CN105717668A - Optical isolator - Google Patents
Optical isolator Download PDFInfo
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- CN105717668A CN105717668A CN201610284889.XA CN201610284889A CN105717668A CN 105717668 A CN105717668 A CN 105717668A CN 201610284889 A CN201610284889 A CN 201610284889A CN 105717668 A CN105717668 A CN 105717668A
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- polarized light
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- line polarized
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- faraday rotation
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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
Abstract
The invention discloses an optical isolator. Input light is divided into first linear polarization light and second linear polarization light through a first beam splitter; the first linear polarization light is divided into first secondary linear polarization light and second secondary linear polarization light through a second beam splitter, and the second linear polarization light is divided into third secondary linear polarization light and fourth secondary linear polarization light through the second beam splitter; a first Faraday rotary piece is used for carrying out rotary treatment on the first secondary linear polarization light and the second secondary linear polarization light; a second Faraday rotary piece is used for carrying out the rotary treatment on the third secondary linear polarization light and the fourth secondary linear polarization light; first combined linear polarization light is formed by the first secondary linear polarization light and the second secondary linear polarization light through a third beam splitter, and second combined linear polarization light is formed by the third secondary linear polarization light and the fourth secondary linear polarization light through the third beam splitter; and the first combined linear polarization light and the second combined linear polarization light are synthesized into output light through a fourth beam splitter. With the adoption of the optical isolator, the total power bearing capability of the optical isolator can be improved and the stability of the optical isolator is improved.
Description
Technical field
The present invention relates to laser technology field, particularly relate to a kind of optoisolator.
Background technology
Optoisolator is that a kind of Faraday effect utilizing magneto-optical crystal realizes that forward insertion loss is low, reverse isolation degree high, return loss is high, it is achieved light only to a direction by and the passive device that stops light to pass through round about.
At present, the core parts in optoisolator are based primarily upon Gd-Ga garnet, rotation glass, bismuth iron garnet or yttrium iron garnet.And the German number of Wei Er of Gd-Ga garnet and rotation glass is relatively low, the volume based on Gd-Ga garnet and the optoisolator of rotation glass is generally relatively larger, and cost is higher.And the German number of Wei Er of bismuth iron garnet and yttrium iron garnet is significantly high, bismuth iron garnet and yttrium iron garnet absorb significantly high, particularly in 1030 to the 1100nm wave-length coverage being in great demand, and in power high situation the poor stability of bismuth iron garnet and yttrium iron garnet, thus causing the poor stability of optoisolator.When the power of light is more than 300mw, the heat that the heat that bismuth iron garnet and yttrium iron garnet absorb can dissipate more than device, the temperature of bismuth iron garnet and yttrium iron garnet can constantly raise, and loss is greatly increased, it is possible to causes that system is damaged.
But industrial expansion, luminous power requires more and more higher, and the stability how improving optoisolator has become as problem in the urgent need to address.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of optoisolator, it is possible to increase the general power ability to bear of optoisolator, improves the stability of optoisolator.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts is: provide a kind of optoisolator to include first collimator, the first beam splitter, the second beam splitter, the first Faraday rotation sheet, permanent magnet, the second Faraday rotation sheet, the 3rd beam splitter, the 4th beam splitter, the second collimator and half-wave plate；Described first collimator, the first beam splitter, the second beam splitter, the first Faraday rotation sheet, permanent magnet, the second Faraday rotation sheet, the 3rd beam splitter, the 4th beam splitter and the second collimator set gradually, and described half-wave plate is arranged between described second beam splitter and the first Faraday rotation sheet or between the second Faraday rotation sheet and the 3rd beam splitter；Described first collimator is used for receiving input light, and described input light is carried out collimation process；Described first beam splitter is split process, output First Line polarized light and the second line polarized light for the input light after collimation process；Described second beam splitter, for described First Line polarized light is split process, exports the first sub-line polarized light and the second sub-line polarized light, and described second line polarized light is split process, exports the 3rd sub-line polarized light and the 4th sub-line polarized light；Described permanent magnet is used for providing magnetic field；Described first Faraday rotation sheet is for rotating process to described first sub-line polarized light and the second sub-line polarized light；Described second Faraday rotation sheet is for rotating process to described 3rd sub-line polarized light and the 4th sub-line polarized light；Described 3rd beam splitter, for carrying out the first sub-line polarized light after described first Faraday rotation sheet rotation processing and the second sub-line polarized light closing bundle process, output the first conjunction bunch polarized light, and the 3rd sub-line polarized light after described second Faraday rotation sheet rotation processing and the 4th sub-line polarized light are carried out closing bundle process, output the second conjunction bunch polarized light；Described 4th beam splitter, carries out closing bundle process for closing bunch polarized light and the second conjunction bunch polarized light to described first, output output light；Described second collimator is for output after described output light is collimated.
