in the first light splitting device and second
Be provided with the first diaphragm between light-dividing device, the first diaphragm include the first light splitting optical path for being arranged on the first light splitting device and
The first stop part between second light splitting optical path of the first light splitting device.
From such scheme, due under being used cooperatively of light splitting device and optically-active device, the light of backtracking
After light splitting device and optically-active device, light path skew will not occur, the light of return will not be incided in collimater
Then do not return in laser yet, but when there is the reflection of the return light with certain angle, its return light path will
Change, the stop part of diaphragm is provided with the position between the first light splitting optical path and the second light splitting optical path, passes through stop
Portion stops to return light, and in the case where not influenceing normal use, the ingenious position of stop part effectively stops indefinite angle
The return light of degree, effectively improve the optically isolated performance of optoisolator.
Further scheme is that the first diaphragm is provided with the first transmittance section and the second transmittance section, and the first light splitting optical path is worn
The first transmittance section is crossed, the second light splitting optical path passes through the second transmittance section.
Therefore in order to further improve optically isolated performance, it is in larger area that diaphragm, which is set, and it is light splitting light
Road sets transmittance section respectively so that the laser of output can be exported from transmittance section, and the light of return is all blocked outside portion and transmittance section
Diaphragm stop.
Further scheme is that the first diaphragm is arranged on the first light splitting device, optically-active device or the second polarization point
On electro-optical device.
Therefore in addition to diaphragm except separate type is arranged between light splitting device, diaphragm can also snugly connect
It is connected in light splitting device.
Further scheme is that optically-active device includes faraday rotator, the first light splitting optical path and the second light splitting optical path
Through faraday rotator.
Further scheme is, optically-active device also include being arranged on the first light splitting device and faraday rotator it
Between wave plate.
Further scheme is, optically-active device also include being arranged on the second light splitting device and faraday rotator it
Between wave plate.
Further scheme is that the first diaphragm is arranged on wave plate or faraday rotator.
Therefore optically-active device can be by the cooperation of wave plate and faraday rotator such as magnetic rotation luminescent crystal, it sets position
Put to be rotated as needed, and the polarization state for effectively making light by optically-active device is rotated, so as to effectively improve light
Isolation, and the set location of diaphragm can carry out multiple choices according to actual conditions.
Further scheme is that optoisolator also includes the second diaphragm for being arranged on the first light splitting device prime,
Second diaphragm includes the 3rd transmittance section, and the input path of the first light splitting device passes through the 3rd transmittance section.
Further scheme is that the second diaphragm includes the second stop part, and the second stop part is arranged on the 3rd printing opacity periphery.
Further scheme is that optoisolator also includes the 3rd diaphragm for being arranged on the second light splitting device rear class,
3rd diaphragm includes the 4th transmittance section and the 3rd stop part, and the output light path of the second light splitting device passes through the 4th transmittance section,
3rd stop part is arranged on the 4th printing opacity periphery.
Therefore the second diaphragm is arranged on to the rear class of collimater, and the setting second of the 3rd diaphragm is polarized point
The rear class of electro-optical device, it can stop and absorb most of return light, further improve optically isolated degree.
Brief description of the drawings
Fig. 1 is the light output schematic diagram of optoisolator first embodiment of the present invention.
Fig. 2 is that the first light of optoisolator first embodiment of the present invention returns to schematic diagram.
Fig. 3 is that the second light of optoisolator first embodiment of the present invention returns to schematic diagram.
Fig. 4 is the light output schematic diagram of optoisolator second embodiment of the present invention.
Fig. 5 is the structure chart of optoisolator in optoisolator second embodiment of the present invention.
Fig. 6 is the light output schematic diagram of optoisolator 3rd embodiment of the present invention.
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
Optoisolator first embodiment：
Reference picture 1, Fig. 1 are the light output schematic diagrams of optoisolator, and optoisolator is provided with optical fiber 11, standard along optical path direction
Straight device 12, diaphragm 13, light splitting device 14, diaphragm 15, wave plate 16, magnetic rotation luminescent crystal 17, light splitting device 18 and diaphragm
19, one end of optical fiber 11 is connected with collimater 12, and the other end of optical fiber 11 is connected with laser, and the resonator output of laser swashs
Collimater 12 is transferred to by optical fiber after light, then collimates and exports along output light path by collimater 12.