Wherein, the primary optical axis of described First Line polarized light and the second line polarized light is parallel, and the plane of polarization of described First Line polarized light and the second line polarized light is mutually perpendicular to；The primary optical axis of described first sub-line polarized light and the second sub-line polarized light is parallel, and the plane of polarization of described first sub-line polarized light and the second sub-line polarized light is mutually perpendicular to, the primary optical axis of described 3rd sub-line polarized light and the 4th sub-line polarized light is parallel, and the plane of polarization of described 3rd sub-line polarized light and the 4th sub-line polarized light is mutually perpendicular to；The primary optical axis that described first conjunction bunch polarized light and second closes bunch polarized light is parallel, and the described first plane of polarization closing bunch polarized light and the second conjunction bunch polarized light is mutually perpendicular to.
Wherein, between described first beam splitter and the principal section of the second beam splitter, angle is 45 degree, meets following relation between described First Line polarized light, the second line polarized light and the power of input light,
Following relation is met between the power of described first sub-line polarized light, the second sub-line polarized light, the 3rd sub-line polarized light and the 4th sub-line polarized light and input light,
Described P1For the power of First Line polarized light, described P2For the power of described second line polarized light, described PEnterFor inputting the power of light, described P '1It is the power of the first sub-polarized light, described P '2It is the power of the second sub-polarized light, described P '3It is the power of the 3rd sub-polarized light, described P '4It is the power of the 4th sub-polarized light.
Wherein, described optoisolator also includes the first fin and the second fin；
Described first fin and the second fin are respectively arranged at the two ends of described permanent magnet, and described first Faraday rotation sheet is arranged in described first fin, and described second Faraday rotation sheet is arranged in described second fin.
Wherein, described optoisolator also includes radiating shell；Described first Faraday rotation sheet, permanent magnet, the second Faraday rotation sheet, the first fin and the second fin are arranged at radiating shell.
Wherein, described radiating shell arranges receiving space, the first opening and the second opening, and described first opening and the second opening all connect with receiving space；Described permanent magnet is arranged in described receiving space, and described first fin is arranged at described first opening, and described second fin is arranged at the second opening.
Wherein, described first fin and the second fin are ruby or sapphire, and described radiating shell is copper or ferrum.
Wherein, described first Faraday rotation sheet and the second Faraday rotation sheet are bismuth iron garnet, yttrium iron garnet or terbium gallium garnet.
Wherein, described half-wave plate, the first beam splitter, the second beam splitter, the 3rd beam splitter and the 4th beam splitter are birefringece crystal.
Wherein, described half-wave plate is quartz crystal.
The invention has the beneficial effects as follows: be different from the situation of prior art, input light is beamed into the first sub-line polarized light by the first beam splitter and the second beam splitter by the present invention, second sub-line polarized light, 3rd sub-line polarized light and the 4th sub-line polarized light, first sub-line polarized light and the second sub-line polarized light are rotated process by the first Faraday rotation sheet, 3rd sub-line polarized light and the 4th sub-line polarized light are rotated process by the second Faraday rotation sheet, and the power sum of first to fourth sub-polarized light is equal to the power of input light, on the contrary, the power of every a branch of sub-line polarized light is below the power of input light, thus reducing the power of unit hot spot on the first Faraday rotation sheet and the second Faraday rotation sheet, the heat absorbing units making the first Faraday rotation sheet and the second Faraday rotation sheet is absorbed heat less when equal input power, improve the first Faraday rotation sheet and the general power ability to bear of the second Faraday rotation sheet, and then improve the general power ability to bear of optoisolator.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of optoisolator embodiment of the present invention；
Fig. 2 is the axonometric chart of optoisolator embodiment of the present invention；
Fig. 3 is the schematic diagram of the logical light of optoisolator forward in optoisolator embodiment of the present invention；
Fig. 4 is the schematic diagram of optoisolator reversely logical light in optoisolator embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and embodiments, the present invention is described in detail.
Referring to Fig. 1, optoisolator 20 includes first collimator the 21, first beam splitter the 22, second beam splitter the 23, first Faraday rotation sheet 24, permanent magnet the 25, second Faraday rotation sheet the 26, the 3rd beam splitter the 27, the 4th beam splitter the 28, second collimator 29 and half-wave plate 30.
First collimator the 21, first beam splitter the 22, second beam splitter the 23, first Faraday rotation sheet 24, permanent magnet the 25, second Faraday rotation sheet the 26, the 3rd beam splitter the 27, the 4th beam splitter 28 and the second collimator 29 set gradually, and half-wave plate 30 is arranged between the second beam splitter 23 and the first Faraday rotation sheet 24 or between the second Faraday rotation sheet 26 and the 3rd beam splitter 27.
Described first collimator 21 is used for receiving input light, and described input light is carried out collimation process.First beam splitter 22 is split process, output First Line polarized light and the second line polarized light for the input light after collimation process.Second beam splitter 23, for First Line polarized light is split process, exports the first sub-line polarized light and the second sub-line polarized light, and the second line polarized light is split process, exports the 3rd sub-line polarized light and the 4th sub-line polarized light.Permanent magnet 25 is used for providing magnetic field.First Faraday rotation sheet 24 is for rotating process to the first sub-line polarized light and the second sub-line polarized light.Second Faraday rotation sheet 26 is for rotating process to the 3rd sub-line polarized light and the 4th sub-line polarized light.3rd beam splitter 27, for carrying out the first sub-line polarized light after the first Faraday rotation sheet 24 rotation processing and the second sub-line polarized light closing bundle process, output the first conjunction bunch polarized light, and the 3rd sub-line polarized light after the second Faraday rotation sheet 26 rotation processing and the 4th sub-line polarized light are carried out closing bundle process, output the second conjunction bunch polarized light.4th beam splitter 28 carries out closing bundle process for closing bunch polarized light and the second conjunction bunch polarized light to first, output output light.Second collimator 29 is for output after output light is collimated.
By the first beam splitter 22 and the second beam splitter 23, input light is divided into first to fourth 4 and restraints sub-line polarized light, the power of every a branch of sub-line polarized light is below the power of input light, when the first sub-line polarized light and the second sub-line polarized light get to the first Faraday rotation sheet 24, the heat that first sub-line polarized light and the second sub-line polarized light produce on the first Faraday rotation sheet 24 is less, same, the heat that 3rd sub-line polarized light and the 4th sub-line polarized light produce on the second Faraday rotation sheet 26 is also less, thus alleviating the heat radiation pressure of the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26, improve the general power ability to bear of optoisolator, improve the stability of optoisolator.Compared to common two light beam isolators, the optically isolated general power ability to bear in present embodiment is double, and volume is only about 1/4 than two light beam isolators, and cost more equal general power ability to bear isolator is lower.
It should be understood that the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 are both preferably bismuth iron garnet, yttrium iron garnet or terbium gallium garnet.When the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 are bismuth iron garnet or yttrium iron garnet, the power-carrying of optoisolator is at 500mW to 3W, when the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 are terbium gallium garnet, the power-carrying of optoisolator can reach 200W.It addition, the optoisolator in present embodiment has the further advantage that (1) optical isolator structural volume is little, suitable system is integrated, is especially suitable for the prime in superpower laser, amplifier and amplifies；(2) photo structure materials are few, and material is cheap, is beneficial to volume production, very low cost, are conducive to system to reduce cost；(3) heat radiation is better, and the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 heat absorbing units are absorbed heat less when equal input power, and the total power bearing ability of optoisolator is higher；(4) can pass through to adjust number of spots and the power of the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26, control the quantity of the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 heat absorbing units, obtain different power carrying ranks, in less demanding occasion, it is possible to reduce cost further；(5) can also designing the size of the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26, while being greatly improved power-carrying, taking into account cost will not promote；(6) structure of optical isolator active heat removal need not can reach higher-wattage, is substantially reduced complexity and promotes system reliability, also reducing cost, be more conducive to volume production device.