Diaphragm 13 is provided with transmittance section at middle part, and diaphragm 13 is provided with stop part on the position of transmittance section periphery,
The output light path of collimater 12 passes through the transmittance section of diaphragm 13.Through the laser light incident of diaphragm 13 to light splitting device 14, i.e.,
The input path of light splitting device 14 passes through the transmittance section of diaphragm 13, light splitting device 14 include being made by analyzing crystal etc. and
Into Amici prism, such as wollaston prism or Rochon prism or the light splitting directly prepared by birefringece crystal are brilliant
Body, light splitting device 14 are split or closed beam output, laser light incident light splitting device 14 to the polarization state of free laser
Orthogonal first divided beams of output polarization state and the second divided beams, the first divided beams transmit along the first light splitting optical path afterwards, the
Two divided beams transmit along the second light splitting optical path.
Optically-active device includes wave plate 16 and faraday rotator in the present embodiment, and faraday rotator is brilliant using magnetic rotation
Body 17, the first divided beams and the second divided beams then pass through wave plate 16 and magnetic rotation luminescent crystal 17, the divided beams of linearly polarized light successively
After wave plate 16 and magnetic rotation luminescent crystal 17, wave plate 16 and magnetic rotation luminescent crystal 17 carry out rotation tune to the polarization direction of divided beams
It is whole.Then from the first divided beams and the second divided beams incident polarization light-dividing device that are adjusted by optically-active of the output of optically-active device
18, light splitting device 18 carries out conjunction beam to the first divided beams and the second divided beams, finally closes the laser after beam and passes through diaphragm 19
It is output to outside along the output light path of light splitting device 18, diaphragm 19 is provided with transmittance section, and diaphragm 19 at middle part in printing opacity
Stop part is provided with the position of portion periphery, the output light path of light splitting device 18 passes through the transmittance section of diaphragm 19.
Diaphragm 15 is arranged on the first light splitting optical path of light splitting device 14 and the second light splitting light of light splitting device 14
Between road, i.e., diaphragm 15 is arranged between the first divided beams and the second divided beams, it is preferable that diaphragm 15 includes stop part, diaphragm
15 stop part is in set with being covered between light splitting optical path, and is respectively arranged with printing opacity in the upper and lower end of diaphragm 15
Portion, the first divided beams just pass through in the transmittance section of the upper end of diaphragm 15, and the second divided beams is just in the saturating of the bottom of diaphragm 15
Light portion passes through.
Reference picture 2, Fig. 2 are that the first light of optoisolator returns to schematic diagram, when there is return light along backtracking, return light
After incident polarization light-dividing device 18, it is divided into the vertical return divided beams outgoing of two beam polarization states, subsequent two return to divided beams successively
Through magnetic rotation luminescent crystal 17 and wave plate 16, light splitting device is incided after the optically-active effect of magnetic rotation luminescent crystal 17 and wave plate 16
14, refraction does not occur after polarization state is adjusted for the first return divided beams positioned at upper end and returned along straight line to export, and subsequent first
Return to divided beams to be irradiated on the stop part of diaphragm 13, the second return divided beams positioned at lower end is rolled over after polarization state is adjusted
After penetrating and export, subsequent second return divided beams is irradiated on the stop part of diaphragm 13, it is seen that is passed through along the return light of backtracking
After crossing the light processing of light splitting device and optically-active device, its return light is not returned in collimater 12.
Reference picture 3, Fig. 3 is that the second light of optoisolator returns to schematic diagram, when there is return light to be in a clamp with original optical path
When the return incidence angle at angle returns so that return light is successively by light splitting device 18, magnetic rotation luminescent crystal 17, wave plate 16 and partially
Shake after light-dividing device 14, light path inclination and offset occurs for the first return divided beams and the second return divided beams, and now, first returns
Divided beams is radiated at after inclination and offset on the stop part of diaphragm 15, then effective stop return light incidence collimater 12, and first
Divided beams is returned to be irradiated to after inclination and offset on diaphragm 13.