Concrete, when input light is split by the first beam splitter 22, first beam splitter 22 is on 45 degree of inclined-planes, input light to be split, so that the primary optical axis of First Line polarized light and the second line polarized light is parallel, and the plane of polarization of First Line polarized light and the second line polarized light is mutually perpendicular to, additionally, between First Line polarized light and the second line polarized light also spaced a predetermined distance, same, when First Line polarized light and the second line polarized light are split by the second beam splitter 23, 3rd beam splitter 27 is also be split on 45 degree of inclined-planes, so that the primary optical axis of the first sub-line polarized light and the second sub-line polarized light is parallel, and the plane of polarization of the first sub-line polarized light and the second sub-line polarized light is mutually perpendicular to, the primary optical axis of the 3rd sub-line polarized light and the 4th sub-line polarized light is parallel, and the plane of polarization of the 3rd sub-line polarized light and the 4th sub-line polarized light is mutually perpendicular to.Further, the primary optical axis that the first conjunction bunch polarized light and second closes bunch polarized light is also parallel, and the first plane of polarization closing bunch polarized light and the second conjunction bunch polarized light is mutually perpendicular to.
In order to the power making the first sub-line polarized light, the second sub-line polarized light, the 3rd sub-line polarized light and the 4th sub-line polarized light is more parallel, angle between first beam splitter 22 and the principal section of the second beam splitter 23 is set to 45 degree, as shown in Figure 2, then meet following relation between First Line polarized light, the second line polarized light and the power of input light
Following relation is met between the power of the first sub-line polarized light, the second sub-line polarized light, the 3rd sub-line polarized light and the 4th sub-line polarized light and input light,
P1For the power of First Line polarized light, P2It is the power of the second line polarized light, PEnterFor inputting the power of light, P '1It is the power of the first sub-polarized light, P '2It is the power of the second sub-polarized light, P '3It is the power of the 3rd sub-polarized light, P '4It is the power of the 4th sub-polarized light.In brief, the power of First Line polarized light and the power of the second line polarized light are identical, and equal to the half of input light；The power of the first sub-line polarized light, the second sub-line polarized light, the 3rd sub-line polarized light and the 4th sub-line polarized light is identical, and equal to 1/4th of input light.In the present embodiment, preferably, half-wave plate the 30, first beam splitter the 22, second beam splitter the 23, the 3rd beam splitter 27 and the 4th beam splitter 28 are birefringece crystal, wherein, first beam splitter 22 and the 4th beam splitter 28 constitute birefringece crystal pair, and the second beam splitter 23 and the 3rd beam splitter 27 constitute dijection crystal pair.The optical axis of half-wave plate 30 is perpendicular to the first sub-line polarized light, the second sub-line polarized light, the 3rd sub-line polarized light and the 4th sub-line polarized light, the plane of polarization of the light of the first sub-line polarized light, the second sub-line polarized light, the 3rd sub-line polarized light and the 4th sub-line polarized light is rotated certain angle towards the direction of its optical axis by half-wave plate 30, its optical axis is the symmetrical center line of angle, and this angle is the twice in input light polarization face and the angle of its optical axis.In order to accurately control the Phase delay of optical isolator, half-wave plate 30 can select the weak birefringence crystal such as quartz crystal.
In order to convenient, first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 being dispelled the heat, optoisolator also includes the first fin 31 and the second fin 32.First fin 31 and the second fin 32 are respectively arranged at the two ends of permanent magnet 25, and the first Faraday rotation sheet 24 is arranged in the first fin 31, and the second Faraday rotation sheet 26 is arranged in the second fin 32.Wherein, first fin 31 and the second fin 32 do not affect the transmission of light, but the first fin 31 and the second fin 32 have good heat conductivility, very well the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 can be dispelled the heat, in the present embodiment, preferably, first fin 31 and the second fin 32 are ruby or sapphire, ruby or sapphire are the materials of high heat conductance, it is possible to lead away the heat in any region on the logical bright finish of the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 fully.