Optoisolator second embodiment：
Reference picture 4 and Fig. 5, Fig. 4 are the light output schematic diagrams of optoisolator second embodiment, and Fig. 5 is the structure of diaphragm 20
Figure.Under same principle based on above-mentioned optoisolator first embodiment, optoisolator second embodiment is changed to diaphragm 20
Enter, for diaphragm 20 compared to diaphragm 15 in setting in relatively large area, diaphragm 20 is provided with two transmittance sections 22, light splitting device 14
The first light splitting optical path and the second light splitting optical path, diaphragm 20 is provided with stop part 21 on the position between transmittance section 22, and hinders
Stopper 21 is on the position between the first light splitting optical path and the second light splitting optical path.Along backtracking return light incidence when, return
Transmittance section 22 will be passed through by returning divided beams, but due under the light splitting of light splitting device 14 effect so that returning to divided beams will
It is irradiated on diaphragm 13, when return light is returned with the return incidence angle in a certain angle with original optical path, inclined return light is then
Transmittance section 22 can not be passed through, part returns to divided beams and is irradiated on stop part 21 so that return light will stop by diaphragm 20, effectively
Ground prevents return light from inciding collimater 12.
Optoisolator 3rd embodiment：
Reference picture 6, Fig. 6 are the light output schematic diagrams of optoisolator 3rd embodiment of the present invention.In the base of above-described embodiment
On plinth, the quantity of the first diaphragm being arranged between light splitting device can also be multiple, as shown in Figure 6 optoisolators the
Three embodiments also include diaphragm 23 mutually isostructural with diaphragm 20, and diaphragm 23 is arranged on magnetic rotation luminescent crystal 17 and polarization light-dividing device
Equally it is that the purpose of the present invention can be achieved, also so that another first diaphragm is arranged on into wave plate 16 and magnetic rotation luminescent crystal between 18
Between 17, it also can be achieved on the purpose of the present invention.
Therefore because under being used cooperatively of light splitting device and optically-active device, the light of backtracking is by inclined
Shake after light-dividing device and optically-active device, light path skew will not occur, the light of return will not be incided in collimater then
Do not return in laser, but when there is the reflection of the return light with certain angle, its return light path will become
Change, the stop part of diaphragm is provided with the position between the first light splitting optical path and the second light splitting optical path, by stop part to returning
Light echo is stopped, in the case where not influenceing normal use, the ingenious position of stop part effectively stops returning for indefinite angle
Light echo, effectively improve the optically isolated performance of optoisolator.
Above-described embodiment is presently preferred embodiments of the present invention, can have more changes in practical application, such as positioned at inclined
The second diaphragm to shake between light-dividing device 14 and light splitting device 18, except be arranged on light splitting device 14 and wave plate 16 it
Between it is outer, be also provided in other positioned at light splitting device 14 and light splitting device 18 between on optional position, and use
Attaching mode it is arranged on the surface of light splitting device 14, wave plate 16, magnetic rotation luminescent crystal 17 or light splitting device 18, only
If can realizes the purpose of the present invention between the stop part of diaphragm is arranged on into two light splitting optical paths.And change the He of wave plate 16
Both positions of magnetic rotation luminescent crystal 17, are that gyrotropi crystal and wave plate are set gradually along optical path direction, i.e., set magnetic rotation luminescent crystal 17
The side that wave plate 16 in the side of close light splitting device 14, is positioned close to light splitting device 18 is put, according to optically-active
Handling principle, equally be can be achieved the purpose of the present invention.Meanwhile optically-active device of the invention can also use other optically-actives brilliant
Body, such as quartz crystal replace wave plate to carry out optically-active processing to light beam together with magnetic rotation luminescent crystal, and above-described embodiment is accurate
Straight device removes, and only with the combination of polarization light-dividing device and optically-active device, light directly exports polarization light-dividing device, these changes
Also it is that by the purpose of the present invention.
Claims (10)
1. optoisolator, optical path direction is provided with the first light splitting device, optically-active device and the second light splitting device；
It is characterized in that：
The optoisolator is provided with the first light between first light splitting device and second light splitting device
Door screen, first diaphragm include being arranged on the first light splitting optical path of first light splitting device and first polarization spectro
The first stop part between second light splitting optical path of device.
2. optoisolator according to claim 1, it is characterised in that：
First diaphragm is provided with the first transmittance section and the second transmittance section, and first light splitting optical path passes through first printing opacity
Portion, second light splitting optical path pass through second transmittance section.