Further, optoisolator also includes radiating shell 33.First Faraday rotation sheet 24, permanent magnet the 25, second Faraday rotation sheet the 26, first fin 31 and the second fin 32 are arranged at radiating shell 33.First fin the 31, second fin 32 and permanent magnet 25 can be dispelled the heat by radiating shell 33, and then realize the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 are dispelled the heat.Concrete, radiating shell 33 arranges receiving space (sign), the first opening (sign) and the second opening (sign), the first opening and the second opening and all connects with receiving space.Permanent magnet 25 is arranged in receiving space, and the first fin 31 is arranged at the first opening, and the second fin 32 is arranged at the second opening.In the present embodiment, it is preferred that radiating shell 33 is copper or ferrum.Between second Faraday rotation sheet 26 and the second fin 32, between the first Faraday rotation sheet 24 and the first fin 31, the first fin 31, all can be attached by bonding mode between permanent magnet 25 and the second fin 32 and radiating shell 33.
What deserves to be explained is: above-mentioned is list two groups of beam splitters and two combined beam devices to increase the quantity of the hot spot of single Faraday rotation sheet, thus reducing the power of single hot spot, improve optoisolator general power bearing capacity, those skilled in the art can also expand to the situation of the more beam splitters of three groups of beam splitters and three combined beam devices, four groups of beam splitters and four combined beam devices etc. and bundling device according to the know-why of the present invention, to increase the quantity of the hot spot of single Faraday rotation sheet, thus reducing the power of single hot spot.Certainly, when increasing beam splitter and bundling device, it is also possible to increase the quantity of Faraday rotation sheet as required.
In order to help reader to be more fully understood that the present invention, again the light path of optoisolator is illustrated as follows.
Referring to Fig. 3, forward leads to light
1. input beam is divided into the two orthogonal line polarisations of bundle polarization state through the first beam splitter 22, respectively First Line polarized light H and the second line polarized light Q.
2. First Line polarized light H and the second line polarized light Q is respectively through the second beam splitter 23, it is divided into 4 bunch polarized light, respectively the first sub-line polarized light a, the second sub-line polarized light b, the 3rd sub-line polarized light c and the four sub-line polarized light d, wherein, the polarization state of the first sub-line polarized light a and the second sub-line polarized light b is mutually perpendicular to, the polarization state of the 3rd sub-line polarized light c and the four sub-line polarized light d is mutually perpendicular to > the first sub-line polarized light a, the second sub-line polarized light b, the 3rd sub-line polarized light c and the four sub-line polarized light d through half-wave plate 30, polarization state is unified rotates 45 °
3. the first sub-line polarized light a and the second sub-line polarized light b is through the first Faraday rotation sheet 24, and its polarization state continues to rotate 45 °, and O light becomes E light.
4. the first sub-line polarized light a, the second sub-line polarized light b, the 3rd sub-line polarized light c and the four sub-line polarized light d through the first fin 31 and the second fin 32, its polarization state does not change.
5. the 3rd sub-line polarized light c and the four sub-line polarized light d is through the second Faraday rotation sheet 26, and its polarization state continues to rotate 45 °, and O light becomes E light (for beam splitter 2,3)
6. the first sub-line polarized light a, the second sub-line polarized light b, the 3rd sub-line polarized light c and the four sub-line polarized light d through the 3rd beam splitter 27, closing bundle is that the first conjunction bunch polarized light and second closes bunch polarized light
7. first close bunch polarized light and the second conjunction bunch polarized light through the 4th beam splitter 28, close bundle for output light.
Refer to Fig. 4, reversely logical light
1. input light is through the 4th beam splitter 28, is divided into the two orthogonal First Line polarized light of bundle polarization state and the second line polarized lights.
2. First Line polarized light and the second line polarized light are respectively through the 3rd beam splitter 27, are divided into 4 bundle polarized light, are respectively as follows: the first sub-line polarized light a, the second sub-line polarized light b, the 3rd sub-line polarized light c and the four sub-line polarized light d；First sub-line polarized light a and the second sub-line polarized light b is mutually perpendicular in the polarization state of crystal, and the polarization state of the 3rd sub-line polarized light c and the four sub-line polarized light d is mutually perpendicular to.
3. the first sub-line polarized light a and the second sub-line polarized light b is through the second Faraday rotation sheet 26, and polarization state rotates 45 °.