3. optoisolator according to claim 1 or 2, it is characterised in that：
First diaphragm is arranged on first light splitting device, the optically-active device or second light splitting device
On.
4. optoisolator according to claim 1, it is characterised in that：
The optically-active device includes faraday rotator, and first light splitting optical path and second light splitting optical path pass through the method
Draw optical rotation plate.
5. optoisolator according to claim 4, it is characterised in that：
The optically-active device also includes the wave plate being arranged between first light splitting device and the faraday rotator.
6. optoisolator according to claim 4, it is characterised in that：
The optically-active device also includes the wave plate being arranged between second light splitting device and the faraday rotator.
7. the optoisolator according to claim 5 or 6, it is characterised in that：
First diaphragm is arranged on the wave plate or the faraday rotator.
8. according to the optoisolator described in claim 2, any one of 4-6, it is characterised in that：
The optoisolator also includes the second diaphragm for being arranged on the first light splitting device prime, the second diaphragm bag
The 3rd transmittance section is included, the input path of first light splitting device passes through the 3rd transmittance section.
9. optoisolator according to claim 8, it is characterised in that：
Second diaphragm includes the second stop part, and second stop part is arranged on the 3rd printing opacity periphery.
10. according to the optoisolator described in claim 2, any one of 4-6, it is characterised in that：
The optoisolator also includes the 3rd diaphragm for being arranged on the second light splitting device rear class, the 3rd diaphragm bag
The 4th transmittance section and the 3rd stop part are included, the output light path of second light splitting device passes through the 4th transmittance section, institute
State the 3rd stop part and be arranged on the 4th printing opacity periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610072874.7A CN105511121B (en) | 2016-02-02 | 2016-02-02 | Optoisolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610072874.7A CN105511121B (en) | 2016-02-02 | 2016-02-02 | Optoisolator |
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| Publication Number | Publication Date |
|---|---|
| CN105511121A CN105511121A (en) | 2016-04-20 |
| CN105511121B true CN105511121B (en) | 2018-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610072874.7A Active CN105511121B (en) | 2016-02-02 | 2016-02-02 | Optoisolator |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020887B (en) * | 2016-11-04 | 2020-05-29 | 珠海光库科技股份有限公司 | Optical fiber isolator and refractive index compensation method thereof |
| CN106353855A (en) * | 2016-11-14 | 2017-01-25 | 福建福晶科技股份有限公司 | Optical isolator at high isolation degree |
| CN108345131B (en) * | 2018-03-15 | 2023-10-20 | 中国科学技术大学 | Faraday isolator device |
| CN113155040B (en) * | 2021-03-04 | 2023-02-28 | 上海精测半导体技术有限公司 | Device and method for detecting angle change of reflected light beam and film thickness measuring device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365011A (en) * | 2000-07-14 | 2002-08-21 | Jds尤尼费斯公司 | Beam splitter and beam combiner with isolated polarized beam |
| CN102798989A (en) * | 2012-08-30 | 2012-11-28 | 深圳市艾格莱光电科技有限公司 | Faraday optical rotation method and device, and optical isolation method and device using Faraday optical rotation device |
| CN103913857A (en) * | 2014-04-01 | 2014-07-09 | 深圳市艾格莱光电科技有限公司 | Optical isolation method and optical isolation device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04204712A (en) * | 1990-11-30 | 1992-07-27 | Mitsubishi Kasei Corp | Optical isolator |
| JPH0540243A (en) * | 1991-08-06 | 1993-02-19 | Fuji Elelctrochem Co Ltd | Optical isolator |
-
2016
- 2016-02-02 CN CN201610072874.7A patent/CN105511121B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365011A (en) * | 2000-07-14 | 2002-08-21 | Jds尤尼费斯公司 | Beam splitter and beam combiner with isolated polarized beam |
| CN102798989A (en) * | 2012-08-30 | 2012-11-28 | 深圳市艾格莱光电科技有限公司 | Faraday optical rotation method and device, and optical isolation method and device using Faraday optical rotation device |
| CN103913857A (en) * | 2014-04-01 | 2014-07-09 | 深圳市艾格莱光电科技有限公司 | Optical isolation method and optical isolation device |
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| CN105511121A (en) | 2016-04-20 |
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