4. the first sub-line polarized light a, the second sub-line polarized light b, the 3rd sub-line polarized light c and the four sub-line polarized light d through the first fin 31 and the second fin 32, its polarization state does not change.
5. the 3rd sub-line polarized light c and the four sub-line polarized light d is through the first Faraday rotation sheet 24, and its polarization state rotates 45 °.
6. four bundle light are through half-wave plate 30, its polarization state is unified reversely rotate 45 ° now 0, E polarization state do not change.
7. four bundle light continue deviation through the second beam splitter 23, E light, and O light direction does not change
8 four bundle light are through the first beam splitter 22, and often bundle light beam splitting 2 is restrainted, and owing to wherein 4 bundle light compositings 2 are restrainted, exit facet forms 6 bundle light, and in the middle of light intensity, 2 points (a2, b2) are 25% general power, disperse at 4 and are 12.5% general power.
In embodiments of the present invention, by the first beam splitter 22 and the second beam splitter 23, input light is beamed into the first sub-line polarized light, second sub-line polarized light, 3rd sub-line polarized light and the 4th sub-line polarized light, first sub-line polarized light and the second sub-line polarized light are rotated process by the first Faraday rotation sheet 24, 3rd sub-line polarized light and the 4th sub-line polarized light are rotated process by the second Faraday rotation sheet 26, and the power sum of first to fourth sub-polarized light is equal to the power of input light, on the contrary, the power of every a branch of sub-line polarized light is below the power of input light, thus reducing the power of unit hot spot on the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26, the heat absorbing units making the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26 is absorbed heat less when equal input power, improve the general power ability to bear of the first Faraday rotation sheet 24 and the second Faraday rotation sheet 26, and then improve the general power ability to bear of optoisolator.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (10)
1. an optoisolator, it is characterised in that include first collimator, the first beam splitter, the second beam splitter, the first Faraday rotation sheet, permanent magnet, the second Faraday rotation sheet, the 3rd beam splitter, the 4th beam splitter, the second collimator and half-wave plate；
Described first collimator, the first beam splitter, the second beam splitter, the first Faraday rotation sheet, permanent magnet, the second Faraday rotation sheet, the 3rd beam splitter, the 4th beam splitter and the second collimator set gradually, and described half-wave plate is arranged between described second beam splitter and the first Faraday rotation sheet or between the second Faraday rotation sheet and the 3rd beam splitter；
Described first collimator is used for receiving input light, and described input light is carried out collimation process；
Described first beam splitter is split process, output First Line polarized light and the second line polarized light for the input light after collimation process；
Described second beam splitter, for described First Line polarized light is split process, exports the first sub-line polarized light and the second sub-line polarized light, and described second line polarized light is split process, exports the 3rd sub-line polarized light and the 4th sub-line polarized light；
Described permanent magnet is used for providing magnetic field；
Described first Faraday rotation sheet is for rotating process to described first sub-line polarized light and the second sub-line polarized light；
Described second Faraday rotation sheet is for rotating process to described 3rd sub-line polarized light and the 4th sub-line polarized light；
Described 3rd beam splitter, for carrying out the first sub-line polarized light after described first Faraday rotation sheet rotation processing and the second sub-line polarized light closing bundle process, output the first conjunction bunch polarized light, and the 3rd sub-line polarized light after described second Faraday rotation sheet rotation processing and the 4th sub-line polarized light are carried out closing bundle process, output the second conjunction bunch polarized light；
Described 4th beam splitter, carries out closing bundle process for closing bunch polarized light and the second conjunction bunch polarized light to described first, output output light；
Described second collimator is for output after described output light is collimated.
2. optoisolator according to claim 1, it is characterised in that
The primary optical axis of described First Line polarized light and the second line polarized light is parallel, and the plane of polarization of described First Line polarized light and the second line polarized light is mutually perpendicular to；
The primary optical axis of described first sub-line polarized light and the second sub-line polarized light is parallel, and the plane of polarization of described first sub-line polarized light and the second sub-line polarized light is mutually perpendicular to, the primary optical axis of described 3rd sub-line polarized light and the 4th sub-line polarized light is parallel, and the plane of polarization of described 3rd sub-line polarized light and the 4th sub-line polarized light is mutually perpendicular to；
The primary optical axis that described first conjunction bunch polarized light and second closes bunch polarized light is parallel, and the described first plane of polarization closing bunch polarized light and the second conjunction bunch polarized light is mutually perpendicular to.
3. optoisolator according to claim 2, it is characterised in that
Between described first beam splitter and the principal section of the second beam splitter, angle is 45 degree, meets following relation between described First Line polarized light, the second line polarized light and the power of input light,
Following relation is met between the power of described first sub-line polarized light, the second sub-line polarized light, the 3rd sub-line polarized light and the 4th sub-line polarized light and input light,
Described P1For the power of First Line polarized light, described P2For the power of described second line polarized light, described PEnterFor inputting the power of light, described P '1It is the power of the first sub-polarized light, described P '2It is the power of the second sub-polarized light, described P '3It is the power of the 3rd sub-polarized light, described P '4It is the power of the 4th sub-polarized light.
4. optoisolator according to claim 1, it is characterised in that
Described optoisolator also includes the first fin and the second fin；
Described first fin and the second fin are respectively arranged at the two ends of described permanent magnet, and described first Faraday rotation sheet is arranged in described first fin, and described second Faraday rotation sheet is arranged in described second fin.
5. optoisolator according to claim 4, it is characterised in that
Described optoisolator also includes radiating shell；
Described first Faraday rotation sheet, permanent magnet, the second Faraday rotation sheet, the first fin and the second fin are arranged at radiating shell.
6. optoisolator according to claim 5, it is characterised in that
Described radiating shell arranges receiving space, the first opening and the second opening, and described first opening and the second opening all connect with receiving space；
Described permanent magnet is arranged in described receiving space, and described first fin is arranged at described first opening, and described second fin is arranged at the second opening.
7. optoisolator according to claim 5, it is characterised in that
Described first fin and the second fin are ruby or sapphire, and described radiating shell is copper or ferrum.
8. optoisolator according to claim 1, it is characterised in that
Described first Faraday rotation sheet and the second Faraday rotation sheet are bismuth iron garnet, yttrium iron garnet or terbium gallium garnet.
9. optoisolator according to claim 1, it is characterised in that
Described half-wave plate, the first beam splitter, the second beam splitter, the 3rd beam splitter and the 4th beam splitter are birefringece crystal.
10. optoisolator according to claim 8, it is characterised in that
Described half-wave plate is quartz crystal.
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| CN201610284889.XA CN105717668B (en) | 2016-04-29 | 2016-04-29 | A kind of optoisolator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000180788A (en) * | 1998-12-14 | 2000-06-30 | Tokin Corp | Optical isolator |
| US20020154403A1 (en) * | 2001-04-23 | 2002-10-24 | Trotter, Donald M. | Photonic crystal optical isolator |
| US20030206345A1 (en) * | 2002-05-02 | 2003-11-06 | Robert Sabia | Optical isolators and methods of manufacture |
| CN101329488A (en) * | 2007-06-20 | 2008-12-24 | 骆勇 | Optical frequency and optical intensity modulator used for semiconductor laser |
| CN101666920A (en) * | 2009-09-21 | 2010-03-10 | 深圳朗光科技有限公司 | Optoisolator |
| CN103278943A (en) * | 2013-03-29 | 2013-09-04 | 北京航空航天大学 | Faraday rotator suitable for high-power opto-isolator |
-
2016
- 2016-04-29 CN CN201610284889.XA patent/CN105717668B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000180788A (en) * | 1998-12-14 | 2000-06-30 | Tokin Corp | Optical isolator |
| US20020154403A1 (en) * | 2001-04-23 | 2002-10-24 | Trotter, Donald M. | Photonic crystal optical isolator |
| US20030206345A1 (en) * | 2002-05-02 | 2003-11-06 | Robert Sabia | Optical isolators and methods of manufacture |
| CN101329488A (en) * | 2007-06-20 | 2008-12-24 | 骆勇 | Optical frequency and optical intensity modulator used for semiconductor laser |
| CN101666920A (en) * | 2009-09-21 | 2010-03-10 | 深圳朗光科技有限公司 | Optoisolator |
| CN103278943A (en) * | 2013-03-29 | 2013-09-04 | 北京航空航天大学 | Faraday rotator suitable for high-power opto-isolator |
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